diff options
30 files changed, 1103 insertions, 247 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-74x164.txt b/Documentation/devicetree/bindings/gpio/gpio-74x164.txt new file mode 100644 index 00000000000..cc2608021f2 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-74x164.txt @@ -0,0 +1,22 @@ +* Generic 8-bits shift register GPIO driver + +Required properties: +- compatible : Should be "fairchild,74hc595" +- reg : chip select number +- gpio-controller : Marks the device node as a gpio controller. +- #gpio-cells : Should be two. The first cell is the pin number and + the second cell is used to specify the gpio polarity: + 0 = active high + 1 = active low +- registers-number: Number of daisy-chained shift registers + +Example: + +gpio5: gpio5@0 { + compatible = "fairchild,74hc595"; + reg = <0>; + gpio-controller; + #gpio-cells = <2>; + registers-number = <4>; + spi-max-frequency = <100000>; +}; diff --git a/Documentation/devicetree/bindings/gpio/gpio-adnp.txt b/Documentation/devicetree/bindings/gpio/gpio-adnp.txt new file mode 100644 index 00000000000..af66b272483 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-adnp.txt @@ -0,0 +1,34 @@ +Avionic Design N-bit GPIO expander bindings + +Required properties: +- compatible: should be "ad,gpio-adnp" +- reg: The I2C slave address for this device. +- interrupt-parent: phandle of the parent interrupt controller. +- interrupts: Interrupt specifier for the controllers interrupt. +- #gpio-cells: Should be 2. The first cell is the GPIO number and the + second cell is used to specify optional parameters: + - bit 0: polarity (0: normal, 1: inverted) +- gpio-controller: Marks the device as a GPIO controller +- nr-gpios: The number of pins supported by the controller. + +The GPIO expander can optionally be used as an interrupt controller, in +which case it uses the default two cell specifier as described in +Documentation/devicetree/bindings/interrupt-controller/interrupts.txt. + +Example: + + gpioext: gpio-controller@41 { + compatible = "ad,gpio-adnp"; + reg = <0x41>; + + interrupt-parent = <&gpio>; + interrupts = <160 1>; + + gpio-controller; + #gpio-cells = <2>; + + interrupt-controller; + #interrupt-cells = <2>; + + nr-gpios = <64>; + }; diff --git a/Documentation/devicetree/bindings/gpio/led.txt b/Documentation/devicetree/bindings/gpio/led.txt index 9bb308abd22..edc83c1c0d5 100644 --- a/Documentation/devicetree/bindings/gpio/led.txt +++ b/Documentation/devicetree/bindings/gpio/led.txt @@ -8,7 +8,7 @@ node's name represents the name of the corresponding LED. LED sub-node properties: - gpios : Should specify the LED's GPIO, see "gpios property" in - Documentation/devicetree/gpio.txt. Active low LEDs should be + Documentation/devicetree/bindings/gpio/gpio.txt. Active low LEDs should be indicated using flags in the GPIO specifier. - label : (optional) The label for this LED. If omitted, the label is taken from the node name (excluding the unit address). diff --git a/arch/arm/configs/kzm9g_defconfig b/arch/arm/configs/kzm9g_defconfig index 5d0c6670896..c88b57886e7 100644 --- a/arch/arm/configs/kzm9g_defconfig +++ b/arch/arm/configs/kzm9g_defconfig @@ -23,7 +23,6 @@ CONFIG_MODULE_UNLOAD=y # CONFIG_IOSCHED_DEADLINE is not set # CONFIG_IOSCHED_CFQ is not set CONFIG_ARCH_SHMOBILE=y -CONFIG_KEYBOARD_GPIO_POLLED=y CONFIG_ARCH_SH73A0=y CONFIG_MACH_KZM9G=y CONFIG_MEMORY_START=0x41000000 @@ -71,6 +70,7 @@ CONFIG_INPUT_SPARSEKMAP=y # CONFIG_INPUT_MOUSEDEV is not set CONFIG_INPUT_EVDEV=y # CONFIG_KEYBOARD_ATKBD is not set +CONFIG_KEYBOARD_GPIO=y # CONFIG_INPUT_MOUSE is not set CONFIG_INPUT_TOUCHSCREEN=y CONFIG_TOUCHSCREEN_ST1232=y diff --git a/arch/arm/mach-shmobile/board-kzm9g.c b/arch/arm/mach-shmobile/board-kzm9g.c index 773a2b95a4e..0a43f3189c2 100644 --- a/arch/arm/mach-shmobile/board-kzm9g.c +++ b/arch/arm/mach-shmobile/board-kzm9g.c @@ -482,12 +482,10 @@ static struct gpio_keys_button gpio_buttons[] = { static struct gpio_keys_platform_data gpio_key_info = { .buttons = gpio_buttons, .nbuttons = ARRAY_SIZE(gpio_buttons), - .poll_interval = 250, /* poling at this point */ }; static struct platform_device gpio_keys_device = { - /* gpio-pcf857x.c driver doesn't support gpio_to_irq() */ - .name = "gpio-keys-polled", + .name = "gpio-keys", .dev = { .platform_data = &gpio_key_info, }, @@ -550,6 +548,7 @@ static struct platform_device fsi_ak4648_device = { /* I2C */ static struct pcf857x_platform_data pcf8575_pdata = { .gpio_base = GPIO_PCF8575_BASE, + .irq = intcs_evt2irq(0x3260), /* IRQ19 */ }; static struct i2c_board_info i2c0_devices[] = { diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index a00b828b164..8382dc83292 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -82,7 +82,7 @@ config GPIO_GENERIC config GPIO_DA9052 tristate "Dialog DA9052 GPIO" - depends on PMIC_DA9052 && BROKEN + depends on PMIC_DA9052 help Say yes here to enable the GPIO driver for the DA9052 chip. @@ -330,6 +330,7 @@ config GPIO_PCA953X_IRQ config GPIO_PCF857X tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" depends on I2C + select IRQ_DOMAIN help Say yes here to provide access to most "quasi-bidirectional" I2C GPIO expanders used for additional digital outputs or inputs. @@ -450,6 +451,17 @@ config GPIO_ADP5588_IRQ Say yes here to enable the adp5588 to be used as an interrupt controller. It requires the driver to be built in the kernel. +config GPIO_ADNP + tristate "Avionic Design N-bit GPIO expander" + depends on I2C && OF + help + This option enables support for N GPIOs found on Avionic Design + I2C GPIO expanders. The register space will be extended by powers + of two, so the controller will need to accomodate for that. For + example: if a controller provides 48 pins, 6 registers will be + enough to represent all pins, but the driver will assume a + register layout for 64 pins (8 registers). + comment "PCI GPIO expanders:" config GPIO_CS5535 diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index a288142ad99..0ffaa8423e8 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -10,6 +10,7 @@ obj-$(CONFIG_GPIO_GENERIC) += gpio-generic.o obj-$(CONFIG_GPIO_74X164) += gpio-74x164.o obj-$(CONFIG_GPIO_AB8500) += gpio-ab8500.o +obj-$(CONFIG_GPIO_ADNP) += gpio-adnp.o obj-$(CONFIG_GPIO_ADP5520) += gpio-adp5520.o obj-$(CONFIG_GPIO_ADP5588) += gpio-adp5588.o obj-$(CONFIG_GPIO_AMD8111) += gpio-amd8111.o diff --git a/drivers/gpio/gpio-74x164.c b/drivers/gpio/gpio-74x164.c index a31ad6f5d91..ed3e55161bd 100644 --- a/drivers/gpio/gpio-74x164.c +++ b/drivers/gpio/gpio-74x164.c @@ -14,14 +14,18 @@ #include <linux/spi/spi.h> #include <linux/spi/74x164.h> #include <linux/gpio.h> +#include <linux/of_gpio.h> #include <linux/slab.h> #include <linux/module.h> +#define GEN_74X164_NUMBER_GPIOS 8 + struct gen_74x164_chip { struct spi_device *spi; + u8 *buffer; struct gpio_chip gpio_chip; struct mutex lock; - u8 port_config; + u32 registers; }; static struct gen_74x164_chip *gpio_to_74x164_chip(struct gpio_chip *gc) @@ -31,17 +35,47 @@ static struct gen_74x164_chip *gpio_to_74x164_chip(struct gpio_chip *gc) static int __gen_74x164_write_config(struct gen_74x164_chip *chip) { - return spi_write(chip->spi, - &chip->port_config, sizeof(chip->port_config)); + struct spi_message message; + struct spi_transfer *msg_buf; + int i, ret = 0; + + msg_buf = kzalloc(chip->registers * sizeof(struct spi_transfer), + GFP_KERNEL); + if (!msg_buf) + return -ENOMEM; + + spi_message_init(&message); + + /* + * Since the registers are chained, every byte sent will make + * the previous byte shift to the next register in the + * chain. Thus, the first byte send will end up in the last + * register at the end of the transfer. So, to have a logical + * numbering, send the bytes in reverse order so that the last + * byte of the buffer will end up in the last register. + */ + for (i = chip->registers - 1; i >= 0; i--) { + msg_buf[i].tx_buf = chip->buffer +i; + msg_buf[i].len = sizeof(u8); + spi_message_add_tail(msg_buf + i, &message); + } + + ret = spi_sync(chip->spi, &message); + + kfree(msg_buf); + + return ret; } static int gen_74x164_get_value(struct gpio_chip *gc, unsigned offset) { struct gen_74x164_chip *chip = gpio_to_74x164_chip(gc); + u8 bank = offset / 8; + u8 pin = offset % 8; int ret; mutex_lock(&chip->lock); - ret = (chip->port_config >> offset) & 0x1; + ret = (chip->buffer[bank] >> pin) & 0x1; mutex_unlock(&chip->lock); return ret; @@ -51,12 +85,14 @@ static void gen_74x164_set_value(struct gpio_chip *gc, unsigned offset, int val) { struct gen_74x164_chip *chip = gpio_to_74x164_chip(gc); + u8 bank = offset / 8; + u8 pin = offset % 8; mutex_lock(&chip->lock); if (val) - chip->port_config |= (1 << offset); + chip->buffer[bank] |= (1 << pin); else - chip->port_config &= ~(1 << offset); + chip->buffer[bank] &= ~(1 << pin); __gen_74x164_write_config(chip); mutex_unlock(&chip->lock); @@ -75,9 +111,8 @@ static int __devinit gen_74x164_probe(struct spi_device *spi) struct gen_74x164_chip_platform_data *pdata; int ret; - pdata = spi->dev.platform_data; - if (!pdata || !pdata->base) { - dev_dbg(&spi->dev, "incorrect or missing platform data\n"); + if (!spi->dev.of_node) { + dev_err(&spi->dev, "No device tree data available.\n"); return -EINVAL; } @@ -90,10 +125,16 @@ static int __devinit gen_74x164_probe(struct spi_device *spi) if (ret < 0) return ret; - chip = kzalloc(sizeof(*chip), GFP_KERNEL); + chip = devm_kzalloc(&spi->dev, sizeof(*chip), GFP_KERNEL); if (!chip) return -ENOMEM; + pdata = spi->dev.platform_data; + if (pdata && pdata->base) + chip->gpio_chip.base = pdata->base; + else + chip->gpio_chip.base = -1; + mutex_init(&chip->lock); dev_set_drvdata(&spi->dev, chip); @@ -104,8 +145,20 @@ static int __devinit gen_74x164_probe(struct spi_device *spi) chip->gpio_chip.direction_output = gen_74x164_direction_output; chip->gpio_chip.get = gen_74x164_get_value; chip->gpio_chip.set = gen_74x164_set_value; - chip->gpio_chip.base = pdata->base; - chip->gpio_chip.ngpio = 8; + + if (of_property_read_u32(spi->dev.of_node, "registers-number", &chip->registers)) { + dev_err(&spi->dev, "Missing registers-number property in the DT.\n"); + ret = -EINVAL; + goto exit_destroy; + } + + chip->gpio_chip.ngpio = GEN_74X164_NUMBER_GPIOS * chip->registers; + chip->buffer = devm_kzalloc(&spi->dev, chip->gpio_chip.ngpio, GFP_KERNEL); + if (!chip->buffer) { + ret = -ENOMEM; + goto exit_destroy; + } + chip->gpio_chip.can_sleep = 1; chip->gpio_chip.dev = &spi->dev; chip->gpio_chip.owner = THIS_MODULE; @@ -125,7 +178,6 @@ static int __devinit gen_74x164_probe(struct spi_device *spi) exit_destroy: dev_set_drvdata(&spi->dev, NULL); mutex_destroy(&chip->lock); - kfree(chip); return ret; } @@ -141,36 +193,31 @@ static int __devexit gen_74x164_remove(struct spi_device *spi) dev_set_drvdata(&spi->dev, NULL); ret = gpiochip_remove(&chip->gpio_chip); - if (!ret) { + if (!ret) mutex_destroy(&chip->lock); - kfree(chip); - } else + else dev_err(&spi->dev, "Failed to remove the GPIO controller: %d\n", ret); return ret; } +static const struct of_device_id gen_74x164_dt_ids[] = { + { .compatible = "fairchild,74hc595" }, + {}, +}; +MODULE_DEVICE_TABLE(of, gen_74x164_dt_ids); + static struct spi_driver gen_74x164_driver = { .driver = { .name = "74x164", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(gen_74x164_dt_ids), }, .probe = gen_74x164_probe, .remove = __devexit_p(gen_74x164_remove), }; - -static int __init gen_74x164_init(void) -{ - return spi_register_driver(&gen_74x164_driver); -} -subsys_initcall(gen_74x164_init); - -static void __exit gen_74x164_exit(void) -{ - spi_unregister_driver(&gen_74x164_driver); -} -module_exit(gen_74x164_exit); +module_spi_driver(gen_74x164_driver); MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); MODULE_AUTHOR("Miguel Gaio <miguel.gaio@efixo.com>"); diff --git a/drivers/gpio/gpio-adnp.c b/drivers/gpio/gpio-adnp.c new file mode 100644 index 00000000000..3df88336415 --- /dev/null +++ b/drivers/gpio/gpio-adnp.c @@ -0,0 +1,611 @@ +/* + * Copyright (C) 2011-2012 Avionic Design GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/gpio.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/irqdomain.h> +#include <linux/module.h> +#include <linux/of_irq.h> +#include <linux/seq_file.h> +#include <linux/slab.h> + +#define GPIO_DDR(gpio) (0x00 << (gpio)->reg_shift) +#define GPIO_PLR(gpio) (0x01 << (gpio)->reg_shift) +#define GPIO_IER(gpio) (0x02 << (gpio)->reg_shift) +#define GPIO_ISR(gpio) (0x03 << (gpio)->reg_shift) +#define GPIO_PTR(gpio) (0x04 << (gpio)->reg_shift) + +struct adnp { + struct i2c_client *client; + struct gpio_chip gpio; + unsigned int reg_shift; + + struct mutex i2c_lock; + + struct irq_domain *domain; + struct mutex irq_lock; + + u8 *irq_enable; + u8 *irq_level; + u8 *irq_rise; + u8 *irq_fall; + u8 *irq_high; + u8 *irq_low; +}; + +static inline struct adnp *to_adnp(struct gpio_chip *chip) +{ + return container_of(chip, struct adnp, gpio); +} + +static int adnp_read(struct adnp *adnp, unsigned offset, uint8_t *value) +{ + int err; + + err = i2c_smbus_read_byte_data(adnp->client, offset); + if (err < 0) { + dev_err(adnp->gpio.dev, "%s failed: %d\n", + "i2c_smbus_read_byte_data()", err); + return err; + } + + *value = err; + return 0; +} + +static int adnp_write(struct adnp *adnp, unsigned offset, uint8_t value) +{ + int err; + + err = i2c_smbus_write_byte_data(adnp->client, offset, value); + if (err < 0) { + dev_err(adnp->gpio.dev, "%s failed: %d\n", + "i2c_smbus_write_byte_data()", err); + return err; + } + + return 0; +} + +static int adnp_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + struct adnp *adnp = to_adnp(chip); + unsigned int reg = offset >> adnp->reg_shift; + unsigned int pos = offset & 7; + u8 value; + int err; + + err = adnp_read(adnp, GPIO_PLR(adnp) + reg, &value); + if (err < 0) + return err; + + return (value & BIT(pos)) ? 1 : 0; +} + +static void __adnp_gpio_set(struct adnp *adnp, unsigned offset, int value) +{ + unsigned int reg = offset >> adnp->reg_shift; + unsigned int pos = offset & 7; + int err; + u8 val; + + err = adnp_read(adnp, GPIO_PLR(adnp) + reg, &val); + if (err < 0) + return; + + if (value) + val |= BIT(pos); + else + val &= ~BIT(pos); + + adnp_write(adnp, GPIO_PLR(adnp) + reg, val); +} + +static void adnp_gpio_set(struct gpio_chip *chip, unsigned offset, int value) +{ + struct adnp *adnp = to_adnp(chip); + + mutex_lock(&adnp->i2c_lock); + __adnp_gpio_set(adnp, offset, value); + mutex_unlock(&adnp->i2c_lock); +} + +static int adnp_gpio_direction_input(struct gpio_chip *chip, unsigned offset) +{ + struct adnp *adnp = to_adnp(chip); + unsigned int reg = offset >> adnp->reg_shift; + unsigned int pos = offset & 7; + u8 value; + int err; + + mutex_lock(&adnp->i2c_lock); + + err = adnp_read(adnp, GPIO_DDR(adnp) + reg, &value); + if (err < 0) + goto out; + + value &= ~BIT(pos); + + err = adnp_write(adnp, GPIO_DDR(adnp) + reg, value); + if (err < 0) + goto out; + + err = adnp_read(adnp, GPIO_DDR(adnp) + reg, &value); + if (err < 0) + goto out; + + if (err & BIT(pos)) + err = -EACCES; + + err = 0; + +out: + mutex_unlock(&adnp->i2c_lock); + return err; +} + +static int adnp_gpio_direction_output(struct gpio_chip *chip, unsigned offset, + int value) +{ + struct adnp *adnp = to_adnp(chip); + unsigned int reg = offset >> adnp->reg_shift; + unsigned int pos = offset & 7; + int err; + u8 val; + + mutex_lock(&adnp->i2c_lock); + + err = adnp_read(adnp, GPIO_DDR(adnp) + reg, &val); + if (err < 0) + goto out; + + val |= BIT(pos); + + err = adnp_write(adnp, GPIO_DDR(adnp) + reg, val); + if (err < 0) + goto out; + + err = adnp_read(adnp, GPIO_DDR(adnp) + reg, &val); + if (err < 0) + goto out; + + if (!(val & BIT(pos))) { + err = -EPERM; + goto out; + } + + __adnp_gpio_set(adnp, offset, value); + err = 0; + +out: + mutex_unlock(&adnp->i2c_lock); + return err; +} + +static void adnp_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) +{ + struct adnp *adnp = to_adnp(chip); + unsigned int num_regs = 1 << adnp->reg_shift, i, j; + int err; + + for (i = 0; i < num_regs; i++) { + u8 ddr, plr, ier, isr; + + mutex_lock(&adnp->i2c_lock); + + err = adnp_read(adnp, GPIO_DDR(adnp) + i, &ddr); + if (err < 0) { + mutex_unlock(&adnp->i2c_lock); + return; + } + + err = adnp_read(adnp, GPIO_PLR(adnp) + i, &plr); + if (err < 0) { + mutex_unlock(&adnp->i2c_lock); + return; + } + + err = adnp_read(adnp, GPIO_IER(adnp) + i, &ier); + if (err < 0) { + mutex_unlock(&adnp->i2c_lock); + return; + } + + err = adnp_read(adnp, GPIO_ISR(adnp) + i, &isr); + if (err < 0) { + mutex_unlock(&adnp->i2c_lock); + return; + } + + mutex_unlock(&adnp->i2c_lock); + + for (j = 0; j < 8; j++) { + unsigned int bit = (i << adnp->reg_shift) + j; + const char *direction = "input "; + const char *level = "low "; + const char *interrupt = "disabled"; + const char *pending = ""; + + if (ddr & BIT(j)) + direction = "output"; + + if (plr & BIT(j)) + level = "high"; + + if (ier & BIT(j)) + interrupt = "enabled "; + + if (isr & BIT(j)) + pending = "pending"; + + seq_printf(s, "%2u: %s %s IRQ %s %s\n", bit, + direction, level, interrupt, pending); + } + } +} + +static int adnp_gpio_setup(struct adnp *adnp, unsigned int num_gpios) +{ + struct gpio_chip *chip = &adnp->gpio; + + adnp->reg_shift = get_count_order(num_gpios) - 3; + + chip->direction_input = adnp_gpio_direction_input; + chip->direction_output = adnp_gpio_direction_output; + chip->get = adnp_gpio_get; + chip->set = adnp_gpio_set; + chip->can_sleep = 1; + + if (IS_ENABLED(CONFIG_DEBUG_FS)) + chip->dbg_show = adnp_gpio_dbg_show; + + chip->base = -1; + chip->ngpio = num_gpios; + chip->label = adnp->client->name; + chip->dev = &adnp->client->dev; + chip->of_node = chip->dev->of_node; + chip->owner = THIS_MODULE; + + return 0; +} + +static irqreturn_t adnp_irq(int irq, void *data) +{ + struct adnp *adnp = data; + unsigned int num_regs, i; + + num_regs = 1 << adnp->reg_shift; + + for (i = 0; i < num_regs; i++) { + unsigned int base = i << adnp->reg_shift, bit; + u8 changed, level, isr, ier; + unsigned long pending; + int err; + + mutex_lock(&adnp->i2c_lock); + + err = adnp_read(adnp, GPIO_PLR(adnp) + i, &level); + if (err < 0) { + mutex_unlock(&adnp->i2c_lock); + continue; + } + + err = adnp_read(adnp, GPIO_ISR(adnp) + i, &isr); + if (err < 0) { + mutex_unlock(&adnp->i2c_lock); + continue; + } + + err = adnp_read(adnp, GPIO_IER(adnp) + i, &ier); + if (err < 0) { + mutex_unlock(&adnp->i2c_lock); + continue; + } + + mutex_unlock(&adnp->i2c_lock); + + /* determine pins that changed levels */ + changed = level ^ adnp->irq_level[i]; + + /* compute edge-triggered interrupts */ + pending = changed & ((adnp->irq_fall[i] & ~level) | + (adnp->irq_rise[i] & level)); + + /* add in level-triggered interrupts */ + pending |= (adnp->irq_high[i] & level) | + (adnp->irq_low[i] & ~level); + + /* mask out non-pending and disabled interrupts */ + pending &= isr & ier; + + for_each_set_bit(bit, &pending, 8) { + unsigned int virq; + virq = irq_find_mapping(adnp->domain, base + bit); + handle_nested_irq(virq); + } + } + + return IRQ_HANDLED; +} + +static int adnp_gpio_to_irq(struct gpio_chip *chip, unsigned offset) +{ + struct adnp *adnp = to_adnp(chip); + return irq_create_mapping(adnp->domain, offset); +} + +static void adnp_irq_mask(struct irq_data *data) +{ + struct adnp *adnp = irq_data_get_irq_chip_data(data); + unsigned int reg = data->hwirq >> adnp->reg_shift; + unsigned int pos = data->hwirq & 7; + + adnp->irq_enable[reg] &= ~BIT(pos); +} + +static void adnp_irq_unmask(struct irq_data *data) +{ + struct adnp *adnp = irq_data_get_irq_chip_data(data); + unsigned int reg = data->hwirq >> adnp->reg_shift; + unsigned int pos = data->hwirq & 7; + + adnp->irq_enable[reg] |= BIT(pos); +} + +static int adnp_irq_set_type(struct irq_data *data, unsigned int type) +{ + struct adnp *adnp = irq_data_get_irq_chip_data(data); + unsigned int reg = data->hwirq >> adnp->reg_shift; + unsigned int pos = data->hwirq & 7; + + if (type & IRQ_TYPE_EDGE_RISING) + adnp->irq_rise[reg] |= BIT(pos); + else + adnp->irq_rise[reg] &= ~BIT(pos); + + if (type & IRQ_TYPE_EDGE_FALLING) + adnp->irq_fall[reg] |= BIT(pos); + else + adnp->irq_fall[reg] &= ~BIT(pos); + + if (type & IRQ_TYPE_LEVEL_HIGH) + adnp->irq_high[reg] |= BIT(pos); + else + adnp->irq_high[reg] &= ~BIT(pos); + + if (type & IRQ_TYPE_LEVEL_LOW) + adnp->irq_low[reg] |= BIT(pos); + else + adnp->irq_low[reg] &= ~BIT(pos); + + return 0; +} + +static void adnp_irq_bus_lock(struct irq_data *data) +{ + struct adnp *adnp = irq_data_get_irq_chip_data(data); + + mutex_lock(&adnp->irq_lock); +} + +static void adnp_irq_bus_unlock(struct irq_data *data) +{ + struct adnp *adnp = irq_data_get_irq_chip_data(data); + unsigned int num_regs = 1 << adnp->reg_shift, i; + + mutex_lock(&adnp->i2c_lock); + + for (i = 0; i < num_regs; i++) + adnp_write(adnp, GPIO_IER(adnp) + i, adnp->irq_enable[i]); + + mutex_unlock(&adnp->i2c_lock); + mutex_unlock(&adnp->irq_lock); +} + +static struct irq_chip adnp_irq_chip = { + .name = "gpio-adnp", + .irq_mask = adnp_irq_mask, + .irq_unmask = adnp_irq_unmask, + .irq_set_type = adnp_irq_set_type, + .irq_bus_lock = adnp_irq_bus_lock, + .irq_bus_sync_unlock = adnp_irq_bus_unlock, +}; + +static int adnp_irq_map(struct irq_domain *domain, unsigned int irq, + irq_hw_number_t hwirq) +{ + irq_set_chip_data(irq, domain->host_data); + irq_set_chip(irq, &adnp_irq_chip); + irq_set_nested_thread(irq, true); + +#ifdef CONFIG_ARM + set_irq_flags(irq, IRQF_VALID); +#else + irq_set_noprobe(irq); +#endif + + return 0; +} + +static const struct irq_domain_ops adnp_irq_domain_ops = { + .map = adnp_irq_map, + .xlate = irq_domain_xlate_twocell, +}; + +static int adnp_irq_setup(struct adnp *adnp) +{ + unsigned int num_regs = 1 << adnp->reg_shift, i; + struct gpio_chip *chip = &adnp->gpio; + int err; + + mutex_init(&adnp->irq_lock); + + /* + * Allocate memory to keep track of the current level and trigger + * modes of the interrupts. To avoid multiple allocations, a single + * large buffer is allocated and pointers are setup to point at the + * corresponding offsets. For consistency, the layout of the buffer + * is chosen to match the register layout of the hardware in that + * each segment contains the corresponding bits for all interrupts. + */ + adnp->irq_enable = devm_kzalloc(chip->dev, num_regs * 6, GFP_KERNEL); + if (!adnp->irq_enable) + return -ENOMEM; + + adnp->irq_level = adnp->irq_enable + (num_regs * 1); + adnp->irq_rise = adnp->irq_enable + (num_regs * 2); + adnp->irq_fall = adnp->irq_enable + (num_regs * 3); + adnp->irq_high = adnp->irq_enable + (num_regs * 4); + adnp->irq_low = adnp->irq_enable + (num_regs * 5); + + for (i = 0; i < num_regs; i++) { + /* + * Read the initial level of all pins to allow the emulation + * of edge triggered interrupts. + */ + err = adnp_read(adnp, GPIO_PLR(adnp) + i, &adnp->irq_level[i]); + if (err < 0) + return err; + + /* disable all interrupts */ + err = adnp_write(adnp, GPIO_IER(adnp) + i, 0); + if (err < 0) + return err; + + adnp->irq_enable[i] = 0x00; + } + + adnp->domain = irq_domain_add_linear(chip->of_node, chip->ngpio, + &adnp_irq_domain_ops, adnp); + + err = request_threaded_irq(adnp->client->irq, NULL, adnp_irq, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + dev_name(chip->dev), adnp); + if (err != 0) { + dev_err(chip->dev, "can't request IRQ#%d: %d\n", + adnp->client->irq, err); + goto error; + } + + chip->to_irq = adnp_gpio_to_irq; + return 0; + +error: + irq_domain_remove(adnp->domain); + return err; +} + +static void adnp_irq_teardown(struct adnp *adnp) +{ + unsigned int irq, i; + + free_irq(adnp->client->irq, adnp); + + for (i = 0; i < adnp->gpio.ngpio; i++) { + irq = irq_find_mapping(adnp->domain, i); + if (irq > 0) + irq_dispose_mapping(irq); + } + + irq_domain_remove(adnp->domain); +} + +static __devinit int adnp_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device_node *np = client->dev.of_node; + struct adnp *adnp; + u32 num_gpios; + int err; + + err = of_property_read_u32(np, "nr-gpios", &num_gpios); + if (err < 0) + return err; + + client->irq = irq_of_parse_and_map(np, 0); + if (!client->irq) + return -EPROBE_DEFER; + + adnp = devm_kzalloc(&client->dev, sizeof(*adnp), GFP_KERNEL); + if (!adnp) + return -ENOMEM; + + mutex_init(&adnp->i2c_lock); + adnp->client = client; + + err = adnp_gpio_setup(adnp, num_gpios); + if (err < 0) + return err; + + if (of_find_property(np, "interrupt-controller", NULL)) { + err = adnp_irq_setup(adnp); + if (err < 0) + goto teardown; + } + + err = gpiochip_add(&adnp->gpio); + if (err < 0) + goto teardown; + + i2c_set_clientdata(client, adnp); + return 0; + +teardown: + if (of_find_property(np, "interrupt-controller", NULL)) + adnp_irq_teardown(adnp); + + return err; +} + +static __devexit int adnp_i2c_remove(struct i2c_client *client) +{ + struct adnp *adnp = i2c_get_clientdata(client); + struct device_node *np = client->dev.of_node; + int err; + + err = gpiochip_remove(&adnp->gpio); + if (err < 0) { + dev_err(&client->dev, "%s failed: %d\n", "gpiochip_remove()", + err); + return err; + } + + if (of_find_property(np, "interrupt-controller", NULL)) + adnp_irq_teardown(adnp); + + return 0; +} + +static const struct i2c_device_id adnp_i2c_id[] __devinitconst = { + { "gpio-adnp" }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, adnp_i2c_id); + +static const struct of_device_id adnp_of_match[] __devinitconst = { + { .compatible = "ad,gpio-adnp", }, + { }, +}; +MODULE_DEVICE_TABLE(of, adnp_of_match); + +static struct i2c_driver adnp_i2c_driver = { + .driver = { + .name = "gpio-adnp", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(adnp_of_match), + }, + .probe = adnp_i2c_probe, + .remove = __devexit_p(adnp_i2c_remove), + .id_table = adnp_i2c_id, +}; +module_i2c_driver(adnp_i2c_driver); + +MODULE_DESCRIPTION("Avionic Design N-bit GPIO expander"); +MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpio/gpio-adp5588.c b/drivers/gpio/gpio-adp5588.c index ae5d7f12ce6..eeedad42913 100644 --- a/drivers/gpio/gpio-adp5588.c +++ b/drivers/gpio/gpio-adp5588.c @@ -483,19 +483,7 @@ static struct i2c_driver adp5588_gpio_driver = { .id_table = adp5588_gpio_id, }; -static int __init adp5588_gpio_init(void) -{ - return i2c_add_driver(&adp5588_gpio_driver); -} - -module_init(adp5588_gpio_init); - -static void __exit adp5588_gpio_exit(void) -{ - i2c_del_driver(&adp5588_gpio_driver); -} - -module_exit(adp5588_gpio_exit); +module_i2c_driver(adp5588_gpio_driver); MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); MODULE_DESCRIPTION("GPIO ADP5588 Driver"); diff --git a/drivers/gpio/gpio-bt8xx.c b/drivers/gpio/gpio-bt8xx.c index e4cc7eb69bb..aba97abda77 100644 --- a/drivers/gpio/gpio-bt8xx.c +++ b/drivers/gpio/gpio-bt8xx.c @@ -310,7 +310,7 @@ static int bt8xxgpio_resume(struct pci_dev *pdev) #define bt8xxgpio_resume NULL #endif /* CONFIG_PM */ -static struct pci_device_id bt8xxgpio_pci_tbl[] = { +static DEFINE_PCI_DEVICE_TABLE(bt8xxgpio_pci_tbl) = { { PCI_DEVICE(PCI_VENDOR_ID_BROOKTREE, PCI_DEVICE_ID_BT848) }, { PCI_DEVICE(PCI_VENDOR_ID_BROOKTREE, PCI_DEVICE_ID_BT849) }, { PCI_DEVICE(PCI_VENDOR_ID_BROOKTREE, PCI_DEVICE_ID_BT878) }, diff --git a/drivers/gpio/gpio-da9052.c b/drivers/gpio/gpio-da9052.c index 56dd047d584..24b8c297404 100644 --- a/drivers/gpio/gpio-da9052.c +++ b/drivers/gpio/gpio-da9052.c @@ -207,7 +207,7 @@ static int __devinit da9052_gpio_probe(struct platform_device *pdev) struct da9052_pdata *pdata; int ret; - gpio = kzalloc(sizeof(*gpio), GFP_KERNEL); + gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); if (gpio == NULL) return -ENOMEM; @@ -221,28 +221,19 @@ static int __devinit da9052_gpio_probe(struct platform_device *pdev) ret = gpiochip_add(&gpio->gp); if (ret < 0) { dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret); - goto err_mem; + return ret; } platform_set_drvdata(pdev, gpio); return 0; - -err_mem: - kfree(gpio); - return ret; } static int __devexit da9052_gpio_remove(struct platform_device *pdev) { struct da9052_gpio *gpio = platform_get_drvdata(pdev); - int ret; - - ret = gpiochip_remove(&gpio->gp); - if (ret == 0) - kfree(gpio); - return ret; + return gpiochip_remove(&gpio->gp); } static struct platform_driver da9052_gpio_driver = { diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c index 3d000169285..17df6db5dca 100644 --- a/drivers/gpio/gpio-davinci.c +++ b/drivers/gpio/gpio-davinci.c @@ -366,7 +366,7 @@ static int __init davinci_gpio_irq_setup(void) PTR_ERR(clk)); return PTR_ERR(clk); } - clk_enable(clk); + clk_prepare_enable(clk); /* Arrange gpio_to_irq() support, handling either direct IRQs or * banked IRQs. Having GPIOs in the first GPIO bank use direct diff --git a/drivers/gpio/gpio-em.c b/drivers/gpio/gpio-em.c index ec48ed51262..efb4c2d0d13 100644 --- a/drivers/gpio/gpio-em.c +++ b/drivers/gpio/gpio-em.c @@ -85,22 +85,16 @@ static inline void em_gio_write(struct em_gio_priv *p, int offs, iowrite32(value, p->base1 + (offs - GIO_IDT0)); } -static inline struct em_gio_priv *irq_to_priv(struct irq_data *d) -{ - struct irq_chip *chip = irq_data_get_irq_chip(d); - return container_of(chip, struct em_gio_priv, irq_chip); -} - static void em_gio_irq_disable(struct irq_data *d) { - struct em_gio_priv *p = irq_to_priv(d); + struct em_gio_priv *p = irq_data_get_irq_chip_data(d); em_gio_write(p, GIO_IDS, BIT(irqd_to_hwirq(d))); } static void em_gio_irq_enable(struct irq_data *d) { - struct em_gio_priv *p = irq_to_priv(d); + struct em_gio_priv *p = irq_data_get_irq_chip_data(d); em_gio_write(p, GIO_IEN, BIT(irqd_to_hwirq(d))); } @@ -118,7 +112,7 @@ static unsigned char em_gio_sense_table[IRQ_TYPE_SENSE_MASK + 1] = { static int em_gio_irq_set_type(struct irq_data *d, unsigned int type) { unsigned char value = em_gio_sense_table[type & IRQ_TYPE_SENSE_MASK]; - struct em_gio_priv *p = irq_to_priv(d); + struct em_gio_priv *p = irq_data_get_irq_chip_data(d); unsigned int reg, offset, shift; unsigned long flags; unsigned long tmp; diff --git a/drivers/gpio/gpio-lpc32xx.c b/drivers/gpio/gpio-lpc32xx.c index ed94b4ea72e..3644e0dcb3d 100644 --- a/drivers/gpio/gpio-lpc32xx.c +++ b/drivers/gpio/gpio-lpc32xx.c @@ -113,7 +113,8 @@ static const char *gpi_p3_names[LPC32XX_GPI_P3_MAX] = { NULL, NULL, NULL, "gpi15", "gpi16", "gpi17", "gpi18", "gpi19", "gpi20", "gpi21", "gpi22", "gpi23", - "gpi24", "gpi25", "gpi26", "gpi27" + "gpi24", "gpi25", "gpi26", "gpi27", + "gpi28" }; static const char *gpo_p3_names[LPC32XX_GPO_P3_MAX] = { diff --git a/drivers/gpio/gpio-mc9s08dz60.c b/drivers/gpio/gpio-mc9s08dz60.c index 2738cc44d63..0ab700046a2 100644 --- a/drivers/gpio/gpio-mc9s08dz60.c +++ b/drivers/gpio/gpio-mc9s08dz60.c @@ -91,10 +91,9 @@ static int mc9s08dz60_direction_output(struct gpio_chip *gc, static int mc9s08dz60_probe(struct i2c_client *client, const struct i2c_device_id *id) { - int ret = 0; struct mc9s08dz60 *mc9s; - mc9s = kzalloc(sizeof(*mc9s), GFP_KERNEL); + mc9s = devm_kzalloc(&client->dev, sizeof(*mc9s), GFP_KERNEL); if (!mc9s) return -ENOMEM; @@ -110,30 +109,16 @@ static int mc9s08dz60_probe(struct i2c_client *client, mc9s->client = client; i2c_set_clientdata(client, mc9s); - ret = gpiochip_add(&mc9s->chip); - if (ret) - goto error; - - return 0; - - error: - kfree(mc9s); - return ret; + return gpiochip_add(&mc9s->chip); } static int mc9s08dz60_remove(struct i2c_client *client) { struct mc9s08dz60 *mc9s; - int ret; mc9s = i2c_get_clientdata(client); - ret = gpiochip_remove(&mc9s->chip); - if (!ret) - kfree(mc9s); - - return ret; - + return gpiochip_remove(&mc9s->chip); } static const struct i2c_device_id mc9s08dz60_id[] = { diff --git a/drivers/gpio/gpio-ml-ioh.c b/drivers/gpio/gpio-ml-ioh.c index db01f151d41..6a29ee1847b 100644 --- a/drivers/gpio/gpio-ml-ioh.c +++ b/drivers/gpio/gpio-ml-ioh.c @@ -87,8 +87,7 @@ struct ioh_gpio_reg_data { * @gpio_use_sel: Save GPIO_USE_SEL1~4 register for PM * @ch: Indicate GPIO channel * @irq_base: Save base of IRQ number for interrupt - * @spinlock: Used for register access protection in - * interrupt context ioh_irq_type and PM; + * @spinlock: Used for register access protection */ struct ioh_gpio { void __iomem *base; @@ -97,7 +96,6 @@ struct ioh_gpio { struct gpio_chip gpio; struct ioh_gpio_reg_data ioh_gpio_reg; u32 gpio_use_sel; - struct mutex lock; int ch; int irq_base; spinlock_t spinlock; @@ -109,8 +107,9 @@ static void ioh_gpio_set(struct gpio_chip *gpio, unsigned nr, int val) { u32 reg_val; struct ioh_gpio *chip = container_of(gpio, struct ioh_gpio, gpio); + unsigned long flags; - mutex_lock(&chip->lock); + spin_lock_irqsave(&chip->spinlock, flags); reg_val = ioread32(&chip->reg->regs[chip->ch].po); if (val) reg_val |= (1 << nr); @@ -118,7 +117,7 @@ static void ioh_gpio_set(struct gpio_chip *gpio, unsigned nr, int val) reg_val &= ~(1 << nr); iowrite32(reg_val, &chip->reg->regs[chip->ch].po); - mutex_unlock(&chip->lock); + spin_unlock_irqrestore(&chip->spinlock, flags); } static int ioh_gpio_get(struct gpio_chip *gpio, unsigned nr) @@ -134,8 +133,9 @@ static int ioh_gpio_direction_output(struct gpio_chip *gpio, unsigned nr, struct ioh_gpio *chip = container_of(gpio, struct ioh_gpio, gpio); u32 pm; u32 reg_val; + unsigned long flags; - mutex_lock(&chip->lock); + spin_lock_irqsave(&chip->spinlock, flags); pm = ioread32(&chip->reg->regs[chip->ch].pm) & ((1 << num_ports[chip->ch]) - 1); pm |= (1 << nr); @@ -148,7 +148,7 @@ static int ioh_gpio_direction_output(struct gpio_chip *gpio, unsigned nr, reg_val &= ~(1 << nr); iowrite32(reg_val, &chip->reg->regs[chip->ch].po); - mutex_unlock(&chip->lock); + spin_unlock_irqrestore(&chip->spinlock, flags); return 0; } @@ -157,13 +157,14 @@ static int ioh_gpio_direction_input(struct gpio_chip *gpio, unsigned nr) { struct ioh_gpio *chip = container_of(gpio, struct ioh_gpio, gpio); u32 pm; + unsigned long flags; - mutex_lock(&chip->lock); + spin_lock_irqsave(&chip->spinlock, flags); pm = ioread32(&chip->reg->regs[chip->ch].pm) & ((1 << num_ports[chip->ch]) - 1); pm &= ~(1 << nr); iowrite32(pm, &chip->reg->regs[chip->ch].pm); - mutex_unlock(&chip->lock); + spin_unlock_irqrestore(&chip->spinlock, flags); return 0; } @@ -447,7 +448,6 @@ static int __devinit ioh_gpio_probe(struct pci_dev *pdev, chip->base = base; chip->reg = chip->base; chip->ch = i; - mutex_init(&chip->lock); spin_lock_init(&chip->spinlock); ioh_gpio_setup(chip, num_ports[i]); ret = gpiochip_add(&chip->gpio); diff --git a/drivers/gpio/gpio-msm-v2.c b/drivers/gpio/gpio-msm-v2.c index 5cb1227d69c..38305beb437 100644 --- a/drivers/gpio/gpio-msm-v2.c +++ b/drivers/gpio/gpio-msm-v2.c @@ -317,9 +317,7 @@ static void msm_summary_irq_handler(unsigned int irq, struct irq_desc *desc) chained_irq_enter(chip, desc); - for (i = find_first_bit(msm_gpio.enabled_irqs, NR_GPIO_IRQS); - i < NR_GPIO_IRQS; - i = find_next_bit(msm_gpio.enabled_irqs, NR_GPIO_IRQS, i + 1)) { + for_each_set_bit(i, msm_gpio.enabled_irqs, NR_GPIO_IRQS) { if (readl(GPIO_INTR_STATUS(i)) & BIT(INTR_STATUS)) generic_handle_irq(msm_gpio_to_irq(&msm_gpio.gpio_chip, i)); diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c index 076e236d0da..16af35cd2b1 100644 --- a/drivers/gpio/gpio-pcf857x.c +++ b/drivers/gpio/gpio-pcf857x.c @@ -23,7 +23,12 @@ #include <linux/gpio.h> #include <linux/i2c.h> #include <linux/i2c/pcf857x.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/irqdomain.h> #include <linux/module.h> +#include <linux/spinlock.h> +#include <linux/workqueue.h> static const struct i2c_device_id pcf857x_id[] = { @@ -60,7 +65,12 @@ struct pcf857x { struct gpio_chip chip; struct i2c_client *client; struct mutex lock; /* protect 'out' */ + struct work_struct work; /* irq demux work */ + struct irq_domain *irq_domain; /* for irq demux */ + spinlock_t slock; /* protect irq demux */ unsigned out; /* software latch */ + unsigned status; /* current status */ + int irq; /* real irq number */ int (*write)(struct i2c_client *client, unsigned data); int (*read)(struct i2c_client *client); @@ -150,6 +160,100 @@ static void pcf857x_set(struct gpio_chip *chip, unsigned offset, int value) /*-------------------------------------------------------------------------*/ +static int pcf857x_to_irq(struct gpio_chip *chip, unsigned offset) +{ + struct pcf857x *gpio = container_of(chip, struct pcf857x, chip); + + return irq_create_mapping(gpio->irq_domain, offset); +} + +static void pcf857x_irq_demux_work(struct work_struct *work) +{ + struct pcf857x *gpio = container_of(work, + struct pcf857x, + work); + unsigned long change, i, status, flags; + + status = gpio->read(gpio->client); + + spin_lock_irqsave(&gpio->slock, flags); + + change = gpio->status ^ status; + for_each_set_bit(i, &change, gpio->chip.ngpio) + generic_handle_irq(irq_find_mapping(gpio->irq_domain, i)); + gpio->status = status; + + spin_unlock_irqrestore(&gpio->slock, flags); +} + +static irqreturn_t pcf857x_irq_demux(int irq, void *data) +{ + struct pcf857x *gpio = data; + + /* + * pcf857x can't read/write data here, + * since i2c data access might go to sleep. + */ + schedule_work(&gpio->work); + + return IRQ_HANDLED; +} + +static int pcf857x_irq_domain_map(struct irq_domain *domain, unsigned int virq, + irq_hw_number_t hw) +{ + irq_set_chip_and_handler(virq, + &dummy_irq_chip, + handle_level_irq); + return 0; +} + +static struct irq_domain_ops pcf857x_irq_domain_ops = { + .map = pcf857x_irq_domain_map, +}; + +static void pcf857x_irq_domain_cleanup(struct pcf857x *gpio) +{ + if (gpio->irq_domain) + irq_domain_remove(gpio->irq_domain); + + if (gpio->irq) + free_irq(gpio->irq, gpio); +} + +static int pcf857x_irq_domain_init(struct pcf857x *gpio, + struct pcf857x_platform_data *pdata, + struct device *dev) +{ + int status; + + gpio->irq_domain = irq_domain_add_linear(dev->of_node, + gpio->chip.ngpio, + &pcf857x_irq_domain_ops, + NULL); + if (!gpio->irq_domain) + goto fail; + + /* enable real irq */ + status = request_irq(pdata->irq, pcf857x_irq_demux, 0, + dev_name(dev), gpio); + if (status) + goto fail; + + /* enable gpio_to_irq() */ + INIT_WORK(&gpio->work, pcf857x_irq_demux_work); + gpio->chip.to_irq = pcf857x_to_irq; + gpio->irq = pdata->irq; + + return 0; + +fail: + pcf857x_irq_domain_cleanup(gpio); + return -EINVAL; +} + +/*-------------------------------------------------------------------------*/ + static int pcf857x_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -168,6 +272,7 @@ static int pcf857x_probe(struct i2c_client *client, return -ENOMEM; mutex_init(&gpio->lock); + spin_lock_init(&gpio->slock); gpio->chip.base = pdata ? pdata->gpio_base : -1; gpio->chip.can_sleep = 1; @@ -179,6 +284,15 @@ static int pcf857x_probe(struct i2c_client *client, gpio->chip.direction_output = pcf857x_output; gpio->chip.ngpio = id->driver_data; + /* enable gpio_to_irq() if platform has settings */ + if (pdata && pdata->irq) { + status = pcf857x_irq_domain_init(gpio, pdata, &client->dev); + if (status < 0) { + dev_err(&client->dev, "irq_domain init failed\n"); + goto fail; + } + } + /* NOTE: the OnSemi jlc1562b is also largely compatible with * these parts, notably for output. It has a low-resolution * DAC instead of pin change IRQs; and its inputs can be the @@ -248,6 +362,7 @@ static int pcf857x_probe(struct i2c_client *client, * all-ones reset state. Otherwise it flags pins to be driven low. */ gpio->out = pdata ? ~pdata->n_latch : ~0; + gpio->status = gpio->out; status = gpiochip_add(&gpio->chip); if (status < 0) @@ -278,6 +393,10 @@ static int pcf857x_probe(struct i2c_client *client, fail: dev_dbg(&client->dev, "probe error %d for '%s'\n", status, client->name); + + if (pdata && pdata->irq) + pcf857x_irq_domain_cleanup(gpio); + kfree(gpio); return status; } @@ -299,6 +418,9 @@ static int pcf857x_remove(struct i2c_client *client) } } + if (pdata && pdata->irq) + pcf857x_irq_domain_cleanup(gpio); + status = gpiochip_remove(&gpio->chip); if (status == 0) kfree(gpio); diff --git a/drivers/gpio/gpio-pch.c b/drivers/gpio/gpio-pch.c index 139ad3e2001..4ad0c4f9171 100644 --- a/drivers/gpio/gpio-pch.c +++ b/drivers/gpio/gpio-pch.c @@ -92,9 +92,7 @@ struct pch_gpio_reg_data { * @lock: Used for register access protection * @irq_base: Save base of IRQ number for interrupt * @ioh: IOH ID - * @spinlock: Used for register access protection in - * interrupt context pch_irq_mask, - * pch_irq_unmask and pch_irq_type; + * @spinlock: Used for register access protection */ struct pch_gpio { void __iomem *base; @@ -102,7 +100,6 @@ struct pch_gpio { struct device *dev; struct gpio_chip gpio; struct pch_gpio_reg_data pch_gpio_reg; - struct mutex lock; int irq_base; enum pch_type_t ioh; spinlock_t spinlock; @@ -112,8 +109,9 @@ static void pch_gpio_set(struct gpio_chip *gpio, unsigned nr, int val) { u32 reg_val; struct pch_gpio *chip = container_of(gpio, struct pch_gpio, gpio); + unsigned long flags; - mutex_lock(&chip->lock); + spin_lock_irqsave(&chip->spinlock, flags); reg_val = ioread32(&chip->reg->po); if (val) reg_val |= (1 << nr); @@ -121,7 +119,7 @@ static void pch_gpio_set(struct gpio_chip *gpio, unsigned nr, int val) reg_val &= ~(1 << nr); iowrite32(reg_val, &chip->reg->po); - mutex_unlock(&chip->lock); + spin_unlock_irqrestore(&chip->spinlock, flags); } static int pch_gpio_get(struct gpio_chip *gpio, unsigned nr) @@ -137,8 +135,9 @@ static int pch_gpio_direction_output(struct gpio_chip *gpio, unsigned nr, struct pch_gpio *chip = container_of(gpio, struct pch_gpio, gpio); u32 pm; u32 reg_val; + unsigned long flags; - mutex_lock(&chip->lock); + spin_lock_irqsave(&chip->spinlock, flags); pm = ioread32(&chip->reg->pm) & ((1 << gpio_pins[chip->ioh]) - 1); pm |= (1 << nr); iowrite32(pm, &chip->reg->pm); @@ -149,8 +148,7 @@ static int pch_gpio_direction_output(struct gpio_chip *gpio, unsigned nr, else reg_val &= ~(1 << nr); iowrite32(reg_val, &chip->reg->po); - - mutex_unlock(&chip->lock); + spin_unlock_irqrestore(&chip->spinlock, flags); return 0; } @@ -159,12 +157,13 @@ static int pch_gpio_direction_input(struct gpio_chip *gpio, unsigned nr) { struct pch_gpio *chip = container_of(gpio, struct pch_gpio, gpio); u32 pm; + unsigned long flags; - mutex_lock(&chip->lock); + spin_lock_irqsave(&chip->spinlock, flags); pm = ioread32(&chip->reg->pm) & ((1 << gpio_pins[chip->ioh]) - 1); pm &= ~(1 << nr); iowrite32(pm, &chip->reg->pm); - mutex_unlock(&chip->lock); + spin_unlock_irqrestore(&chip->spinlock, flags); return 0; } @@ -387,7 +386,6 @@ static int __devinit pch_gpio_probe(struct pci_dev *pdev, chip->reg = chip->base; pci_set_drvdata(pdev, chip); - mutex_init(&chip->lock); spin_lock_init(&chip->spinlock); pch_gpio_setup(chip); ret = gpiochip_add(&chip->gpio); diff --git a/drivers/gpio/gpio-pxa.c b/drivers/gpio/gpio-pxa.c index 9528779ca46..98d52cb3fd1 100644 --- a/drivers/gpio/gpio-pxa.c +++ b/drivers/gpio/gpio-pxa.c @@ -370,12 +370,10 @@ static void pxa_gpio_demux_handler(unsigned int irq, struct irq_desc *desc) gedr = gedr & c->irq_mask; writel_relaxed(gedr, c->regbase + GEDR_OFFSET); - n = find_first_bit(&gedr, BITS_PER_LONG); - while (n < BITS_PER_LONG) { + for_each_set_bit(n, &gedr, BITS_PER_LONG) { loop = 1; generic_handle_irq(gpio_to_irq(gpio_base + n)); - n = find_next_bit(&gedr, BITS_PER_LONG, n + 1); } } } while (loop); @@ -589,19 +587,12 @@ static int __devinit pxa_gpio_probe(struct platform_device *pdev) iounmap(gpio_reg_base); return PTR_ERR(clk); } - ret = clk_prepare(clk); + ret = clk_prepare_enable(clk); if (ret) { clk_put(clk); iounmap(gpio_reg_base); return ret; } - ret = clk_enable(clk); - if (ret) { - clk_unprepare(clk); - clk_put(clk); - iounmap(gpio_reg_base); - return ret; - } /* Initialize GPIO chips */ info = dev_get_platdata(&pdev->dev); diff --git a/drivers/gpio/gpio-sodaville.c b/drivers/gpio/gpio-sodaville.c index 9d9891f7a60..e25f73130b4 100644 --- a/drivers/gpio/gpio-sodaville.c +++ b/drivers/gpio/gpio-sodaville.c @@ -270,7 +270,7 @@ static void sdv_gpio_remove(struct pci_dev *pdev) kfree(sd); } -static struct pci_device_id sdv_gpio_pci_ids[] __devinitdata = { +static DEFINE_PCI_DEVICE_TABLE(sdv_gpio_pci_ids) = { { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_SDV_GPIO) }, { 0, }, }; diff --git a/drivers/gpio/gpio-sx150x.c b/drivers/gpio/gpio-sx150x.c index a4f73534394..eb3e215d239 100644 --- a/drivers/gpio/gpio-sx150x.c +++ b/drivers/gpio/gpio-sx150x.c @@ -311,11 +311,9 @@ static int sx150x_gpio_to_irq(struct gpio_chip *gc, unsigned offset) static void sx150x_irq_mask(struct irq_data *d) { - struct irq_chip *ic = irq_data_get_irq_chip(d); - struct sx150x_chip *chip; + struct sx150x_chip *chip = irq_data_get_irq_chip_data(d); unsigned n; - chip = container_of(ic, struct sx150x_chip, irq_chip); n = d->irq - chip->irq_base; chip->irq_masked |= (1 << n); chip->irq_update = n; @@ -323,27 +321,22 @@ static void sx150x_irq_mask(struct irq_data *d) static void sx150x_irq_unmask(struct irq_data *d) { - struct irq_chip *ic = irq_data_get_irq_chip(d); - struct sx150x_chip *chip; + struct sx150x_chip *chip = irq_data_get_irq_chip_data(d); unsigned n; - chip = container_of(ic, struct sx150x_chip, irq_chip); n = d->irq - chip->irq_base; - chip->irq_masked &= ~(1 << n); chip->irq_update = n; } static int sx150x_irq_set_type(struct irq_data *d, unsigned int flow_type) { - struct irq_chip *ic = irq_data_get_irq_chip(d); - struct sx150x_chip *chip; + struct sx150x_chip *chip = irq_data_get_irq_chip_data(d); unsigned n, val = 0; if (flow_type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) return -EINVAL; - chip = container_of(ic, struct sx150x_chip, irq_chip); n = d->irq - chip->irq_base; if (flow_type & IRQ_TYPE_EDGE_RISING) @@ -391,22 +384,16 @@ static irqreturn_t sx150x_irq_thread_fn(int irq, void *dev_id) static void sx150x_irq_bus_lock(struct irq_data *d) { - struct irq_chip *ic = irq_data_get_irq_chip(d); - struct sx150x_chip *chip; - - chip = container_of(ic, struct sx150x_chip, irq_chip); + struct sx150x_chip *chip = irq_data_get_irq_chip_data(d); mutex_lock(&chip->lock); } static void sx150x_irq_bus_sync_unlock(struct irq_data *d) { - struct irq_chip *ic = irq_data_get_irq_chip(d); - struct sx150x_chip *chip; + struct sx150x_chip *chip = irq_data_get_irq_chip_data(d); unsigned n; - chip = container_of(ic, struct sx150x_chip, irq_chip); - if (chip->irq_update == NO_UPDATE_PENDING) goto out; @@ -551,6 +538,7 @@ static int sx150x_install_irq_chip(struct sx150x_chip *chip, for (n = 0; n < chip->dev_cfg->ngpios; ++n) { irq = irq_base + n; + irq_set_chip_data(irq, chip); irq_set_chip_and_handler(irq, &chip->irq_chip, handle_edge_irq); irq_set_nested_thread(irq, 1); #ifdef CONFIG_ARM diff --git a/drivers/gpio/gpio-tc3589x.c b/drivers/gpio/gpio-tc3589x.c index 2a82e8999a4..1e48317e70f 100644 --- a/drivers/gpio/gpio-tc3589x.c +++ b/drivers/gpio/gpio-tc3589x.c @@ -11,7 +11,9 @@ #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/gpio.h> +#include <linux/of.h> #include <linux/irq.h> +#include <linux/irqdomain.h> #include <linux/interrupt.h> #include <linux/mfd/tc3589x.h> @@ -29,6 +31,7 @@ struct tc3589x_gpio { struct tc3589x *tc3589x; struct device *dev; struct mutex irq_lock; + struct irq_domain *domain; int irq_base; @@ -92,11 +95,28 @@ static int tc3589x_gpio_direction_input(struct gpio_chip *chip, return tc3589x_set_bits(tc3589x, reg, 1 << pos, 0); } +/** + * tc3589x_gpio_irq_get_virq(): Map an interrupt on a chip to a virtual IRQ + * + * @tc3589x_gpio: tc3589x_gpio_irq controller to operate on. + * @irq: index of the interrupt requested in the chip IRQs + * + * Useful for drivers to request their own IRQs. + */ +static int tc3589x_gpio_irq_get_virq(struct tc3589x_gpio *tc3589x_gpio, + int irq) +{ + if (!tc3589x_gpio) + return -EINVAL; + + return irq_create_mapping(tc3589x_gpio->domain, irq); +} + static int tc3589x_gpio_to_irq(struct gpio_chip *chip, unsigned offset) { struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip); - return tc3589x_gpio->irq_base + offset; + return tc3589x_gpio_irq_get_virq(tc3589x_gpio, offset); } static struct gpio_chip template_chip = { @@ -113,7 +133,7 @@ static struct gpio_chip template_chip = { static int tc3589x_gpio_irq_set_type(struct irq_data *d, unsigned int type) { struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d); - int offset = d->irq - tc3589x_gpio->irq_base; + int offset = d->hwirq; int regoffset = offset / 8; int mask = 1 << (offset % 8); @@ -175,7 +195,7 @@ static void tc3589x_gpio_irq_sync_unlock(struct irq_data *d) static void tc3589x_gpio_irq_mask(struct irq_data *d) { struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d); - int offset = d->irq - tc3589x_gpio->irq_base; + int offset = d->hwirq; int regoffset = offset / 8; int mask = 1 << (offset % 8); @@ -185,7 +205,7 @@ static void tc3589x_gpio_irq_mask(struct irq_data *d) static void tc3589x_gpio_irq_unmask(struct irq_data *d) { struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d); - int offset = d->irq - tc3589x_gpio->irq_base; + int offset = d->hwirq; int regoffset = offset / 8; int mask = 1 << (offset % 8); @@ -222,8 +242,9 @@ static irqreturn_t tc3589x_gpio_irq(int irq, void *dev) while (stat) { int bit = __ffs(stat); int line = i * 8 + bit; + int virq = tc3589x_gpio_irq_get_virq(tc3589x_gpio, line); - handle_nested_irq(tc3589x_gpio->irq_base + line); + handle_nested_irq(virq); stat &= ~(1 << bit); } @@ -233,51 +254,78 @@ static irqreturn_t tc3589x_gpio_irq(int irq, void *dev) return IRQ_HANDLED; } -static int tc3589x_gpio_irq_init(struct tc3589x_gpio *tc3589x_gpio) +static int tc3589x_gpio_irq_map(struct irq_domain *d, unsigned int virq, + irq_hw_number_t hwirq) { - int base = tc3589x_gpio->irq_base; - int irq; + struct tc3589x *tc3589x_gpio = d->host_data; - for (irq = base; irq < base + tc3589x_gpio->chip.ngpio; irq++) { - irq_set_chip_data(irq, tc3589x_gpio); - irq_set_chip_and_handler(irq, &tc3589x_gpio_irq_chip, - handle_simple_irq); - irq_set_nested_thread(irq, 1); + irq_set_chip_data(virq, tc3589x_gpio); + irq_set_chip_and_handler(virq, &tc3589x_gpio_irq_chip, + handle_simple_irq); + irq_set_nested_thread(virq, 1); #ifdef CONFIG_ARM - set_irq_flags(irq, IRQF_VALID); + set_irq_flags(virq, IRQF_VALID); #else - irq_set_noprobe(irq); + irq_set_noprobe(virq); #endif - } return 0; } -static void tc3589x_gpio_irq_remove(struct tc3589x_gpio *tc3589x_gpio) +static void tc3589x_gpio_irq_unmap(struct irq_domain *d, unsigned int virq) { - int base = tc3589x_gpio->irq_base; - int irq; - - for (irq = base; irq < base + tc3589x_gpio->chip.ngpio; irq++) { #ifdef CONFIG_ARM - set_irq_flags(irq, 0); + set_irq_flags(virq, 0); #endif - irq_set_chip_and_handler(irq, NULL, NULL); - irq_set_chip_data(irq, NULL); + irq_set_chip_and_handler(virq, NULL, NULL); + irq_set_chip_data(virq, NULL); +} + +static struct irq_domain_ops tc3589x_irq_ops = { + .map = tc3589x_gpio_irq_map, + .unmap = tc3589x_gpio_irq_unmap, + .xlate = irq_domain_xlate_twocell, +}; + +static int tc3589x_gpio_irq_init(struct tc3589x_gpio *tc3589x_gpio, + struct device_node *np) +{ + int base = tc3589x_gpio->irq_base; + + if (base) { + tc3589x_gpio->domain = irq_domain_add_legacy( + NULL, tc3589x_gpio->chip.ngpio, base, + 0, &tc3589x_irq_ops, tc3589x_gpio); + } + else { + tc3589x_gpio->domain = irq_domain_add_linear( + np, tc3589x_gpio->chip.ngpio, + &tc3589x_irq_ops, tc3589x_gpio); + } + + if (!tc3589x_gpio->domain) { + dev_err(tc3589x_gpio->dev, "Failed to create irqdomain\n"); + return -ENOSYS; } + + return 0; } static int __devinit tc3589x_gpio_probe(struct platform_device *pdev) { struct tc3589x *tc3589x = dev_get_drvdata(pdev->dev.parent); struct tc3589x_gpio_platform_data *pdata; + struct device_node *np = pdev->dev.of_node; struct tc3589x_gpio *tc3589x_gpio; int ret; int irq; pdata = tc3589x->pdata->gpio; - if (!pdata) - return -ENODEV; + + if (!(pdata || np)) { + dev_err(&pdev->dev, "No platform data or Device Tree found\n"); + return -EINVAL; + } irq = platform_get_irq(pdev, 0); if (irq < 0) @@ -295,9 +343,14 @@ static int __devinit tc3589x_gpio_probe(struct platform_device *pdev) tc3589x_gpio->chip = template_chip; tc3589x_gpio->chip.ngpio = tc3589x->num_gpio; tc3589x_gpio->chip.dev = &pdev->dev; - tc3589x_gpio->chip.base = pdata->gpio_base; + tc3589x_gpio->chip.base = (pdata) ? pdata->gpio_base : -1; - tc3589x_gpio->irq_base = tc3589x->irq_base + TC3589x_INT_GPIO(0); +#ifdef CONFIG_OF_GPIO + tc3589x_gpio->chip.of_node = np; +#endif + + tc3589x_gpio->irq_base = tc3589x->irq_base ? + tc3589x->irq_base + TC3589x_INT_GPIO(0) : 0; /* Bring the GPIO module out of reset */ ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL, @@ -305,7 +358,7 @@ static int __devinit tc3589x_gpio_probe(struct platform_device *pdev) if (ret < 0) goto out_free; - ret = tc3589x_gpio_irq_init(tc3589x_gpio); + ret = tc3589x_gpio_irq_init(tc3589x_gpio, np); if (ret) goto out_free; @@ -313,7 +366,7 @@ static int __devinit tc3589x_gpio_probe(struct platform_device *pdev) "tc3589x-gpio", tc3589x_gpio); if (ret) { dev_err(&pdev->dev, "unable to get irq: %d\n", ret); - goto out_removeirq; + goto out_free; } ret = gpiochip_add(&tc3589x_gpio->chip); @@ -322,7 +375,7 @@ static int __devinit tc3589x_gpio_probe(struct platform_device *pdev) goto out_freeirq; } - if (pdata->setup) + if (pdata && pdata->setup) pdata->setup(tc3589x, tc3589x_gpio->chip.base); platform_set_drvdata(pdev, tc3589x_gpio); @@ -331,8 +384,6 @@ static int __devinit tc3589x_gpio_probe(struct platform_device *pdev) out_freeirq: free_irq(irq, tc3589x_gpio); -out_removeirq: - tc3589x_gpio_irq_remove(tc3589x_gpio); out_free: kfree(tc3589x_gpio); return ret; @@ -346,7 +397,7 @@ static int __devexit tc3589x_gpio_remove(struct platform_device *pdev) int irq = platform_get_irq(pdev, 0); int ret; - if (pdata->remove) + if (pdata && pdata->remove) pdata->remove(tc3589x, tc3589x_gpio->chip.base); ret = gpiochip_remove(&tc3589x_gpio->chip); @@ -357,7 +408,6 @@ static int __devexit tc3589x_gpio_remove(struct platform_device *pdev) } free_irq(irq, tc3589x_gpio); - tc3589x_gpio_irq_remove(tc3589x_gpio); platform_set_drvdata(pdev, NULL); kfree(tc3589x_gpio); diff --git a/drivers/gpio/gpio-tps65912.c b/drivers/gpio/gpio-tps65912.c index 79e66c00235..99106d1e2e5 100644 --- a/drivers/gpio/gpio-tps65912.c +++ b/drivers/gpio/gpio-tps65912.c @@ -70,7 +70,6 @@ static int tps65912_gpio_input(struct gpio_chip *gc, unsigned offset) return tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset, GPIO_CFG_MASK); - } static struct gpio_chip template_chip = { @@ -92,7 +91,8 @@ static int __devinit tps65912_gpio_probe(struct platform_device *pdev) struct tps65912_gpio_data *tps65912_gpio; int ret; - tps65912_gpio = kzalloc(sizeof(*tps65912_gpio), GFP_KERNEL); + tps65912_gpio = devm_kzalloc(&pdev->dev, sizeof(*tps65912_gpio), + GFP_KERNEL); if (tps65912_gpio == NULL) return -ENOMEM; @@ -105,28 +105,19 @@ static int __devinit tps65912_gpio_probe(struct platform_device *pdev) ret = gpiochip_add(&tps65912_gpio->gpio_chip); if (ret < 0) { dev_err(&pdev->dev, "Failed to register gpiochip, %d\n", ret); - goto err; + return ret; } platform_set_drvdata(pdev, tps65912_gpio); return ret; - -err: - kfree(tps65912_gpio); - return ret; } static int __devexit tps65912_gpio_remove(struct platform_device *pdev) { struct tps65912_gpio_data *tps65912_gpio = platform_get_drvdata(pdev); - int ret; - - ret = gpiochip_remove(&tps65912_gpio->gpio_chip); - if (ret == 0) - kfree(tps65912_gpio); - return ret; + return gpiochip_remove(&tps65912_gpio->gpio_chip); } static struct platform_driver tps65912_gpio_driver = { diff --git a/drivers/gpio/gpio-wm831x.c b/drivers/gpio/gpio-wm831x.c index e56a2165641..b6eda35089d 100644 --- a/drivers/gpio/gpio-wm831x.c +++ b/drivers/gpio/gpio-wm831x.c @@ -250,7 +250,8 @@ static int __devinit wm831x_gpio_probe(struct platform_device *pdev) struct wm831x_gpio *wm831x_gpio; int ret; - wm831x_gpio = kzalloc(sizeof(*wm831x_gpio), GFP_KERNEL); + wm831x_gpio = devm_kzalloc(&pdev->dev, sizeof(*wm831x_gpio), + GFP_KERNEL); if (wm831x_gpio == NULL) return -ENOMEM; @@ -265,30 +266,20 @@ static int __devinit wm831x_gpio_probe(struct platform_device *pdev) ret = gpiochip_add(&wm831x_gpio->gpio_chip); if (ret < 0) { - dev_err(&pdev->dev, "Could not register gpiochip, %d\n", - ret); - goto err; + dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret); + return ret; } platform_set_drvdata(pdev, wm831x_gpio); return ret; - -err: - kfree(wm831x_gpio); - return ret; } static int __devexit wm831x_gpio_remove(struct platform_device *pdev) { struct wm831x_gpio *wm831x_gpio = platform_get_drvdata(pdev); - int ret; - - ret = gpiochip_remove(&wm831x_gpio->gpio_chip); - if (ret == 0) - kfree(wm831x_gpio); - return ret; + return gpiochip_remove(&wm831x_gpio->gpio_chip); } static struct platform_driver wm831x_gpio_driver = { diff --git a/drivers/gpio/gpio-wm8350.c b/drivers/gpio/gpio-wm8350.c index a06af515483..fb429388939 100644 --- a/drivers/gpio/gpio-wm8350.c +++ b/drivers/gpio/gpio-wm8350.c @@ -116,7 +116,8 @@ static int __devinit wm8350_gpio_probe(struct platform_device *pdev) struct wm8350_gpio_data *wm8350_gpio; int ret; - wm8350_gpio = kzalloc(sizeof(*wm8350_gpio), GFP_KERNEL); + wm8350_gpio = devm_kzalloc(&pdev->dev, sizeof(*wm8350_gpio), + GFP_KERNEL); if (wm8350_gpio == NULL) return -ENOMEM; @@ -131,30 +132,20 @@ static int __devinit wm8350_gpio_probe(struct platform_device *pdev) ret = gpiochip_add(&wm8350_gpio->gpio_chip); if (ret < 0) { - dev_err(&pdev->dev, "Could not register gpiochip, %d\n", - ret); - goto err; + dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret); + return ret; } platform_set_drvdata(pdev, wm8350_gpio); return ret; - -err: - kfree(wm8350_gpio); - return ret; } static int __devexit wm8350_gpio_remove(struct platform_device *pdev) { struct wm8350_gpio_data *wm8350_gpio = platform_get_drvdata(pdev); - int ret; - - ret = gpiochip_remove(&wm8350_gpio->gpio_chip); - if (ret == 0) - kfree(wm8350_gpio); - return ret; + return gpiochip_remove(&wm8350_gpio->gpio_chip); } static struct platform_driver wm8350_gpio_driver = { diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index de0213c9d11..5d6c71edc73 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1773,56 +1773,102 @@ static void gpiolib_dbg_show(struct seq_file *s, struct gpio_chip *chip) } } -static int gpiolib_show(struct seq_file *s, void *unused) +static void *gpiolib_seq_start(struct seq_file *s, loff_t *pos) { - struct gpio_chip *chip = NULL; - unsigned gpio; - int started = 0; + struct gpio_chip *chip = NULL; + unsigned int gpio; + void *ret = NULL; + loff_t index = 0; /* REVISIT this isn't locked against gpio_chip removal ... */ for (gpio = 0; gpio_is_valid(gpio); gpio++) { - struct device *dev; - - if (chip == gpio_desc[gpio].chip) + if (gpio_desc[gpio].chip == chip) continue; + chip = gpio_desc[gpio].chip; if (!chip) continue; - seq_printf(s, "%sGPIOs %d-%d", - started ? "\n" : "", - chip->base, chip->base + chip->ngpio - 1); - dev = chip->dev; - if (dev) - seq_printf(s, ", %s/%s", - dev->bus ? dev->bus->name : "no-bus", - dev_name(dev)); - if (chip->label) - seq_printf(s, ", %s", chip->label); - if (chip->can_sleep) - seq_printf(s, ", can sleep"); - seq_printf(s, ":\n"); + if (index++ >= *pos) { + ret = chip; + break; + } + } + + s->private = ""; - started = 1; - if (chip->dbg_show) - chip->dbg_show(s, chip); - else - gpiolib_dbg_show(s, chip); + return ret; +} + +static void *gpiolib_seq_next(struct seq_file *s, void *v, loff_t *pos) +{ + struct gpio_chip *chip = v; + unsigned int gpio; + void *ret = NULL; + + /* skip GPIOs provided by the current chip */ + for (gpio = chip->base + chip->ngpio; gpio_is_valid(gpio); gpio++) { + chip = gpio_desc[gpio].chip; + if (chip) { + ret = chip; + break; + } } + + s->private = "\n"; + ++*pos; + + return ret; +} + +static void gpiolib_seq_stop(struct seq_file *s, void *v) +{ +} + +static int gpiolib_seq_show(struct seq_file *s, void *v) +{ + struct gpio_chip *chip = v; + struct device *dev; + + seq_printf(s, "%sGPIOs %d-%d", (char *)s->private, + chip->base, chip->base + chip->ngpio - 1); + dev = chip->dev; + if (dev) + seq_printf(s, ", %s/%s", dev->bus ? dev->bus->name : "no-bus", + dev_name(dev)); + if (chip->label) + seq_printf(s, ", %s", chip->label); + if (chip->can_sleep) + seq_printf(s, ", can sleep"); + seq_printf(s, ":\n"); + + if (chip->dbg_show) + chip->dbg_show(s, chip); + else + gpiolib_dbg_show(s, chip); + return 0; } +static const struct seq_operations gpiolib_seq_ops = { + .start = gpiolib_seq_start, + .next = gpiolib_seq_next, + .stop = gpiolib_seq_stop, + .show = gpiolib_seq_show, +}; + static int gpiolib_open(struct inode *inode, struct file *file) { - return single_open(file, gpiolib_show, NULL); + return seq_open(file, &gpiolib_seq_ops); } static const struct file_operations gpiolib_operations = { + .owner = THIS_MODULE, .open = gpiolib_open, .read = seq_read, .llseek = seq_lseek, - .release = single_release, + .release = seq_release, }; static int __init gpiolib_debugfs_init(void) diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index 365ea09ed3b..a9432fc6b8b 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -60,6 +60,8 @@ struct device_node; * @get: returns value for signal "offset"; for output signals this * returns either the value actually sensed, or zero * @direction_output: configures signal "offset" as output, or returns error + * @set_debounce: optional hook for setting debounce time for specified gpio in + * interrupt triggered gpio chips * @set: assigns output value for signal "offset" * @to_irq: optional hook supporting non-static gpio_to_irq() mappings; * implementation may not sleep diff --git a/include/linux/i2c/pcf857x.h b/include/linux/i2c/pcf857x.h index 0767a2a6b2f..781e6bd06c3 100644 --- a/include/linux/i2c/pcf857x.h +++ b/include/linux/i2c/pcf857x.h @@ -10,6 +10,7 @@ * @setup: optional callback issued once the GPIOs are valid * @teardown: optional callback issued before the GPIOs are invalidated * @context: optional parameter passed to setup() and teardown() + * @irq: optional interrupt number * * In addition to the I2C_BOARD_INFO() state appropriate to each chip, * the i2c_board_info used with the pcf875x driver must provide its @@ -39,6 +40,8 @@ struct pcf857x_platform_data { int gpio, unsigned ngpio, void *context); void *context; + + int irq; }; #endif /* __LINUX_PCF857X_H */ |