diff options
Diffstat (limited to 'arch/arm/plat-omap/i2c.c')
| -rw-r--r-- | arch/arm/plat-omap/i2c.c | 126 |
1 files changed, 56 insertions, 70 deletions
diff --git a/arch/arm/plat-omap/i2c.c b/arch/arm/plat-omap/i2c.c index a5ce4f0aad3..a4f8003de66 100644 --- a/arch/arm/plat-omap/i2c.c +++ b/arch/arm/plat-omap/i2c.c @@ -27,20 +27,20 @@ #include <linux/platform_device.h> #include <linux/i2c.h> #include <linux/i2c-omap.h> +#include <linux/slab.h> +#include <linux/err.h> +#include <linux/clk.h> #include <mach/irqs.h> #include <plat/mux.h> #include <plat/i2c.h> #include <plat/omap-pm.h> +#include <plat/omap_device.h> #define OMAP_I2C_SIZE 0x3f #define OMAP1_I2C_BASE 0xfffb3800 -#define OMAP2_I2C_BASE1 0x48070000 -#define OMAP2_I2C_BASE2 0x48072000 -#define OMAP2_I2C_BASE3 0x48060000 -#define OMAP4_I2C_BASE4 0x48350000 -static const char name[] = "i2c_omap"; +static const char name[] = "omap_i2c"; #define I2C_RESOURCE_BUILDER(base, irq) \ { \ @@ -55,15 +55,6 @@ static const char name[] = "i2c_omap"; static struct resource i2c_resources[][2] = { { I2C_RESOURCE_BUILDER(0, 0) }, -#if defined(CONFIG_ARCH_OMAP2PLUS) - { I2C_RESOURCE_BUILDER(OMAP2_I2C_BASE2, 0) }, -#endif -#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4) - { I2C_RESOURCE_BUILDER(OMAP2_I2C_BASE3, 0) }, -#endif -#if defined(CONFIG_ARCH_OMAP4) - { I2C_RESOURCE_BUILDER(OMAP4_I2C_BASE4, 0) }, -#endif }; #define I2C_DEV_BUILDER(bus_id, res, data) \ @@ -77,18 +68,11 @@ static struct resource i2c_resources[][2] = { }, \ } -static struct omap_i2c_bus_platform_data i2c_pdata[ARRAY_SIZE(i2c_resources)]; +#define MAX_OMAP_I2C_HWMOD_NAME_LEN 16 +#define OMAP_I2C_MAX_CONTROLLERS 4 +static struct omap_i2c_bus_platform_data i2c_pdata[OMAP_I2C_MAX_CONTROLLERS]; static struct platform_device omap_i2c_devices[] = { I2C_DEV_BUILDER(1, i2c_resources[0], &i2c_pdata[0]), -#if defined(CONFIG_ARCH_OMAP2PLUS) - I2C_DEV_BUILDER(2, i2c_resources[1], &i2c_pdata[1]), -#endif -#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4) - I2C_DEV_BUILDER(3, i2c_resources[2], &i2c_pdata[2]), -#endif -#if defined(CONFIG_ARCH_OMAP4) - I2C_DEV_BUILDER(4, i2c_resources[3], &i2c_pdata[3]), -#endif }; #define OMAP_I2C_CMDLINE_SETUP (BIT(31)) @@ -109,35 +93,25 @@ static int __init omap_i2c_nr_ports(void) return ports; } -/* Shared between omap2 and 3 */ -static resource_size_t omap2_i2c_irq[3] __initdata = { - INT_24XX_I2C1_IRQ, - INT_24XX_I2C2_IRQ, - INT_34XX_I2C3_IRQ, -}; - -static resource_size_t omap4_i2c_irq[4] __initdata = { - OMAP44XX_IRQ_I2C1, - OMAP44XX_IRQ_I2C2, - OMAP44XX_IRQ_I2C3, - OMAP44XX_IRQ_I2C4, -}; - -static inline int omap1_i2c_add_bus(struct platform_device *pdev, int bus_id) +static inline int omap1_i2c_add_bus(int bus_id) { - struct omap_i2c_bus_platform_data *pd; + struct platform_device *pdev; + struct omap_i2c_bus_platform_data *pdata; struct resource *res; - pd = pdev->dev.platform_data; + omap1_i2c_mux_pins(bus_id); + + pdev = &omap_i2c_devices[bus_id - 1]; res = pdev->resource; res[0].start = OMAP1_I2C_BASE; res[0].end = res[0].start + OMAP_I2C_SIZE; res[1].start = INT_I2C; - omap1_i2c_mux_pins(bus_id); + pdata = &i2c_pdata[bus_id - 1]; return platform_device_register(pdev); } + /* * XXX This function is a temporary compatibility wrapper - only * needed until the I2C driver can be converted to call @@ -148,52 +122,64 @@ static void omap_pm_set_max_mpu_wakeup_lat_compat(struct device *dev, long t) omap_pm_set_max_mpu_wakeup_lat(dev, t); } -static inline int omap2_i2c_add_bus(struct platform_device *pdev, int bus_id) -{ - struct resource *res; - resource_size_t *irq; +static struct omap_device_pm_latency omap_i2c_latency[] = { + [0] = { + .deactivate_func = omap_device_idle_hwmods, + .activate_func = omap_device_enable_hwmods, + .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST, + }, +}; - res = pdev->resource; +#ifdef CONFIG_ARCH_OMAP2PLUS +static inline int omap2_i2c_add_bus(int bus_id) +{ + int l; + struct omap_hwmod *oh; + struct omap_device *od; + char oh_name[MAX_OMAP_I2C_HWMOD_NAME_LEN]; + struct omap_i2c_bus_platform_data *pdata; - if (!cpu_is_omap44xx()) - irq = omap2_i2c_irq; - else - irq = omap4_i2c_irq; + omap2_i2c_mux_pins(bus_id); - if (bus_id == 1) { - res[0].start = OMAP2_I2C_BASE1; - res[0].end = res[0].start + OMAP_I2C_SIZE; + l = snprintf(oh_name, MAX_OMAP_I2C_HWMOD_NAME_LEN, "i2c%d", bus_id); + WARN(l >= MAX_OMAP_I2C_HWMOD_NAME_LEN, + "String buffer overflow in I2C%d device setup\n", bus_id); + oh = omap_hwmod_lookup(oh_name); + if (!oh) { + pr_err("Could not look up %s\n", oh_name); + return -EEXIST; } - res[1].start = irq[bus_id - 1]; - omap2_i2c_mux_pins(bus_id); - + pdata = &i2c_pdata[bus_id - 1]; /* * When waiting for completion of a i2c transfer, we need to * set a wake up latency constraint for the MPU. This is to * ensure quick enough wakeup from idle, when transfer * completes. + * Only omap3 has support for constraints */ - if (cpu_is_omap34xx()) { - struct omap_i2c_bus_platform_data *pd; - - pd = pdev->dev.platform_data; - pd->set_mpu_wkup_lat = omap_pm_set_max_mpu_wakeup_lat_compat; - } + if (cpu_is_omap34xx()) + pdata->set_mpu_wkup_lat = omap_pm_set_max_mpu_wakeup_lat_compat; + od = omap_device_build(name, bus_id, oh, pdata, + sizeof(struct omap_i2c_bus_platform_data), + omap_i2c_latency, ARRAY_SIZE(omap_i2c_latency), 0); + WARN(IS_ERR(od), "Could not build omap_device for %s\n", name); - return platform_device_register(pdev); + return PTR_ERR(od); } +#else +static inline int omap2_i2c_add_bus(int bus_id) +{ + return 0; +} +#endif static int __init omap_i2c_add_bus(int bus_id) { - struct platform_device *pdev; - - pdev = &omap_i2c_devices[bus_id - 1]; - if (cpu_class_is_omap1()) - return omap1_i2c_add_bus(pdev, bus_id); + return omap1_i2c_add_bus(bus_id); else - return omap2_i2c_add_bus(pdev, bus_id); + return omap2_i2c_add_bus(bus_id); } /** |