diff options
Diffstat (limited to 'drivers/gpio/gpio-twl4030.c')
| -rw-r--r-- | drivers/gpio/gpio-twl4030.c | 43 |
1 files changed, 22 insertions, 21 deletions
diff --git a/drivers/gpio/gpio-twl4030.c b/drivers/gpio/gpio-twl4030.c index c5f8ca233e1..00329f2fc05 100644 --- a/drivers/gpio/gpio-twl4030.c +++ b/drivers/gpio/gpio-twl4030.c @@ -88,11 +88,15 @@ static inline int gpio_twl4030_write(u8 address, u8 data) /*----------------------------------------------------------------------*/ /* - * LED register offsets (use TWL4030_MODULE_{LED,PWMA,PWMB})) + * LED register offsets from TWL_MODULE_LED base * PWMs A and B are dedicated to LEDs A and B, respectively. */ -#define TWL4030_LED_LEDEN 0x0 +#define TWL4030_LED_LEDEN_REG 0x00 +#define TWL4030_PWMAON_REG 0x01 +#define TWL4030_PWMAOFF_REG 0x02 +#define TWL4030_PWMBON_REG 0x03 +#define TWL4030_PWMBOFF_REG 0x04 /* LEDEN bits */ #define LEDEN_LEDAON BIT(0) @@ -104,9 +108,6 @@ static inline int gpio_twl4030_write(u8 address, u8 data) #define LEDEN_PWM_LENGTHA BIT(6) #define LEDEN_PWM_LENGTHB BIT(7) -#define TWL4030_PWMx_PWMxON 0x0 -#define TWL4030_PWMx_PWMxOFF 0x1 - #define PWMxON_LENGTH BIT(7) /*----------------------------------------------------------------------*/ @@ -145,7 +146,7 @@ static void twl4030_led_set_value(int led, int value) else cached_leden |= mask; status = twl_i2c_write_u8(TWL4030_MODULE_LED, cached_leden, - TWL4030_LED_LEDEN); + TWL4030_LED_LEDEN_REG); mutex_unlock(&gpio_lock); } @@ -216,33 +217,33 @@ static int twl_request(struct gpio_chip *chip, unsigned offset) if (offset >= TWL4030_GPIO_MAX) { u8 ledclr_mask = LEDEN_LEDAON | LEDEN_LEDAEXT | LEDEN_LEDAPWM | LEDEN_PWM_LENGTHA; - u8 module = TWL4030_MODULE_PWMA; + u8 reg = TWL4030_PWMAON_REG; offset -= TWL4030_GPIO_MAX; if (offset) { ledclr_mask <<= 1; - module = TWL4030_MODULE_PWMB; + reg = TWL4030_PWMBON_REG; } /* initialize PWM to always-drive */ - status = twl_i2c_write_u8(module, 0x7f, - TWL4030_PWMx_PWMxOFF); + /* Configure PWM OFF register first */ + status = twl_i2c_write_u8(TWL4030_MODULE_LED, 0x7f, reg + 1); if (status < 0) goto done; - status = twl_i2c_write_u8(module, 0x7f, - TWL4030_PWMx_PWMxON); + + /* Followed by PWM ON register */ + status = twl_i2c_write_u8(TWL4030_MODULE_LED, 0x7f, reg); if (status < 0) goto done; /* init LED to not-driven (high) */ - module = TWL4030_MODULE_LED; - status = twl_i2c_read_u8(module, &cached_leden, - TWL4030_LED_LEDEN); + status = twl_i2c_read_u8(TWL4030_MODULE_LED, &cached_leden, + TWL4030_LED_LEDEN_REG); if (status < 0) goto done; cached_leden &= ~ledclr_mask; - status = twl_i2c_write_u8(module, cached_leden, - TWL4030_LED_LEDEN); + status = twl_i2c_write_u8(TWL4030_MODULE_LED, cached_leden, + TWL4030_LED_LEDEN_REG); if (status < 0) goto done; @@ -352,7 +353,7 @@ static struct gpio_chip twl_gpiochip = { /*----------------------------------------------------------------------*/ -static int __devinit gpio_twl4030_pulls(u32 ups, u32 downs) +static int gpio_twl4030_pulls(u32 ups, u32 downs) { u8 message[6]; unsigned i, gpio_bit; @@ -377,7 +378,7 @@ static int __devinit gpio_twl4030_pulls(u32 ups, u32 downs) REG_GPIOPUPDCTR1, 5); } -static int __devinit gpio_twl4030_debounce(u32 debounce, u8 mmc_cd) +static int gpio_twl4030_debounce(u32 debounce, u8 mmc_cd) { u8 message[4]; @@ -419,7 +420,7 @@ static struct twl4030_gpio_platform_data *of_gpio_twl4030(struct device *dev) return omap_twl_info; } -static int __devinit gpio_twl4030_probe(struct platform_device *pdev) +static int gpio_twl4030_probe(struct platform_device *pdev) { struct twl4030_gpio_platform_data *pdata = pdev->dev.platform_data; struct device_node *node = pdev->dev.of_node; @@ -505,7 +506,7 @@ out: return ret; } -/* Cannot use __devexit as gpio_twl4030_probe() calls us */ +/* Cannot use as gpio_twl4030_probe() calls us */ static int gpio_twl4030_remove(struct platform_device *pdev) { struct twl4030_gpio_platform_data *pdata = pdev->dev.platform_data; |