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| author | Axel Lin <axel.lin@gmail.com> | 2012-07-24 14:29:47 +0800 |
|---|---|---|
| committer | Bryan Wu <bryan.wu@canonical.com> | 2012-07-24 15:48:47 +0800 |
| commit | eb18618b8018bffad6e62f1bc40e4e0c7ee2fa19 (patch) | |
| tree | 724aafc2a5a3a8766a4e468714c2479b1fed10fb /drivers/leds/leds-max8997.c | |
| parent | 5ecf6e40bbb8649b8418c8038a2af1faefbc56e4 (diff) | |
| download | talos-obmc-linux-eb18618b8018bffad6e62f1bc40e4e0c7ee2fa19.tar.gz talos-obmc-linux-eb18618b8018bffad6e62f1bc40e4e0c7ee2fa19.zip | |
leds: max8997: Simplify max8997_led_set_mode implementation
It is not necessary to call max8997_update_reg() twice just for updating
MAX8997_REG_LEN_CNTL register. With proper val and mask arguments to
max8997_update_reg() call, this can be done in one max8997_update_reg() call.
And then we can remove max8997_led_clear_mode() function.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
Diffstat (limited to 'drivers/leds/leds-max8997.c')
| -rw-r--r-- | drivers/leds/leds-max8997.c | 60 |
1 files changed, 13 insertions, 47 deletions
diff --git a/drivers/leds/leds-max8997.c b/drivers/leds/leds-max8997.c index bf86d5483f43..569e36de37df 100644 --- a/drivers/leds/leds-max8997.c +++ b/drivers/leds/leds-max8997.c @@ -49,71 +49,37 @@ struct max8997_led { struct mutex mutex; }; -static void max8997_led_clear_mode(struct max8997_led *led, - enum max8997_led_mode mode) -{ - struct i2c_client *client = led->iodev->i2c; - u8 val = 0, mask = 0; - int ret; - - switch (mode) { - case MAX8997_FLASH_MODE: - mask = led->id ? - MAX8997_LED1_FLASH_MASK : MAX8997_LED0_FLASH_MASK; - break; - case MAX8997_MOVIE_MODE: - mask = led->id ? - MAX8997_LED1_MOVIE_MASK : MAX8997_LED0_MOVIE_MASK; - break; - case MAX8997_FLASH_PIN_CONTROL_MODE: - mask = led->id ? - MAX8997_LED1_FLASH_PIN_MASK : MAX8997_LED0_FLASH_PIN_MASK; - break; - case MAX8997_MOVIE_PIN_CONTROL_MODE: - mask = led->id ? - MAX8997_LED1_MOVIE_PIN_MASK : MAX8997_LED0_MOVIE_PIN_MASK; - break; - default: - break; - } - - if (mask) { - ret = max8997_update_reg(client, - MAX8997_REG_LEN_CNTL, val, mask); - if (ret) - dev_err(led->iodev->dev, - "failed to update register(%d)\n", ret); - } -} - static void max8997_led_set_mode(struct max8997_led *led, enum max8997_led_mode mode) { int ret; struct i2c_client *client = led->iodev->i2c; - u8 mask = 0; - - /* First, clear the previous mode */ - max8997_led_clear_mode(led, led->led_mode); + u8 mask = 0, val; switch (mode) { case MAX8997_FLASH_MODE: - mask = led->id ? + mask = MAX8997_LED1_FLASH_MASK | MAX8997_LED0_FLASH_MASK; + val = led->id ? MAX8997_LED1_FLASH_MASK : MAX8997_LED0_FLASH_MASK; led->cdev.max_brightness = MAX8997_LED_FLASH_MAX_BRIGHTNESS; break; case MAX8997_MOVIE_MODE: - mask = led->id ? + mask = MAX8997_LED1_MOVIE_MASK | MAX8997_LED0_MOVIE_MASK; + val = led->id ? MAX8997_LED1_MOVIE_MASK : MAX8997_LED0_MOVIE_MASK; led->cdev.max_brightness = MAX8997_LED_MOVIE_MAX_BRIGHTNESS; break; case MAX8997_FLASH_PIN_CONTROL_MODE: - mask = led->id ? + mask = MAX8997_LED1_FLASH_PIN_MASK | + MAX8997_LED0_FLASH_PIN_MASK; + val = led->id ? MAX8997_LED1_FLASH_PIN_MASK : MAX8997_LED0_FLASH_PIN_MASK; led->cdev.max_brightness = MAX8997_LED_FLASH_MAX_BRIGHTNESS; break; case MAX8997_MOVIE_PIN_CONTROL_MODE: - mask = led->id ? + mask = MAX8997_LED1_MOVIE_PIN_MASK | + MAX8997_LED0_MOVIE_PIN_MASK; + val = led->id ? MAX8997_LED1_MOVIE_PIN_MASK : MAX8997_LED0_MOVIE_PIN_MASK; led->cdev.max_brightness = MAX8997_LED_MOVIE_MAX_BRIGHTNESS; break; @@ -123,8 +89,8 @@ static void max8997_led_set_mode(struct max8997_led *led, } if (mask) { - ret = max8997_update_reg(client, - MAX8997_REG_LEN_CNTL, mask, mask); + ret = max8997_update_reg(client, MAX8997_REG_LEN_CNTL, val, + mask); if (ret) dev_err(led->iodev->dev, "failed to update register(%d)\n", ret); |
