[PATCH v25 13/16] leds: lp5521: Add multicolor framework multicolor brightness support

[Dan Murphy]

Add the multicolor brightness call back to support the multicolor
framework. This function allows setting the brightness across
grouped LED channels in a single call.

Acked-by: Pavel Machek <pa...@ucw.cz>
Acked-by: Jacek Anaszewski <jacek.anaszew...@gmail.com>
Signed-off-by: Dan Murphy <dmur...@ti.com>
---
 drivers/leds/Kconfig       |  1 +
 drivers/leds/leds-lp5521.c | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 8b28f73c810c..bdf8fc2652fb 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -398,6 +398,7 @@ config LEDS_LP55XX_COMMON
 config LEDS_LP5521
        tristate "LED Support for N.S. LP5521 LED driver chip"
        depends on LEDS_CLASS && I2C
+       depends on LEDS_CLASS_MULTI_COLOR || !LEDS_CLASS_MULTI_COLOR
        select LEDS_LP55XX_COMMON
        help
          If you say yes here you get support for the National Semiconductor
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
index 6ff81d6be789..ef8c3bfa8f3c 100644
--- a/drivers/leds/leds-lp5521.c
+++ b/drivers/leds/leds-lp5521.c
@@ -349,6 +349,25 @@ static int lp5521_run_selftest(struct lp55xx_chip *chip, 
char *buf)
        return 0;
 }
 
+static int lp5521_multicolor_brightness(struct lp55xx_led *led)
+{
+       struct lp55xx_chip *chip = led->chip;
+       int ret;
+       int i;
+
+       mutex_lock(&chip->lock);
+       for (i = 0; i < led->mc_cdev.num_colors; i++) {
+               ret = lp55xx_write(chip,
+                                  LP5521_REG_LED_PWM_BASE +
+                                  led->mc_cdev.subled_info[i].channel,
+                                  led->mc_cdev.subled_info[i].brightness);
+               if (ret)
+                       break;
+       }
+       mutex_unlock(&chip->lock);
+       return ret;
+}
+
 static int lp5521_led_brightness(struct lp55xx_led *led)
 {
        struct lp55xx_chip *chip = led->chip;
@@ -490,6 +509,7 @@ static struct lp55xx_device_config lp5521_cfg = {
        .max_channel  = LP5521_MAX_LEDS,
        .post_init_device   = lp5521_post_init_device,
        .brightness_fn      = lp5521_led_brightness,
+       .multicolor_brightness_fn = lp5521_multicolor_brightness,
        .set_led_current    = lp5521_set_led_current,
        .firmware_cb        = lp5521_firmware_loaded,
        .run_engine         = lp5521_run_engine,
-- 
2.25.1