[PATCH v11 13/16] leds: lp5523: Update the lp5523 code to add intensity function

[Dan Murphy <dmurphy@ti.com>]

Add the intensity function call back to support the multicolor
framework.  This function allows setting a specific brightness on
a specific channel.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
 drivers/leds/leds-lp5523.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
index d0b931a136b9..5d6002e4d657 100644
--- a/drivers/leds/leds-lp5523.c
+++ b/drivers/leds/leds-lp5523.c
@@ -791,6 +791,25 @@ static ssize_t store_master_fader_leds(struct device *dev,
 	return ret;
 }
 
+static int lp5523_led_intensity(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_leds; i++) {
+		ret = lp55xx_write(chip,
+				   LP5523_REG_LED_PWM_BASE +
+				   led->color_component[i].output_num,
+				   led->color_component[i].brightness);
+		if (ret)
+			break;
+	}
+	mutex_unlock(&chip->lock);
+	return ret;
+}
+
 static int lp5523_led_brightness(struct lp55xx_led *led)
 {
 	struct lp55xx_chip *chip = led->chip;
@@ -857,6 +876,7 @@ static struct lp55xx_device_config lp5523_cfg = {
 	.max_channel  = LP5523_MAX_LEDS,
 	.post_init_device   = lp5523_post_init_device,
 	.brightness_fn      = lp5523_led_brightness,
+	.color_intensity_fn = lp5523_led_intensity,
 	.set_led_current    = lp5523_set_led_current,
 	.firmware_cb        = lp5523_firmware_loaded,
 	.run_engine         = lp5523_run_engine,
-- 
2.22.0.214.g8dca754b1e