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[v27,13/15] leds: lp5521: Add multicolor framework multicolor brightness support

Message ID 20200608193917.13084-14-dmurphy@ti.com
State Superseded
Headers show
Series Multicolor Framework v27 | expand

Commit Message

Dan Murphy June 8, 2020, 7:39 p.m. UTC 
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 <pavel@ucw.cz>

Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>

Signed-off-by: Dan Murphy <dmurphy@ti.com>

---
 drivers/leds/Kconfig       |  1 +
 drivers/leds/leds-lp5521.c | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+)

-- 
2.26.2
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Patch

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 869b299a9eed..4970bbde6ea3 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,