linux-kernel - [PATCH v28 12/15] leds: lp5523: Update the lp5523 code to add multicolor brightness function

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Message-ID: <20200617150924.12665-13-dmurphy@ti.com>
Date:   Wed, 17 Jun 2020 10:09:21 -0500
From:   Dan Murphy <dmurphy@...com>
To:     <jacek.anaszewski@...il.com>, <pavel@....cz>, <robh@...nel.org>
CC:     <devicetree@...r.kernel.org>, <linux-leds@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Dan Murphy <dmurphy@...com>
Subject: [PATCH v28 12/15] leds: lp5523: Update the lp5523 code to add multicolor brightness function

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

Acked-by: Pavel Machek <pavel@....cz>
Acked-by: Jacek Anaszewski <jacek.anaszewski@...il.com>
Signed-off-by: Dan Murphy <dmurphy@...com>
---
 drivers/leds/Kconfig       |  1 +
 drivers/leds/leds-lp5523.c | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 04e0cb39f92e..44d8b2293436 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -418,6 +418,7 @@ config LEDS_LP5521
 config LEDS_LP5523
 	tristate "LED Support for TI/National LP5523/55231 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 TI/National Semiconductor
diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
index b076c16df9ab..9776dc72a764 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_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,
+				   LP5523_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 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,
+	.multicolor_brightness_fn = lp5523_multicolor_brightness,
 	.set_led_current    = lp5523_set_led_current,
 	.firmware_cb        = lp5523_firmware_loaded,
 	.run_engine         = lp5523_run_engine,
-- 
2.26.2