linux-kernel - [PATCH v31 09/12] leds: lp5521: Add multicolor framework multicolor brightness support

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Message-ID: <20200716182007.18389-10-dmurphy@ti.com>
Date:   Thu, 16 Jul 2020 13:20:04 -0500
From:   Dan Murphy <dmurphy@...com>
To:     <jacek.anaszewski@...il.com>, <pavel@....cz>, <robh@...nel.org>,
        <marek.behun@....cz>
CC:     <devicetree@...r.kernel.org>, <linux-leds@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, Dan Murphy <dmurphy@...com>
Subject: [PATCH v31 09/12] leds: lp5521: Add multicolor framework multicolor brightness support

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@....cz>
Acked-by: Jacek Anaszewski <jacek.anaszewski@...il.com>
Signed-off-by: Dan Murphy <dmurphy@...com>
---
 drivers/leds/leds-lp5521.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

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,
-- 
2.27.0