[PATCH v3 2/2] leds: ktd2692: Make aux-gpios optional

From: Markuss Broks
Date: Thu Apr 07 2022 - 07:51:51 EST


Make the AUX pin optional, since it isn't a core part of functionality,
and the device is designed to be operational with only one CTRL pin.

Also pick up maintainership for the LED driver and the yaml bindings.

Signed-off-by: Markuss Broks <markuss.broks@xxxxxxxxx>
---
MAINTAINERS | 6 ++++++
drivers/leds/flash/leds-ktd2692.c | 16 ++++++++++------
2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index 2db49ea7ae55..8ef5667a1d98 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10479,6 +10479,12 @@ S: Maintained
F: Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml
F: drivers/video/backlight/ktd253-backlight.c

+KTD2692 FLASH LED DRIVER
+M: Markuss Broks <markuss.broks@xxxxxxxxx>
+S: Maintained
+F: Documentation/devicetree/bindings/leds/backlight/kinetic,ktd2692.yaml
+F: drivers/leds/flash/leds-ktd2692.yaml
+
KTEST
M: Steven Rostedt <rostedt@xxxxxxxxxxx>
M: John Hawley <warthog9@xxxxxxxxxxxxxx>
diff --git a/drivers/leds/flash/leds-ktd2692.c b/drivers/leds/flash/leds-ktd2692.c
index f341da1503a4..bfbe1d5f7b8e 100644
--- a/drivers/leds/flash/leds-ktd2692.c
+++ b/drivers/leds/flash/leds-ktd2692.c
@@ -163,7 +163,8 @@ static int ktd2692_led_brightness_set(struct led_classdev *led_cdev,

if (brightness == LED_OFF) {
led->mode = KTD2692_MODE_DISABLE;
- gpiod_direction_output(led->aux_gpio, KTD2692_LOW);
+ if (led->aux_gpio)
+ gpiod_direction_output(led->aux_gpio, KTD2692_LOW);
} else {
ktd2692_expresswire_write(led, brightness |
KTD2692_REG_MOVIE_CURRENT_BASE);
@@ -191,10 +192,12 @@ static int ktd2692_led_flash_strobe_set(struct led_classdev_flash *fled_cdev,
| KTD2692_REG_FLASH_TIMEOUT_BASE);

led->mode = KTD2692_MODE_FLASH;
- gpiod_direction_output(led->aux_gpio, KTD2692_HIGH);
+ if (led->aux_gpio)
+ gpiod_direction_output(led->aux_gpio, KTD2692_HIGH);
} else {
led->mode = KTD2692_MODE_DISABLE;
- gpiod_direction_output(led->aux_gpio, KTD2692_LOW);
+ if (led->aux_gpio)
+ gpiod_direction_output(led->aux_gpio, KTD2692_LOW);
}

ktd2692_expresswire_write(led, led->mode | KTD2692_REG_MODE_BASE);
@@ -248,7 +251,8 @@ static void ktd2692_setup(struct ktd2692_context *led)
{
led->mode = KTD2692_MODE_DISABLE;
ktd2692_expresswire_reset(led);
- gpiod_direction_output(led->aux_gpio, KTD2692_LOW);
+ if (led->aux_gpio)
+ gpiod_direction_output(led->aux_gpio, KTD2692_LOW);

ktd2692_expresswire_write(led, (KTD2692_MM_MIN_CURR_THRESHOLD_SCALE - 1)
| KTD2692_REG_MM_MIN_CURR_THRESHOLD_BASE);
@@ -287,8 +291,8 @@ static int ktd2692_parse_dt(struct ktd2692_context *led, struct device *dev,
led->aux_gpio = devm_gpiod_get(dev, "aux", GPIOD_ASIS);
ret = PTR_ERR_OR_ZERO(led->aux_gpio);
if (ret) {
- dev_err(dev, "cannot get aux-gpios %d\n", ret);
- return ret;
+ dev_info(dev, "aux-gpios not available, flash mode current might be reduced\n");
+ led->aux_gpio = NULL;
}

led->regulator = devm_regulator_get(dev, "vin");
--
2.35.1