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- From 183148e0789bee1cd5c46ba49afcb211f636f8a2 Mon Sep 17 00:00:00 2001
- From: Gabor Juhos <juhosg@freemail.hu>
- Date: Mon, 15 Jan 2018 15:01:14 +0100
- Subject: [PATCH] leds: gpio: allow to use OPEN_{DRAIN,SOURCE} flags with
- legacy GPIOs
- LEDs which are connected to open-source or open-drain type of GPIO lines
- can be used only, if those are defined via devicetree.
- Add two new fields to 'struct gpio_led' in order to make it possible to
- specify this type of GPIO lines to the leds-gpio driver via platform data.
- Also update the create_gpio_led() function to set the GPIOF_OPEN_DRAIN and
- GPIOF_OPEN_SOURCE flags for the given GPIO line.
- Signed-off-by: Gabor Juhos <juhosg@freemail.hu>
- ---
- drivers/leds/leds-gpio.c | 6 ++++++
- include/linux/leds.h | 2 ++
- 2 files changed, 8 insertions(+)
- --- a/drivers/leds/leds-gpio.c
- +++ b/drivers/leds/leds-gpio.c
- @@ -100,6 +100,12 @@ static int create_gpio_led(const struct
- if (template->active_low)
- flags |= GPIOF_ACTIVE_LOW;
-
- + if (template->open_drain)
- + flags |= GPIOF_OPEN_DRAIN;
- +
- + if (template->open_source)
- + flags |= GPIOF_OPEN_SOURCE;
- +
- ret = devm_gpio_request_one(parent, template->gpio, flags,
- template->name);
- if (ret < 0)
- --- a/include/linux/leds.h
- +++ b/include/linux/leds.h
- @@ -395,6 +395,8 @@ struct gpio_led {
- unsigned default_state : 2;
- unsigned retain_state_shutdown : 1;
- /* default_state should be one of LEDS_GPIO_DEFSTATE_(ON|OFF|KEEP) */
- + unsigned open_drain : 1;
- + unsigned open_source : 1;
- struct gpio_desc *gpiod;
- };
- #define LEDS_GPIO_DEFSTATE_OFF 0
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