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a4320b3332
Add patches for the leds-gpio driver to make it usable with open-drain and open-source kind of GPIO lines. This type of functionality is required by various MikroTik boards. Signed-off-by: Gabor Juhos <juhosg@freemail.hu>
46 lines
1.5 KiB
Diff
46 lines
1.5 KiB
Diff
From 183148e0789bee1cd5c46ba49afcb211f636f8a2 Mon Sep 17 00:00:00 2001
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From: Gabor Juhos <juhosg@freemail.hu>
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Date: Mon, 15 Jan 2018 15:01:14 +0100
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Subject: [PATCH] leds: gpio: allow to use OPEN_{DRAIN,SOURCE} flags with
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legacy GPIOs
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LEDs which are connected to open-source or open-drain type of GPIO lines
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can be used only, if those are defined via devicetree.
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Add two new fields to 'struct gpio_led' in order to make it possible to
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specify this type of GPIO lines to the leds-gpio driver via platform data.
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Also update the create_gpio_led() function to set the GPIOF_OPEN_DRAIN and
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GPIOF_OPEN_SOURCE flags for the given GPIO line.
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Signed-off-by: Gabor Juhos <juhosg@freemail.hu>
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---
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drivers/leds/leds-gpio.c | 6 ++++++
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include/linux/leds.h | 2 ++
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2 files changed, 8 insertions(+)
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--- a/drivers/leds/leds-gpio.c
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+++ b/drivers/leds/leds-gpio.c
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@@ -100,6 +100,12 @@ static int create_gpio_led(const struct
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if (template->active_low)
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flags |= GPIOF_ACTIVE_LOW;
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+ if (template->open_drain)
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+ flags |= GPIOF_OPEN_DRAIN;
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+
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+ if (template->open_source)
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+ flags |= GPIOF_OPEN_SOURCE;
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+
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ret = devm_gpio_request_one(parent, template->gpio, flags,
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template->name);
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if (ret < 0)
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--- a/include/linux/leds.h
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+++ b/include/linux/leds.h
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@@ -380,6 +380,8 @@ struct gpio_led {
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unsigned panic_indicator : 1;
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unsigned default_state : 2;
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/* default_state should be one of LEDS_GPIO_DEFSTATE_(ON|OFF|KEEP) */
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+ unsigned open_drain : 1;
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+ unsigned open_source : 1;
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struct gpio_desc *gpiod;
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};
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#define LEDS_GPIO_DEFSTATE_OFF 0
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