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| author | Gabor Juhos <juhosg@freemail.hu> | 2018-01-18 13:50:31 +0100 |
|---|---|---|
| committer | John Crispin <john@phrozen.org> | 2018-01-22 10:53:32 +0100 |
| commit | a4320b3332fb76e17b403c2df2f0f9ad77aafb33 (patch) | |
| tree | 708749094a3d7fcb3a368a7fbc3eee0f41600cc7 /target/linux/ar71xx/patches-4.9 | |
| parent | e379e60b17157d91ae51236f0a747772b0cc1662 (diff) | |
| download | upstream-a4320b3332fb76e17b403c2df2f0f9ad77aafb33.tar.gz upstream-a4320b3332fb76e17b403c2df2f0f9ad77aafb33.tar.bz2 upstream-a4320b3332fb76e17b403c2df2f0f9ad77aafb33.zip | |
ar71xx: make leds-gpio usable with single-ended GPIOs
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>
Diffstat (limited to 'target/linux/ar71xx/patches-4.9')
| -rw-r--r-- | target/linux/ar71xx/patches-4.9/442-leds-gpio-allow-to-use-OPEN_-DRAIN-SOURCE-flags-with.patch | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/target/linux/ar71xx/patches-4.9/442-leds-gpio-allow-to-use-OPEN_-DRAIN-SOURCE-flags-with.patch b/target/linux/ar71xx/patches-4.9/442-leds-gpio-allow-to-use-OPEN_-DRAIN-SOURCE-flags-with.patch new file mode 100644 index 0000000000..26c8cb5dfc --- /dev/null +++ b/target/linux/ar71xx/patches-4.9/442-leds-gpio-allow-to-use-OPEN_-DRAIN-SOURCE-flags-with.patch @@ -0,0 +1,45 @@ +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 +@@ -380,6 +380,8 @@ struct gpio_led { + unsigned panic_indicator : 1; + unsigned default_state : 2; + /* 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 |