From a4320b3332fb76e17b403c2df2f0f9ad77aafb33 Mon Sep 17 00:00:00 2001 From: Gabor Juhos Date: Thu, 18 Jan 2018 13:50:31 +0100 Subject: [PATCH] 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 --- ...to-use-OPEN_-DRAIN-SOURCE-flags-with.patch | 45 +++++++++++++++++++ ...to-use-OPEN_-DRAIN-SOURCE-flags-with.patch | 45 +++++++++++++++++++ 2 files changed, 90 insertions(+) create mode 100644 target/linux/ar71xx/patches-4.4/442-leds-gpio-allow-to-use-OPEN_-DRAIN-SOURCE-flags-with.patch create mode 100644 target/linux/ar71xx/patches-4.9/442-leds-gpio-allow-to-use-OPEN_-DRAIN-SOURCE-flags-with.patch diff --git a/target/linux/ar71xx/patches-4.4/442-leds-gpio-allow-to-use-OPEN_-DRAIN-SOURCE-flags-with.patch b/target/linux/ar71xx/patches-4.4/442-leds-gpio-allow-to-use-OPEN_-DRAIN-SOURCE-flags-with.patch new file mode 100644 index 0000000000..c17c879122 --- /dev/null +++ b/target/linux/ar71xx/patches-4.4/442-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 +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 +--- + 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 +@@ -110,6 +110,12 @@ 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 +@@ -350,6 +350,8 @@ struct gpio_led { + unsigned retain_state_suspended : 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 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 +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 +--- + 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 -- 2.25.1