diff options
Diffstat (limited to 'target/linux/ramips/patches-5.4/111-gpio-mmio-introduce-BGPIOF_NO_SET_ON_INPUT.patch')
| -rw-r--r-- | target/linux/ramips/patches-5.4/111-gpio-mmio-introduce-BGPIOF_NO_SET_ON_INPUT.patch | 85 |
1 files changed, 0 insertions, 85 deletions
diff --git a/target/linux/ramips/patches-5.4/111-gpio-mmio-introduce-BGPIOF_NO_SET_ON_INPUT.patch b/target/linux/ramips/patches-5.4/111-gpio-mmio-introduce-BGPIOF_NO_SET_ON_INPUT.patch deleted file mode 100644 index fdb89d0902..0000000000 --- a/target/linux/ramips/patches-5.4/111-gpio-mmio-introduce-BGPIOF_NO_SET_ON_INPUT.patch +++ /dev/null @@ -1,85 +0,0 @@ -From 5d7b644aad721ecca20bd8976b38fb243fdc84f9 Mon Sep 17 00:00:00 2001 -From: Chuanhong Guo <gch981213@gmail.com> -Date: Sun, 15 Mar 2020 20:13:37 +0800 -Subject: [PATCH] gpio: mmio: introduce BGPIOF_NO_SET_ON_INPUT -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -Some gpio controllers ignores pin value writing when that pin is -configured as input mode. As a result, bgpio_dir_out should set -pin to output before configuring pin values or gpio pin values -can't be set up properly. -Introduce two variants of bgpio_dir_out: bgpio_dir_out_val_first -and bgpio_dir_out_dir_first, and assign direction_output according -to a new flag: BGPIOF_NO_SET_ON_INPUT. - -Signed-off-by: Chuanhong Guo <gch981213@gmail.com> -Tested-by: René van Dorst <opensource@vdorst.com> -Reviewed-by: Sergio Paracuellos <sergio.paracuellos@gmail.com> -Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> ---- - drivers/gpio/gpio-mmio.c | 23 +++++++++++++++++++---- - include/linux/gpio/driver.h | 1 + - 2 files changed, 20 insertions(+), 4 deletions(-) - ---- a/drivers/gpio/gpio-mmio.c -+++ b/drivers/gpio/gpio-mmio.c -@@ -381,12 +381,10 @@ static int bgpio_get_dir(struct gpio_chi - return 1; - } - --static int bgpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val) -+static void bgpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val) - { - unsigned long flags; - -- gc->set(gc, gpio, val); -- - spin_lock_irqsave(&gc->bgpio_lock, flags); - - gc->bgpio_dir |= bgpio_line2mask(gc, gpio); -@@ -397,7 +395,21 @@ static int bgpio_dir_out(struct gpio_chi - gc->write_reg(gc->reg_dir_out, gc->bgpio_dir); - - spin_unlock_irqrestore(&gc->bgpio_lock, flags); -+} - -+static int bgpio_dir_out_dir_first(struct gpio_chip *gc, unsigned int gpio, -+ int val) -+{ -+ bgpio_dir_out(gc, gpio, val); -+ gc->set(gc, gpio, val); -+ return 0; -+} -+ -+static int bgpio_dir_out_val_first(struct gpio_chip *gc, unsigned int gpio, -+ int val) -+{ -+ gc->set(gc, gpio, val); -+ bgpio_dir_out(gc, gpio, val); - return 0; - } - -@@ -530,7 +542,10 @@ static int bgpio_setup_direction(struct - if (dirout || dirin) { - gc->reg_dir_out = dirout; - gc->reg_dir_in = dirin; -- gc->direction_output = bgpio_dir_out; -+ if (flags & BGPIOF_NO_SET_ON_INPUT) -+ gc->direction_output = bgpio_dir_out_dir_first; -+ else -+ gc->direction_output = bgpio_dir_out_val_first; - gc->direction_input = bgpio_dir_in; - gc->get_direction = bgpio_get_dir; - } else { ---- a/include/linux/gpio/driver.h -+++ b/include/linux/gpio/driver.h -@@ -567,6 +567,7 @@ int bgpio_init(struct gpio_chip *gc, str - #define BGPIOF_BIG_ENDIAN_BYTE_ORDER BIT(3) - #define BGPIOF_READ_OUTPUT_REG_SET BIT(4) /* reg_set stores output value */ - #define BGPIOF_NO_OUTPUT BIT(5) /* only input */ -+#define BGPIOF_NO_SET_ON_INPUT BIT(6) - - int gpiochip_irq_map(struct irq_domain *d, unsigned int irq, - irq_hw_number_t hwirq); |