diff options
| author | Michael Grzeschik <m.grzeschik@pengutronix.de> | 2018-03-19 10:21:19 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2018-03-21 09:02:34 +0100 |
| commit | 23bfa32300ae90106a7e9b3855995f1bdc9d50c9 (patch) | |
| tree | 08f9187f6515eed4c3959541f820a3cf5dc50fbe | |
| parent | ca880912a473ec6e92d78ddf0aa24857536e57da (diff) | |
| download | barebox-23bfa32300ae90106a7e9b3855995f1bdc9d50c9.tar.gz barebox-23bfa32300ae90106a7e9b3855995f1bdc9d50c9.tar.xz | |
ARM: i.MX: Add lowlevel gpio input functions
This adds the function to set direction input and read the values
in the header file for setting i.MX gpios early.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | arch/arm/mach-imx/include/mach/imx-gpio.h | 46 |
1 files changed, 41 insertions, 5 deletions
diff --git a/arch/arm/mach-imx/include/mach/imx-gpio.h b/arch/arm/mach-imx/include/mach/imx-gpio.h index 5e673beef9..891c33a3f4 100644 --- a/arch/arm/mach-imx/include/mach/imx-gpio.h +++ b/arch/arm/mach-imx/include/mach/imx-gpio.h @@ -8,15 +8,21 @@ * regular gpio functions outside of lowlevel code! */ -static inline void imx_gpio_direction_output(void __iomem *gdir, void __iomem *dr, - int gpio, int value) +static inline void imx_gpio_direction(void __iomem *gdir, void __iomem *dr, + int gpio, int out, int value) { uint32_t val; val = readl(gdir); - val |= 1 << gpio; + if (out) + val |= 1 << gpio; + else + val &= ~(1 << gpio); writel(val, gdir); + if (!out) + return; + val = readl(dr); if (value) val |= 1 << gpio; @@ -28,7 +34,7 @@ static inline void imx_gpio_direction_output(void __iomem *gdir, void __iomem *d static inline void imx1_gpio_direction_output(void *base, int gpio, int value) { - imx_gpio_direction_output(base + 0x0, base + 0x1c, gpio, value); + imx_gpio_direction(base + 0x0, base + 0x1c, gpio, 1, value); } #define imx21_gpio_direction_output(base, gpio, value) imx1_gpio_direction_output(base, gpio,value) @@ -36,7 +42,7 @@ static inline void imx1_gpio_direction_output(void *base, int gpio, int value) static inline void imx31_gpio_direction_output(void *base, int gpio, int value) { - imx_gpio_direction_output(base + 0x4, base + 0x0, gpio, value); + imx_gpio_direction(base + 0x4, base + 0x0, gpio, 1, value); } #define imx25_gpio_direction_output(base, gpio, value) imx31_gpio_direction_output(base, gpio,value) @@ -45,4 +51,34 @@ static inline void imx31_gpio_direction_output(void *base, int gpio, int value) #define imx53_gpio_direction_output(base, gpio, value) imx31_gpio_direction_output(base, gpio,value) #define imx6_gpio_direction_output(base, gpio, value) imx31_gpio_direction_output(base, gpio,value) +static inline void imx1_gpio_direction_input(void *base, int gpio, int value) +{ + imx_gpio_direction(base + 0x0, base + 0x1c, gpio, 0, 0); +} + +#define imx21_gpio_direction_input(base, gpio, value) imx1_gpio_direction_input(base, gpio) +#define imx27_gpio_direction_input(base, gpio, value) imx1_gpio_direction_input(base, gpio) + +static inline void imx31_gpio_direction_input(void *base, int gpio) +{ + imx_gpio_direction(base + 0x4, base + 0x0, gpio, 0, 0); +} + +#define imx25_gpio_direction_input(base, gpio, value) imx31_gpio_direction_input(base, gpio) +#define imx35_gpio_direction_input(base, gpio, value) imx31_gpio_direction_input(base, gpio) +#define imx51_gpio_direction_input(base, gpio, value) imx31_gpio_direction_input(base, gpio) +#define imx53_gpio_direction_input(base, gpio, value) imx31_gpio_direction_input(base, gpio) +#define imx6_gpio_direction_input(base, gpio) imx31_gpio_direction_input(base, gpio) + +#define imx1_gpio_val(base, gpio) readl(base + 0x1c) & (1 << gpio) ? 1 : 0 +#define imx21_gpio_val(base, gpio) imx1_gpio_val(base, gpio) +#define imx27_gpio_val(base, gpio) imx1_gpio_val(base, gpio) + +#define imx31_gpio_val(base, gpio) readl(base) & (1 << gpio) ? 1 : 0 +#define imx25_gpio_val(base, gpio) imx31_gpio_val(base, gpio) +#define imx35_gpio_val(base, gpio) imx31_gpio_val(base, gpio) +#define imx51_gpio_val(base, gpio) imx31_gpio_val(base, gpio) +#define imx53_gpio_val(base, gpio) imx31_gpio_val(base, gpio) +#define imx6_gpio_val(base, gpio) imx31_gpio_val(base, gpio) + #endif /* __MACH_IMX_GPIO_H */ |