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| author | Linus Walleij <linus.walleij@linaro.org> | 2012-01-20 20:53:15 +0400 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2012-03-13 01:49:03 +0400 |
| commit | 51dddfe839a0ebcb5ff61a779e3f2768714f9957 (patch) | |
| tree | aeb1a71faf3f8e284cc9af1dd081c673c6051136 /arch/arm | |
| parent | dc0b1aa3e2fefa6372f38d7f6d5d33581567a1b5 (diff) | |
| download | linux-51dddfe839a0ebcb5ff61a779e3f2768714f9957.tar.xz | |
ARM: u300: configure some pins as an example
To show how the pin configuration is used on the U300, let's
include some configs for two GPIO pins.
ChangeLog v1->v2:
- Provide a better example, set the clock return pin to pull-up
and set the card detect pin to high impedance.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-u300/core.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/arch/arm/mach-u300/core.c b/arch/arm/mach-u300/core.c index f326d3136128..a7b3f36e2262 100644 --- a/arch/arm/mach-u300/core.c +++ b/arch/arm/mach-u300/core.c @@ -27,6 +27,7 @@ #include <linux/mtd/fsmc.h> #include <linux/pinctrl/machine.h> #include <linux/pinctrl/consumer.h> +#include <linux/pinctrl/pinconf-generic.h> #include <linux/dma-mapping.h> #include <asm/types.h> @@ -1605,7 +1606,15 @@ static struct platform_device dma_device = { }, }; -/* Pinmux settings */ +static unsigned long pin_pullup_conf[] = { + PIN_CONF_PACKED(PIN_CONFIG_BIAS_PULL_UP, 1), +}; + +static unsigned long pin_highz_conf[] = { + PIN_CONF_PACKED(PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0), +}; + +/* Pin control settings */ static struct pinctrl_map __initdata u300_pinmux_map[] = { /* anonymous maps for chip power and EMIFs */ PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "power"), @@ -1615,6 +1624,12 @@ static struct pinctrl_map __initdata u300_pinmux_map[] = { PIN_MAP_MUX_GROUP_DEFAULT("mmci", "pinctrl-u300", NULL, "mmc0"), PIN_MAP_MUX_GROUP_DEFAULT("pl022", "pinctrl-u300", NULL, "spi0"), PIN_MAP_MUX_GROUP_DEFAULT("uart0", "pinctrl-u300", NULL, "uart0"), + /* This pin is used for clock return rather than GPIO */ + PIN_MAP_CONFIGS_PIN_DEFAULT("mmci", "pinctrl-u300", "PIO APP GPIO 11", + pin_pullup_conf), + /* This pin is used for card detect */ + PIN_MAP_CONFIGS_PIN_DEFAULT("mmci", "pinctrl-u300", "PIO MS INS", + pin_highz_conf), }; struct u300_mux_hog { @@ -1640,7 +1655,6 @@ static int __init u300_pinctrl_fetch(void) for (i = 0; i < ARRAY_SIZE(u300_mux_hogs); i++) { struct pinctrl *p; - int ret; p = pinctrl_get_select_default(u300_mux_hogs[i].dev); if (IS_ERR(p)) { |