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ARM: u300: configure some pins as an example

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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>
This commit is contained in:
Linus Walleij 2012-01-20 17:53:15 +01:00
parent dc0b1aa3e2
commit 51dddfe839
1 changed files with 16 additions and 2 deletions
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18
arch/arm/mach-u300/core.c
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@ -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)) {