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Commit 51dddfe8 authored by Linus Walleij's avatar Linus Walleij
Browse files

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: default avatarLinus Walleij <linus.walleij@linaro.org>
parent dc0b1aa3

arch/arm/mach-u300/core.c

+16 −2
Original line number Diff line number Diff line
@@ -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)) {