[PATCH 4/4 v2] ARM: u300: configure some pins as an example
From: Linus Walleij <hidden>
Date: 2012-03-12 21:15:06
Also in:
lkml
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
From: Linus Walleij <redacted> 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 <redacted> --- 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 f326d31..a7b3f36 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)) {
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1.7.8