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ARM: nomadik: move hog code to use DT hogs 

Instead of introducing a board-specific DT node for biasing the
MMC/SD and SATA ports, use the new device tree hogs.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Linus Walleij 2015-05-30 17:30:26 +02:00 committed by Olof Johansson
parent 28d250c4ed
commit 4cec8cd790
3 changed files with 20 additions and 52 deletions
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18
arch/arm/boot/dts/ste-nomadik-nhk15.dts
View File

@ -131,6 +131,16 @@
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <2>;
/*
* This will turn off SATA so that MMC/SD
* can thrive
*/
mmcsd-gpio {
gpio-hog;
gpios = <2 0x0>;
output-low;
line-name = "SATA EN";
};
};
};
};
@ -141,12 +151,4 @@
wp-gpios = <&stmpe_gpio44 18 GPIO_ACTIVE_HIGH>;
};
};
/* Custom board node with GPIO pins to active etc */
usb-s8815 {
/* This will turn off SATA so that MMC/SD can thrive */
mmcsd-gpio {
gpios = <&stmpe_gpio44 2 0x1>;
};
};
};

18
arch/arm/boot/dts/ste-nomadik-s8815.dts
View File

@ -19,6 +19,16 @@
serial1 = &uart1;
};
gpio3: gpio@101e7000 {
/* This hog will bias the MMC/SD card detect line */
mmcsd-gpio {
gpio-hog;
gpios = <16 0x0>;
output-low;
line-name = "card detect bias";
};
};
src@101e0000 {
/* These chrystal drivers are not used on this board */
disable-sxtalo;
@ -109,14 +119,6 @@
};
};
/* Custom board node with GPIO pins to active etc */
usb-s8815 {
/* This will bias the MMC/SD card detect line */
mmcsd-gpio {
gpios = <&gpio3 16 0x1>;
};
};
/* The user LED on the board is set up to be used for heartbeat */
leds {
compatible = "gpio-leds";

36
arch/arm/mach-nomadik/cpu-8815.c
View File

@ -26,10 +26,8 @@
#include <linux/irq.h>
#include <linux/dma-mapping.h>
#include <linux/of_irq.h>
#include <linux/of_gpio.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/gpio.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
@ -109,40 +107,6 @@ static void cpu8815_restart(enum reboot_mode mode, const char *cmd)
writel(1, srcbase + 0x18);
}
/*
* This GPIO pin turns on a line that is used to detect card insertion
* on this board.
*/
static int __init cpu8815_mmcsd_init(void)
{
struct device_node *cdbias;
int gpio, err;
cdbias = of_find_node_by_path("/usb-s8815/mmcsd-gpio");
if (!cdbias) {
pr_info("could not find MMC/SD card detect bias node\n");
return 0;
}
gpio = of_get_gpio(cdbias, 0);
if (gpio < 0) {
pr_info("could not obtain MMC/SD card detect bias GPIO\n");
return 0;
}
err = gpio_request(gpio, "card detect bias");
if (err) {
pr_info("failed to request card detect bias GPIO %d\n", gpio);
return -ENODEV;
}
err = gpio_direction_output(gpio, 0);
if (err){
pr_info("failed to set GPIO %d as output, low\n", gpio);
return err;
}
pr_info("enabled USB-S8815 CD bias GPIO %d, low\n", gpio);
return 0;
}
device_initcall(cpu8815_mmcsd_init);
static const char * cpu8815_board_compat[] = {
"st,nomadik-nhk-15",
"calaosystems,usb-s8815",