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ARM: ixp4xx: convert remaining users to use gpiolib 

A few call sites inside mach-ixp4xx were still using the custom
ixp4xx GPIO API with gpio_line_* accessors, convert all these
to use the standard gpiolib functions instead. Also attempt to
request and label all GPIOs before use. Move the GPIO requests
to per-machine device_initcalls() so we are not dependent on the
GPIO chip to be available at machine_init time.

Cc: Imre Kaloz <kaloz@openwrt.org>
Cc: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Krzysztof Halasa <khc@pm.waw.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2013-09-10 11:19:55 +02:00
parent 272b98c645
commit 8040dd09c2
4 changed files with 85 additions and 54 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

65
arch/arm/mach-ixp4xx/dsmg600-setup.c
View File

@ -26,6 +26,7 @@
#include <linux/reboot.h>
#include <linux/i2c.h>
#include <linux/i2c-gpio.h>
#include <linux/gpio.h>
#include <mach/hardware.h>
@ -161,11 +162,8 @@ static struct platform_device *dsmg600_devices[] __initdata = {
static void dsmg600_power_off(void)
{
/* enable the pwr cntl gpio */
gpio_line_config(DSMG600_PO_GPIO, IXP4XX_GPIO_OUT);
/* poweroff */
gpio_line_set(DSMG600_PO_GPIO, IXP4XX_GPIO_HIGH);
/* enable the pwr cntl and drive it high */
gpio_direction_output(DSMG600_PO_GPIO, 1);
}
/* This is used to make sure the power-button pusher is serious. The button
@ -202,7 +200,7 @@ static void dsmg600_power_handler(unsigned long data)
ctrl_alt_del();
/* Change the state of the power LED to "blink" */
gpio_line_set(DSMG600_LED_PWR_GPIO, IXP4XX_GPIO_LOW);
gpio_set_value(DSMG600_LED_PWR_GPIO, 0);
} else {
power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
}
@ -228,6 +226,40 @@ static void __init dsmg600_timer_init(void)
ixp4xx_timer_init();
}
static int __init dsmg600_gpio_init(void)
{
if (!machine_is_dsmg600())
return 0;
gpio_request(DSMG600_RB_GPIO, "reset button");
if (request_irq(gpio_to_irq(DSMG600_RB_GPIO), &dsmg600_reset_handler,
IRQF_DISABLED | IRQF_TRIGGER_LOW,
"DSM-G600 reset button", NULL) < 0) {
printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
gpio_to_irq(DSMG600_RB_GPIO));
}
/*
* The power button on the D-Link DSM-G600 is on GPIO 15, but
* it cannot handle interrupts on that GPIO line. So we'll
* have to poll it with a kernel timer.
*/
/* Make sure that the power button GPIO is set up as an input */
gpio_request(DSMG600_PB_GPIO, "power button");
gpio_direction_input(DSMG600_PB_GPIO);
/* Request poweroff GPIO line */
gpio_request(DSMG600_PO_GPIO, "power off button");
/* Set the initial value for the power button IRQ handler */
power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500));
return 0;
}
device_initcall(dsmg600_gpio_init);
static void __init dsmg600_init(void)
{
ixp4xx_sys_init();
@ -251,27 +283,6 @@ static void __init dsmg600_init(void)
platform_add_devices(dsmg600_devices, ARRAY_SIZE(dsmg600_devices));
pm_power_off = dsmg600_power_off;
if (request_irq(gpio_to_irq(DSMG600_RB_GPIO), &dsmg600_reset_handler,
IRQF_DISABLED | IRQF_TRIGGER_LOW,
"DSM-G600 reset button", NULL) < 0) {
printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
gpio_to_irq(DSMG600_RB_GPIO));
}
/* The power button on the D-Link DSM-G600 is on GPIO 15, but
* it cannot handle interrupts on that GPIO line. So we'll
* have to poll it with a kernel timer.
*/
/* Make sure that the power button GPIO is set up as an input */
gpio_line_config(DSMG600_PB_GPIO, IXP4XX_GPIO_IN);
/* Set the initial value for the power button IRQ handler */
power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500));
}
MACHINE_START(DSMG600, "D-Link DSM-G600 RevA")

8
arch/arm/mach-ixp4xx/ixdp425-setup.c
View File

@ -20,6 +20,7 @@
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <asm/types.h>
#include <asm/setup.h>
#include <asm/memory.h>
@ -80,10 +81,10 @@ ixdp425_flash_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
if (ctrl & NAND_CTRL_CHANGE) {
if (ctrl & NAND_NCE) {
gpio_line_set(IXDP425_NAND_NCE_PIN, IXP4XX_GPIO_LOW);
gpio_set_value(IXDP425_NAND_NCE_PIN, 0);
udelay(5);
} else
gpio_line_set(IXDP425_NAND_NCE_PIN, IXP4XX_GPIO_HIGH);
gpio_set_value(IXDP425_NAND_NCE_PIN, 1);
offset = (ctrl & NAND_CLE) ? IXDP425_NAND_CMD_BYTE : 0;
offset |= (ctrl & NAND_ALE) ? IXDP425_NAND_ADDR_BYTE : 0;
@ -227,7 +228,8 @@ static void __init ixdp425_init(void)
ixdp425_flash_nand_resource.start = IXP4XX_EXP_BUS_BASE(3),
ixdp425_flash_nand_resource.end = IXP4XX_EXP_BUS_BASE(3) + 0x10 - 1;
gpio_line_config(IXDP425_NAND_NCE_PIN, IXP4XX_GPIO_OUT);
gpio_request(IXDP425_NAND_NCE_PIN, "NAND NCE pin");
gpio_direction_output(IXDP425_NAND_NCE_PIN, 0);
/* Configure expansion bus for NAND Flash */
*IXP4XX_EXP_CS3 = IXP4XX_EXP_BUS_CS_EN |

49
arch/arm/mach-ixp4xx/nas100d-setup.c
View File

@ -184,11 +184,8 @@ static void nas100d_power_off(void)
{
/* This causes the box to drop the power and go dead. */
/* enable the pwr cntl gpio */
gpio_line_config(NAS100D_PO_GPIO, IXP4XX_GPIO_OUT);
/* do the deed */
gpio_line_set(NAS100D_PO_GPIO, IXP4XX_GPIO_HIGH);
/* enable the pwr cntl gpio and assert power off */
gpio_direction_output(NAS100D_PO_GPIO, 1);
}
/* This is used to make sure the power-button pusher is serious. The button
@ -225,7 +222,7 @@ static void nas100d_power_handler(unsigned long data)
ctrl_alt_del();
/* Change the state of the power LED to "blink" */
gpio_line_set(NAS100D_LED_PWR_GPIO, IXP4XX_GPIO_LOW);
gpio_set_value(NAS100D_LED_PWR_GPIO, 0);
} else {
power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
}
@ -242,6 +239,33 @@ static irqreturn_t nas100d_reset_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
static int __init nas100d_gpio_init(void)
{
if (!machine_is_nas100d())
return 0;
/*
* The power button on the Iomega NAS100d is on GPIO 14, but
* it cannot handle interrupts on that GPIO line. So we'll
* have to poll it with a kernel timer.
*/
/* Request the power off GPIO */
gpio_request(NAS100D_PO_GPIO, "power off");
/* Make sure that the power button GPIO is set up as an input */
gpio_request(NAS100D_PB_GPIO, "power button");
gpio_direction_input(NAS100D_PB_GPIO);
/* Set the initial value for the power button IRQ handler */
power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500));
return 0;
}
device_initcall(nas100d_gpio_init);
static void __init nas100d_init(void)
{
uint8_t __iomem *f;
@ -278,19 +302,6 @@ static void __init nas100d_init(void)
gpio_to_irq(NAS100D_RB_GPIO));
}
/* The power button on the Iomega NAS100d is on GPIO 14, but
* it cannot handle interrupts on that GPIO line. So we'll
* have to poll it with a kernel timer.
*/
/* Make sure that the power button GPIO is set up as an input */
gpio_line_config(NAS100D_PB_GPIO, IXP4XX_GPIO_IN);
/* Set the initial value for the power button IRQ handler */
power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500));
/*
* Map in a portion of the flash and read the MAC address.
* Since it is stored in BE in the flash itself, we need to

17
arch/arm/mach-ixp4xx/nslu2-setup.c
View File

@ -197,11 +197,8 @@ static void nslu2_power_off(void)
{
/* This causes the box to drop the power and go dead. */
/* enable the pwr cntl gpio */
gpio_line_config(NSLU2_PO_GPIO, IXP4XX_GPIO_OUT);
/* do the deed */
gpio_line_set(NSLU2_PO_GPIO, IXP4XX_GPIO_HIGH);
/* enable the pwr cntl gpio and assert power off */
gpio_direction_output(NSLU2_PO_GPIO, 1);
}
static irqreturn_t nslu2_power_handler(int irq, void *dev_id)
@ -223,6 +220,16 @@ static irqreturn_t nslu2_reset_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
static int __init nslu2_gpio_init(void)
{
if (!machine_is_nslu2())
return 0;
/* Request the power off GPIO */
return gpio_request(NSLU2_PO_GPIO, "power off");
}
device_initcall(nslu2_gpio_init);
static void __init nslu2_timer_init(void)
{
/* The xtal on this machine is non-standard. */