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PCMCIA: sa11x0: cerf: convert reset handling to use GPIO subsystem 

Rather than accessing GPSR and GPCR directly, use the GPIO subsystem
instead.

Acked-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2012-01-18 12:32:37 +00:00
parent f793e3ab9f
commit bbb58a1210
2 changed files with 15 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/mach-sa1100/include/mach/cerf.h
View File

@ -16,7 +16,7 @@
#define CERF_GPIO_CF_BVD2 19 #define CERF_GPIO_CF_BVD2 19
#define CERF_GPIO_CF_BVD1 20 #define CERF_GPIO_CF_BVD1 20
#define CERF_GPIO_CF_RESET GPIO_GPIO (21) #define CERF_GPIO_CF_RESET 21
#define CERF_GPIO_CF_IRQ 22 #define CERF_GPIO_CF_IRQ 22
#define CERF_GPIO_CF_CD 23 #define CERF_GPIO_CF_CD 23

19
drivers/pcmcia/sa1100_cerf.c
View File

@ -10,6 +10,7 @@
#include <linux/device.h> #include <linux/device.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/gpio.h>
#include <mach/hardware.h> #include <mach/hardware.h>
#include <asm/mach-types.h> #include <asm/mach-types.h>
@ -21,6 +22,12 @@
static int cerf_pcmcia_hw_init(struct soc_pcmcia_socket *skt) static int cerf_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{ {
int ret;
ret = gpio_request_one(CERF_GPIO_CF_RESET, GPIOF_OUT_INIT_LOW, "CF_RESET");
if (ret)
return ret;
skt->stat[SOC_STAT_CD].gpio = CERF_GPIO_CF_CD; skt->stat[SOC_STAT_CD].gpio = CERF_GPIO_CF_CD;
skt->stat[SOC_STAT_CD].name = "CF_CD"; skt->stat[SOC_STAT_CD].name = "CF_CD";
skt->stat[SOC_STAT_BVD1].gpio = CERF_GPIO_CF_BVD1; skt->stat[SOC_STAT_BVD1].gpio = CERF_GPIO_CF_BVD1;
@ -33,6 +40,11 @@ static int cerf_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
return 0; return 0;
} }
static void cerf_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
gpio_free(CERF_GPIO_CF_RESET);
}
static void static void
cerf_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state) cerf_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
{ {
@ -57,11 +69,7 @@ cerf_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
return -1; return -1;
} }
if (state->flags & SS_RESET) { gpio_set_value(CERF_GPIO_CF_RESET, !!(state->flags & SS_RESET));
GPSR = CERF_GPIO_CF_RESET;
} else {
GPCR = CERF_GPIO_CF_RESET;
}
return 0; return 0;
} }
@ -69,6 +77,7 @@ cerf_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
static struct pcmcia_low_level cerf_pcmcia_ops = { static struct pcmcia_low_level cerf_pcmcia_ops = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
.hw_init = cerf_pcmcia_hw_init, .hw_init = cerf_pcmcia_hw_init,
.hw_shutdown = cerf_pcmcia_hw_shutdown,
.socket_state = cerf_pcmcia_socket_state, .socket_state = cerf_pcmcia_socket_state,
.configure_socket = cerf_pcmcia_configure_socket, .configure_socket = cerf_pcmcia_configure_socket,
}; };