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>

1 files changed, 14 insertions, 5 deletions

diff --git a/drivers/pcmcia/sa1100_cerf.c b/drivers/pcmcia/sa1100_cerf.c
index 9d0424ea9a4f..50df0e682b68 100644
--- a/drivers/pcmcia/sa1100_cerf.c
+++ b/drivers/pcmcia/sa1100_cerf.c
@@ -10,6 +10,7 @@
 #include <linux/device.h>
 #include <linux/init.h>
 #include <linux/delay.h>
+#include <linux/gpio.h>
 
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
@@ -21,6 +22,12 @@
 
 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].name = "CF_CD";
         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;
 }
 
+static void cerf_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
+{
+        gpio_free(CERF_GPIO_CF_RESET);
+}
+
 static void
 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;
         }
 
-        if (state->flags & SS_RESET) {
-                GPSR = CERF_GPIO_CF_RESET;
-        } else {
-                GPCR = CERF_GPIO_CF_RESET;
-        }
+        gpio_set_value(CERF_GPIO_CF_RESET, !!(state->flags & SS_RESET));
 
         return 0;
 }
@@ -69,6 +77,7 @@ cerf_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 static struct pcmcia_low_level cerf_pcmcia_ops = { 
         .owner                  = THIS_MODULE,
         .hw_init                = cerf_pcmcia_hw_init,
+        .hw_shutdown            = cerf_pcmcia_hw_shutdown,
         .socket_state           = cerf_pcmcia_socket_state,
         .configure_socket       = cerf_pcmcia_configure_socket,
 };