[PATCH 13/13] FB: sa11x0: convert shannon display enable accesses to use GPIO subsystem
Russell King - ARM Linux
linux at arm.linux.org.uk
Sat Feb 4 04:42:30 EST 2012
Rather than accessing GPSR and GPCR directly, use the GPIO subsystem
instead.
Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk>
---
arch/arm/mach-sa1100/include/mach/shannon.h | 2 +-
drivers/video/sa1100fb.c | 24 ++++++++++++++++--------
2 files changed, 17 insertions(+), 9 deletions(-)
diff --git a/arch/arm/mach-sa1100/include/mach/shannon.h b/arch/arm/mach-sa1100/include/mach/shannon.h
index ec27d6e..a0d1114 100644
--- a/arch/arm/mach-sa1100/include/mach/shannon.h
+++ b/arch/arm/mach-sa1100/include/mach/shannon.h
@@ -21,7 +21,7 @@
#define SHANNON_GPIO_U3_RTS GPIO_GPIO (19) /* ?? */
#define SHANNON_GPIO_U3_CTS GPIO_GPIO (20) /* ?? */
#define SHANNON_GPIO_SENSE_12V GPIO_GPIO (21) /* Input, 12v flash unprotect detected */
-#define SHANNON_GPIO_DISP_EN GPIO_GPIO (22) /* out */
+#define SHANNON_GPIO_DISP_EN 22 /* out */
/* XXX GPIO 23 unaccounted for */
#define SHANNON_GPIO_EJECT_0 GPIO_GPIO (24) /* in */
#define SHANNON_IRQ_GPIO_EJECT_0 IRQ_GPIO24
diff --git a/drivers/video/sa1100fb.c b/drivers/video/sa1100fb.c
index f3f55eb..379b2c5 100644
--- a/drivers/video/sa1100fb.c
+++ b/drivers/video/sa1100fb.c
@@ -173,6 +173,7 @@
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/cpufreq.h>
+#include <linux/gpio.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/mutex.h>
@@ -796,10 +797,8 @@ static void sa1100fb_enable_controller(struct sa1100fb_info *fbi)
DBAR2 = fbi->dbar2;
LCCR0 |= LCCR0_LEN;
- if (machine_is_shannon()) {
- GPDR |= SHANNON_GPIO_DISP_EN;
- GPSR = SHANNON_GPIO_DISP_EN;
- }
+ if (machine_is_shannon())
+ gpio_set_value(SHANNON_GPIO_DISP_EN, 1);
dev_dbg(fbi->dev, "DBAR1 = 0x%08lx\n", DBAR1);
dev_dbg(fbi->dev, "DBAR2 = 0x%08lx\n", DBAR2);
@@ -815,9 +814,8 @@ static void sa1100fb_disable_controller(struct sa1100fb_info *fbi)
dev_dbg(fbi->dev, "Disabling LCD controller\n");
- if (machine_is_shannon()) {
- GPCR = SHANNON_GPIO_DISP_EN;
- }
+ if (machine_is_shannon())
+ gpio_set_value(SHANNON_GPIO_DISP_EN, 0);
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&fbi->ctrlr_wait, &wait);
@@ -1230,6 +1228,13 @@ static int __devinit sa1100fb_probe(struct platform_device *pdev)
goto failed;
}
+ if (machine_is_shannon()) {
+ ret = gpio_request_one(SHANNON_GPIO_DISP_EN,
+ GPIOF_OUT_INIT_LOW, "display enable");
+ if (ret)
+ goto err_free_irq;
+ }
+
/*
* This makes sure that our colour bitfield
* descriptors are correctly initialised.
@@ -1240,7 +1245,7 @@ static int __devinit sa1100fb_probe(struct platform_device *pdev)
ret = register_framebuffer(&fbi->fb);
if (ret < 0)
- goto err_free_irq;
+ goto err_reg_fb;
#ifdef CONFIG_CPU_FREQ
fbi->freq_transition.notifier_call = sa1100fb_freq_transition;
@@ -1252,6 +1257,9 @@ static int __devinit sa1100fb_probe(struct platform_device *pdev)
/* This driver cannot be unloaded at the moment */
return 0;
+ err_reg_fb:
+ if (machine_is_shannon())
+ gpio_free(SHANNON_GPIO_DISP_EN);
err_free_irq:
free_irq(irq, fbi);
failed:
--
1.7.4.4
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