[PATCH 13/13] FB: sa11x0: convert shannon display enable accesses to use GPIO subsystem
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STALE5343d
From: Russell King - ARM Linux <hidden>
Date: 2012-02-04 09:42:30
Also in:
linux-arm-kernel
Subsystem:
arm port, framebuffer layer, the rest · Maintainers:
Russell King, Helge Deller, Linus Torvalds
Rather than accessing GPSR and GPCR directly, use the GPIO subsystem instead. Signed-off-by: Russell King <redacted> --- 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:
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1.7.4.4