This patch adds the context save restore functions for GPIO
Signed-off-by: Rajendra Nayak <rnayak@xxxxxx>
---
arch/arm/plat-omap/gpio.c | 93 +++++++++++++++++++++++++++++++++
arch/arm/plat-omap/include/mach/gpio.h | 3 -
2 files changed, 95 insertions(+), 1 deletion(-)
Index: linux-omap-2.6/arch/arm/plat-omap/gpio.c
===================================================================
--- linux-omap-2.6.orig/arch/arm/plat-omap/gpio.c 2008-09-25 16:27:09.000000000 +0530
+++ linux-omap-2.6/arch/arm/plat-omap/gpio.c 2008-09-25 16:27:14.000000000 +0530
@@ -101,6 +101,7 @@
#define OMAP24XX_GPIO_IRQSTATUS2 0x0028
#define OMAP24XX_GPIO_IRQENABLE2 0x002c
#define OMAP24XX_GPIO_IRQENABLE1 0x001c
+#define OMAP24XX_GPIO_WAKE_EN 0x0020
#define OMAP24XX_GPIO_CTRL 0x0030
#define OMAP24XX_GPIO_OE 0x0034
#define OMAP24XX_GPIO_DATAIN 0x0038
@@ -218,6 +219,23 @@ static struct gpio_bank gpio_bank_34xx[6
{ OMAP34XX_GPIO6_BASE, INT_34XX_GPIO_BANK6, IH_GPIO_BASE + 160, METHOD_GPIO_24XX },
};
+struct omap3_gpio_regs {
+ u32 sysconfig;
+ u32 irqenable1;
+ u32 irqenable2;
+ u32 wake_en;
+ u32 ctrl;
+ u32 oe;
+ u32 leveldetect0;
+ u32 leveldetect1;
+ u32 risingdetect;
+ u32 fallingdetect;
+ u32 dataout;
+ u32 setwkuena;
+ u32 setdataout;
+};
+
+static struct omap3_gpio_regs gpio_context[OMAP34XX_NR_GPIOS];
#endif
static struct gpio_bank *gpio_bank;
@@ -1711,6 +1729,81 @@ void omap2_gpio_resume_after_retention(v
#endif
+#ifdef CONFIG_ARCH_OMAP34XX
+/* save the registers of bank 2-6 */
+void omap3_gpio_save_context(void)
+{
+ int i;
+ /* saving banks from 2-6 only */
+ for (i = 1; i < gpio_bank_count; i++) {
+ struct gpio_bank *bank = &gpio_bank[i];
+ gpio_context[i].sysconfig =
+ __raw_readl(bank->base + OMAP24XX_GPIO_SYSCONFIG);
+ gpio_context[i].irqenable1 =
+ __raw_readl(bank->base + OMAP24XX_GPIO_IRQENABLE1);
+ gpio_context[i].irqenable2 =
+ __raw_readl(bank->base + OMAP24XX_GPIO_IRQENABLE2);
+ gpio_context[i].wake_en =
+ __raw_readl(bank->base + OMAP24XX_GPIO_WAKE_EN);
+ gpio_context[i].ctrl =
+ __raw_readl(bank->base + OMAP24XX_GPIO_CTRL);
+ gpio_context[i].oe =
+ __raw_readl(bank->base + OMAP24XX_GPIO_OE);
+ gpio_context[i].leveldetect0 =
+ __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT0);
+ gpio_context[i].leveldetect1 =
+ __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1);
+ gpio_context[i].risingdetect =
+ __raw_readl(bank->base + OMAP24XX_GPIO_RISINGDETECT);
+ gpio_context[i].fallingdetect =
+ __raw_readl(bank->base + OMAP24XX_GPIO_FALLINGDETECT);
+ gpio_context[i].dataout =
+ __raw_readl(bank->base + OMAP24XX_GPIO_DATAOUT);
+ gpio_context[i].setwkuena =
+ __raw_readl(bank->base + OMAP24XX_GPIO_SETWKUENA);
+ gpio_context[i].setdataout =
+ __raw_readl(bank->base + OMAP24XX_GPIO_SETDATAOUT);
+ }
+}
+EXPORT_SYMBOL(omap3_gpio_save_context);
+
+/* restore the required registers of bank 2-6 */
+void omap3_gpio_restore_context(void)
+{
+ int i;
+ for (i = 1; i < gpio_bank_count; i++) {
+ struct gpio_bank *bank = &gpio_bank[i];
+ __raw_writel(gpio_context[i].sysconfig,
+ bank->base + OMAP24XX_GPIO_SYSCONFIG);
+ __raw_writel(gpio_context[i].irqenable1,
+ bank->base + OMAP24XX_GPIO_IRQENABLE1);
+ __raw_writel(gpio_context[i].irqenable2,
+ bank->base + OMAP24XX_GPIO_IRQENABLE2);
+ __raw_writel(gpio_context[i].wake_en,
+ bank->base + OMAP24XX_GPIO_WAKE_EN);
+ __raw_writel(gpio_context[i].ctrl,
+ bank->base + OMAP24XX_GPIO_CTRL);
+ __raw_writel(gpio_context[i].oe,
+ bank->base + OMAP24XX_GPIO_OE);
+ __raw_writel(gpio_context[i].leveldetect0,
+ bank->base + OMAP24XX_GPIO_LEVELDETECT0);
+ __raw_writel(gpio_context[i].leveldetect1,
+ bank->base + OMAP24XX_GPIO_LEVELDETECT1);
+ __raw_writel(gpio_context[i].risingdetect,
+ bank->base + OMAP24XX_GPIO_RISINGDETECT);
+ __raw_writel(gpio_context[i].fallingdetect,
+ bank->base + OMAP24XX_GPIO_FALLINGDETECT);
+ __raw_writel(gpio_context[i].dataout,
+ bank->base + OMAP24XX_GPIO_DATAOUT);
+ __raw_writel(gpio_context[i].setwkuena,
+ bank->base + OMAP24XX_GPIO_SETWKUENA);
+ __raw_writel(gpio_context[i].setdataout,
+ bank->base + OMAP24XX_GPIO_SETDATAOUT);
+ }
+}
+EXPORT_SYMBOL(omap3_gpio_restore_context);
+#endif
+
/*
* This may get called early from board specific init
* for boards that have interrupts routed via FPGA.
Index: linux-omap-2.6/arch/arm/plat-omap/include/mach/gpio.h
===================================================================
--- linux-omap-2.6.orig/arch/arm/plat-omap/include/mach/gpio.h 2008-09-25 16:26:40.000000000 +0530
+++ linux-omap-2.6/arch/arm/plat-omap/include/mach/gpio.h 2008-09-25 16:27:14.000000000 +0530
@@ -80,7 +80,8 @@ extern void omap2_gpio_prepare_for_reten
extern void omap2_gpio_resume_after_retention(void);
extern void omap_set_gpio_debounce(int gpio, int enable);
extern void omap_set_gpio_debounce_time(int gpio, int enable);
-
+extern void omap3_gpio_save_context(void);
+extern void omap3_gpio_restore_context(void);
/*-------------------------------------------------------------------------*/
/* Wrappers for "new style" GPIO calls, using the new infrastructure
--
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