This patch adds the context save restore functions for GPIO
Signed-off-by: Rajendra Nayak <rnayak@xxxxxx>
---
arch/arm/plat-omap/gpio.c | 77 +++++++++++++++++++++++++++++++++
arch/arm/plat-omap/include/mach/gpio.h | 19 +++++++-
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 2008-09-01 18:11:28.000000000
+0530
+++ linux-omap-2.6/arch/arm/plat-omap/gpio.c 2008-09-01 18:11:51.000000000 +0530
@@ -102,6 +102,7 @@
#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
@@ -1708,6 +1709,82 @@ void omap2_gpio_resume_after_retention(v
#endif
+#ifdef CONFIG_ARCH_OMAP34XX
+static struct omap3_gpio_regs gpio_restore_banks[6];
+/* save the registers of bank 2-6 */
+void omap3_gpio_save(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_restore_banks[i].gpio_sysconfig =
+ __raw_readl(bank->base + OMAP24XX_GPIO_SYSCONFIG);
+ gpio_restore_banks[i].gpio_irqenable1 =
+ __raw_readl(bank->base + OMAP24XX_GPIO_IRQENABLE1);
+ gpio_restore_banks[i].gpio_irqenable2 =
+ __raw_readl(bank->base + OMAP24XX_GPIO_IRQENABLE2);
+ gpio_restore_banks[i].gpio_wake_en =
+ __raw_readl(bank->base + OMAP24XX_GPIO_WAKE_EN);
+ gpio_restore_banks[i].gpio_ctrl =
+ __raw_readl(bank->base + OMAP24XX_GPIO_CTRL);
+ gpio_restore_banks[i].gpio_oe =
+ __raw_readl(bank->base + OMAP24XX_GPIO_OE);
+ gpio_restore_banks[i].gpio_leveldetect0 =
+ __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT0);
+ gpio_restore_banks[i].gpio_leveldetect1 =
+ __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1);
+ gpio_restore_banks[i].gpio_risingdetect =
+ __raw_readl(bank->base + OMAP24XX_GPIO_RISINGDETECT);
+ gpio_restore_banks[i].gpio_fallingdetect =
+ __raw_readl(bank->base + OMAP24XX_GPIO_FALLINGDETECT);
+ gpio_restore_banks[i].gpio_dataout =
+ __raw_readl(bank->base + OMAP24XX_GPIO_DATAOUT);
+ gpio_restore_banks[i].gpio_setwkuena =
+ __raw_readl(bank->base + OMAP24XX_GPIO_SETWKUENA);
+ gpio_restore_banks[i].gpio_setdataout =
+ __raw_readl(bank->base + OMAP24XX_GPIO_SETDATAOUT);
+ }
+}
+EXPORT_SYMBOL(omap3_gpio_save);
+
+/* restore the required registers of bank 2-6 */
+void omap3_gpio_restore(void)
+{
+ int i;
+ for (i = 1; i < gpio_bank_count; i++) {
+ struct gpio_bank *bank = &gpio_bank[i];
+ __raw_writel(gpio_restore_banks[i].gpio_sysconfig,
+ bank->base + OMAP24XX_GPIO_SYSCONFIG);
+ __raw_writel(gpio_restore_banks[i].gpio_irqenable1,
+ bank->base + OMAP24XX_GPIO_IRQENABLE1);
+ __raw_writel(gpio_restore_banks[i].gpio_irqenable2,
+ bank->base + OMAP24XX_GPIO_IRQENABLE2);
+ __raw_writel(gpio_restore_banks[i].gpio_wake_en,
+ bank->base + OMAP24XX_GPIO_WAKE_EN);
+ __raw_writel(gpio_restore_banks[i].gpio_ctrl,
+ bank->base + OMAP24XX_GPIO_CTRL);
+ __raw_writel(gpio_restore_banks[i].gpio_oe,
+ bank->base + OMAP24XX_GPIO_OE);
+ __raw_writel(gpio_restore_banks[i].gpio_leveldetect0,
+ bank->base + OMAP24XX_GPIO_LEVELDETECT0);
+ __raw_writel(gpio_restore_banks[i].gpio_leveldetect1,
+ bank->base + OMAP24XX_GPIO_LEVELDETECT1);
+ __raw_writel(gpio_restore_banks[i].gpio_risingdetect,
+ bank->base + OMAP24XX_GPIO_RISINGDETECT);
+ __raw_writel(gpio_restore_banks[i].gpio_fallingdetect,
+ bank->base + OMAP24XX_GPIO_FALLINGDETECT);
+ __raw_writel(gpio_restore_banks[i].gpio_dataout,
+ bank->base + OMAP24XX_GPIO_DATAOUT);
+ __raw_writel(gpio_restore_banks[i].gpio_setwkuena,
+ bank->base + OMAP24XX_GPIO_SETWKUENA);
+ __raw_writel(gpio_restore_banks[i].gpio_setdataout,
+ bank->base + OMAP24XX_GPIO_SETDATAOUT);
+ }
+}
+EXPORT_SYMBOL(omap3_gpio_restore);
+#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 2008-09-01
18:11:28.000000000 +0530
+++ linux-omap-2.6/arch/arm/plat-omap/include/mach/gpio.h 2008-09-01
18:11:51.000000000 +0530
@@ -70,6 +70,22 @@
IH_MPUIO_BASE + ((nr) & 0x0f) : \
IH_GPIO_BASE + (nr))
+struct omap3_gpio_regs {
+ u32 gpio_sysconfig;
+ u32 gpio_irqenable1;
+ u32 gpio_irqenable2;
+ u32 gpio_wake_en;
+ u32 gpio_ctrl;
+ u32 gpio_oe;
+ u32 gpio_leveldetect0;
+ u32 gpio_leveldetect1;
+ u32 gpio_risingdetect;
+ u32 gpio_fallingdetect;
+ u32 gpio_dataout;
+ u32 gpio_setwkuena;
+ u32 gpio_setdataout;
+};
+
extern int omap_gpio_init(void); /* Call from board init only */
extern int omap_request_gpio(int gpio);
extern void omap_free_gpio(int gpio);
@@ -80,7 +96,8 @@ 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(void);
+extern void omap3_gpio_restore(void);
/*-------------------------------------------------------------------------*/
/* Wrappers for "new style" GPIO calls, using the new infrastructure
--
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