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authorRajendra Nayak <rnayak@ti.com>2008-09-26 14:17:48 +0200
committerKevin Hilman <khilman@deeprootsystems.com>2009-11-11 23:40:12 +0100
commit40c670f0314c3c9463ce9c2f2b9b1085884837f6 (patch)
treef603ced6489005ddecd67f8c17a560f78d451d29 /arch/arm/plat-omap/gpio.c
parentOMAP3: PM: GPMC context save/restore (diff)
downloadlinux-40c670f0314c3c9463ce9c2f2b9b1085884837f6.tar.xz
linux-40c670f0314c3c9463ce9c2f2b9b1085884837f6.zip
OMAP3: PM: GPIO context save/restore
Add context save and restore to enable off-mode. Signed-off-by: Rajendra Nayak <rnayak@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/plat-omap/gpio.c')
-rw-r--r--arch/arm/plat-omap/gpio.c92
1 files changed, 92 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index 35a59ce5a2b4..b71052c6581b 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -290,6 +290,23 @@ static struct gpio_bank gpio_bank_34xx[6] = {
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
#ifdef CONFIG_ARCH_OMAP4
@@ -2036,6 +2053,81 @@ void omap2_gpio_resume_after_retention(void)
#endif
+#ifdef CONFIG_ARCH_OMAP34XX
+/* save the registers of bank 2-6 */
+void omap_gpio_save_context(void)
+{
+ int i;
+
+ /* saving banks from 2-6 only since GPIO1 is in WKUP */
+ 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);
+ }
+}
+
+/* restore the required registers of bank 2-6 */
+void omap_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);
+ }
+}
+#endif
+
/*
* This may get called early from board specific init
* for boards that have interrupts routed via FPGA.