diff mbox

[4/5] OMAP: GPIO: call save/restore ctxt from GPIO driver

Message ID 1298890670-5481-5-git-send-email-charu@ti.com (mailing list archive)
State Changes Requested, archived
Delegated to: Tony Lindgren
Headers show

Commit Message

charu@ti.com Feb. 28, 2011, 10:57 a.m. UTC 
None
diff mbox

Patch

diff --git a/arch/arm/mach-omap2/pm24xx.c b/arch/arm/mach-omap2/pm24xx.c
index 97feb3a..b71072d 100644
--- a/arch/arm/mach-omap2/pm24xx.c
+++ b/arch/arm/mach-omap2/pm24xx.c
@@ -162,7 +162,7 @@  no_sleep:
 		tmp = timespec_to_ns(&ts_idle) * NSEC_PER_USEC;
 		omap2_pm_dump(0, 1, tmp);
 	}
-	omap2_gpio_resume_after_idle();
+	omap2_gpio_resume_after_idle(0);
 
 	clk_enable(osc_ck);
 
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 2f864e4..07af07e 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -90,16 +90,6 @@  static struct powerdomain *mpu_pwrdm, *neon_pwrdm;
 static struct powerdomain *core_pwrdm, *per_pwrdm;
 static struct powerdomain *cam_pwrdm;
 
-static inline void omap3_per_save_context(void)
-{
-	omap_gpio_save_context();
-}
-
-static inline void omap3_per_restore_context(void)
-{
-	omap_gpio_restore_context();
-}
-
 static void omap3_enable_io_chain(void)
 {
 	int timeout = 0;
@@ -408,8 +398,6 @@  void omap_sram_idle(void)
 		omap_uart_prepare_idle(2);
 		omap_uart_prepare_idle(3);
 		omap2_gpio_prepare_for_idle(per_going_off);
-		if (per_next_state == PWRDM_POWER_OFF)
-				omap3_per_save_context();
 	}
 
 	/* CORE */
@@ -473,10 +461,12 @@  void omap_sram_idle(void)
 
 	/* PER */
 	if (per_next_state < PWRDM_POWER_ON) {
+		int is_per_prev_state_off;
+
 		per_prev_state = pwrdm_read_prev_pwrst(per_pwrdm);
-		omap2_gpio_resume_after_idle();
-		if (per_prev_state == PWRDM_POWER_OFF)
-			omap3_per_restore_context();
+		is_per_prev_state_off = (per_prev_state ==
+						PWRDM_POWER_OFF) ? 1 : 0;
+		omap2_gpio_resume_after_idle(is_per_prev_state_off);
 		omap_uart_resume_idle(2);
 		omap_uart_resume_idle(3);
 	}
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index 1da3233..10792b6 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -175,6 +175,9 @@  struct gpio_bank {
 	const char *pwrdm_name;
 };
 
+static void omap_gpio_save_context(struct gpio_bank *bank);
+static void omap_gpio_restore_context(struct gpio_bank *bank);
+
 /*
  * TODO: Cleanup gpio_bank usage as it is having information
  * related to all instances of the device
@@ -1860,8 +1863,6 @@  static struct sys_device omap_gpio_device = {
 
 #endif
 
-#ifdef CONFIG_ARCH_OMAP2PLUS
-
 static int workaround_enabled;
 
 void omap2_gpio_prepare_for_idle(int off_mode)
@@ -1873,6 +1874,10 @@  void omap2_gpio_prepare_for_idle(int off_mode)
 		u32 l1 = 0, l2 = 0;
 		int j;
 
+		/* If the gpio bank is not used, do nothing */
+		if (!bank->mod_usage)
+			continue;
+
 		if (!strcmp(bank->pwrdm_name, "wkup_pwrdm"))
 			continue;
 
@@ -1882,22 +1887,22 @@  void omap2_gpio_prepare_for_idle(int off_mode)
 		if (!off_mode)
 			continue;
 
-		/* If going to OFF, remove triggering for all
+		/*
+		 * If going to OFF, remove triggering for all
 		 * non-wakeup GPIOs.  Otherwise spurious IRQs will be
-		 * generated.  See OMAP2420 Errata item 1.101. */
+		 * generated.  See OMAP2420 Errata item 1.101.
+		 */
 		if (!(bank->enabled_non_wakeup_gpios))
-			continue;
+			goto save_gpio_ctx;
 
-		if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
+		if (bank->method == METHOD_GPIO_24XX) {
 			bank->saved_datain = __raw_readl(bank->base +
 					OMAP24XX_GPIO_DATAIN);
 			l1 = __raw_readl(bank->base +
 					OMAP24XX_GPIO_FALLINGDETECT);
 			l2 = __raw_readl(bank->base +
 					OMAP24XX_GPIO_RISINGDETECT);
-		}
-
-		if (cpu_is_omap44xx()) {
+		} else if (bank->method == METHOD_GPIO_44XX) {
 			bank->saved_datain = __raw_readl(bank->base +
 						OMAP4_GPIO_DATAIN);
 			l1 = __raw_readl(bank->base +
@@ -1911,19 +1916,20 @@  void omap2_gpio_prepare_for_idle(int off_mode)
 		l1 &= ~bank->enabled_non_wakeup_gpios;
 		l2 &= ~bank->enabled_non_wakeup_gpios;
 
-		if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
+		if (bank->method == METHOD_GPIO_24XX) {
 			__raw_writel(l1, bank->base +
 					OMAP24XX_GPIO_FALLINGDETECT);
 			__raw_writel(l2, bank->base +
 					OMAP24XX_GPIO_RISINGDETECT);
-		}
-
-		if (cpu_is_omap44xx()) {
+		} else if (bank->method == METHOD_GPIO_44XX) {
 			__raw_writel(l1, bank->base + OMAP4_GPIO_FALLINGDETECT);
 			__raw_writel(l2, bank->base + OMAP4_GPIO_RISINGDETECT);
 		}
 
 		c++;
+
+save_gpio_ctx:
+		omap_gpio_save_context(bank);
 	}
 	if (!c) {
 		workaround_enabled = 0;
@@ -1932,7 +1938,7 @@  void omap2_gpio_prepare_for_idle(int off_mode)
 	workaround_enabled = 1;
 }
 
-void omap2_gpio_resume_after_idle(void)
+void omap2_gpio_resume_after_idle(int off_mode)
 {
 	int i;
 
@@ -1941,27 +1947,32 @@  void omap2_gpio_resume_after_idle(void)
 		u32 l = 0, gen, gen0, gen1;
 		int j;
 
+		/* If the gpio bank is not used, do nothing */
+		if (!bank->mod_usage)
+			continue;
+
 		if (!strcmp(bank->pwrdm_name, "wkup_pwrdm"))
 			continue;
 
 		for (j = 0; j < hweight_long(bank->dbck_enable_mask); j++)
 			clk_enable(bank->dbck);
 
-		if (!workaround_enabled)
+		if (!off_mode)
 			continue;
 
+		if (!workaround_enabled)
+			goto restore_gpio_ctx;
+
 		if (!(bank->enabled_non_wakeup_gpios))
-			continue;
+			goto restore_gpio_ctx;
 
-		if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
+		if (bank->method == METHOD_GPIO_24XX) {
 			__raw_writel(bank->saved_fallingdetect,
 				 bank->base + OMAP24XX_GPIO_FALLINGDETECT);
 			__raw_writel(bank->saved_risingdetect,
 				 bank->base + OMAP24XX_GPIO_RISINGDETECT);
 			l = __raw_readl(bank->base + OMAP24XX_GPIO_DATAIN);
-		}
-
-		if (cpu_is_omap44xx()) {
+		} else if (bank->method == METHOD_GPIO_44XX) {
 			__raw_writel(bank->saved_fallingdetect,
 				 bank->base + OMAP4_GPIO_FALLINGDETECT);
 			__raw_writel(bank->saved_risingdetect,
@@ -1969,10 +1980,12 @@  void omap2_gpio_resume_after_idle(void)
 			l = __raw_readl(bank->base + OMAP4_GPIO_DATAIN);
 		}
 
-		/* Check if any of the non-wakeup interrupt GPIOs have changed
+		/*
+		 * Check if any of the non-wakeup interrupt GPIOs have changed
 		 * state.  If so, generate an IRQ by software.  This is
 		 * horribly racy, but it's the best we can do to work around
-		 * this silicon bug. */
+		 * this silicon bug.
+		 */
 		l ^= bank->saved_datain;
 		l &= bank->enabled_non_wakeup_gpios;
 
@@ -1995,7 +2008,7 @@  void omap2_gpio_resume_after_idle(void)
 		if (gen) {
 			u32 old0, old1;
 
-			if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
+			if (bank->method == METHOD_GPIO_24XX) {
 				old0 = __raw_readl(bank->base +
 					OMAP24XX_GPIO_LEVELDETECT0);
 				old1 = __raw_readl(bank->base +
@@ -2008,9 +2021,7 @@  void omap2_gpio_resume_after_idle(void)
 					OMAP24XX_GPIO_LEVELDETECT0);
 				__raw_writel(old1, bank->base +
 					OMAP24XX_GPIO_LEVELDETECT1);
-			}
-
-			if (cpu_is_omap44xx()) {
+			} else if (bank->method == METHOD_GPIO_44XX) {
 				old0 = __raw_readl(bank->base +
 						OMAP4_GPIO_LEVELDETECT0);
 				old1 = __raw_readl(bank->base +
@@ -2025,121 +2036,104 @@  void omap2_gpio_resume_after_idle(void)
 						OMAP4_GPIO_LEVELDETECT1);
 			}
 		}
+
+restore_gpio_ctx:
+		omap_gpio_restore_context(bank);
 	}
 
 }
 
-#endif
-
-void omap_gpio_save_context(void)
+void omap_gpio_save_context(struct gpio_bank *bank)
 {
-	int i;
-
-	for (i = 0; i < gpio_bank_count; i++) {
-		struct gpio_bank *bank = &gpio_bank[i];
-
-		if (!strcmp(bank->pwrdm_name, "wkup_pwrdm"))
-			continue;
-
-		if (bank->method == METHOD_GPIO_24XX) {
-			bank->context.irqenable1 = __raw_readl(
+	if (bank->method == METHOD_GPIO_24XX) {
+		bank->context.irqenable1 = __raw_readl(
 					bank->base + OMAP24XX_GPIO_IRQENABLE1);
-			bank->context.irqenable2 = __raw_readl(
+		bank->context.irqenable2 = __raw_readl(
 					bank->base + OMAP24XX_GPIO_IRQENABLE2);
-			bank->context.wake_en = __raw_readl(
+		bank->context.wake_en = __raw_readl(
 					bank->base + OMAP24XX_GPIO_WAKE_EN);
-			bank->context.ctrl = __raw_readl(
+		bank->context.ctrl = __raw_readl(
 					bank->base + OMAP24XX_GPIO_CTRL);
-			bank->context.oe = __raw_readl(
+		bank->context.oe = __raw_readl(
 					bank->base + OMAP24XX_GPIO_OE);
-			bank->context.leveldetect0 = __raw_readl(bank->base +
+		bank->context.leveldetect0 = __raw_readl(bank->base +
 					OMAP24XX_GPIO_LEVELDETECT0);
-			bank->context.leveldetect1 = __raw_readl(bank->base +
+		bank->context.leveldetect1 = __raw_readl(bank->base +
 					OMAP24XX_GPIO_LEVELDETECT1);
-			bank->context.risingdetect = __raw_readl(bank->base +
+		bank->context.risingdetect = __raw_readl(bank->base +
 					OMAP24XX_GPIO_RISINGDETECT);
-			bank->context.fallingdetect = __raw_readl(bank->base +
+		bank->context.fallingdetect = __raw_readl(bank->base +
 					OMAP24XX_GPIO_FALLINGDETECT);
-			bank->context.dataout = __raw_readl(
+		bank->context.dataout = __raw_readl(
 					bank->base + OMAP24XX_GPIO_DATAOUT);
-		} else if (bank->method == METHOD_GPIO_44XX) {
-			bank->context.irqenable1 = __raw_readl(
+	} else if (bank->method == METHOD_GPIO_44XX) {
+		bank->context.irqenable1 = __raw_readl(
 					bank->base + OMAP4_GPIO_IRQSTATUSSET0);
-			bank->context.irqenable2 = __raw_readl(
+		bank->context.irqenable2 = __raw_readl(
 					bank->base + OMAP4_GPIO_IRQSTATUSSET1);
-			bank->context.wake_en = __raw_readl(
+		bank->context.wake_en = __raw_readl(
 					bank->base + OMAP4_GPIO_IRQWAKEN0);
-			bank->context.ctrl = __raw_readl(
+		bank->context.ctrl = __raw_readl(
 					bank->base + OMAP4_GPIO_CTRL);
-			bank->context.oe = __raw_readl(
+		bank->context.oe = __raw_readl(
 					bank->base + OMAP24XX_GPIO_OE);
-			bank->context.leveldetect0 = __raw_readl(bank->base +
+		bank->context.leveldetect0 = __raw_readl(bank->base +
 					OMAP4_GPIO_LEVELDETECT0);
-			bank->context.leveldetect1 = __raw_readl(bank->base +
+		bank->context.leveldetect1 = __raw_readl(bank->base +
 					OMAP4_GPIO_LEVELDETECT1);
-			bank->context.risingdetect = __raw_readl(bank->base +
+		bank->context.risingdetect = __raw_readl(bank->base +
 					OMAP4_GPIO_RISINGDETECT);
-			bank->context.fallingdetect = __raw_readl(bank->base +
+		bank->context.fallingdetect = __raw_readl(bank->base +
 					OMAP4_GPIO_FALLINGDETECT);
-			bank->context.dataout = __raw_readl(
+		bank->context.dataout = __raw_readl(
 					bank->base + OMAP4_GPIO_DATAOUT);
-		}
 	}
 }
 
-void omap_gpio_restore_context(void)
+void omap_gpio_restore_context(struct gpio_bank *bank)
 {
-	int i;
-
-	for (i = 0; i < gpio_bank_count; i++) {
-		struct gpio_bank *bank = &gpio_bank[i];
-
-		if (!strcmp(bank->pwrdm_name, "wkup_pwrdm"))
-			continue;
-
-		if (bank->method == METHOD_GPIO_24XX) {
-			__raw_writel(bank->context.irqenable1, bank->base +
-						OMAP24XX_GPIO_IRQENABLE1);
-			__raw_writel(bank->context.irqenable2, bank->base +
-						OMAP24XX_GPIO_IRQENABLE2);
-			__raw_writel(bank->context.wake_en, bank->base +
-						OMAP24XX_GPIO_WAKE_EN);
-			__raw_writel(bank->context.ctrl, bank->base +
-						OMAP24XX_GPIO_CTRL);
-			__raw_writel(bank->context.oe, bank->base +
-						OMAP24XX_GPIO_OE);
-			__raw_writel(bank->context.leveldetect0, bank->base +
-						OMAP24XX_GPIO_LEVELDETECT0);
-			__raw_writel(bank->context.leveldetect1, bank->base +
-						OMAP24XX_GPIO_LEVELDETECT1);
-			__raw_writel(bank->context.risingdetect, bank->base +
-						OMAP24XX_GPIO_RISINGDETECT);
-			__raw_writel(bank->context.fallingdetect, bank->base +
-						OMAP24XX_GPIO_FALLINGDETECT);
-			__raw_writel(bank->context.dataout, bank->base +
-						OMAP24XX_GPIO_DATAOUT);
-		} else if (bank->method == METHOD_GPIO_44XX) {
-			__raw_writel(bank->context.irqenable1, bank->base +
-						OMAP4_GPIO_IRQSTATUSSET0);
-			__raw_writel(bank->context.irqenable2, bank->base +
-						OMAP4_GPIO_IRQSTATUSSET1);
-			__raw_writel(bank->context.wake_en, bank->base +
-						OMAP4_GPIO_IRQWAKEN0);
-			__raw_writel(bank->context.ctrl, bank->base +
-						OMAP4_GPIO_CTRL);
-			__raw_writel(bank->context.oe, bank->base +
-						OMAP24XX_GPIO_OE);
-			__raw_writel(bank->context.leveldetect0, bank->base +
-						OMAP4_GPIO_LEVELDETECT0);
-			__raw_writel(bank->context.leveldetect1, bank->base +
-						OMAP4_GPIO_LEVELDETECT1);
-			__raw_writel(bank->context.risingdetect, bank->base +
-						OMAP4_GPIO_RISINGDETECT);
-			__raw_writel(bank->context.fallingdetect, bank->base +
-						OMAP4_GPIO_FALLINGDETECT);
-			__raw_writel(bank->context.dataout, bank->base +
-						OMAP4_GPIO_DATAOUT);
-		}
+	if (bank->method == METHOD_GPIO_24XX) {
+		__raw_writel(bank->context.irqenable1, bank->base +
+					OMAP24XX_GPIO_IRQENABLE1);
+		__raw_writel(bank->context.irqenable2, bank->base +
+					OMAP24XX_GPIO_IRQENABLE2);
+		__raw_writel(bank->context.wake_en, bank->base +
+					OMAP24XX_GPIO_WAKE_EN);
+		__raw_writel(bank->context.ctrl, bank->base +
+					OMAP24XX_GPIO_CTRL);
+		__raw_writel(bank->context.oe, bank->base +
+					OMAP24XX_GPIO_OE);
+		__raw_writel(bank->context.leveldetect0, bank->base +
+					OMAP24XX_GPIO_LEVELDETECT0);
+		__raw_writel(bank->context.leveldetect1, bank->base +
+					OMAP24XX_GPIO_LEVELDETECT1);
+		__raw_writel(bank->context.risingdetect, bank->base +
+					OMAP24XX_GPIO_RISINGDETECT);
+		__raw_writel(bank->context.fallingdetect, bank->base +
+					OMAP24XX_GPIO_FALLINGDETECT);
+		__raw_writel(bank->context.dataout, bank->base +
+					OMAP24XX_GPIO_DATAOUT);
+	} else if (bank->method == METHOD_GPIO_44XX) {
+		__raw_writel(bank->context.irqenable1, bank->base +
+					OMAP4_GPIO_IRQSTATUSSET0);
+		__raw_writel(bank->context.irqenable2, bank->base +
+					OMAP4_GPIO_IRQSTATUSSET1);
+		__raw_writel(bank->context.wake_en, bank->base +
+					OMAP4_GPIO_IRQWAKEN0);
+		__raw_writel(bank->context.ctrl, bank->base +
+					OMAP4_GPIO_CTRL);
+		__raw_writel(bank->context.oe, bank->base +
+					OMAP24XX_GPIO_OE);
+		__raw_writel(bank->context.leveldetect0, bank->base +
+					OMAP4_GPIO_LEVELDETECT0);
+		__raw_writel(bank->context.leveldetect1, bank->base +
+					OMAP4_GPIO_LEVELDETECT1);
+		__raw_writel(bank->context.risingdetect, bank->base +
+					OMAP4_GPIO_RISINGDETECT);
+		__raw_writel(bank->context.fallingdetect, bank->base +
+					OMAP4_GPIO_FALLINGDETECT);
+		__raw_writel(bank->context.dataout, bank->base +
+					OMAP4_GPIO_DATAOUT);
 	}
 }
 
diff --git a/arch/arm/plat-omap/include/plat/gpio.h b/arch/arm/plat-omap/include/plat/gpio.h
index 2c46caa..00a9d02 100644
--- a/arch/arm/plat-omap/include/plat/gpio.h
+++ b/arch/arm/plat-omap/include/plat/gpio.h
@@ -84,11 +84,9 @@  struct omap_gpio_platform_data {
 extern int gpio_bank_count;
 
 extern void omap2_gpio_prepare_for_idle(int off_mode);
-extern void omap2_gpio_resume_after_idle(void);
+extern void omap2_gpio_resume_after_idle(int off_mode);
 extern void omap_set_gpio_debounce(int gpio, int enable);
 extern void omap_set_gpio_debounce_time(int gpio, int enable);
-extern void omap_gpio_save_context(void);
-extern void omap_gpio_restore_context(void);
 /*-------------------------------------------------------------------------*/
 
 /* Wrappers for "new style" GPIO calls, using the new infrastructure