Merge branch 'gpio-2.6.35' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm into omap-for-linus

4 files changed, 53 insertions, 136 deletions

diff --git a/arch/arm/mach-omap2/pm24xx.c b/arch/arm/mach-omap2/pm24xx.c
index 374299ea7ad..7816c4e84a3 100644
--- a/arch/arm/mach-omap2/pm24xx.c
+++ b/arch/arm/mach-omap2/pm24xx.c
@@ -107,7 +107,7 @@ static void omap2_enter_full_retention(void)
 	l = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0) | OMAP24XX_USBSTANDBYCTRL;
 	omap_ctrl_writel(l, OMAP2_CONTROL_DEVCONF0);
 
-	omap2_gpio_prepare_for_retention();
+	omap2_gpio_prepare_for_idle(PWRDM_POWER_RET);
 
 	if (omap2_pm_debug) {
 		omap2_pm_dump(0, 0, 0);
@@ -141,7 +141,7 @@ no_sleep:
 		tmp = timespec_to_ns(&ts_idle) * NSEC_PER_USEC;
 		omap2_pm_dump(0, 1, tmp);
 	}
-	omap2_gpio_resume_after_retention();
+	omap2_gpio_resume_after_idle();
 
 	clk_enable(osc_ck);
 
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index ea0000bc535..468e1e3321e 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -376,7 +376,7 @@ void omap_sram_idle(void)
 	core_next_state = pwrdm_read_next_pwrst(core_pwrdm);
 	if (per_next_state < PWRDM_POWER_ON) {
 		omap_uart_prepare_idle(2);
-		omap2_gpio_prepare_for_retention();
+		omap2_gpio_prepare_for_idle(per_next_state);
 		if (per_next_state == PWRDM_POWER_OFF) {
 			if (core_next_state == PWRDM_POWER_ON) {
 				per_next_state = PWRDM_POWER_RET;
@@ -454,9 +454,9 @@ void omap_sram_idle(void)
 	/* PER */
 	if (per_next_state < PWRDM_POWER_ON) {
 		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();
-		omap2_gpio_resume_after_retention();
 		omap_uart_resume_idle(2);
 		if (per_state_modified)
 			pwrdm_set_next_pwrst(per_pwrdm, PWRDM_POWER_OFF);
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index 45a225d0912..955597fd6d3 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -27,6 +27,7 @@
 #include <mach/irqs.h>
 #include <mach/gpio.h>
 #include <asm/mach/irq.h>
+#include <plat/powerdomain.h>
 
 /*
  * OMAP1510 GPIO registers
@@ -195,6 +196,7 @@ struct gpio_bank {
 	struct gpio_chip chip;
 	struct clk *dbck;
 	u32 mod_usage;
+	u32 dbck_enable_mask;
 };
 
 #define METHOD_MPUIO		0
@@ -303,8 +305,6 @@ struct omap3_gpio_regs {
 	u32 risingdetect;
 	u32 fallingdetect;
 	u32 dataout;
-	u32 setwkuena;
-	u32 setdataout;
 };
 
 static struct omap3_gpio_regs gpio_context[OMAP34XX_NR_GPIOS];
@@ -646,6 +646,7 @@ void omap_set_gpio_debounce(int gpio, int enable)
 		goto done;
 
 	if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
+		bank->dbck_enable_mask = val;
 		if (enable)
 			clk_enable(bank->dbck);
 		else
@@ -724,15 +725,27 @@ static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio,
 							 OMAP4_GPIO_IRQWAKEN0);
 			}
 		} else {
-			if (trigger != 0)
+			/*
+			 * GPIO wakeup request can only be generated on edge
+			 * transitions
+			 */
+			if (trigger & IRQ_TYPE_EDGE_BOTH)
 				__raw_writel(1 << gpio, bank->base
 					+ OMAP24XX_GPIO_SETWKUENA);
 			else
 				__raw_writel(1 << gpio, bank->base
 					+ OMAP24XX_GPIO_CLEARWKUENA);
 		}
-	} else {
-		if (trigger != 0)
+	}
+	/* This part needs to be executed always for OMAP34xx */
+	if (cpu_is_omap34xx() || (bank->non_wakeup_gpios & gpio_bit)) {
+		/*
+		 * Log the edge gpio and manually trigger the IRQ
+		 * after resume if the input level changes
+		 * to avoid irq lost during PER RET/OFF mode
+		 * Applies for omap2 non-wakeup gpio and all omap3 gpios
+		 */
+		if (trigger & IRQ_TYPE_EDGE_BOTH)
 			bank->enabled_non_wakeup_gpios |= gpio_bit;
 		else
 			bank->enabled_non_wakeup_gpios &= ~gpio_bit;
@@ -1845,7 +1858,8 @@ static int __init _omap_gpio_init(void)
 				__raw_writel(0, bank->base +
 						OMAP24XX_GPIO_CTRL);
 			}
-			if (i < ARRAY_SIZE(non_wakeup_gpios))
+			if (cpu_is_omap24xx() &&
+			    i < ARRAY_SIZE(non_wakeup_gpios))
 				bank->non_wakeup_gpios = non_wakeup_gpios[i];
 			gpio_count = 32;
 		}
@@ -2028,16 +2042,27 @@ static struct sys_device omap_gpio_device = {
 
 static int workaround_enabled;
 
-void omap2_gpio_prepare_for_retention(void)
+void omap2_gpio_prepare_for_idle(int power_state)
 {
 	int i, c = 0;
+	int min = 0;
 
-	/* Remove triggering for all non-wakeup GPIOs.  Otherwise spurious
-	 * IRQs will be generated.  See OMAP2420 Errata item 1.101. */
-	for (i = 0; i < gpio_bank_count; i++) {
+	if (cpu_is_omap34xx())
+		min = 1;
+
+	for (i = min; i < gpio_bank_count; i++) {
 		struct gpio_bank *bank = &gpio_bank[i];
 		u32 l1, l2;
 
+		if (bank->dbck_enable_mask)
+			clk_disable(bank->dbck);
+
+		if (power_state > PWRDM_POWER_OFF)
+			continue;
+
+		/* If going to OFF, remove triggering for all
+		 * non-wakeup GPIOs.  Otherwise spurious IRQs will be
+		 * generated.  See OMAP2420 Errata item 1.101. */
 		if (!(bank->enabled_non_wakeup_gpios))
 			continue;
 
@@ -2085,16 +2110,23 @@ void omap2_gpio_prepare_for_retention(void)
 	workaround_enabled = 1;
 }
 
-void omap2_gpio_resume_after_retention(void)
+void omap2_gpio_resume_after_idle(void)
 {
 	int i;
+	int min = 0;
 
-	if (!workaround_enabled)
-		return;
-	for (i = 0; i < gpio_bank_count; i++) {
+	if (cpu_is_omap34xx())
+		min = 1;
+	for (i = min; i < gpio_bank_count; i++) {
 		struct gpio_bank *bank = &gpio_bank[i];
 		u32 l, gen, gen0, gen1;
 
+		if (bank->dbck_enable_mask)
+			clk_enable(bank->dbck);
+
+		if (!workaround_enabled)
+			continue;
+
 		if (!(bank->enabled_non_wakeup_gpios))
 			continue;
 
@@ -2119,7 +2151,7 @@ void omap2_gpio_resume_after_retention(void)
 		 * horribly racy, but it's the best we can do to work around
 		 * this silicon bug. */
 		l ^= bank->saved_datain;
-		l &= bank->non_wakeup_gpios;
+		l &= bank->enabled_non_wakeup_gpios;
 
 		/*
 		 * No need to generate IRQs for the rising edge for gpio IRQs
@@ -2207,10 +2239,6 @@ void omap_gpio_save_context(void)
 			__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);
 	}
 }
 
@@ -2243,10 +2271,6 @@ void omap_gpio_restore_context(void)
 				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
@@ -2286,110 +2310,3 @@ static int __init omap_gpio_sysinit(void)
 }
 
 arch_initcall(omap_gpio_sysinit);
-
-
-#ifdef	CONFIG_DEBUG_FS
-
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-
-static int dbg_gpio_show(struct seq_file *s, void *unused)
-{
-	unsigned	i, j, gpio;
-
-	for (i = 0, gpio = 0; i < gpio_bank_count; i++) {
-		struct gpio_bank	*bank = gpio_bank + i;
-		unsigned		bankwidth = 16;
-		u32			mask = 1;
-
-		if (bank_is_mpuio(bank))
-			gpio = OMAP_MPUIO(0);
-		else if (cpu_class_is_omap2() || cpu_is_omap7xx())
-			bankwidth = 32;
-
-		for (j = 0; j < bankwidth; j++, gpio++, mask <<= 1) {
-			unsigned	irq, value, is_in, irqstat;
-			const char	*label;
-
-			label = gpiochip_is_requested(&bank->chip, j);
-			if (!label)
-				continue;
-
-			irq = bank->virtual_irq_start + j;
-			value = gpio_get_value(gpio);
-			is_in = gpio_is_input(bank, mask);
-
-			if (bank_is_mpuio(bank))
-				seq_printf(s, "MPUIO %2d ", j);
-			else
-				seq_printf(s, "GPIO %3d ", gpio);
-			seq_printf(s, "(%-20.20s): %s %s",
-					label,
-					is_in ? "in " : "out",
-					value ? "hi"  : "lo");
-
-/* FIXME for at least omap2, show pullup/pulldown state */
-
-			irqstat = irq_desc[irq].status;
-#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS)
-			if (is_in && ((bank->suspend_wakeup & mask)
-					|| irqstat & IRQ_TYPE_SENSE_MASK)) {
-				char	*trigger = NULL;
-
-				switch (irqstat & IRQ_TYPE_SENSE_MASK) {
-				case IRQ_TYPE_EDGE_FALLING:
-					trigger = "falling";
-					break;
-				case IRQ_TYPE_EDGE_RISING:
-					trigger = "rising";
-					break;
-				case IRQ_TYPE_EDGE_BOTH:
-					trigger = "bothedge";
-					break;
-				case IRQ_TYPE_LEVEL_LOW:
-					trigger = "low";
-					break;
-				case IRQ_TYPE_LEVEL_HIGH:
-					trigger = "high";
-					break;
-				case IRQ_TYPE_NONE:
-					trigger = "(?)";
-					break;
-				}
-				seq_printf(s, ", irq-%d %-8s%s",
-						irq, trigger,
-						(bank->suspend_wakeup & mask)
-							? " wakeup" : "");
-			}
-#endif
-			seq_printf(s, "\n");
-		}
-
-		if (bank_is_mpuio(bank)) {
-			seq_printf(s, "\n");
-			gpio = 0;
-		}
-	}
-	return 0;
-}
-
-static int dbg_gpio_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, dbg_gpio_show, &inode->i_private);
-}
-
-static const struct file_operations debug_fops = {
-	.open		= dbg_gpio_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-static int __init omap_gpio_debuginit(void)
-{
-	(void) debugfs_create_file("omap_gpio", S_IRUGO,
-					NULL, NULL, &debug_fops);
-	return 0;
-}
-late_initcall(omap_gpio_debuginit);
-#endif
diff --git a/arch/arm/plat-omap/include/plat/gpio.h b/arch/arm/plat-omap/include/plat/gpio.h
index de7c54731cb..de1c604962e 100644
--- a/arch/arm/plat-omap/include/plat/gpio.h
+++ b/arch/arm/plat-omap/include/plat/gpio.h
@@ -72,8 +72,8 @@
 				 IH_GPIO_BASE + (nr))
 
 extern int omap_gpio_init(void);	/* Call from board init only */
-extern void omap2_gpio_prepare_for_retention(void);
-extern void omap2_gpio_resume_after_retention(void);
+extern void omap2_gpio_prepare_for_idle(int power_state);
+extern void omap2_gpio_resume_after_idle(void);
 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);