Merge tag 'fixes-for-v3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
 "Yes, this is a *LATE* GPIO pull request with fixes for v3.5.

  Grant moved across the planet and accidentally fell off the grid, so
  he asked me to take over the GPIO merges for a while 10 days ago.

  Since then I went over the archives and collected this pile of fixes,
  and pulled two of them from the TI maintainer Kevin Hilman.  Then
  waited for them to at least hit linux-next once or twice."

GPIO fixes for v3.5:
 - Invalid context restore on bank 0 for OMAP driver in runtime
   suspend/resume cycle
 - Check for NULL platform data in sta-2x11 driver
 - Constrain selection of the V1 MSM GPIO driver to applicable platforms
   (Kconfig issue)
 - Make sure the correct output value is set in the wm8994 driver
 - Export devm_gpio_request_one() so it can be used in modules.
   Apparently some in-kernel modules can be configured to use this
   leading to breakage.
 - Check that the GPIO is valid in the lantiq driver
 - Fix the flag bits introduced for v3.5, so they don't overlap
 - Fix a device tree intialization bug for imx21-compatible devices
 - Carry over the OF node to the TPS65910 GPIO chip struct

* tag 'fixes-for-v3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: tps65910: initialize of_node of gpio_chip
  gpio/mxc: make irqs work for fsl,imx21-gpio devices
  gpio: fix bits conflict for gpio flags
  mips: pci-lantiq: Fix check for valid gpio
  gpio: export devm_gpio_request_one
  gpiolib: wm8994: Pay attention to the value set when enabling as output
  gpio/msm_v1: CONFIG_GPIO_MSM_V1 is only available on three SoCs
  gpio-sta2x11: don't use pdata if null
  gpio/omap: fix invalid context restore of gpio bank-0
  gpio/omap: fix irq loss while in idle with debounce on

Author: torvalds

arch/mips/pci/pci-lantiq.c

@@ -129,7 +129,7 @@ static int __devinit ltq_pci_startup(struct platform_device *pdev)
 
 	/* setup reset gpio used by pci */
 	reset_gpio = of_get_named_gpio(node, "gpio-reset", 0);
-	if (reset_gpio > 0)
+	if (gpio_is_valid(reset_gpio))
 		devm_gpio_request(&pdev->dev, reset_gpio, "pci-reset");
 
 	/* enable auto-switching between PCI and EBU */
@@ -192,7 +192,7 @@ static int __devinit ltq_pci_startup(struct platform_device *pdev)
 	ltq_ebu_w32(ltq_ebu_r32(LTQ_EBU_PCC_IEN) | 0x10, LTQ_EBU_PCC_IEN);
 
 	/* toggle reset pin */
-	if (reset_gpio > 0) {
+	if (gpio_is_valid(reset_gpio)) {
 		__gpio_set_value(reset_gpio, 0);
 		wmb();
 		mdelay(1);

drivers/gpio/Kconfig

@@ -136,7 +136,7 @@ config GPIO_MPC8XXX
 
 config GPIO_MSM_V1
 	tristate "Qualcomm MSM GPIO v1"
-	depends on GPIOLIB && ARCH_MSM
+	depends on GPIOLIB && ARCH_MSM && (ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50)
 	help
 	  Say yes here to support the GPIO interface on ARM v6 based
 	  Qualcomm MSM chips.  Most of the pins on the MSM can be

drivers/gpio/devres.c

@@ -98,6 +98,7 @@ int devm_gpio_request_one(struct device *dev, unsigned gpio,
 
 	return 0;
 }
+EXPORT_SYMBOL(devm_gpio_request_one);
 
 /**
  *      devm_gpio_free - free an interrupt

drivers/gpio/gpio-mxc.c

@@ -398,10 +398,12 @@ static int __devinit mxc_gpio_probe(struct platform_device *pdev)
 	writel(~0, port->base + GPIO_ISR);
 
 	if (mxc_gpio_hwtype == IMX21_GPIO) {
-		/* setup one handler for all GPIO interrupts */
-		if (pdev->id == 0)
-			irq_set_chained_handler(port->irq,
-						mx2_gpio_irq_handler);
+		/*
+		 * Setup one handler for all GPIO interrupts. Actually setting
+		 * the handler is needed only once, but doing it for every port
+		 * is more robust and easier.
+		 */
+		irq_set_chained_handler(port->irq, mx2_gpio_irq_handler);
 	} else {
 		/* setup one handler for each entry */
 		irq_set_chained_handler(port->irq, mx3_gpio_irq_handler);

drivers/gpio/gpio-omap.c

@@ -174,12 +174,22 @@ static inline void _gpio_dbck_enable(struct gpio_bank *bank)
 	if (bank->dbck_enable_mask && !bank->dbck_enabled) {
 		clk_enable(bank->dbck);
 		bank->dbck_enabled = true;
+
+		__raw_writel(bank->dbck_enable_mask,
+			     bank->base + bank->regs->debounce_en);
 	}
 }
 
 static inline void _gpio_dbck_disable(struct gpio_bank *bank)
 {
 	if (bank->dbck_enable_mask && bank->dbck_enabled) {
+		/*
+		 * Disable debounce before cutting it's clock. If debounce is
+		 * enabled but the clock is not, GPIO module seems to be unable
+		 * to detect events and generate interrupts at least on OMAP3.
+		 */
+		__raw_writel(0, bank->base + bank->regs->debounce_en);
+
 		clk_disable(bank->dbck);
 		bank->dbck_enabled = false;
 	}
@@ -1081,7 +1091,6 @@ static int __devinit omap_gpio_probe(struct platform_device *pdev)
 	bank->is_mpuio = pdata->is_mpuio;
 	bank->non_wakeup_gpios = pdata->non_wakeup_gpios;
 	bank->loses_context = pdata->loses_context;
-	bank->get_context_loss_count = pdata->get_context_loss_count;
 	bank->regs = pdata->regs;
 #ifdef CONFIG_OF_GPIO
 	bank->chip.of_node = of_node_get(node);
@@ -1135,6 +1144,9 @@ static int __devinit omap_gpio_probe(struct platform_device *pdev)
 	omap_gpio_chip_init(bank);
 	omap_gpio_show_rev(bank);
 
+	if (bank->loses_context)
+		bank->get_context_loss_count = pdata->get_context_loss_count;
+
 	pm_runtime_put(bank->dev);
 
 	list_add_tail(&bank->node, &omap_gpio_list);

drivers/gpio/gpio-sta2x11.c

@@ -383,8 +383,9 @@ static int __devinit gsta_probe(struct platform_device *dev)
 	}
 	spin_lock_init(&chip->lock);
 	gsta_gpio_setup(chip);
-	for (i = 0; i < GSTA_NR_GPIO; i++)
-		gsta_set_config(chip, i, gpio_pdata->pinconfig[i]);
+	if (gpio_pdata)
+		for (i = 0; i < GSTA_NR_GPIO; i++)
+			gsta_set_config(chip, i, gpio_pdata->pinconfig[i]);
 
 	/* 384 was used in previous code: be compatible for other drivers */
 	err = irq_alloc_descs(-1, 384, GSTA_NR_GPIO, NUMA_NO_NODE);

drivers/gpio/gpio-tps65910.c

@@ -149,6 +149,7 @@ static int __devinit tps65910_gpio_probe(struct platform_device *pdev)
 	tps65910_gpio->gpio_chip.set	= tps65910_gpio_set;
 	tps65910_gpio->gpio_chip.get	= tps65910_gpio_get;
 	tps65910_gpio->gpio_chip.dev = &pdev->dev;
+	tps65910_gpio->gpio_chip.of_node = tps65910->dev->of_node;
 	if (pdata && pdata->gpio_base)
 		tps65910_gpio->gpio_chip.base = pdata->gpio_base;
 	else

drivers/gpio/gpio-wm8994.c

@@ -89,8 +89,11 @@ static int wm8994_gpio_direction_out(struct gpio_chip *chip,
 	struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip);
 	struct wm8994 *wm8994 = wm8994_gpio->wm8994;
 
+	if (value)
+		value = WM8994_GPN_LVL;
+
 	return wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset,
-			       WM8994_GPN_DIR, 0);
+			       WM8994_GPN_DIR | WM8994_GPN_LVL, value);
 }
 
 static void wm8994_gpio_set(struct gpio_chip *chip, unsigned offset, int value)

include/linux/gpio.h

@@ -22,8 +22,8 @@
 /* Gpio pin is open source */
 #define GPIOF_OPEN_SOURCE	(1 << 3)
 
-#define GPIOF_EXPORT		(1 << 2)
-#define GPIOF_EXPORT_CHANGEABLE	(1 << 3)
+#define GPIOF_EXPORT		(1 << 4)
+#define GPIOF_EXPORT_CHANGEABLE	(1 << 5)
 #define GPIOF_EXPORT_DIR_FIXED	(GPIOF_EXPORT)
 #define GPIOF_EXPORT_DIR_CHANGEABLE (GPIOF_EXPORT | GPIOF_EXPORT_CHANGEABLE)