diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-11 21:00:56 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-11 21:00:56 (GMT) |
commit | b0885d01f9ab1274109c02942c881d598f939623 (patch) | |
tree | 8c0e33fa141f2732a5c8e0e2db8b457d5cd865f9 /drivers/gpio/gpio-tegra.c | |
parent | bad73c5aa069f1f14cc07ce7bbae8d463635560c (diff) | |
parent | fc13d5a5b17c657b7682c145d367dcb859c507d9 (diff) | |
download | linux-fsl-qoriq-b0885d01f9ab1274109c02942c881d598f939623.tar.xz |
Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6
Pull GPIO updates from Grant Likely:
"GPIO follow up patch and type change for v3.5 merge window
Primarily device driver additions, features and bug fixes. Not much
touching gpio common subsystem support. Should not be scary."
* tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6: (34 commits)
gpio: Provide the STMPE GPIO driver with its own IRQ Domain
gpio: add TS-5500 DIO blocks support
gpio: pcf857x: use client->irq for gpio_to_irq()
gpio: stmpe: Add DT support for stmpe gpio
gpio: pl061 depends on ARM
gpio/pl061: remove old comment
gpio: SPEAr: add spi chipselect control driver
gpio: gpio-max710x: Support device tree probing
gpio: twl4030: Use only TWL4030_MODULE_LED for LED configuration
gpio: tegra: read output value when gpio is set in direction_out
gpio: pca953x: Add compatible strings to gpio-pca953x driver
gpio: pca953x: Register an IRQ domain
gpio: mvebu: Set free callback for gpio_chip
gpio: tegra: Drop exporting static functions
gpio: tegra: Staticize non-exported symbols
gpio: tegra: fix suspend/resume apis
gpio-pch: Set parent dev for gpio chip
gpio: em: Fix build errors
GPIO: clps711x: use platform_device_unregister in gpio_clps711x_init()
gpio/tc3589x: convert to use the simple irqdomain
...
Diffstat (limited to 'drivers/gpio/gpio-tegra.c')
-rw-r--r-- | drivers/gpio/gpio-tegra.c | 43 |
1 files changed, 25 insertions, 18 deletions
diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c index d982593..5389be8 100644 --- a/drivers/gpio/gpio-tegra.c +++ b/drivers/gpio/gpio-tegra.c @@ -27,6 +27,7 @@ #include <linux/module.h> #include <linux/irqdomain.h> #include <linux/pinctrl/consumer.h> +#include <linux/pm.h> #include <asm/mach/irq.h> @@ -64,7 +65,7 @@ struct tegra_gpio_bank { int bank; int irq; spinlock_t lvl_lock[4]; -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP u32 cnf[4]; u32 out[4]; u32 oe[4]; @@ -109,20 +110,18 @@ static void tegra_gpio_enable(int gpio) { tegra_gpio_mask_write(GPIO_MSK_CNF(gpio), gpio, 1); } -EXPORT_SYMBOL_GPL(tegra_gpio_enable); static void tegra_gpio_disable(int gpio) { tegra_gpio_mask_write(GPIO_MSK_CNF(gpio), gpio, 0); } -EXPORT_SYMBOL_GPL(tegra_gpio_disable); -int tegra_gpio_request(struct gpio_chip *chip, unsigned offset) +static int tegra_gpio_request(struct gpio_chip *chip, unsigned offset) { return pinctrl_request_gpio(offset); } -void tegra_gpio_free(struct gpio_chip *chip, unsigned offset) +static void tegra_gpio_free(struct gpio_chip *chip, unsigned offset) { pinctrl_free_gpio(offset); tegra_gpio_disable(offset); @@ -135,6 +134,11 @@ static void tegra_gpio_set(struct gpio_chip *chip, unsigned offset, int value) static int tegra_gpio_get(struct gpio_chip *chip, unsigned offset) { + /* If gpio is in output mode then read from the out value */ + if ((tegra_gpio_readl(GPIO_OE(offset)) >> GPIO_BIT(offset)) & 1) + return (tegra_gpio_readl(GPIO_OUT(offset)) >> + GPIO_BIT(offset)) & 0x1; + return (tegra_gpio_readl(GPIO_IN(offset)) >> GPIO_BIT(offset)) & 0x1; } @@ -285,8 +289,8 @@ static void tegra_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) } -#ifdef CONFIG_PM -void tegra_gpio_resume(void) +#ifdef CONFIG_PM_SLEEP +static int tegra_gpio_resume(struct device *dev) { unsigned long flags; int b; @@ -308,9 +312,10 @@ void tegra_gpio_resume(void) } local_irq_restore(flags); + return 0; } -void tegra_gpio_suspend(void) +static int tegra_gpio_suspend(struct device *dev) { unsigned long flags; int b; @@ -330,6 +335,7 @@ void tegra_gpio_suspend(void) } } local_irq_restore(flags); + return 0; } static int tegra_gpio_wake_enable(struct irq_data *d, unsigned int enable) @@ -345,11 +351,15 @@ static struct irq_chip tegra_gpio_irq_chip = { .irq_mask = tegra_gpio_irq_mask, .irq_unmask = tegra_gpio_irq_unmask, .irq_set_type = tegra_gpio_irq_set_type, -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP .irq_set_wake = tegra_gpio_wake_enable, #endif }; +static const struct dev_pm_ops tegra_gpio_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(tegra_gpio_suspend, tegra_gpio_resume) +}; + struct tegra_gpio_soc_config { u32 bank_stride; u32 upper_offset; @@ -380,7 +390,6 @@ static int __devinit tegra_gpio_probe(struct platform_device *pdev) { const struct of_device_id *match; struct tegra_gpio_soc_config *config; - int irq_base; struct resource *res; struct tegra_gpio_bank *bank; int gpio; @@ -417,14 +426,11 @@ static int __devinit tegra_gpio_probe(struct platform_device *pdev) return -ENODEV; } - irq_base = irq_alloc_descs(-1, 0, tegra_gpio_chip.ngpio, 0); - if (irq_base < 0) { - dev_err(&pdev->dev, "Couldn't allocate IRQ numbers\n"); - return -ENODEV; - } - irq_domain = irq_domain_add_legacy(pdev->dev.of_node, - tegra_gpio_chip.ngpio, irq_base, 0, + irq_domain = irq_domain_add_linear(pdev->dev.of_node, + tegra_gpio_chip.ngpio, &irq_domain_simple_ops, NULL); + if (!irq_domain) + return -ENODEV; for (i = 0; i < tegra_gpio_bank_count; i++) { res = platform_get_resource(pdev, IORESOURCE_IRQ, i); @@ -464,7 +470,7 @@ static int __devinit tegra_gpio_probe(struct platform_device *pdev) gpiochip_add(&tegra_gpio_chip); for (gpio = 0; gpio < tegra_gpio_chip.ngpio; gpio++) { - int irq = irq_find_mapping(irq_domain, gpio); + int irq = irq_create_mapping(irq_domain, gpio); /* No validity check; all Tegra GPIOs are valid IRQs */ bank = &tegra_gpio_banks[GPIO_BANK(gpio)]; @@ -493,6 +499,7 @@ static struct platform_driver tegra_gpio_driver = { .driver = { .name = "tegra-gpio", .owner = THIS_MODULE, + .pm = &tegra_gpio_pm_ops, .of_match_table = tegra_gpio_of_match, }, .probe = tegra_gpio_probe, |