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-rw-r--r--Documentation/gpio.txt3
-rw-r--r--drivers/gpio/Kconfig13
-rw-r--r--drivers/gpio/Makefile1
-rw-r--r--drivers/gpio/gpio-bt8xx.c12
-rw-r--r--drivers/gpio/gpio-langwell.c51
-rw-r--r--drivers/gpio/gpio-ml-ioh.c12
-rw-r--r--drivers/gpio/gpio-pch.c12
-rw-r--r--drivers/gpio/gpio-sodaville.c12
-rw-r--r--drivers/gpio/gpiolib-of.c (renamed from drivers/of/gpio.c)0
-rw-r--r--drivers/gpio/gpiolib.c12
-rw-r--r--drivers/of/Kconfig6
-rw-r--r--drivers/of/Makefile1
-rw-r--r--include/linux/gpio.h19
13 files changed, 86 insertions, 68 deletions
diff --git a/Documentation/gpio.txt b/Documentation/gpio.txt
index 620a07844e8..e08a883de36 100644
--- a/Documentation/gpio.txt
+++ b/Documentation/gpio.txt
@@ -322,6 +322,9 @@ where 'flags' is currently defined to specify the following properties:
* GPIOF_OPEN_DRAIN - gpio pin is open drain type.
* GPIOF_OPEN_SOURCE - gpio pin is open source type.
+ * GPIOF_EXPORT_DIR_FIXED - export gpio to sysfs, keep direction
+ * GPIOF_EXPORT_DIR_CHANGEABLE - also export, allow changing direction
+
since GPIOF_INIT_* are only valid when configured as output, so group valid
combinations as:
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index e03653d6935..7875c3f9366 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -37,6 +37,10 @@ menuconfig GPIOLIB
if GPIOLIB
+config OF_GPIO
+ def_bool y
+ depends on OF && !SPARC
+
config DEBUG_GPIO
bool "Debug GPIO calls"
depends on DEBUG_KERNEL
@@ -243,7 +247,7 @@ config GPIO_MC9S08DZ60
Select this to enable the MC9S08DZ60 GPIO driver
config GPIO_PCA953X
- tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
+ tristate "PCA953x, PCA955x, PCA957x, TCA64xx, and MAX7310 I/O ports"
depends on I2C
help
Say yes here to provide access to several register-oriented
@@ -252,10 +256,11 @@ config GPIO_PCA953X
4 bits: pca9536, pca9537
- 8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
- tca6408
+ 8 bits: max7310, max7315, pca6107, pca9534, pca9538, pca9554,
+ pca9556, pca9557, pca9574, tca6408
- 16 bits: pca9535, pca9539, pca9555, tca6416
+ 16 bits: max7312, max7313, pca9535, pca9539, pca9555, pca9575,
+ tca6416
config GPIO_PCA953X_IRQ
bool "Interrupt controller support for PCA953x"
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 007f54bd008..1c2f6c0a835 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -3,6 +3,7 @@
ccflags-$(CONFIG_DEBUG_GPIO) += -DDEBUG
obj-$(CONFIG_GPIOLIB) += gpiolib.o devres.o
+obj-$(CONFIG_OF_GPIO) += gpiolib-of.o
# Device drivers. Generally keep list sorted alphabetically
obj-$(CONFIG_GPIO_GENERIC) += gpio-generic.o
diff --git a/drivers/gpio/gpio-bt8xx.c b/drivers/gpio/gpio-bt8xx.c
index 5ca4098ba09..e4cc7eb69bb 100644
--- a/drivers/gpio/gpio-bt8xx.c
+++ b/drivers/gpio/gpio-bt8xx.c
@@ -328,17 +328,7 @@ static struct pci_driver bt8xxgpio_pci_driver = {
.resume = bt8xxgpio_resume,
};
-static int __init bt8xxgpio_init(void)
-{
- return pci_register_driver(&bt8xxgpio_pci_driver);
-}
-module_init(bt8xxgpio_init)
-
-static void __exit bt8xxgpio_exit(void)
-{
- pci_unregister_driver(&bt8xxgpio_pci_driver);
-}
-module_exit(bt8xxgpio_exit)
+module_pci_driver(bt8xxgpio_pci_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Michael Buesch");
diff --git a/drivers/gpio/gpio-langwell.c b/drivers/gpio/gpio-langwell.c
index 00692e89ef8..52f00d3cf66 100644
--- a/drivers/gpio/gpio-langwell.c
+++ b/drivers/gpio/gpio-langwell.c
@@ -263,6 +263,24 @@ static void lnw_irq_handler(unsigned irq, struct irq_desc *desc)
chip->irq_eoi(data);
}
+static void lnw_irq_init_hw(struct lnw_gpio *lnw)
+{
+ void __iomem *reg;
+ unsigned base;
+
+ for (base = 0; base < lnw->chip.ngpio; base += 32) {
+ /* Clear the rising-edge detect register */
+ reg = gpio_reg(&lnw->chip, base, GRER);
+ writel(0, reg);
+ /* Clear the falling-edge detect register */
+ reg = gpio_reg(&lnw->chip, base, GFER);
+ writel(0, reg);
+ /* Clear the edge detect status register */
+ reg = gpio_reg(&lnw->chip, base, GEDR);
+ writel(~0, reg);
+ }
+}
+
#ifdef CONFIG_PM
static int lnw_gpio_runtime_resume(struct device *dev)
{
@@ -306,10 +324,11 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
u32 irq_base;
u32 gpio_base;
int retval = 0;
+ int ngpio = id->driver_data;
retval = pci_enable_device(pdev);
if (retval)
- goto done;
+ return retval;
retval = pci_request_regions(pdev, "langwell_gpio");
if (retval) {
@@ -331,21 +350,28 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
/* get the register base from bar0 */
start = pci_resource_start(pdev, 0);
len = pci_resource_len(pdev, 0);
- base = ioremap_nocache(start, len);
+ base = devm_ioremap_nocache(&pdev->dev, start, len);
if (!base) {
dev_err(&pdev->dev, "error mapping bar0\n");
retval = -EFAULT;
goto err3;
}
- lnw = kzalloc(sizeof(struct lnw_gpio), GFP_KERNEL);
+ lnw = devm_kzalloc(&pdev->dev, sizeof(struct lnw_gpio), GFP_KERNEL);
if (!lnw) {
dev_err(&pdev->dev, "can't allocate langwell_gpio chip data\n");
retval = -ENOMEM;
- goto err4;
+ goto err3;
}
+
+ retval = irq_alloc_descs(-1, irq_base, ngpio, 0);
+ if (retval < 0) {
+ dev_err(&pdev->dev, "can't allocate IRQ descs\n");
+ goto err3;
+ }
+ lnw->irq_base = retval;
+
lnw->reg_base = base;
- lnw->irq_base = irq_base;
lnw->chip.label = dev_name(&pdev->dev);
lnw->chip.request = lnw_gpio_request;
lnw->chip.direction_input = lnw_gpio_direction_input;
@@ -354,15 +380,18 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
lnw->chip.set = lnw_gpio_set;
lnw->chip.to_irq = lnw_gpio_to_irq;
lnw->chip.base = gpio_base;
- lnw->chip.ngpio = id->driver_data;
+ lnw->chip.ngpio = ngpio;
lnw->chip.can_sleep = 0;
lnw->pdev = pdev;
pci_set_drvdata(pdev, lnw);
retval = gpiochip_add(&lnw->chip);
if (retval) {
dev_err(&pdev->dev, "langwell gpiochip_add error %d\n", retval);
- goto err5;
+ goto err4;
}
+
+ lnw_irq_init_hw(lnw);
+
irq_set_handler_data(pdev->irq, lnw);
irq_set_chained_handler(pdev->irq, lnw_irq_handler);
for (i = 0; i < lnw->chip.ngpio; i++) {
@@ -376,16 +405,14 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
pm_runtime_put_noidle(&pdev->dev);
pm_runtime_allow(&pdev->dev);
- goto done;
-err5:
- kfree(lnw);
+ return 0;
+
err4:
- iounmap(base);
+ irq_free_descs(lnw->irq_base, ngpio);
err3:
pci_release_regions(pdev);
err2:
pci_disable_device(pdev);
-done:
return retval;
}
diff --git a/drivers/gpio/gpio-ml-ioh.c b/drivers/gpio/gpio-ml-ioh.c
index f0febe5b822..db01f151d41 100644
--- a/drivers/gpio/gpio-ml-ioh.c
+++ b/drivers/gpio/gpio-ml-ioh.c
@@ -611,17 +611,7 @@ static struct pci_driver ioh_gpio_driver = {
.resume = ioh_gpio_resume
};
-static int __init ioh_gpio_pci_init(void)
-{
- return pci_register_driver(&ioh_gpio_driver);
-}
-module_init(ioh_gpio_pci_init);
-
-static void __exit ioh_gpio_pci_exit(void)
-{
- pci_unregister_driver(&ioh_gpio_driver);
-}
-module_exit(ioh_gpio_pci_exit);
+module_pci_driver(ioh_gpio_driver);
MODULE_DESCRIPTION("OKI SEMICONDUCTOR ML-IOH series GPIO Driver");
MODULE_LICENSE("GPL");
diff --git a/drivers/gpio/gpio-pch.c b/drivers/gpio/gpio-pch.c
index e8729cc2ba2..a05fdb6c464 100644
--- a/drivers/gpio/gpio-pch.c
+++ b/drivers/gpio/gpio-pch.c
@@ -539,17 +539,7 @@ static struct pci_driver pch_gpio_driver = {
.resume = pch_gpio_resume
};
-static int __init pch_gpio_pci_init(void)
-{
- return pci_register_driver(&pch_gpio_driver);
-}
-module_init(pch_gpio_pci_init);
-
-static void __exit pch_gpio_pci_exit(void)
-{
- pci_unregister_driver(&pch_gpio_driver);
-}
-module_exit(pch_gpio_pci_exit);
+module_pci_driver(pch_gpio_driver);
MODULE_DESCRIPTION("PCH GPIO PCI Driver");
MODULE_LICENSE("GPL");
diff --git a/drivers/gpio/gpio-sodaville.c b/drivers/gpio/gpio-sodaville.c
index 031e5d24837..820209c420e 100644
--- a/drivers/gpio/gpio-sodaville.c
+++ b/drivers/gpio/gpio-sodaville.c
@@ -282,17 +282,7 @@ static struct pci_driver sdv_gpio_driver = {
.remove = sdv_gpio_remove,
};
-static int __init sdv_gpio_init(void)
-{
- return pci_register_driver(&sdv_gpio_driver);
-}
-module_init(sdv_gpio_init);
-
-static void __exit sdv_gpio_exit(void)
-{
- pci_unregister_driver(&sdv_gpio_driver);
-}
-module_exit(sdv_gpio_exit);
+module_pci_driver(sdv_gpio_driver);
MODULE_AUTHOR("Hans J. Koch <hjk@linutronix.de>");
MODULE_DESCRIPTION("GPIO interface for Intel Sodaville SoCs");
diff --git a/drivers/of/gpio.c b/drivers/gpio/gpiolib-of.c
index bf984b6dc47..bf984b6dc47 100644
--- a/drivers/of/gpio.c
+++ b/drivers/gpio/gpiolib-of.c
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 5a75510d66b..566d0122d83 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1302,8 +1302,18 @@ int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
(flags & GPIOF_INIT_HIGH) ? 1 : 0);
if (err)
- gpio_free(gpio);
+ goto free_gpio;
+
+ if (flags & GPIOF_EXPORT) {
+ err = gpio_export(gpio, flags & GPIOF_EXPORT_CHANGEABLE);
+ if (err)
+ goto free_gpio;
+ }
+
+ return 0;
+ free_gpio:
+ gpio_free(gpio);
return err;
}
EXPORT_SYMBOL_GPL(gpio_request_one);
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig
index 8e84ce9765a..ce00d11144d 100644
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -51,12 +51,6 @@ config OF_IRQ
config OF_DEVICE
def_bool y
-config OF_GPIO
- def_bool y
- depends on GPIOLIB && !SPARC
- help
- OpenFirmware GPIO accessors
-
config OF_I2C
def_tristate I2C
depends on I2C && !SPARC
diff --git a/drivers/of/Makefile b/drivers/of/Makefile
index aa90e602c8a..aff2c623039 100644
--- a/drivers/of/Makefile
+++ b/drivers/of/Makefile
@@ -4,7 +4,6 @@ obj-$(CONFIG_OF_PROMTREE) += pdt.o
obj-$(CONFIG_OF_ADDRESS) += address.o
obj-$(CONFIG_OF_IRQ) += irq.o
obj-$(CONFIG_OF_DEVICE) += device.o platform.o
-obj-$(CONFIG_OF_GPIO) += gpio.o
obj-$(CONFIG_OF_I2C) += of_i2c.o
obj-$(CONFIG_OF_NET) += of_net.o
obj-$(CONFIG_OF_SPI) += of_spi.o
diff --git a/include/linux/gpio.h b/include/linux/gpio.h
index 6155ecf192b..d1890d46b6c 100644
--- a/include/linux/gpio.h
+++ b/include/linux/gpio.h
@@ -20,6 +20,11 @@
/* 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_DIR_FIXED (GPIOF_EXPORT)
+#define GPIOF_EXPORT_DIR_CHANGEABLE (GPIOF_EXPORT | GPIOF_EXPORT_CHANGEABLE)
+
/**
* struct gpio - a structure describing a GPIO with configuration
* @gpio: the GPIO number
@@ -55,6 +60,12 @@ static inline int gpio_request(unsigned gpio, const char *label)
return -ENOSYS;
}
+static inline int devm_gpio_request(struct device *dev, unsigned gpio,
+ const char *label)
+{
+ return -ENOSYS;
+}
+
static inline int gpio_request_one(unsigned gpio,
unsigned long flags, const char *label)
{
@@ -74,6 +85,14 @@ static inline void gpio_free(unsigned gpio)
WARN_ON(1);
}
+static inline void devm_gpio_free(struct device *dev, unsigned gpio)
+{
+ might_sleep();
+
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+}
+
static inline void gpio_free_array(const struct gpio *array, size_t num)
{
might_sleep();
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-15 20:50:27 +0000