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-rw-r--r--drivers/gpio/Kconfig30
-rw-r--r--drivers/gpio/Makefile2
-rw-r--r--drivers/gpio/devres.c29
-rw-r--r--drivers/gpio/gpio-bt8xx.c12
-rw-r--r--drivers/gpio/gpio-langwell.c91
-rw-r--r--drivers/gpio/gpio-lpc32xx.c52
-rw-r--r--drivers/gpio/gpio-mcp23s08.c2
-rw-r--r--drivers/gpio/gpio-ml-ioh.c12
-rw-r--r--drivers/gpio/gpio-mpc8xxx.c3
-rw-r--r--drivers/gpio/gpio-msic.c339
-rw-r--r--drivers/gpio/gpio-pca953x.c43
-rw-r--r--drivers/gpio/gpio-pch.c12
-rw-r--r--drivers/gpio/gpio-samsung.c403
-rw-r--r--drivers/gpio/gpio-sodaville.c12
-rw-r--r--drivers/gpio/gpiolib-of.c236
-rw-r--r--drivers/gpio/gpiolib.c14
16 files changed, 1009 insertions, 283 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index e03653d6935..25535ebf4f9 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -2,6 +2,14 @@
# GPIO infrastructure and drivers
#
+config ARCH_HAVE_CUSTOM_GPIO_H
+ bool
+ help
+ Selecting this config option from the architecture Kconfig allows
+ the architecture to provide a custom asm/gpio.h implementation
+ overriding the default implementations. New uses of this are
+ strongly discouraged.
+
config ARCH_WANT_OPTIONAL_GPIOLIB
bool
help
@@ -37,6 +45,10 @@ 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 +255,7 @@ 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 +264,11 @@ 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"
@@ -399,6 +412,7 @@ config GPIO_BT8XX
config GPIO_LANGWELL
bool "Intel Langwell/Penwell GPIO support"
depends on PCI && X86
+ select IRQ_DOMAIN
help
Say Y here to support Intel Langwell/Penwell GPIO.
@@ -514,4 +528,12 @@ config GPIO_TPS65910
help
Select this option to enable GPIO driver for the TPS65910
chip family.
+
+config GPIO_MSIC
+ bool "Intel MSIC mixed signal gpio support"
+ depends on MFD_INTEL_MSIC
+ help
+ Enable support for GPIO on intel MSIC controllers found in
+ intel MID devices
+
endif
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 007f54bd008..7862f49b4d0 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
@@ -32,6 +33,7 @@ obj-$(CONFIG_GPIO_MCP23S08) += gpio-mcp23s08.o
obj-$(CONFIG_GPIO_ML_IOH) += gpio-ml-ioh.o
obj-$(CONFIG_GPIO_MPC5200) += gpio-mpc5200.o
obj-$(CONFIG_GPIO_MPC8XXX) += gpio-mpc8xxx.o
+obj-$(CONFIG_GPIO_MSIC) += gpio-msic.o
obj-$(CONFIG_GPIO_MSM_V1) += gpio-msm-v1.o
obj-$(CONFIG_GPIO_MSM_V2) += gpio-msm-v2.o
obj-$(CONFIG_GPIO_MXC) += gpio-mxc.o
diff --git a/drivers/gpio/devres.c b/drivers/gpio/devres.c
index 3dd29399cef..d21a9ff3855 100644
--- a/drivers/gpio/devres.c
+++ b/drivers/gpio/devres.c
@@ -71,6 +71,35 @@ int devm_gpio_request(struct device *dev, unsigned gpio, const char *label)
EXPORT_SYMBOL(devm_gpio_request);
/**
+ * devm_gpio_request_one - request a single GPIO with initial setup
+ * @dev: device to request for
+ * @gpio: the GPIO number
+ * @flags: GPIO configuration as specified by GPIOF_*
+ * @label: a literal description string of this GPIO
+ */
+int devm_gpio_request_one(struct device *dev, unsigned gpio,
+ unsigned long flags, const char *label)
+{
+ unsigned *dr;
+ int rc;
+
+ dr = devres_alloc(devm_gpio_release, sizeof(unsigned), GFP_KERNEL);
+ if (!dr)
+ return -ENOMEM;
+
+ rc = gpio_request_one(gpio, flags, label);
+ if (rc) {
+ devres_free(dr);
+ return rc;
+ }
+
+ *dr = gpio;
+ devres_add(dev, dr);
+
+ return 0;
+}
+
+/**
* devm_gpio_free - free an interrupt
* @dev: device to free gpio for
* @gpio: gpio to free
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..a1c8754f52c 100644
--- a/drivers/gpio/gpio-langwell.c
+++ b/drivers/gpio/gpio-langwell.c
@@ -36,6 +36,7 @@
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>
+#include <linux/irqdomain.h>
/*
* Langwell chip has 64 pins and thus there are 2 32bit registers to control
@@ -66,8 +67,8 @@ struct lnw_gpio {
struct gpio_chip chip;
void *reg_base;
spinlock_t lock;
- unsigned irq_base;
struct pci_dev *pdev;
+ struct irq_domain *domain;
};
static void __iomem *gpio_reg(struct gpio_chip *chip, unsigned offset,
@@ -176,13 +177,13 @@ static int lnw_gpio_direction_output(struct gpio_chip *chip,
static int lnw_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
{
struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip);
- return lnw->irq_base + offset;
+ return irq_create_mapping(lnw->domain, offset);
}
static int lnw_irq_type(struct irq_data *d, unsigned type)
{
struct lnw_gpio *lnw = irq_data_get_irq_chip_data(d);
- u32 gpio = d->irq - lnw->irq_base;
+ u32 gpio = irqd_to_hwirq(d);
unsigned long flags;
u32 value;
void __iomem *grer = gpio_reg(&lnw->chip, gpio, GRER);
@@ -249,20 +250,55 @@ static void lnw_irq_handler(unsigned irq, struct irq_desc *desc)
/* check GPIO controller to check which pin triggered the interrupt */
for (base = 0; base < lnw->chip.ngpio; base += 32) {
gedr = gpio_reg(&lnw->chip, base, GEDR);
- pending = readl(gedr);
- while (pending) {
+ while ((pending = readl(gedr))) {
gpio = __ffs(pending);
mask = BIT(gpio);
- pending &= ~mask;
/* Clear before handling so we can't lose an edge */
writel(mask, gedr);
- generic_handle_irq(lnw->irq_base + base + gpio);
+ generic_handle_irq(irq_find_mapping(lnw->domain,
+ base + gpio));
}
}
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);
+ }
+}
+
+static int lnw_gpio_irq_map(struct irq_domain *d, unsigned int virq,
+ irq_hw_number_t hw)
+{
+ struct lnw_gpio *lnw = d->host_data;
+
+ irq_set_chip_and_handler_name(virq, &lnw_irqchip, handle_simple_irq,
+ "demux");
+ irq_set_chip_data(virq, lnw);
+ irq_set_irq_type(virq, IRQ_TYPE_NONE);
+
+ return 0;
+}
+
+static const struct irq_domain_ops lnw_gpio_irq_ops = {
+ .map = lnw_gpio_irq_map,
+ .xlate = irq_domain_xlate_twocell,
+};
+
#ifdef CONFIG_PM
static int lnw_gpio_runtime_resume(struct device *dev)
{
@@ -300,23 +336,22 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
void *base;
- int i;
resource_size_t start, len;
struct lnw_gpio *lnw;
- 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) {
dev_err(&pdev->dev, "error requesting resources\n");
goto err2;
}
- /* get the irq_base from bar1 */
+ /* get the gpio_base from bar1 */
start = pci_resource_start(pdev, 1);
len = pci_resource_len(pdev, 1);
base = ioremap_nocache(start, len);
@@ -324,28 +359,32 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
dev_err(&pdev->dev, "error mapping bar1\n");
goto err3;
}
- irq_base = *(u32 *)base;
gpio_base = *((u32 *)base + 1);
/* release the IO mapping, since we already get the info from bar1 */
iounmap(base);
/* 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;
}
+
+ lnw->domain = irq_domain_add_linear(pdev->dev.of_node, ngpio,
+ &lnw_gpio_irq_ops, lnw);
+ if (!lnw->domain)
+ goto err3;
+
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;
@@ -354,38 +393,32 @@ 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 err3;
}
+
+ 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++) {
- irq_set_chip_and_handler_name(i + lnw->irq_base, &lnw_irqchip,
- handle_simple_irq, "demux");
- irq_set_chip_data(i + lnw->irq_base, lnw);
- }
spin_lock_init(&lnw->lock);
pm_runtime_put_noidle(&pdev->dev);
pm_runtime_allow(&pdev->dev);
- goto done;
-err5:
- kfree(lnw);
-err4:
- iounmap(base);
+ return 0;
+
err3:
pci_release_regions(pdev);
err2:
pci_disable_device(pdev);
-done:
return retval;
}
diff --git a/drivers/gpio/gpio-lpc32xx.c b/drivers/gpio/gpio-lpc32xx.c
index 61c2d08d37b..c2199beca98 100644
--- a/drivers/gpio/gpio-lpc32xx.c
+++ b/drivers/gpio/gpio-lpc32xx.c
@@ -21,6 +21,9 @@
#include <linux/io.h>
#include <linux/errno.h>
#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
#include <mach/hardware.h>
#include <mach/platform.h>
@@ -454,10 +457,57 @@ static struct lpc32xx_gpio_chip lpc32xx_gpiochip[] = {
},
};
+/* Empty now, can be removed later when mach-lpc32xx is finally switched over
+ * to DT support
+ */
void __init lpc32xx_gpio_init(void)
{
+}
+
+static int lpc32xx_of_xlate(struct gpio_chip *gc,
+ const struct of_phandle_args *gpiospec, u32 *flags)
+{
+ /* Is this the correct bank? */
+ u32 bank = gpiospec->args[0];
+ if ((bank > ARRAY_SIZE(lpc32xx_gpiochip) ||
+ (gc != &lpc32xx_gpiochip[bank].chip)))
+ return -EINVAL;
+
+ if (flags)
+ *flags = gpiospec->args[2];
+ return gpiospec->args[1];
+}
+
+static int __devinit lpc32xx_gpio_probe(struct platform_device *pdev)
+{
int i;
- for (i = 0; i < ARRAY_SIZE(lpc32xx_gpiochip); i++)
+ for (i = 0; i < ARRAY_SIZE(lpc32xx_gpiochip); i++) {
+ if (pdev->dev.of_node) {
+ lpc32xx_gpiochip[i].chip.of_xlate = lpc32xx_of_xlate;
+ lpc32xx_gpiochip[i].chip.of_gpio_n_cells = 3;
+ lpc32xx_gpiochip[i].chip.of_node = pdev->dev.of_node;
+ }
gpiochip_add(&lpc32xx_gpiochip[i].chip);
+ }
+
+ return 0;
}
+
+#ifdef CONFIG_OF
+static struct of_device_id lpc32xx_gpio_of_match[] __devinitdata = {
+ { .compatible = "nxp,lpc3220-gpio", },
+ { },
+};
+#endif
+
+static struct platform_driver lpc32xx_gpio_driver = {
+ .driver = {
+ .name = "lpc32xx-gpio",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(lpc32xx_gpio_of_match),
+ },
+ .probe = lpc32xx_gpio_probe,
+};
+
+module_platform_driver(lpc32xx_gpio_driver);
diff --git a/drivers/gpio/gpio-mcp23s08.c b/drivers/gpio/gpio-mcp23s08.c
index c5d83a8a91c..0f425189de1 100644
--- a/drivers/gpio/gpio-mcp23s08.c
+++ b/drivers/gpio/gpio-mcp23s08.c
@@ -353,7 +353,7 @@ static void mcp23s08_dbg_show(struct seq_file *s, struct gpio_chip *chip)
chip->base + t, bank, t, label,
(mcp->cache[MCP_IODIR] & mask) ? "in " : "out",
(mcp->cache[MCP_GPIO] & mask) ? "hi" : "lo",
- (mcp->cache[MCP_GPPU] & mask) ? " " : "up");
+ (mcp->cache[MCP_GPPU] & mask) ? "up" : " ");
/* NOTE: ignoring the irq-related registers */
seq_printf(s, "\n");
}
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-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
index e6568c19c93..5a1817eedd1 100644
--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -163,7 +163,8 @@ static void mpc8xxx_gpio_irq_cascade(unsigned int irq, struct irq_desc *desc)
if (mask)
generic_handle_irq(irq_linear_revmap(mpc8xxx_gc->irq,
32 - ffs(mask)));
- chip->irq_eoi(&desc->irq_data);
+ if (chip->irq_eoi)
+ chip->irq_eoi(&desc->irq_data);
}
static void mpc8xxx_irq_unmask(struct irq_data *d)
diff --git a/drivers/gpio/gpio-msic.c b/drivers/gpio/gpio-msic.c
new file mode 100644
index 00000000000..71a838f4450
--- /dev/null
+++ b/drivers/gpio/gpio-msic.c
@@ -0,0 +1,339 @@
+/*
+ * Intel Medfield MSIC GPIO driver>
+ * Copyright (c) 2011, Intel Corporation.
+ *
+ * Author: Mathias Nyman <mathias.nyman@linux.intel.com>
+ * Based on intel_pmic_gpio.c
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/intel_msic.h>
+
+/* the offset for the mapping of global gpio pin to irq */
+#define MSIC_GPIO_IRQ_OFFSET 0x100
+
+#define MSIC_GPIO_DIR_IN 0
+#define MSIC_GPIO_DIR_OUT BIT(5)
+#define MSIC_GPIO_TRIG_FALL BIT(1)
+#define MSIC_GPIO_TRIG_RISE BIT(2)
+
+/* masks for msic gpio output GPIOxxxxCTLO registers */
+#define MSIC_GPIO_DIR_MASK BIT(5)
+#define MSIC_GPIO_DRV_MASK BIT(4)
+#define MSIC_GPIO_REN_MASK BIT(3)
+#define MSIC_GPIO_RVAL_MASK (BIT(2) | BIT(1))
+#define MSIC_GPIO_DOUT_MASK BIT(0)
+
+/* masks for msic gpio input GPIOxxxxCTLI registers */
+#define MSIC_GPIO_GLBYP_MASK BIT(5)
+#define MSIC_GPIO_DBNC_MASK (BIT(4) | BIT(3))
+#define MSIC_GPIO_INTCNT_MASK (BIT(2) | BIT(1))
+#define MSIC_GPIO_DIN_MASK BIT(0)
+
+#define MSIC_NUM_GPIO 24
+
+struct msic_gpio {
+ struct platform_device *pdev;
+ struct mutex buslock;
+ struct gpio_chip chip;
+ int irq;
+ unsigned irq_base;
+ unsigned long trig_change_mask;
+ unsigned trig_type;
+};
+
+/*
+ * MSIC has 24 gpios, 16 low voltage (1.2-1.8v) and 8 high voltage (3v).
+ * Both the high and low voltage gpios are divided in two banks.
+ * GPIOs are numbered with GPIO0LV0 as gpio_base in the following order:
+ * GPIO0LV0..GPIO0LV7: low voltage, bank 0, gpio_base
+ * GPIO1LV0..GPIO1LV7: low voltage, bank 1, gpio_base + 8
+ * GPIO0HV0..GPIO0HV3: high voltage, bank 0, gpio_base + 16
+ * GPIO1HV0..GPIO1HV3: high voltage, bank 1, gpio_base + 20
+ */
+
+static int msic_gpio_to_ireg(unsigned offset)
+{
+ if (offset >= MSIC_NUM_GPIO)
+ return -EINVAL;
+
+ if (offset < 8)
+ return INTEL_MSIC_GPIO0LV0CTLI - offset;
+ if (offset < 16)
+ return INTEL_MSIC_GPIO1LV0CTLI - offset + 8;
+ if (offset < 20)
+ return INTEL_MSIC_GPIO0HV0CTLI - offset + 16;
+
+ return INTEL_MSIC_GPIO1HV0CTLI - offset + 20;
+}
+
+static int msic_gpio_to_oreg(unsigned offset)
+{
+ if (offset >= MSIC_NUM_GPIO)
+ return -EINVAL;
+
+ if (offset < 8)
+ return INTEL_MSIC_GPIO0LV0CTLO - offset;
+ if (offset < 16)
+ return INTEL_MSIC_GPIO1LV0CTLO - offset + 8;
+ if (offset < 20)
+ return INTEL_MSIC_GPIO0HV0CTLO - offset + 16;
+
+ return INTEL_MSIC_GPIO1HV0CTLO + offset + 20;
+}
+
+static int msic_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+ int reg;
+
+ reg = msic_gpio_to_oreg(offset);
+ if (reg < 0)
+ return reg;
+
+ return intel_msic_reg_update(reg, MSIC_GPIO_DIR_IN, MSIC_GPIO_DIR_MASK);
+}
+
+static int msic_gpio_direction_output(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ int reg;
+ unsigned mask;
+
+ value = (!!value) | MSIC_GPIO_DIR_OUT;
+ mask = MSIC_GPIO_DIR_MASK | MSIC_GPIO_DOUT_MASK;
+
+ reg = msic_gpio_to_oreg(offset);
+ if (reg < 0)
+ return reg;
+
+ return intel_msic_reg_update(reg, value, mask);
+}
+
+static int msic_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ u8 r;
+ int ret;
+ int reg;
+
+ reg = msic_gpio_to_ireg(offset);
+ if (reg < 0)
+ return reg;
+
+ ret = intel_msic_reg_read(reg, &r);
+ if (ret < 0)
+ return ret;
+
+ return r & MSIC_GPIO_DIN_MASK;
+}
+
+static void msic_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+ int reg;
+
+ reg = msic_gpio_to_oreg(offset);
+ if (reg < 0)
+ return;
+
+ intel_msic_reg_update(reg, !!value , MSIC_GPIO_DOUT_MASK);
+}
+
+/*
+ * This is called from genirq with mg->buslock locked and
+ * irq_desc->lock held. We can not access the scu bus here, so we
+ * store the change and update in the bus_sync_unlock() function below
+ */
+static int msic_irq_type(struct irq_data *data, unsigned type)
+{
+ struct msic_gpio *mg = irq_data_get_irq_chip_data(data);
+ u32 gpio = data->irq - mg->irq_base;
+
+ if (gpio >= mg->chip.ngpio)
+ return -EINVAL;
+
+ /* mark for which gpio the trigger changed, protected by buslock */
+ mg->trig_change_mask |= (1 << gpio);
+ mg->trig_type = type;
+
+ return 0;
+}
+
+static int msic_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+ struct msic_gpio *mg = container_of(chip, struct msic_gpio, chip);
+ return mg->irq_base + offset;
+}
+
+static void msic_bus_lock(struct irq_data *data)
+{
+ struct msic_gpio *mg = irq_data_get_irq_chip_data(data);
+ mutex_lock(&mg->buslock);
+}
+
+static void msic_bus_sync_unlock(struct irq_data *data)
+{
+ struct msic_gpio *mg = irq_data_get_irq_chip_data(data);
+ int offset;
+ int reg;
+ u8 trig = 0;
+
+ /* We can only get one change at a time as the buslock covers the
+ entire transaction. The irq_desc->lock is dropped before we are
+ called but that is fine */
+ if (mg->trig_change_mask) {
+ offset = __ffs(mg->trig_change_mask);
+
+ reg = msic_gpio_to_ireg(offset);
+ if (reg < 0)
+ goto out;
+
+ if (mg->trig_type & IRQ_TYPE_EDGE_RISING)
+ trig |= MSIC_GPIO_TRIG_RISE;
+ if (mg->trig_type & IRQ_TYPE_EDGE_FALLING)
+ trig |= MSIC_GPIO_TRIG_FALL;
+
+ intel_msic_reg_update(reg, trig, MSIC_GPIO_INTCNT_MASK);
+ mg->trig_change_mask = 0;
+ }
+out:
+ mutex_unlock(&mg->buslock);
+}
+
+/* Firmware does all the masking and unmasking for us, no masking here. */
+static void msic_irq_unmask(struct irq_data *data) { }
+
+static void msic_irq_mask(struct irq_data *data) { }
+
+static struct irq_chip msic_irqchip = {
+ .name = "MSIC-GPIO",
+ .irq_mask = msic_irq_mask,
+ .irq_unmask = msic_irq_unmask,
+ .irq_set_type = msic_irq_type,
+ .irq_bus_lock = msic_bus_lock,
+ .irq_bus_sync_unlock = msic_bus_sync_unlock,
+};
+
+static void msic_gpio_irq_handler(unsigned irq, struct irq_desc *desc)
+{
+ struct irq_data *data = irq_desc_get_irq_data(desc);
+ struct msic_gpio *mg = irq_data_get_irq_handler_data(data);
+ struct irq_chip *chip = irq_data_get_irq_chip(data);
+ struct intel_msic *msic = pdev_to_intel_msic(mg->pdev);
+ int i;
+ int bitnr;
+ u8 pin;
+ unsigned long pending = 0;
+
+ for (i = 0; i < (mg->chip.ngpio / BITS_PER_BYTE); i++) {
+ intel_msic_irq_read(msic, INTEL_MSIC_GPIO0LVIRQ + i, &pin);
+ pending = pin;
+
+ if (pending) {
+ for_each_set_bit(bitnr, &pending, BITS_PER_BYTE)
+ generic_handle_irq(mg->irq_base +
+ (i * BITS_PER_BYTE) + bitnr);
+ }
+ }
+ chip->irq_eoi(data);
+}
+
+static int __devinit platform_msic_gpio_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct intel_msic_gpio_pdata *pdata = dev->platform_data;
+ struct msic_gpio *mg;
+ int irq = platform_get_irq(pdev, 0);
+ int retval;
+ int i;
+
+ if (irq < 0) {
+ dev_err(dev, "no IRQ line\n");
+ return -EINVAL;
+ }
+
+ if (!pdata || !pdata->gpio_base) {
+ dev_err(dev, "incorrect or missing platform data\n");
+ return -EINVAL;
+ }
+
+ mg = kzalloc(sizeof(*mg), GFP_KERNEL);
+ if (!mg)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, mg);
+
+ mg->pdev = pdev;
+ mg->irq = irq;
+ mg->irq_base = pdata->gpio_base + MSIC_GPIO_IRQ_OFFSET;
+ mg->chip.label = "msic_gpio";
+ mg->chip.direction_input = msic_gpio_direction_input;
+ mg->chip.direction_output = msic_gpio_direction_output;
+ mg->chip.get = msic_gpio_get;
+ mg->chip.set = msic_gpio_set;
+ mg->chip.to_irq = msic_gpio_to_irq;
+ mg->chip.base = pdata->gpio_base;
+ mg->chip.ngpio = MSIC_NUM_GPIO;
+ mg->chip.can_sleep = 1;
+ mg->chip.dev = dev;
+
+ mutex_init(&mg->buslock);
+
+ retval = gpiochip_add(&mg->chip);
+ if (retval) {
+ dev_err(dev, "Adding MSIC gpio chip failed\n");
+ goto err;
+ }
+
+ for (i = 0; i < mg->chip.ngpio; i++) {
+ irq_set_chip_data(i + mg->irq_base, mg);
+ irq_set_chip_and_handler_name(i + mg->irq_base,
+ &msic_irqchip,
+ handle_simple_irq,
+ "demux");
+ }
+ irq_set_chained_handler(mg->irq, msic_gpio_irq_handler);
+ irq_set_handler_data(mg->irq, mg);
+
+ return 0;
+err:
+ kfree(mg);
+ return retval;
+}
+
+static struct platform_driver platform_msic_gpio_driver = {
+ .driver = {
+ .name = "msic_gpio",
+ .owner = THIS_MODULE,
+ },
+ .probe = platform_msic_gpio_probe,
+};
+
+static int __init platform_msic_gpio_init(void)
+{
+ return platform_driver_register(&platform_msic_gpio_driver);
+}
+
+subsys_initcall(platform_msic_gpio_init);
+
+MODULE_AUTHOR("Mathias Nyman <mathias.nyman@linux.intel.com>");
+MODULE_DESCRIPTION("Intel Medfield MSIC GPIO driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index d3f3e8f5456..1c313c710be 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -28,6 +28,8 @@
#define PCA953X_INVERT 2
#define PCA953X_DIRECTION 3
+#define REG_ADDR_AI 0x80
+
#define PCA957X_IN 0
#define PCA957X_INVRT 1
#define PCA957X_BKEN 2
@@ -63,15 +65,15 @@ static const struct i2c_device_id pca953x_id[] = {
{ "pca6107", 8 | PCA953X_TYPE | PCA_INT, },
{ "tca6408", 8 | PCA953X_TYPE | PCA_INT, },
{ "tca6416", 16 | PCA953X_TYPE | PCA_INT, },
- /* NYET: { "tca6424", 24, }, */
+ { "tca6424", 24 | PCA953X_TYPE | PCA_INT, },
{ }
};
MODULE_DEVICE_TABLE(i2c, pca953x_id);
struct pca953x_chip {
unsigned gpio_start;
- uint16_t reg_output;
- uint16_t reg_direction;
+ u32 reg_output;
+ u32 reg_direction;
struct mutex i2c_lock;
#ifdef CONFIG_GPIO_PCA953X_IRQ
@@ -89,12 +91,20 @@ struct pca953x_chip {
int chip_type;
};
-static int pca953x_write_reg(struct pca953x_chip *chip, int reg, uint16_t val)
+static int pca953x_write_reg(struct pca953x_chip *chip, int reg, u32 val)
{
int ret = 0;
if (chip->gpio_chip.ngpio <= 8)
ret = i2c_smbus_write_byte_data(chip->client, reg, val);
+ else if (chip->gpio_chip.ngpio == 24) {
+ ret = i2c_smbus_write_word_data(chip->client,
+ (reg << 2) | REG_ADDR_AI,
+ val & 0xffff);
+ ret = i2c_smbus_write_byte_data(chip->client,
+ (reg << 2) + 2,
+ (val & 0xff0000) >> 16);
+ }
else {
switch (chip->chip_type) {
case PCA953X_TYPE:
@@ -121,12 +131,17 @@ static int pca953x_write_reg(struct pca953x_chip *chip, int reg, uint16_t val)
return 0;
}
-static int pca953x_read_reg(struct pca953x_chip *chip, int reg, uint16_t *val)
+static int pca953x_read_reg(struct pca953x_chip *chip, int reg, u32 *val)
{
int ret;
if (chip->gpio_chip.ngpio <= 8)
ret = i2c_smbus_read_byte_data(chip->client, reg);
+ else if (chip->gpio_chip.ngpio == 24) {
+ ret = i2c_smbus_read_word_data(chip->client, reg << 2);
+ ret |= (i2c_smbus_read_byte_data(chip->client,
+ (reg << 2) + 2)<<16);
+ }
else
ret = i2c_smbus_read_word_data(chip->client, reg << 1);
@@ -135,14 +150,14 @@ static int pca953x_read_reg(struct pca953x_chip *chip, int reg, uint16_t *val)
return ret;
}
- *val = (uint16_t)ret;
+ *val = (u32)ret;
return 0;
}
static int pca953x_gpio_direction_input(struct gpio_chip *gc, unsigned off)
{
struct pca953x_chip *chip;
- uint16_t reg_val;
+ uint reg_val;
int ret, offset = 0;
chip = container_of(gc, struct pca953x_chip, gpio_chip);
@@ -173,7 +188,7 @@ static int pca953x_gpio_direction_output(struct gpio_chip *gc,
unsigned off, int val)
{
struct pca953x_chip *chip;
- uint16_t reg_val;
+ uint reg_val;
int ret, offset = 0;
chip = container_of(gc, struct pca953x_chip, gpio_chip);
@@ -223,7 +238,7 @@ exit:
static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off)
{
struct pca953x_chip *chip;
- uint16_t reg_val;
+ u32 reg_val;
int ret, offset = 0;
chip = container_of(gc, struct pca953x_chip, gpio_chip);
@@ -253,7 +268,7 @@ static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off)
static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val)
{
struct pca953x_chip *chip;
- uint16_t reg_val;
+ u32 reg_val;
int ret, offset = 0;
chip = container_of(gc, struct pca953x_chip, gpio_chip);
@@ -386,7 +401,7 @@ static struct irq_chip pca953x_irq_chip = {
static uint16_t pca953x_irq_pending(struct pca953x_chip *chip)
{
- uint16_t cur_stat;
+ u32 cur_stat;
uint16_t old_stat;
uint16_t pending;
uint16_t trigger;
@@ -449,6 +464,7 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
{
struct i2c_client *client = chip->client;
int ret, offset = 0;
+ u32 temporary;
if (irq_base != -1
&& (id->driver_data & PCA_INT)) {
@@ -462,7 +478,8 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
offset = PCA957X_IN;
break;
}
- ret = pca953x_read_reg(chip, offset, &chip->irq_stat);
+ ret = pca953x_read_reg(chip, offset, &temporary);
+ chip->irq_stat = temporary;
if (ret)
goto out_failed;
@@ -603,7 +620,7 @@ out:
static int __devinit device_pca957x_init(struct pca953x_chip *chip, int invert)
{
int ret;
- uint16_t val = 0;
+ u32 val = 0;
/* Let every port in proper state, that could save power */
pca953x_write_reg(chip, PCA957X_PUPD, 0x0);
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-samsung.c b/drivers/gpio/gpio-samsung.c
index 19d6fc0229c..5d49aff3bb9 100644
--- a/drivers/gpio/gpio-samsung.c
+++ b/drivers/gpio/gpio-samsung.c
@@ -2714,12 +2714,224 @@ static __init void exynos_gpiolib_attach_ofnode(struct samsung_gpio_chip *chip,
}
#endif /* defined(CONFIG_ARCH_EXYNOS) && defined(CONFIG_OF) */
+static __init void exynos4_gpiolib_init(void)
+{
+#ifdef CONFIG_CPU_EXYNOS4210
+ struct samsung_gpio_chip *chip;
+ int i, nr_chips;
+ void __iomem *gpio_base1, *gpio_base2, *gpio_base3;
+ int group = 0;
+ void __iomem *gpx_base;
+
+ /* gpio part1 */
+ gpio_base1 = ioremap(EXYNOS4_PA_GPIO1, SZ_4K);
+ if (gpio_base1 == NULL) {
+ pr_err("unable to ioremap for gpio_base1\n");
+ goto err_ioremap1;
+ }
+
+ chip = exynos4_gpios_1;
+ nr_chips = ARRAY_SIZE(exynos4_gpios_1);
+
+ for (i = 0; i < nr_chips; i++, chip++) {
+ if (!chip->config) {
+ chip->config = &exynos_gpio_cfg;
+ chip->group = group++;
+ }
+ exynos_gpiolib_attach_ofnode(chip,
+ EXYNOS4_PA_GPIO1, i * 0x20);
+ }
+ samsung_gpiolib_add_4bit_chips(exynos4_gpios_1,
+ nr_chips, gpio_base1);
+
+ /* gpio part2 */
+ gpio_base2 = ioremap(EXYNOS4_PA_GPIO2, SZ_4K);
+ if (gpio_base2 == NULL) {
+ pr_err("unable to ioremap for gpio_base2\n");
+ goto err_ioremap2;
+ }
+
+ /* need to set base address for gpx */
+ chip = &exynos4_gpios_2[16];
+ gpx_base = gpio_base2 + 0xC00;
+ for (i = 0; i < 4; i++, chip++, gpx_base += 0x20)
+ chip->base = gpx_base;
+
+ chip = exynos4_gpios_2;
+ nr_chips = ARRAY_SIZE(exynos4_gpios_2);
+
+ for (i = 0; i < nr_chips; i++, chip++) {
+ if (!chip->config) {
+ chip->config = &exynos_gpio_cfg;
+ chip->group = group++;
+ }
+ exynos_gpiolib_attach_ofnode(chip,
+ EXYNOS4_PA_GPIO2, i * 0x20);
+ }
+ samsung_gpiolib_add_4bit_chips(exynos4_gpios_2,
+ nr_chips, gpio_base2);
+
+ /* gpio part3 */
+ gpio_base3 = ioremap(EXYNOS4_PA_GPIO3, SZ_256);
+ if (gpio_base3 == NULL) {
+ pr_err("unable to ioremap for gpio_base3\n");
+ goto err_ioremap3;
+ }
+
+ chip = exynos4_gpios_3;
+ nr_chips = ARRAY_SIZE(exynos4_gpios_3);
+
+ for (i = 0; i < nr_chips; i++, chip++) {
+ if (!chip->config) {
+ chip->config = &exynos_gpio_cfg;
+ chip->group = group++;
+ }
+ exynos_gpiolib_attach_ofnode(chip,
+ EXYNOS4_PA_GPIO3, i * 0x20);
+ }
+ samsung_gpiolib_add_4bit_chips(exynos4_gpios_3,
+ nr_chips, gpio_base3);
+
+#if defined(CONFIG_CPU_EXYNOS4210) && defined(CONFIG_S5P_GPIO_INT)
+ s5p_register_gpioint_bank(IRQ_GPIO_XA, 0, IRQ_GPIO1_NR_GROUPS);
+ s5p_register_gpioint_bank(IRQ_GPIO_XB, IRQ_GPIO1_NR_GROUPS, IRQ_GPIO2_NR_GROUPS);
+#endif
+
+ return;
+
+err_ioremap3:
+ iounmap(gpio_base2);
+err_ioremap2:
+ iounmap(gpio_base1);
+err_ioremap1:
+ return;
+#endif /* CONFIG_CPU_EXYNOS4210 */
+}
+
+static __init void exynos5_gpiolib_init(void)
+{
+#ifdef CONFIG_SOC_EXYNOS5250
+ struct samsung_gpio_chip *chip;
+ int i, nr_chips;
+ void __iomem *gpio_base1, *gpio_base2, *gpio_base3, *gpio_base4;
+ int group = 0;
+ void __iomem *gpx_base;
+
+ /* gpio part1 */
+ gpio_base1 = ioremap(EXYNOS5_PA_GPIO1, SZ_4K);
+ if (gpio_base1 == NULL) {
+ pr_err("unable to ioremap for gpio_base1\n");
+ goto err_ioremap1;
+ }
+
+ /* need to set base address for gpx */
+ chip = &exynos5_gpios_1[20];
+ gpx_base = gpio_base1 + 0xC00;
+ for (i = 0; i < 4; i++, chip++, gpx_base += 0x20)
+ chip->base = gpx_base;
+
+ chip = exynos5_gpios_1;
+ nr_chips = ARRAY_SIZE(exynos5_gpios_1);
+
+ for (i = 0; i < nr_chips; i++, chip++) {
+ if (!chip->config) {
+ chip->config = &exynos_gpio_cfg;
+ chip->group = group++;
+ }
+ exynos_gpiolib_attach_ofnode(chip,
+ EXYNOS5_PA_GPIO1, i * 0x20);
+ }
+ samsung_gpiolib_add_4bit_chips(exynos5_gpios_1,
+ nr_chips, gpio_base1);
+
+ /* gpio part2 */
+ gpio_base2 = ioremap(EXYNOS5_PA_GPIO2, SZ_4K);
+ if (gpio_base2 == NULL) {
+ pr_err("unable to ioremap for gpio_base2\n");
+ goto err_ioremap2;
+ }
+
+ chip = exynos5_gpios_2;
+ nr_chips = ARRAY_SIZE(exynos5_gpios_2);
+
+ for (i = 0; i < nr_chips; i++, chip++) {
+ if (!chip->config) {
+ chip->config = &exynos_gpio_cfg;
+ chip->group = group++;
+ }
+ exynos_gpiolib_attach_ofnode(chip,
+ EXYNOS5_PA_GPIO2, i * 0x20);
+ }
+ samsung_gpiolib_add_4bit_chips(exynos5_gpios_2,
+ nr_chips, gpio_base2);
+
+ /* gpio part3 */
+ gpio_base3 = ioremap(EXYNOS5_PA_GPIO3, SZ_4K);
+ if (gpio_base3 == NULL) {
+ pr_err("unable to ioremap for gpio_base3\n");
+ goto err_ioremap3;
+ }
+
+ /* need to set base address for gpv */
+ exynos5_gpios_3[0].base = gpio_base3;
+ exynos5_gpios_3[1].base = gpio_base3 + 0x20;
+ exynos5_gpios_3[2].base = gpio_base3 + 0x60;
+ exynos5_gpios_3[3].base = gpio_base3 + 0x80;
+ exynos5_gpios_3[4].base = gpio_base3 + 0xC0;
+
+ chip = exynos5_gpios_3;
+ nr_chips = ARRAY_SIZE(exynos5_gpios_3);
+
+ for (i = 0; i < nr_chips; i++, chip++) {
+ if (!chip->config) {
+ chip->config = &exynos_gpio_cfg;
+ chip->group = group++;
+ }
+ exynos_gpiolib_attach_ofnode(chip,
+ EXYNOS5_PA_GPIO3, i * 0x20);
+ }
+ samsung_gpiolib_add_4bit_chips(exynos5_gpios_3,
+ nr_chips, gpio_base3);
+
+ /* gpio part4 */
+ gpio_base4 = ioremap(EXYNOS5_PA_GPIO4, SZ_4K);
+ if (gpio_base4 == NULL) {
+ pr_err("unable to ioremap for gpio_base4\n");
+ goto err_ioremap4;
+ }
+
+ chip = exynos5_gpios_4;
+ nr_chips = ARRAY_SIZE(exynos5_gpios_4);
+
+ for (i = 0; i < nr_chips; i++, chip++) {
+ if (!chip->config) {
+ chip->config = &exynos_gpio_cfg;
+ chip->group = group++;
+ }
+ exynos_gpiolib_attach_ofnode(chip,
+ EXYNOS5_PA_GPIO4, i * 0x20);
+ }
+ samsung_gpiolib_add_4bit_chips(exynos5_gpios_4,
+ nr_chips, gpio_base4);
+ return;
+
+err_ioremap4:
+ iounmap(gpio_base3);
+err_ioremap3:
+ iounmap(gpio_base2);
+err_ioremap2:
+ iounmap(gpio_base1);
+err_ioremap1:
+ return;
+
+#endif /* CONFIG_SOC_EXYNOS5250 */
+}
+
/* TODO: cleanup soc_is_* */
static __init int samsung_gpiolib_init(void)
{
struct samsung_gpio_chip *chip;
int i, nr_chips;
- void __iomem *gpio_base1, *gpio_base2, *gpio_base3, *gpio_base4;
int group = 0;
samsung_gpiolib_set_cfg(samsung_gpio_cfgs, ARRAY_SIZE(samsung_gpio_cfgs));
@@ -2785,200 +2997,15 @@ static __init int samsung_gpiolib_init(void)
s5p_register_gpioint_bank(IRQ_GPIOINT, 0, S5P_GPIOINT_GROUP_MAXNR);
#endif
} else if (soc_is_exynos4210()) {
-#ifdef CONFIG_CPU_EXYNOS4210
- void __iomem *gpx_base;
-
- /* gpio part1 */
- gpio_base1 = ioremap(EXYNOS4_PA_GPIO1, SZ_4K);
- if (gpio_base1 == NULL) {
- pr_err("unable to ioremap for gpio_base1\n");
- goto err_ioremap1;
- }
-
- chip = exynos4_gpios_1;
- nr_chips = ARRAY_SIZE(exynos4_gpios_1);
-
- for (i = 0; i < nr_chips; i++, chip++) {
- if (!chip->config) {
- chip->config = &exynos_gpio_cfg;
- chip->group = group++;
- }
- exynos_gpiolib_attach_ofnode(chip,
- EXYNOS4_PA_GPIO1, i * 0x20);
- }
- samsung_gpiolib_add_4bit_chips(exynos4_gpios_1,
- nr_chips, gpio_base1);
-
- /* gpio part2 */
- gpio_base2 = ioremap(EXYNOS4_PA_GPIO2, SZ_4K);
- if (gpio_base2 == NULL) {
- pr_err("unable to ioremap for gpio_base2\n");
- goto err_ioremap2;
- }
-
- /* need to set base address for gpx */
- chip = &exynos4_gpios_2[16];
- gpx_base = gpio_base2 + 0xC00;
- for (i = 0; i < 4; i++, chip++, gpx_base += 0x20)
- chip->base = gpx_base;
-
- chip = exynos4_gpios_2;
- nr_chips = ARRAY_SIZE(exynos4_gpios_2);
-
- for (i = 0; i < nr_chips; i++, chip++) {
- if (!chip->config) {
- chip->config = &exynos_gpio_cfg;
- chip->group = group++;
- }
- exynos_gpiolib_attach_ofnode(chip,
- EXYNOS4_PA_GPIO2, i * 0x20);
- }
- samsung_gpiolib_add_4bit_chips(exynos4_gpios_2,
- nr_chips, gpio_base2);
-
- /* gpio part3 */
- gpio_base3 = ioremap(EXYNOS4_PA_GPIO3, SZ_256);
- if (gpio_base3 == NULL) {
- pr_err("unable to ioremap for gpio_base3\n");
- goto err_ioremap3;
- }
-
- chip = exynos4_gpios_3;
- nr_chips = ARRAY_SIZE(exynos4_gpios_3);
-
- for (i = 0; i < nr_chips; i++, chip++) {
- if (!chip->config) {
- chip->config = &exynos_gpio_cfg;
- chip->group = group++;
- }
- exynos_gpiolib_attach_ofnode(chip,
- EXYNOS4_PA_GPIO3, i * 0x20);
- }
- samsung_gpiolib_add_4bit_chips(exynos4_gpios_3,
- nr_chips, gpio_base3);
-
-#if defined(CONFIG_CPU_EXYNOS4210) && defined(CONFIG_S5P_GPIO_INT)
- s5p_register_gpioint_bank(IRQ_GPIO_XA, 0, IRQ_GPIO1_NR_GROUPS);
- s5p_register_gpioint_bank(IRQ_GPIO_XB, IRQ_GPIO1_NR_GROUPS, IRQ_GPIO2_NR_GROUPS);
-#endif
-
-#endif /* CONFIG_CPU_EXYNOS4210 */
+ exynos4_gpiolib_init();
} else if (soc_is_exynos5250()) {
-#ifdef CONFIG_SOC_EXYNOS5250
- void __iomem *gpx_base;
-
- /* gpio part1 */
- gpio_base1 = ioremap(EXYNOS5_PA_GPIO1, SZ_4K);
- if (gpio_base1 == NULL) {
- pr_err("unable to ioremap for gpio_base1\n");
- goto err_ioremap1;
- }
-
- /* need to set base address for gpx */
- chip = &exynos5_gpios_1[20];
- gpx_base = gpio_base1 + 0xC00;
- for (i = 0; i < 4; i++, chip++, gpx_base += 0x20)
- chip->base = gpx_base;
-
- chip = exynos5_gpios_1;
- nr_chips = ARRAY_SIZE(exynos5_gpios_1);
-
- for (i = 0; i < nr_chips; i++, chip++) {
- if (!chip->config) {
- chip->config = &exynos_gpio_cfg;
- chip->group = group++;
- }
- exynos_gpiolib_attach_ofnode(chip,
- EXYNOS5_PA_GPIO1, i * 0x20);
- }
- samsung_gpiolib_add_4bit_chips(exynos5_gpios_1,
- nr_chips, gpio_base1);
-
- /* gpio part2 */
- gpio_base2 = ioremap(EXYNOS5_PA_GPIO2, SZ_4K);
- if (gpio_base2 == NULL) {
- pr_err("unable to ioremap for gpio_base2\n");
- goto err_ioremap2;
- }
-
- chip = exynos5_gpios_2;
- nr_chips = ARRAY_SIZE(exynos5_gpios_2);
-
- for (i = 0; i < nr_chips; i++, chip++) {
- if (!chip->config) {
- chip->config = &exynos_gpio_cfg;
- chip->group = group++;
- }
- exynos_gpiolib_attach_ofnode(chip,
- EXYNOS5_PA_GPIO2, i * 0x20);
- }
- samsung_gpiolib_add_4bit_chips(exynos5_gpios_2,
- nr_chips, gpio_base2);
-
- /* gpio part3 */
- gpio_base3 = ioremap(EXYNOS5_PA_GPIO3, SZ_4K);
- if (gpio_base3 == NULL) {
- pr_err("unable to ioremap for gpio_base3\n");
- goto err_ioremap3;
- }
-
- /* need to set base address for gpv */
- exynos5_gpios_3[0].base = gpio_base3;
- exynos5_gpios_3[1].base = gpio_base3 + 0x20;
- exynos5_gpios_3[2].base = gpio_base3 + 0x60;
- exynos5_gpios_3[3].base = gpio_base3 + 0x80;
- exynos5_gpios_3[4].base = gpio_base3 + 0xC0;
-
- chip = exynos5_gpios_3;
- nr_chips = ARRAY_SIZE(exynos5_gpios_3);
-
- for (i = 0; i < nr_chips; i++, chip++) {
- if (!chip->config) {
- chip->config = &exynos_gpio_cfg;
- chip->group = group++;
- }
- exynos_gpiolib_attach_ofnode(chip,
- EXYNOS5_PA_GPIO3, i * 0x20);
- }
- samsung_gpiolib_add_4bit_chips(exynos5_gpios_3,
- nr_chips, gpio_base3);
-
- /* gpio part4 */
- gpio_base4 = ioremap(EXYNOS5_PA_GPIO4, SZ_4K);
- if (gpio_base4 == NULL) {
- pr_err("unable to ioremap for gpio_base4\n");
- goto err_ioremap4;
- }
-
- chip = exynos5_gpios_4;
- nr_chips = ARRAY_SIZE(exynos5_gpios_4);
-
- for (i = 0; i < nr_chips; i++, chip++) {
- if (!chip->config) {
- chip->config = &exynos_gpio_cfg;
- chip->group = group++;
- }
- exynos_gpiolib_attach_ofnode(chip,
- EXYNOS5_PA_GPIO4, i * 0x20);
- }
- samsung_gpiolib_add_4bit_chips(exynos5_gpios_4,
- nr_chips, gpio_base4);
-#endif /* CONFIG_SOC_EXYNOS5250 */
+ exynos5_gpiolib_init();
} else {
WARN(1, "Unknown SoC in gpio-samsung, no GPIOs added\n");
return -ENODEV;
}
return 0;
-
-err_ioremap4:
- iounmap(gpio_base3);
-err_ioremap3:
- iounmap(gpio_base2);
-err_ioremap2:
- iounmap(gpio_base1);
-err_ioremap1:
- return -ENOMEM;
}
core_initcall(samsung_gpiolib_init);
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/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
new file mode 100644
index 00000000000..d18068a9f3e
--- /dev/null
+++ b/drivers/gpio/gpiolib-of.c
@@ -0,0 +1,236 @@
+/*
+ * OF helpers for the GPIO API
+ *
+ * Copyright (c) 2007-2008 MontaVista Software, Inc.
+ *
+ * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_gpio.h>
+#include <linux/slab.h>
+
+/* Private data structure for of_gpiochip_is_match */
+struct gg_data {
+ enum of_gpio_flags *flags;
+ struct of_phandle_args gpiospec;
+
+ int out_gpio;
+};
+
+/* Private function for resolving node pointer to gpio_chip */
+static int of_gpiochip_find_and_xlate(struct gpio_chip *gc, void *data)
+{
+ struct gg_data *gg_data = data;
+ int ret;
+
+ if ((gc->of_node != gg_data->gpiospec.np) ||
+ (gc->of_gpio_n_cells != gg_data->gpiospec.args_count) ||
+ (!gc->of_xlate))
+ return false;
+
+ ret = gc->of_xlate(gc, &gg_data->gpiospec, gg_data->flags);
+ if (ret < 0)
+ return false;
+
+ gg_data->out_gpio = ret + gc->base;
+ return true;
+}
+
+/**
+ * of_get_named_gpio_flags() - Get a GPIO number and flags to use with GPIO API
+ * @np: device node to get GPIO from
+ * @propname: property name containing gpio specifier(s)
+ * @index: index of the GPIO
+ * @flags: a flags pointer to fill in
+ *
+ * Returns GPIO number to use with Linux generic GPIO API, or one of the errno
+ * value on the error condition. If @flags is not NULL the function also fills
+ * in flags for the GPIO.
+ */
+int of_get_named_gpio_flags(struct device_node *np, const char *propname,
+ int index, enum of_gpio_flags *flags)
+{
+ struct gg_data gg_data = { .flags = flags, .out_gpio = -ENODEV };
+ int ret;
+
+ /* .of_xlate might decide to not fill in the flags, so clear it. */
+ if (flags)
+ *flags = 0;
+
+ ret = of_parse_phandle_with_args(np, propname, "#gpio-cells", index,
+ &gg_data.gpiospec);
+ if (ret) {
+ pr_debug("%s: can't parse gpios property\n", __func__);
+ return -EINVAL;
+ }
+
+ gpiochip_find(&gg_data, of_gpiochip_find_and_xlate);
+
+ of_node_put(gg_data.gpiospec.np);
+ pr_debug("%s exited with status %d\n", __func__, ret);
+ return gg_data.out_gpio;
+}
+EXPORT_SYMBOL(of_get_named_gpio_flags);
+
+/**
+ * of_gpio_named_count - Count GPIOs for a device
+ * @np: device node to count GPIOs for
+ * @propname: property name containing gpio specifier(s)
+ *
+ * The function returns the count of GPIOs specified for a node.
+ *
+ * Note that the empty GPIO specifiers counts too. For example,
+ *
+ * gpios = <0
+ * &pio1 1 2
+ * 0
+ * &pio2 3 4>;
+ *
+ * defines four GPIOs (so this function will return 4), two of which
+ * are not specified.
+ */
+unsigned int of_gpio_named_count(struct device_node *np, const char* propname)
+{
+ unsigned int cnt = 0;
+
+ do {
+ int ret;
+
+ ret = of_parse_phandle_with_args(np, propname, "#gpio-cells",
+ cnt, NULL);
+ /* A hole in the gpios = <> counts anyway. */
+ if (ret < 0 && ret != -EEXIST)
+ break;
+ } while (++cnt);
+
+ return cnt;
+}
+EXPORT_SYMBOL(of_gpio_named_count);
+
+/**
+ * of_gpio_simple_xlate - translate gpio_spec to the GPIO number and flags
+ * @gc: pointer to the gpio_chip structure
+ * @np: device node of the GPIO chip
+ * @gpio_spec: gpio specifier as found in the device tree
+ * @flags: a flags pointer to fill in
+ *
+ * This is simple translation function, suitable for the most 1:1 mapped
+ * gpio chips. This function performs only one sanity check: whether gpio
+ * is less than ngpios (that is specified in the gpio_chip).
+ */
+int of_gpio_simple_xlate(struct gpio_chip *gc,
+ const struct of_phandle_args *gpiospec, u32 *flags)
+{
+ /*
+ * We're discouraging gpio_cells < 2, since that way you'll have to
+ * write your own xlate function (that will have to retrive the GPIO
+ * number and the flags from a single gpio cell -- this is possible,
+ * but not recommended).
+ */
+ if (gc->of_gpio_n_cells < 2) {
+ WARN_ON(1);
+ return -EINVAL;
+ }
+
+ if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
+ return -EINVAL;
+
+ if (gpiospec->args[0] >= gc->ngpio)
+ return -EINVAL;
+
+ if (flags)
+ *flags = gpiospec->args[1];
+
+ return gpiospec->args[0];
+}
+EXPORT_SYMBOL(of_gpio_simple_xlate);
+
+/**
+ * of_mm_gpiochip_add - Add memory mapped GPIO chip (bank)
+ * @np: device node of the GPIO chip
+ * @mm_gc: pointer to the of_mm_gpio_chip allocated structure
+ *
+ * To use this function you should allocate and fill mm_gc with:
+ *
+ * 1) In the gpio_chip structure:
+ * - all the callbacks
+ * - of_gpio_n_cells
+ * - of_xlate callback (optional)
+ *
+ * 3) In the of_mm_gpio_chip structure:
+ * - save_regs callback (optional)
+ *
+ * If succeeded, this function will map bank's memory and will
+ * do all necessary work for you. Then you'll able to use .regs
+ * to manage GPIOs from the callbacks.
+ */
+int of_mm_gpiochip_add(struct device_node *np,
+ struct of_mm_gpio_chip *mm_gc)
+{
+ int ret = -ENOMEM;
+ struct gpio_chip *gc = &mm_gc->gc;
+
+ gc->label = kstrdup(np->full_name, GFP_KERNEL);
+ if (!gc->label)
+ goto err0;
+
+ mm_gc->regs = of_iomap(np, 0);
+ if (!mm_gc->regs)
+ goto err1;
+
+ gc->base = -1;
+
+ if (mm_gc->save_regs)
+ mm_gc->save_regs(mm_gc);
+
+ mm_gc->gc.of_node = np;
+
+ ret = gpiochip_add(gc);
+ if (ret)
+ goto err2;
+
+ return 0;
+err2:
+ iounmap(mm_gc->regs);
+err1:
+ kfree(gc->label);
+err0:
+ pr_err("%s: GPIO chip registration failed with status %d\n",
+ np->full_name, ret);
+ return ret;
+}
+EXPORT_SYMBOL(of_mm_gpiochip_add);
+
+void of_gpiochip_add(struct gpio_chip *chip)
+{
+ if ((!chip->of_node) && (chip->dev))
+ chip->of_node = chip->dev->of_node;
+
+ if (!chip->of_node)
+ return;
+
+ if (!chip->of_xlate) {
+ chip->of_gpio_n_cells = 2;
+ chip->of_xlate = of_gpio_simple_xlate;
+ }
+
+ of_node_get(chip->of_node);
+}
+
+void of_gpiochip_remove(struct gpio_chip *chip)
+{
+ if (chip->of_node)
+ of_node_put(chip->of_node);
+}
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 5a75510d66b..38353c028fd 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1156,7 +1156,7 @@ EXPORT_SYMBOL_GPL(gpiochip_remove);
*/
struct gpio_chip *gpiochip_find(const void *data,
int (*match)(struct gpio_chip *chip,
- const void *data))
+ void *data))
{
struct gpio_chip *chip = NULL;
unsigned long flags;
@@ -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);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-16 01:31:22 +0000