aboutsummaryrefslogtreecommitdiff
path: root/drivers/gpio
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpio-omap.c15
-rw-r--r--drivers/gpio/gpio-pxa.c77
-rw-r--r--drivers/gpio/gpio-samsung.c63
-rw-r--r--drivers/gpio/gpio-twl4030.c90
4 files changed, 155 insertions, 90 deletions
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index e6efd77668f0..64fbce30c502 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -25,11 +25,9 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/irqdomain.h>
+#include <linux/gpio.h>
+#include <linux/platform_data/gpio-omap.h>
-#include <mach/hardware.h>
-#include <asm/irq.h>
-#include <mach/irqs.h>
-#include <asm/gpio.h>
#include <asm/mach/irq.h>
#define OFF_MODE 1
@@ -385,13 +383,16 @@ static int _set_gpio_triggering(struct gpio_bank *bank, int gpio,
static int gpio_irq_type(struct irq_data *d, unsigned type)
{
struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
- unsigned gpio;
+ unsigned gpio = 0;
int retval;
unsigned long flags;
- if (!cpu_class_is_omap2() && d->irq > IH_MPUIO_BASE)
+#ifdef CONFIG_ARCH_OMAP1
+ if (d->irq > IH_MPUIO_BASE)
gpio = OMAP_MPUIO(d->irq - IH_MPUIO_BASE);
- else
+#endif
+
+ if (!gpio)
gpio = irq_to_gpio(bank, d->irq);
if (type & ~IRQ_TYPE_SENSE_MASK)
diff --git a/drivers/gpio/gpio-pxa.c b/drivers/gpio/gpio-pxa.c
index 9cac88a65f78..9528779ca463 100644
--- a/drivers/gpio/gpio-pxa.c
+++ b/drivers/gpio/gpio-pxa.c
@@ -26,6 +26,8 @@
#include <linux/syscore_ops.h>
#include <linux/slab.h>
+#include <asm/mach/irq.h>
+
#include <mach/irqs.h>
/*
@@ -59,6 +61,7 @@
#define BANK_OFF(n) (((n) < 3) ? (n) << 2 : 0x100 + (((n) - 3) << 2))
int pxa_last_gpio;
+static int irq_base;
#ifdef CONFIG_OF
static struct irq_domain *domain;
@@ -167,63 +170,14 @@ static inline int __gpio_is_occupied(unsigned gpio)
return ret;
}
-#ifdef CONFIG_ARCH_PXA
-static inline int __pxa_gpio_to_irq(int gpio)
-{
- if (gpio_is_pxa_type(gpio_type))
- return PXA_GPIO_TO_IRQ(gpio);
- return -1;
-}
-
-static inline int __pxa_irq_to_gpio(int irq)
-{
- if (gpio_is_pxa_type(gpio_type))
- return irq - PXA_GPIO_TO_IRQ(0);
- return -1;
-}
-#else
-static inline int __pxa_gpio_to_irq(int gpio) { return -1; }
-static inline int __pxa_irq_to_gpio(int irq) { return -1; }
-#endif
-
-#ifdef CONFIG_ARCH_MMP
-static inline int __mmp_gpio_to_irq(int gpio)
-{
- if (gpio_is_mmp_type(gpio_type))
- return MMP_GPIO_TO_IRQ(gpio);
- return -1;
-}
-
-static inline int __mmp_irq_to_gpio(int irq)
-{
- if (gpio_is_mmp_type(gpio_type))
- return irq - MMP_GPIO_TO_IRQ(0);
- return -1;
-}
-#else
-static inline int __mmp_gpio_to_irq(int gpio) { return -1; }
-static inline int __mmp_irq_to_gpio(int irq) { return -1; }
-#endif
-
static int pxa_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
{
- int gpio, ret;
-
- gpio = chip->base + offset;
- ret = __pxa_gpio_to_irq(gpio);
- if (ret >= 0)
- return ret;
- return __mmp_gpio_to_irq(gpio);
+ return chip->base + offset + irq_base;
}
int pxa_irq_to_gpio(int irq)
{
- int ret;
-
- ret = __pxa_irq_to_gpio(irq);
- if (ret >= 0)
- return ret;
- return __mmp_irq_to_gpio(irq);
+ return irq - irq_base;
}
static int pxa_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
@@ -403,6 +357,9 @@ static void pxa_gpio_demux_handler(unsigned int irq, struct irq_desc *desc)
struct pxa_gpio_chip *c;
int loop, gpio, gpio_base, n;
unsigned long gedr;
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+
+ chained_irq_enter(chip, desc);
do {
loop = 0;
@@ -422,6 +379,8 @@ static void pxa_gpio_demux_handler(unsigned int irq, struct irq_desc *desc)
}
}
} while (loop);
+
+ chained_irq_exit(chip, desc);
}
static void pxa_ack_muxed_gpio(struct irq_data *d)
@@ -535,7 +494,7 @@ const struct irq_domain_ops pxa_irq_domain_ops = {
static int __devinit pxa_gpio_probe_dt(struct platform_device *pdev)
{
- int ret, nr_banks, nr_gpios, irq_base;
+ int ret, nr_banks, nr_gpios;
struct device_node *prev, *next, *np = pdev->dev.of_node;
const struct of_device_id *of_id =
of_match_device(pxa_gpio_dt_ids, &pdev->dev);
@@ -590,10 +549,20 @@ static int __devinit pxa_gpio_probe(struct platform_device *pdev)
int irq0 = 0, irq1 = 0, irq_mux, gpio_offset = 0;
ret = pxa_gpio_probe_dt(pdev);
- if (ret < 0)
+ if (ret < 0) {
pxa_last_gpio = pxa_gpio_nums();
- else
+#ifdef CONFIG_ARCH_PXA
+ if (gpio_is_pxa_type(gpio_type))
+ irq_base = PXA_GPIO_TO_IRQ(0);
+#endif
+#ifdef CONFIG_ARCH_MMP
+ if (gpio_is_mmp_type(gpio_type))
+ irq_base = MMP_GPIO_TO_IRQ(0);
+#endif
+ } else {
use_of = 1;
+ }
+
if (!pxa_last_gpio)
return -EINVAL;
diff --git a/drivers/gpio/gpio-samsung.c b/drivers/gpio/gpio-samsung.c
index ba126cc04073..f4814a889a5b 100644
--- a/drivers/gpio/gpio-samsung.c
+++ b/drivers/gpio/gpio-samsung.c
@@ -938,6 +938,67 @@ static void __init samsung_gpiolib_add(struct samsung_gpio_chip *chip)
s3c_gpiolib_track(chip);
}
+#if defined(CONFIG_PLAT_S3C24XX) && defined(CONFIG_OF)
+static int s3c24xx_gpio_xlate(struct gpio_chip *gc,
+ const struct of_phandle_args *gpiospec, u32 *flags)
+{
+ unsigned int pin;
+
+ if (WARN_ON(gc->of_gpio_n_cells < 3))
+ return -EINVAL;
+
+ if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
+ return -EINVAL;
+
+ if (gpiospec->args[0] > gc->ngpio)
+ return -EINVAL;
+
+ pin = gc->base + gpiospec->args[0];
+
+ if (s3c_gpio_cfgpin(pin, S3C_GPIO_SFN(gpiospec->args[1])))
+ pr_warn("gpio_xlate: failed to set pin function\n");
+ if (s3c_gpio_setpull(pin, gpiospec->args[2] & 0xffff))
+ pr_warn("gpio_xlate: failed to set pin pull up/down\n");
+
+ if (flags)
+ *flags = gpiospec->args[2] >> 16;
+
+ return gpiospec->args[0];
+}
+
+static const struct of_device_id s3c24xx_gpio_dt_match[] __initdata = {
+ { .compatible = "samsung,s3c24xx-gpio", },
+ {}
+};
+
+static __init void s3c24xx_gpiolib_attach_ofnode(struct samsung_gpio_chip *chip,
+ u64 base, u64 offset)
+{
+ struct gpio_chip *gc = &chip->chip;
+ u64 address;
+
+ if (!of_have_populated_dt())
+ return;
+
+ address = chip->base ? base + ((u32)chip->base & 0xfff) : base + offset;
+ gc->of_node = of_find_matching_node_by_address(NULL,
+ s3c24xx_gpio_dt_match, address);
+ if (!gc->of_node) {
+ pr_info("gpio: device tree node not found for gpio controller"
+ " with base address %08llx\n", address);
+ return;
+ }
+ gc->of_gpio_n_cells = 3;
+ gc->of_xlate = s3c24xx_gpio_xlate;
+}
+#else
+static __init void s3c24xx_gpiolib_attach_ofnode(struct samsung_gpio_chip *chip,
+ u64 base, u64 offset)
+{
+ return;
+}
+#endif /* defined(CONFIG_PLAT_S3C24XX) && defined(CONFIG_OF) */
+
static void __init s3c24xx_gpiolib_add_chips(struct samsung_gpio_chip *chip,
int nr_chips, void __iomem *base)
{
@@ -962,6 +1023,8 @@ static void __init s3c24xx_gpiolib_add_chips(struct samsung_gpio_chip *chip,
gc->direction_output = samsung_gpiolib_2bit_output;
samsung_gpiolib_add(chip);
+
+ s3c24xx_gpiolib_attach_ofnode(chip, S3C24XX_PA_GPIO, i * 0x10);
}
}
diff --git a/drivers/gpio/gpio-twl4030.c b/drivers/gpio/gpio-twl4030.c
index 94256fe7bf36..c5f8ca233e1f 100644
--- a/drivers/gpio/gpio-twl4030.c
+++ b/drivers/gpio/gpio-twl4030.c
@@ -51,6 +51,7 @@
static struct gpio_chip twl_gpiochip;
+static int twl4030_gpio_base;
static int twl4030_gpio_irq_base;
/* genirq interfaces are not available to modules */
@@ -395,6 +396,29 @@ static int __devinit gpio_twl4030_debounce(u32 debounce, u8 mmc_cd)
static int gpio_twl4030_remove(struct platform_device *pdev);
+static struct twl4030_gpio_platform_data *of_gpio_twl4030(struct device *dev)
+{
+ struct twl4030_gpio_platform_data *omap_twl_info;
+
+ omap_twl_info = devm_kzalloc(dev, sizeof(*omap_twl_info), GFP_KERNEL);
+ if (!omap_twl_info)
+ return NULL;
+
+ omap_twl_info->use_leds = of_property_read_bool(dev->of_node,
+ "ti,use-leds");
+
+ of_property_read_u32(dev->of_node, "ti,debounce",
+ &omap_twl_info->debounce);
+ of_property_read_u32(dev->of_node, "ti,mmc-cd",
+ (u32 *)&omap_twl_info->mmc_cd);
+ of_property_read_u32(dev->of_node, "ti,pullups",
+ &omap_twl_info->pullups);
+ of_property_read_u32(dev->of_node, "ti,pulldowns",
+ &omap_twl_info->pulldowns);
+
+ return omap_twl_info;
+}
+
static int __devinit gpio_twl4030_probe(struct platform_device *pdev)
{
struct twl4030_gpio_platform_data *pdata = pdev->dev.platform_data;
@@ -427,49 +451,57 @@ no_irqs:
twl_gpiochip.ngpio = TWL4030_GPIO_MAX;
twl_gpiochip.dev = &pdev->dev;
- if (pdata) {
- twl_gpiochip.base = pdata->gpio_base;
+ if (node)
+ pdata = of_gpio_twl4030(&pdev->dev);
- /*
- * NOTE: boards may waste power if they don't set pullups
- * and pulldowns correctly ... default for non-ULPI pins is
- * pulldown, and some other pins may have external pullups
- * or pulldowns. Careful!
- */
- ret = gpio_twl4030_pulls(pdata->pullups, pdata->pulldowns);
- if (ret)
- dev_dbg(&pdev->dev, "pullups %.05x %.05x --> %d\n",
- pdata->pullups, pdata->pulldowns,
- ret);
-
- ret = gpio_twl4030_debounce(pdata->debounce, pdata->mmc_cd);
- if (ret)
- dev_dbg(&pdev->dev, "debounce %.03x %.01x --> %d\n",
- pdata->debounce, pdata->mmc_cd,
- ret);
-
- /*
- * NOTE: we assume VIBRA_CTL.VIBRA_EN, in MODULE_AUDIO_VOICE,
- * is (still) clear if use_leds is set.
- */
- if (pdata->use_leds)
- twl_gpiochip.ngpio += 2;
+ if (pdata == NULL) {
+ dev_err(&pdev->dev, "Platform data is missing\n");
+ return -ENXIO;
}
+ /*
+ * NOTE: boards may waste power if they don't set pullups
+ * and pulldowns correctly ... default for non-ULPI pins is
+ * pulldown, and some other pins may have external pullups
+ * or pulldowns. Careful!
+ */
+ ret = gpio_twl4030_pulls(pdata->pullups, pdata->pulldowns);
+ if (ret)
+ dev_dbg(&pdev->dev, "pullups %.05x %.05x --> %d\n",
+ pdata->pullups, pdata->pulldowns, ret);
+
+ ret = gpio_twl4030_debounce(pdata->debounce, pdata->mmc_cd);
+ if (ret)
+ dev_dbg(&pdev->dev, "debounce %.03x %.01x --> %d\n",
+ pdata->debounce, pdata->mmc_cd, ret);
+
+ /*
+ * NOTE: we assume VIBRA_CTL.VIBRA_EN, in MODULE_AUDIO_VOICE,
+ * is (still) clear if use_leds is set.
+ */
+ if (pdata->use_leds)
+ twl_gpiochip.ngpio += 2;
+
ret = gpiochip_add(&twl_gpiochip);
if (ret < 0) {
dev_err(&pdev->dev, "could not register gpiochip, %d\n", ret);
twl_gpiochip.ngpio = 0;
gpio_twl4030_remove(pdev);
- } else if (pdata && pdata->setup) {
+ goto out;
+ }
+
+ twl4030_gpio_base = twl_gpiochip.base;
+
+ if (pdata && pdata->setup) {
int status;
status = pdata->setup(&pdev->dev,
- pdata->gpio_base, TWL4030_GPIO_MAX);
+ twl4030_gpio_base, TWL4030_GPIO_MAX);
if (status)
dev_dbg(&pdev->dev, "setup --> %d\n", status);
}
+out:
return ret;
}
@@ -481,7 +513,7 @@ static int gpio_twl4030_remove(struct platform_device *pdev)
if (pdata && pdata->teardown) {
status = pdata->teardown(&pdev->dev,
- pdata->gpio_base, TWL4030_GPIO_MAX);
+ twl4030_gpio_base, TWL4030_GPIO_MAX);
if (status) {
dev_dbg(&pdev->dev, "teardown --> %d\n", status);
return status;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-26 18:23:07 +0000