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path: root/drivers/gpio/gpio-samsung.c
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Diffstat (limited to 'drivers/gpio/gpio-samsung.c')
-rw-r--r--drivers/gpio/gpio-samsung.c108
1 files changed, 96 insertions, 12 deletions
diff --git a/drivers/gpio/gpio-samsung.c b/drivers/gpio/gpio-samsung.c
index 866251852719..0a79a1167a25 100644
--- a/drivers/gpio/gpio-samsung.c
+++ b/drivers/gpio/gpio-samsung.c
@@ -22,8 +22,11 @@
#include <linux/spinlock.h>
#include <linux/module.h>
#include <linux/interrupt.h>
-#include <linux/sysdev.h>
+#include <linux/device.h>
#include <linux/ioport.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <linux/of_address.h>
#include <asm/irq.h>
@@ -230,7 +233,7 @@ static int samsung_gpio_setcfg_2bit(struct samsung_gpio_chip *chip,
* @chip: The gpio chip that is being configured.
* @off: The offset for the GPIO being configured.
*
- * The reverse of samsung_gpio_setcfg_2bit(). Will return a value whicg
+ * The reverse of samsung_gpio_setcfg_2bit(). Will return a value which
* could be directly passed back to samsung_gpio_setcfg_2bit(), from the
* S3C_GPIO_SPECIAL() macro.
*/
@@ -467,33 +470,42 @@ static struct samsung_gpio_cfg s5p64x0_gpio_cfg_rbank = {
#endif
static struct samsung_gpio_cfg samsung_gpio_cfgs[] = {
- {
+ [0] = {
.cfg_eint = 0x0,
- }, {
+ },
+ [1] = {
.cfg_eint = 0x3,
- }, {
+ },
+ [2] = {
.cfg_eint = 0x7,
- }, {
+ },
+ [3] = {
.cfg_eint = 0xF,
- }, {
+ },
+ [4] = {
.cfg_eint = 0x0,
.set_config = samsung_gpio_setcfg_2bit,
.get_config = samsung_gpio_getcfg_2bit,
- }, {
+ },
+ [5] = {
.cfg_eint = 0x2,
.set_config = samsung_gpio_setcfg_2bit,
.get_config = samsung_gpio_getcfg_2bit,
- }, {
+ },
+ [6] = {
.cfg_eint = 0x3,
.set_config = samsung_gpio_setcfg_2bit,
.get_config = samsung_gpio_getcfg_2bit,
- }, {
+ },
+ [7] = {
.set_config = samsung_gpio_setcfg_2bit,
.get_config = samsung_gpio_getcfg_2bit,
- }, {
+ },
+ [8] = {
.set_pull = exynos4_gpio_setpull,
.get_pull = exynos4_gpio_getpull,
- }, {
+ },
+ [9] = {
.cfg_eint = 0x3,
.set_pull = exynos4_gpio_setpull,
.get_pull = exynos4_gpio_getpull,
@@ -2374,6 +2386,66 @@ static struct samsung_gpio_chip exynos4_gpios_3[] = {
#endif
};
+#if defined(CONFIG_ARCH_EXYNOS4) && defined(CONFIG_OF)
+static int exynos4_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 < 4))
+ 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]))
+ pr_warn("gpio_xlate: failed to set pin pull up/down\n");
+ if (s5p_gpio_set_drvstr(pin, gpiospec->args[3]))
+ pr_warn("gpio_xlate: failed to set pin drive strength\n");
+
+ return gpiospec->args[0];
+}
+
+static const struct of_device_id exynos4_gpio_dt_match[] __initdata = {
+ { .compatible = "samsung,exynos4-gpio", },
+ {}
+};
+
+static __init void exynos4_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,
+ exynos4_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 = 4;
+ gc->of_xlate = exynos4_gpio_xlate;
+}
+#elif defined(CONFIG_ARCH_EXYNOS4)
+static __init void exynos4_gpiolib_attach_ofnode(struct samsung_gpio_chip *chip,
+ u64 base, u64 offset)
+{
+ return;
+}
+#endif /* defined(CONFIG_ARCH_EXYNOS4) && defined(CONFIG_OF) */
+
/* TODO: cleanup soc_is_* */
static __init int samsung_gpiolib_init(void)
{
@@ -2455,6 +2527,10 @@ static __init int samsung_gpiolib_init(void)
chip->config = &exynos4_gpio_cfg;
chip->group = group++;
}
+#ifdef CONFIG_CPU_EXYNOS4210
+ exynos4_gpiolib_attach_ofnode(chip,
+ EXYNOS4_PA_GPIO1, i * 0x20);
+#endif
}
samsung_gpiolib_add_4bit_chips(exynos4_gpios_1, nr_chips, S5P_VA_GPIO1);
@@ -2467,6 +2543,10 @@ static __init int samsung_gpiolib_init(void)
chip->config = &exynos4_gpio_cfg;
chip->group = group++;
}
+#ifdef CONFIG_CPU_EXYNOS4210
+ exynos4_gpiolib_attach_ofnode(chip,
+ EXYNOS4_PA_GPIO2, i * 0x20);
+#endif
}
samsung_gpiolib_add_4bit_chips(exynos4_gpios_2, nr_chips, S5P_VA_GPIO2);
@@ -2479,6 +2559,10 @@ static __init int samsung_gpiolib_init(void)
chip->config = &exynos4_gpio_cfg;
chip->group = group++;
}
+#ifdef CONFIG_CPU_EXYNOS4210
+ exynos4_gpiolib_attach_ofnode(chip,
+ EXYNOS4_PA_GPIO3, i * 0x20);
+#endif
}
samsung_gpiolib_add_4bit_chips(exynos4_gpios_3, nr_chips, S5P_VA_GPIO3);