From: Domenico Andreoli <cavokz@xxxxxxxxx>
Assign proper OF node (= with matching physical base address) to each
s3c24xx GPIO chip.
Signed-off-by: Domenico Andreoli <cavokz@xxxxxxxxx>
---
arch/arm/plat-s3c24xx/gpiolib.c | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
Index: b/arch/arm/plat-s3c24xx/gpiolib.c
===================================================================
--- a/arch/arm/plat-s3c24xx/gpiolib.c 2011-04-10 23:28:31.000000000 +0200
+++ b/arch/arm/plat-s3c24xx/gpiolib.c 2011-04-11 11:23:36.000000000 +0200
@@ -19,6 +19,8 @@
#include <linux/ioport.h>
#include <linux/io.h>
#include <linux/gpio.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
#include <plat/gpio-core.h>
#include <plat/gpio-cfg.h>
@@ -210,6 +212,39 @@
},
};
+#ifdef CONFIG_OF_GPIO
+
+static void s3c24xx_attach_of_node(struct s3c_gpio_chip *chip)
+{
+ struct device_node *dn;
+ struct resource res;
+ const char *dt_compat;
+
+ if (chip->base == S3C2410_GPACON)
+ dt_compat = "samsung,s3c2410-gpio-a";
+ else
+ dt_compat = "samsung,s3c2410-gpio";
+
+ for_each_compatible_node(dn, NULL, dt_compat) {
+ if (of_address_to_resource(dn, 0, &res) < 0) {
+ printk(KERN_ERR "%s: unable to translate DT address\n", dn->full_name);
+ continue;
+ }
+
+ if (chip->base == (res.start - S3C24XX_PA_GPIO + S3C24XX_VA_GPIO)) {
+ chip->chip.of_node = dn;
+ break;
+ }
+ }
+}
+
+#else
+
+static void s3c24xx_attach_of_node(struct s3c_gpio_chip *chip)
+{
+}
+
+#endif
static __init int s3c24xx_gpiolib_init(void)
{
@@ -220,6 +255,7 @@
if (!chip->config)
chip->config = &s3c24xx_gpiocfg_default;
+ s3c24xx_attach_of_node(chip);
s3c_gpiolib_add(chip);
}
--
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