openwrt-xburst/target/linux/cns3xxx/patches/104-cns3xxx_gpio.patch

--- a/arch/arm/mach-cns3xxx/cns3420vb.c
+++ b/arch/arm/mach-cns3xxx/cns3420vb.c
@@ -215,7 +215,7 @@ static struct map_desc cns3420_io_desc[]
 
 static void __init cns3420_map_io(void)
 {
-	cns3xxx_map_io();
+	cns3xxx_common_init();
 	iotable_init(cns3420_io_desc, ARRAY_SIZE(cns3420_io_desc));
 
 	cns3420_early_serial_setup();
--- a/arch/arm/mach-cns3xxx/core.c
+++ b/arch/arm/mach-cns3xxx/core.c
@@ -18,6 +18,7 @@
 #include <asm/hardware/gic.h>
 #include <asm/smp_twd.h>
 #include <asm/hardware/cache-l2x0.h>
+#include <asm/gpio.h>
 #include <mach/cns3xxx.h>
 #include "core.h"
 
@@ -75,12 +76,96 @@ static struct map_desc cns3xxx_io_desc[]
 	},
 };
 
-void __init cns3xxx_map_io(void)
+int gpio_to_irq(int gpio)
+{
+	if (gpio > 63)
+		return -EINVAL;
+
+	if (gpio < 32)
+		return IRQ_CNS3XXX_GPIOA;
+	else
+		return IRQ_CNS3XXX_GPIOB;
+}
+EXPORT_SYMBOL(gpio_to_irq);
+
+int irq2gpio(int irq)
+{
+	if (irq == IRQ_CNS3XXX_GPIOA)
+		return 0;
+	else if (irq == IRQ_CNS3XXX_GPIOB)
+		return 32;
+	else
+		return -EINVAL;
+}
+EXPORT_SYMBOL(irq2gpio);
+
+static inline void gpio_line_config(u8 line, u32 direction)
+{
+	u32 reg;
+	if (direction) {
+		if (line < 32) {
+			reg = __raw_readl(CNS3XXX_GPIOA_BASE_VIRT + CNS3XXX_GPIO_DIR);
+			reg |= (1 << line);
+			__raw_writel(reg, CNS3XXX_GPIOA_BASE_VIRT + CNS3XXX_GPIO_DIR);
+		} else {
+			reg = __raw_readl(CNS3XXX_GPIOB_BASE_VIRT + CNS3XXX_GPIO_DIR);
+			reg |= (1 << (line - 32));
+			__raw_writel(reg, CNS3XXX_GPIOB_BASE_VIRT + CNS3XXX_GPIO_DIR);
+		}
+	} else {
+		if (line < 32) {
+			reg = __raw_readl(CNS3XXX_GPIOA_BASE_VIRT + CNS3XXX_GPIO_DIR);
+			reg &= ~(1 << line);
+			__raw_writel(reg, CNS3XXX_GPIOA_BASE_VIRT + CNS3XXX_GPIO_DIR);
+		} else {
+			reg = __raw_readl(CNS3XXX_GPIOB_BASE_VIRT + CNS3XXX_GPIO_DIR);
+			reg &= ~(1 << (line - 32));
+			__raw_writel(reg, CNS3XXX_GPIOB_BASE_VIRT + CNS3XXX_GPIO_DIR);
+		}
+	}
+}
+
+static int cns3xxx_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
+{
+	gpio_line_config(gpio, CNS3XXX_GPIO_IN);
+	return 0;
+}
+
+static int cns3xxx_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int level)
+{
+	gpio_line_set(gpio, level);
+	gpio_line_config(gpio, CNS3XXX_GPIO_OUT);
+	return 0;
+}
+
+static int cns3xxx_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
+{
+	return gpio_get_value(gpio);
+}
+
+static void cns3xxx_gpio_set_value(struct gpio_chip *chip, unsigned gpio, int value)
+{
+	gpio_set_value(gpio, value);
+}
+
+static struct gpio_chip cns3xxx_gpio_chip = {
+	.label			= "CNS3XXX_GPIO_CHIP",
+	.direction_input	= cns3xxx_gpio_direction_input,
+	.direction_output	= cns3xxx_gpio_direction_output,
+	.get			= cns3xxx_gpio_get_value,
+	.set			= cns3xxx_gpio_set_value,
+	.base			= 0,
+	.ngpio			= 64,
+};
+
+void __init cns3xxx_common_init(void)
 {
 #ifdef CONFIG_LOCAL_TIMERS
 	twd_base = (void __iomem *) CNS3XXX_TC11MP_TWD_BASE_VIRT;
 #endif
 	iotable_init(cns3xxx_io_desc, ARRAY_SIZE(cns3xxx_io_desc));
+
+	gpiochip_add(&cns3xxx_gpio_chip);
 }
 
 /* used by entry-macro.S */
--- a/arch/arm/mach-cns3xxx/core.h
+++ b/arch/arm/mach-cns3xxx/core.h
@@ -20,7 +20,7 @@ void __init cns3xxx_l2x0_init(void);
 static inline void cns3xxx_l2x0_init(void) {}
 #endif /* CONFIG_CACHE_L2X0 */
 
-void __init cns3xxx_map_io(void);
+void __init cns3xxx_common_init(void);
 void __init cns3xxx_init_irq(void);
 void cns3xxx_power_off(void);
 
--- a/arch/arm/mach-cns3xxx/laguna.c
+++ b/arch/arm/mach-cns3xxx/laguna.c
@@ -611,7 +611,7 @@ static struct map_desc laguna_io_desc[]
 
 static void __init laguna_map_io(void)
 {
-	cns3xxx_map_io();
+	cns3xxx_common_init();
 	iotable_init(laguna_io_desc, ARRAY_SIZE(laguna_io_desc));
 	laguna_early_serial_setup();
 }