diff options
Diffstat (limited to 'target/linux/cns3xxx/patches/104-cns3xxx_gpio.patch')
| -rw-r--r-- | target/linux/cns3xxx/patches/104-cns3xxx_gpio.patch | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/target/linux/cns3xxx/patches/104-cns3xxx_gpio.patch b/target/linux/cns3xxx/patches/104-cns3xxx_gpio.patch new file mode 100644 index 0000000000..15a9f36728 --- /dev/null +++ b/target/linux/cns3xxx/patches/104-cns3xxx_gpio.patch @@ -0,0 +1,142 @@ +--- a/arch/arm/mach-cns3xxx/cns3420vb.c ++++ b/arch/arm/mach-cns3xxx/cns3420vb.c +@@ -191,7 +191,7 @@ 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/cache-l2x0.h> + #include <asm/hardware/gic.h> + #include <asm/smp_twd.h> ++#include <asm/gpio.h> + #include <mach/cns3xxx.h> + #include "core.h" + +@@ -80,7 +81,89 @@ 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) + { + iotable_init(cns3xxx_io_desc, ARRAY_SIZE(cns3xxx_io_desc)); + #ifdef CONFIG_CACHE_L2X0 +@@ -95,6 +178,7 @@ void __init cns3xxx_map_io(void) + #ifdef CONFIG_LOCAL_TIMERS + twd_base = (void __iomem *) CNS3XXX_TC11MP_TWD_BASE_VIRT; + #endif ++ gpiochip_add(&cns3xxx_gpio_chip); + } + + /* used by entry-macro.S */ +--- a/arch/arm/mach-cns3xxx/core.h ++++ b/arch/arm/mach-cns3xxx/core.h +@@ -13,7 +13,7 @@ + + extern struct sys_timer cns3xxx_timer; + +-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 +@@ -520,7 +520,7 @@ 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(); |