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| author | Eugene Konev <ejka@imfi.kspu.ru> | 2007-09-21 12:37:50 +0000 |
|---|---|---|
| committer | Eugene Konev <ejka@imfi.kspu.ru> | 2007-09-21 12:37:50 +0000 |
| commit | 041a03c5bdb4339f3ed2bc90268747de5b20c951 (patch) | |
| tree | 9be165a8c4ae82520674a61cefae303e06c03de5 /target/linux/ar7/files/include | |
| parent | d725c9b25be261a9cdde4b83ff00ed0744fe9c7d (diff) | |
| download | mtk-20170518-041a03c5bdb4339f3ed2bc90268747de5b20c951.zip mtk-20170518-041a03c5bdb4339f3ed2bc90268747de5b20c951.tar.gz mtk-20170518-041a03c5bdb4339f3ed2bc90268747de5b20c951.tar.bz2 | |
make gpio conformant to generic gpio spec.
SVN-Revision: 8911
Diffstat (limited to 'target/linux/ar7/files/include')
| -rw-r--r-- | target/linux/ar7/files/include/asm-mips/ar7/gpio.h | 53 |
1 files changed, 27 insertions, 26 deletions
diff --git a/target/linux/ar7/files/include/asm-mips/ar7/gpio.h b/target/linux/ar7/files/include/asm-mips/ar7/gpio.h index c82ba78..a7ae1ee 100644 --- a/target/linux/ar7/files/include/asm-mips/ar7/gpio.h +++ b/target/linux/ar7/files/include/asm-mips/ar7/gpio.h @@ -22,24 +22,37 @@ #define AR7_GPIO_MAX 32 -extern int gpio_request(unsigned gpio, char *label); +extern int gpio_request(unsigned gpio, const char *label); extern void gpio_free(unsigned gpio); /* Common GPIO layer */ -static inline int gpio_direction_input(unsigned gpio) +static inline int gpio_get_value(unsigned gpio) { - void __iomem *gpio_dir = - (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR); + void __iomem *gpio_in = + (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_INPUT); if (gpio >= AR7_GPIO_MAX) return -EINVAL; - writel(readl(gpio_dir) | (1 << gpio), gpio_dir); + return ((readl(gpio_in) & (1 << gpio)) != 0); +} - return 0; +static inline void gpio_set_value(unsigned gpio, int value) +{ + void __iomem *gpio_out = + (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_OUTPUT); + volatile unsigned tmp; + + if (gpio >= AR7_GPIO_MAX) + return; + + tmp = readl(gpio_out) & ~(1 << gpio); + if (value) + tmp |= 1 << gpio; + writel(tmp, gpio_out); } -static inline int gpio_direction_output(unsigned gpio) +static inline int gpio_direction_input(unsigned gpio) { void __iomem *gpio_dir = (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR); @@ -47,35 +60,23 @@ static inline int gpio_direction_output(unsigned gpio) if (gpio >= AR7_GPIO_MAX) return -EINVAL; - writel(readl(gpio_dir) & ~(1 << gpio), gpio_dir); + writel(readl(gpio_dir) | (1 << gpio), gpio_dir); return 0; } -static inline int gpio_get_value(unsigned gpio) +static inline int gpio_direction_output(unsigned gpio, int value) { - void __iomem *gpio_in = - (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_INPUT); + void __iomem *gpio_dir = + (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR); if (gpio >= AR7_GPIO_MAX) return -EINVAL; - return ((readl(gpio_in) & (1 << gpio)) != 0); -} - -static inline void gpio_set_value(unsigned gpio, int value) -{ - void __iomem *gpio_out = - (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_OUTPUT); - volatile unsigned tmp; - - if (gpio >= AR7_GPIO_MAX) - return; + gpio_set_value(gpio, value); + writel(readl(gpio_dir) & ~(1 << gpio), gpio_dir); - tmp = readl(gpio_out) & ~(1 << gpio); - if (value) - tmp |= 1 << gpio; - writel(tmp, gpio_out); + return 0; } static inline int gpio_to_irq(unsigned gpio) |