diff options
| author | Matteo Croce <matteo@openwrt.org> | 2008-01-12 16:41:28 +0000 |
|---|---|---|
| committer | Matteo Croce <matteo@openwrt.org> | 2008-01-12 16:41:28 +0000 |
| commit | f1b788d21c97eaaf0220fead447049b5328d4d08 (patch) | |
| tree | 41c6ab1a19eb6439a7ded7d87db1ccb24b4f2c60 /target/linux/ar7/files | |
| parent | a2f8bbfe100bf59e3ccc50a059003350329ba248 (diff) | |
| download | upstream-f1b788d21c97eaaf0220fead447049b5328d4d08.tar.gz upstream-f1b788d21c97eaaf0220fead447049b5328d4d08.tar.bz2 upstream-f1b788d21c97eaaf0220fead447049b5328d4d08.zip | |
[AR7] cache GPIO addresses to be more efficent
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10179 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/ar7/files')
| -rw-r--r-- | target/linux/ar7/files/include/asm-mips/ar7/gpio.h | 19 |
1 files changed, 14 insertions, 5 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 2e19fcae9d..7d665ff62d 100644 --- a/target/linux/ar7/files/include/asm-mips/ar7/gpio.h +++ b/target/linux/ar7/files/include/asm-mips/ar7/gpio.h @@ -28,19 +28,28 @@ extern void gpio_free(unsigned gpio); /* Common GPIO layer */ static inline int gpio_get_value(unsigned gpio) { - void __iomem *gpio_in = - (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_INPUT); + static unsigned addr; - return readl(gpio_in) & (1 << gpio); + if (!addr) { + void __iomem *gpio_in = (void __iomem *) + KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_INPUT); + addr = readl(gpio_in); + } + + return addr & (1 << gpio); } static inline void gpio_set_value(unsigned gpio, int value) { + static unsigned addr; + unsigned tmp; + void __iomem *gpio_out = (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_OUTPUT); - unsigned tmp; + if (!addr) + addr = readl(gpio_out); - tmp = readl(gpio_out) & ~(1 << gpio); + tmp = addr & ~(1 << gpio); if (value) tmp |= 1 << gpio; writel(tmp, gpio_out); |