diff options
| author | Matteo Croce <rootkit85@yahoo.it> | 2008-01-12 16:41:28 +0000 |
|---|---|---|
| committer | Matteo Croce <rootkit85@yahoo.it> | 2008-01-12 16:41:28 +0000 |
| commit | fae9e82aad968f65cf2d8b3a8f5db11f3f1e88d6 (patch) | |
| tree | 2ec4334c7627780dd4b5f122ecc6632fb2714fff /target/linux/ar7/files | |
| parent | 6993d2138ce6a4c03d72ddd0b3f15eaa26b72c3f (diff) | |
| download | mtk-20170518-fae9e82aad968f65cf2d8b3a8f5db11f3f1e88d6.zip mtk-20170518-fae9e82aad968f65cf2d8b3a8f5db11f3f1e88d6.tar.gz mtk-20170518-fae9e82aad968f65cf2d8b3a8f5db11f3f1e88d6.tar.bz2 | |
cache GPIO addresses to be more efficent
SVN-Revision: 10179
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 2e19fca..7d665ff 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); |