diff options
| author | Charulatha V <charu@ti.com> | 2011-05-02 15:21:42 +0530 |
|---|---|---|
| committer | Nishanth Menon <nm@ti.com> | 2011-07-14 11:53:32 -0700 |
| commit | a6efb2eb5e10b1d571d7764690faa18360136afd (patch) | |
| tree | d81436e67e1d52aaf24ce3df1dd3054db44b867b /drivers/gpio | |
| parent | bb91e4c882908347933576a17ef9717477402be5 (diff) | |
| download | kernel_samsung_tuna-a6efb2eb5e10b1d571d7764690faa18360136afd.zip kernel_samsung_tuna-a6efb2eb5e10b1d571d7764690faa18360136afd.tar.gz kernel_samsung_tuna-a6efb2eb5e10b1d571d7764690faa18360136afd.tar.bz2 | |
GPIO: OMAP: Avoid cpu checks during module ena/disable
Remove cpu-is checks while enabling/disabling OMAP GPIO module during a gpio
request/free.
Signed-off-by: Charulatha V <charu@ti.com>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-omap.c | 53 |
1 files changed, 23 insertions, 30 deletions
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 0fb37d3..4ac02b4 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -83,6 +83,7 @@ struct gpio_bank { #define GPIO_INDEX(bank, gpio) (gpio % bank->width) #define GPIO_BIT(bank, gpio) (1 << GPIO_INDEX(bank, gpio)) +#define GPIO_MOD_CTRL_BIT BIT(0) static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input) { @@ -573,22 +574,18 @@ static int omap_gpio_request(struct gpio_chip *chip, unsigned offset) __raw_writel(__raw_readl(reg) | (1 << offset), reg); } #endif - if (!cpu_class_is_omap1()) { - if (!bank->mod_usage) { - void __iomem *reg = bank->base; - u32 ctrl; - - if (cpu_is_omap24xx() || cpu_is_omap34xx()) - reg += OMAP24XX_GPIO_CTRL; - else if (cpu_is_omap44xx()) - reg += OMAP4_GPIO_CTRL; - ctrl = __raw_readl(reg); - /* Module is enabled, clocks are not gated */ - ctrl &= 0xFFFFFFFE; - __raw_writel(ctrl, reg); - } - bank->mod_usage |= 1 << offset; + if (bank->regs->ctrl && !bank->mod_usage) { + void __iomem *reg = bank->base + bank->regs->ctrl; + u32 ctrl; + + ctrl = __raw_readl(reg); + /* Module is enabled, clocks are not gated */ + ctrl &= ~GPIO_MOD_CTRL_BIT; + __raw_writel(ctrl, reg); } + + bank->mod_usage |= 1 << offset; + spin_unlock_irqrestore(&bank->lock, flags); return 0; @@ -621,22 +618,18 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset) __raw_writel(1 << offset, reg); } #endif - if (!cpu_class_is_omap1()) { - bank->mod_usage &= ~(1 << offset); - if (!bank->mod_usage) { - void __iomem *reg = bank->base; - u32 ctrl; - - if (cpu_is_omap24xx() || cpu_is_omap34xx()) - reg += OMAP24XX_GPIO_CTRL; - else if (cpu_is_omap44xx()) - reg += OMAP4_GPIO_CTRL; - ctrl = __raw_readl(reg); - /* Module is disabled, clocks are gated */ - ctrl |= 1; - __raw_writel(ctrl, reg); - } + bank->mod_usage &= ~(1 << offset); + + if (bank->regs->ctrl && !bank->mod_usage) { + void __iomem *reg = bank->base + bank->regs->ctrl; + u32 ctrl; + + ctrl = __raw_readl(reg); + /* Module is disabled, clocks are gated */ + ctrl |= GPIO_MOD_CTRL_BIT; + __raw_writel(ctrl, reg); } + _reset_gpio(bank, bank->chip.base + offset); spin_unlock_irqrestore(&bank->lock, flags); } |