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authorCyril Chemparathy <cyril@ti.com>2010-05-18 20:51:20 +0400
committerKevin Hilman <khilman@deeprootsystems.com>2010-06-21 23:48:31 +0400
commitd92c7962470b699ef7a697524b9a679846e9e15b (patch)
treebb0045e061b4905a965b799d6a9139f1e2b1bd39 /arch/arm/mach-davinci/include
parent4d1e78480cc5b5937c9384e47a0b2b0cdf117da4 (diff)
downloadlinux-d92c7962470b699ef7a697524b9a679846e9e15b.tar.xz
Davinci: tnetv107x initial gpio support
This patch adds support for the tnetv107x gpio controller. Key differences between davinci and tnetv107x controllers: - register map - davinci's controller is organized into banks of 32 gpios, tnetv107x has a single space with arrays of registers for in, out, direction, etc. - davinci's controller has separate set/clear registers for output, tnetv107x has a single direct mapped register. This patch does not yet add gpio irq support on this controller. Signed-off-by: Cyril Chemparathy <cyril@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-davinci/include')
-rw-r--r--arch/arm/mach-davinci/include/mach/gpio.h22
1 files changed, 15 insertions, 7 deletions
diff --git a/arch/arm/mach-davinci/include/mach/gpio.h b/arch/arm/mach-davinci/include/mach/gpio.h
index 504cc180a60b..fbece126c2bf 100644
--- a/arch/arm/mach-davinci/include/mach/gpio.h
+++ b/arch/arm/mach-davinci/include/mach/gpio.h
@@ -25,6 +25,7 @@
enum davinci_gpio_type {
GPIO_TYPE_DAVINCI = 0,
+ GPIO_TYPE_TNETV107X,
};
/*
@@ -87,9 +88,13 @@ static inline u32 __gpio_mask(unsigned gpio)
return 1 << (gpio % 32);
}
-/* The get/set/clear functions will inline when called with constant
+/*
+ * The get/set/clear functions will inline when called with constant
* parameters referencing built-in GPIOs, for low-overhead bitbanging.
*
+ * gpio_set_value() will inline only on traditional Davinci style controllers
+ * with distinct set/clear registers.
+ *
* Otherwise, calls with variable parameters or referencing external
* GPIOs (e.g. on GPIO expander chips) use outlined functions.
*/
@@ -100,12 +105,15 @@ static inline void gpio_set_value(unsigned gpio, int value)
u32 mask;
ctlr = __gpio_to_controller(gpio);
- mask = __gpio_mask(gpio);
- if (value)
- __raw_writel(mask, ctlr->set_data);
- else
- __raw_writel(mask, ctlr->clr_data);
- return;
+
+ if (ctlr->set_data != ctlr->clr_data) {
+ mask = __gpio_mask(gpio);
+ if (value)
+ __raw_writel(mask, ctlr->set_data);
+ else
+ __raw_writel(mask, ctlr->clr_data);
+ return;
+ }
}
__gpio_set_value(gpio, value);