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davinci: Make GPIO code more generic

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The current gpio code needs to know the number of
gpio irqs there are and what the bank irq number is.
To determine those values, it checks the SoC type.

It also assumes that the base address and the number
of irqs the interrupt controller uses is fixed.

To clean up the SoC checks and make it support
different base addresses and interrupt controllers,
have the SoC-specific code set those values in
the soc_info structure and have the gpio code
reference them there.

Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Mark A. Greer
2009-04-15 12:40:35 -07:00
committed by Kevin Hilman
parent 951d6f6d70
commit a994955cc0
6 changed files with 37 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
arch/arm/mach-davinci/include/mach/gpio.h
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@@ -17,6 +17,7 @@
#include <asm-generic/gpio.h>
#include <mach/irqs.h>
#include <mach/common.h>
#define DAVINCI_GPIO_BASE 0x01C67000
@@ -67,15 +68,16 @@ static inline struct gpio_controller *__iomem
__gpio_to_controller(unsigned gpio)
{
void *__iomem ptr;
void __iomem *base = davinci_soc_info.gpio_base;
if (gpio < 32 * 1)
ptr = IO_ADDRESS(DAVINCI_GPIO_BASE + 0x10);
ptr = base + 0x10;
else if (gpio < 32 * 2)
ptr = IO_ADDRESS(DAVINCI_GPIO_BASE + 0x38);
ptr = base + 0x38;
else if (gpio < 32 * 3)
ptr = IO_ADDRESS(DAVINCI_GPIO_BASE + 0x60);
ptr = base + 0x60;
else if (gpio < 32 * 4)
ptr = IO_ADDRESS(DAVINCI_GPIO_BASE + 0x88);
ptr = base + 0x88;
else
ptr = NULL;
return ptr;
@@ -142,13 +144,13 @@ static inline int gpio_to_irq(unsigned gpio)
{
if (gpio >= DAVINCI_N_GPIO)
return -EINVAL;
return DAVINCI_N_AINTC_IRQ + gpio;
return davinci_soc_info.intc_irq_num + gpio;
}
static inline int irq_to_gpio(unsigned irq)
{
/* caller guarantees gpio_to_irq() succeeded */
return irq - DAVINCI_N_AINTC_IRQ;
return irq - davinci_soc_info.intc_irq_num;
}
#endif /* __DAVINCI_GPIO_H */