Commit e2bb6650 authored by Eric Miao's avatar Eric Miao
Browse files

[ARM] pxa: add GPIO support for pxa168 



Signed-off-by: default avatarEric Miao <eric.miao@marvell.com>
parent 40305a58

arch/arm/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -490,6 +490,8 @@ config ARCH_PXA 
config ARCH_MMP

	bool "Marvell PXA168"

	depends on MMU

	select GENERIC_GPIO

	select ARCH_REQUIRE_GPIOLIB

	select HAVE_CLK

	select COMMON_CLKDEV

	select GENERIC_TIME

arch/arm/mach-mmp/include/mach/gpio.h

0 → 100644
+36 −0
Original line number Diff line number Diff line 
#ifndef __ASM_MACH_GPIO_H

#define __ASM_MACH_GPIO_H



#include <mach/addr-map.h>

#include <mach/irqs.h>

#include <asm-generic/gpio.h>



#define GPIO_REGS_VIRT	(APB_VIRT_BASE + 0x19000)



#define BANK_OFF(n)	(((n) < 3) ? (n) << 2 : 0x100 + (((n) - 3) << 2))

#define GPIO_REG(x)	(*((volatile u32 *)(GPIO_REGS_VIRT + (x))))



#define NR_BUILTIN_GPIO	(128)



#define gpio_to_bank(gpio)	((gpio) >> 5)

#define gpio_to_irq(gpio)	(IRQ_GPIO_START + (gpio))

#define irq_to_gpio(irq)	((irq) - IRQ_GPIO_START)





#define __gpio_is_inverted(gpio)	(0)

#define __gpio_is_occupied(gpio)	(0)



/* NOTE: these macros are defined here to make optimization of

 * gpio_{get,set}_value() to work when 'gpio' is a constant.

 * Usage of these macros otherwise is no longer recommended,

 * use generic GPIO API whenever possible.

 */

#define GPIO_bit(gpio)	(1 << ((gpio) & 0x1f))



#define GPLR(x)		GPIO_REG(BANK_OFF(gpio_to_bank(x)) + 0x00)

#define GPDR(x)		GPIO_REG(BANK_OFF(gpio_to_bank(x)) + 0x0c)

#define GPSR(x)		GPIO_REG(BANK_OFF(gpio_to_bank(x)) + 0x18)

#define GPCR(x)		GPIO_REG(BANK_OFF(gpio_to_bank(x)) + 0x24)



#include <plat/gpio.h>

#endif /* __ASM_MACH_GPIO_H */

arch/arm/mach-mmp/pxa168.c

+19 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/list.h>

#include <linux/io.h>

#include <linux/clk.h>



#include <asm/mach/time.h>
@@ -19,15 +20,33 @@ 
#include <mach/cputype.h>

#include <mach/regs-apbc.h>

#include <mach/irqs.h>

#include <mach/gpio.h>

#include <mach/dma.h>

#include <mach/devices.h>



#include "common.h"

#include "clock.h"



#define APMASK(i)	(GPIO_REGS_VIRT + BANK_OFF(i) + 0x09c)



static void __init pxa168_init_gpio(void)

{

	int i;



	/* enable GPIO clock */

	__raw_writel(APBC_APBCLK | APBC_FNCLK, APBC_PXA168_GPIO);



	/* unmask GPIO edge detection for all 4 banks - APMASKx */

	for (i = 0; i < 4; i++)

		__raw_writel(0xffffffff, APMASK(i));



	pxa_init_gpio(IRQ_PXA168_GPIOX, 0, 127, NULL);

}



void __init pxa168_init_irq(void)

{

	icu_init_irq();

	pxa168_init_gpio();

}



/* APB peripheral clocks */