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[ARM] pxa: add GPIO expander (PCA9539) support for zylonite 

And also reserve 32 IRQs for the two GPIO expanders.

Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Eric Miao 2008-05-28 10:44:16 +08:00 committed by Russell King
parent 9c1db1a133
commit a1f7fc48c1
2 changed files with 44 additions and 0 deletions
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42
arch/arm/mach-pxa/zylonite_pxa300.c
View File

@ -16,9 +16,12 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/i2c/pca953x.h>
#include <asm/gpio.h>
#include <asm/arch/mfp-pxa300.h>
#include <asm/arch/i2c.h>
#include <asm/arch/zylonite.h>
#include "generic.h"
@ -109,6 +112,10 @@ static mfp_cfg_t common_mfp_cfg[] __initdata = {
GPIO12_MMC2_DAT3,
GPIO13_MMC2_CLK,
GPIO14_MMC2_CMD,
/* Standard I2C */
GPIO21_I2C_SCL,
GPIO22_I2C_SDA,
};
static mfp_cfg_t pxa300_mfp_cfg[] __initdata = {
@ -192,6 +199,39 @@ static void __init zylonite_detect_lcd_panel(void)
pxa3xx_mfp_write(lcd_detect_pins[i], mfpr_save[i]);
}
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static struct pca953x_platform_data gpio_exp[] = {
[0] = {
.gpio_base = 128,
},
[1] = {
.gpio_base = 144,
},
};
struct i2c_board_info zylonite_i2c_board_info[] = {
{
.type = "pca9539",
.addr = 0x74,
.platform_data = &gpio_exp[0],
.irq = IRQ_GPIO(18),
}, {
.type = "pca9539",
.addr = 0x75,
.platform_data = &gpio_exp[1],
.irq = IRQ_GPIO(19),
},
};
static void __init zylonite_init_i2c(void)
{
pxa_set_i2c_info(NULL);
i2c_register_board_info(0, ARRAY_AND_SIZE(zylonite_i2c_board_info));
}
#else
static inline void zylonite_init_i2c(void) {}
#endif
void __init zylonite_pxa300_init(void)
{
if (cpu_is_pxa300() || cpu_is_pxa310()) {
@ -207,6 +247,8 @@ void __init zylonite_pxa300_init(void)
/* WM9713 IRQ */
wm9713_irq = mfp_to_gpio(MFP_PIN_GPIO26);
zylonite_init_i2c();
}
if (cpu_is_pxa300()) {

2
include/asm-arm/arch-pxa/irqs.h
View File

@ -184,6 +184,8 @@
defined(CONFIG_MACH_PCM027) || \
defined(CONFIG_MACH_MAGICIAN)
#define NR_IRQS (IRQ_BOARD_END)
#elif defined(CONFIG_MACH_ZYLONITE)
#define NR_IRQS (IRQ_BOARD_START + 32)
#else
#define NR_IRQS (IRQ_BOARD_START)
#endif