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[ARM] pxa/balloon3: PCF857x GPIO expander and LEDs 

Add supported for PCF8574A GPIO expander and LEDs attached to it.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
This commit is contained in:
Marek Vasut 2010-07-27 23:11:03 +02:00 committed by Eric Miao
parent a9c0629cde
commit 02a453e4a5
2 changed files with 92 additions and 3 deletions
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84
arch/arm/mach-pxa/balloon3.c
View File

@ -26,6 +26,7 @@
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/types.h>
#include <linux/i2c/pcf857x.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
@ -375,15 +376,65 @@ static struct gpio_led_platform_data balloon3_gpio_led_info = {
static struct platform_device balloon3_leds = {
.name = "leds-gpio",
.id = -1,
.id = 0,
.dev = {
.platform_data = &balloon3_gpio_led_info,
}
};
struct gpio_led balloon3_pcf_gpio_leds[] = {
{
.name = "balloon3:green:led0",
.gpio = BALLOON3_PCF_GPIO_LED0,
.active_low = 1,
}, {
.name = "balloon3:green:led1",
.gpio = BALLOON3_PCF_GPIO_LED1,
.active_low = 1,
}, {
.name = "balloon3:orange:led2",
.gpio = BALLOON3_PCF_GPIO_LED2,
.active_low = 1,
}, {
.name = "balloon3:orange:led3",
.gpio = BALLOON3_PCF_GPIO_LED3,
.active_low = 1,
}, {
.name = "balloon3:orange:led4",
.gpio = BALLOON3_PCF_GPIO_LED4,
.active_low = 1,
}, {
.name = "balloon3:orange:led5",
.gpio = BALLOON3_PCF_GPIO_LED5,
.active_low = 1,
}, {
.name = "balloon3:red:led6",
.gpio = BALLOON3_PCF_GPIO_LED6,
.active_low = 1,
}, {
.name = "balloon3:red:led7",
.gpio = BALLOON3_PCF_GPIO_LED7,
.active_low = 1,
},
};
static struct gpio_led_platform_data balloon3_pcf_gpio_led_info = {
.leds = balloon3_pcf_gpio_leds,
.num_leds = ARRAY_SIZE(balloon3_pcf_gpio_leds),
};
static struct platform_device balloon3_pcf_leds = {
.name = "leds-gpio",
.id = 1,
.dev = {
.platform_data = &balloon3_pcf_gpio_led_info,
}
};
static void __init balloon3_leds_init(void)
{
platform_device_register(&balloon3_leds);
platform_device_register(&balloon3_pcf_leds);
}
#else
static inline void balloon3_leds_init(void) {}
@ -450,6 +501,34 @@ static void __init balloon3_init_irq(void)
"enabled\n", __func__, BALLOON3_AUX_NIRQ);
}
/******************************************************************************
* GPIO expander
******************************************************************************/
#if defined(CONFIG_GPIO_PCF857X) || defined(CONFIG_GPIO_PCF857X_MODULE)
static struct pcf857x_platform_data balloon3_pcf857x_pdata = {
.gpio_base = BALLOON3_PCF_GPIO_BASE,
.n_latch = 0,
.setup = NULL,
.teardown = NULL,
.context = NULL,
};
static struct i2c_board_info __initdata balloon3_i2c_devs[] = {
{
I2C_BOARD_INFO("pcf8574a", 0x38),
.platform_data = &balloon3_pcf857x_pdata,
},
};
static void __init balloon3_i2c_init(void)
{
pxa_set_i2c_info(NULL);
i2c_register_board_info(0, ARRAY_AND_SIZE(balloon3_i2c_devs));
}
#else
static inline void balloon3_i2c_init(void) {}
#endif
/******************************************************************************
* Machine init
******************************************************************************/
@ -463,8 +542,7 @@ static void __init balloon3_init(void)
pxa_set_btuart_info(NULL);
pxa_set_stuart_info(NULL);
pxa_set_i2c_info(NULL);
balloon3_i2c_init();
balloon3_irda_init();
balloon3_lcd_init();
balloon3_leds_init();

11
arch/arm/mach-pxa/include/mach/balloon3.h
View File

@ -69,6 +69,17 @@ enum balloon3_features {
#define BALLOON3_GPIO_S0_CD (105)
/* PCF8574A Leds */
#define BALLOON3_PCF_GPIO_BASE 160
#define BALLOON3_PCF_GPIO_LED0 (BALLOON3_PCF_GPIO_BASE + 0)
#define BALLOON3_PCF_GPIO_LED1 (BALLOON3_PCF_GPIO_BASE + 1)
#define BALLOON3_PCF_GPIO_LED2 (BALLOON3_PCF_GPIO_BASE + 2)
#define BALLOON3_PCF_GPIO_LED3 (BALLOON3_PCF_GPIO_BASE + 3)
#define BALLOON3_PCF_GPIO_LED4 (BALLOON3_PCF_GPIO_BASE + 4)
#define BALLOON3_PCF_GPIO_LED5 (BALLOON3_PCF_GPIO_BASE + 5)
#define BALLOON3_PCF_GPIO_LED6 (BALLOON3_PCF_GPIO_BASE + 6)
#define BALLOON3_PCF_GPIO_LED7 (BALLOON3_PCF_GPIO_BASE + 7)
/* FPGA Interrupt Mask/Acknowledge Register */
#define BALLOON3_INT_S0_IRQ (1 << 0) /* PCMCIA 0 IRQ */
#define BALLOON3_INT_S0_STSCHG (1 << 1) /* PCMCIA 0 status changed */