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pcm037: add SDHC card detection 

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2009-03-10 11:56:10 +01:00
parent 01ac7d584d
commit dddd4a493d
1 changed files with 30 additions and 3 deletions
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33
arch/arm/mach-mx3/pcm037.c
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@ -28,6 +28,9 @@
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/i2c/at24.h>
#include <linux/delay.h>
#include <linux/spi/spi.h>
#include <linux/irq.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
@ -218,17 +221,41 @@ static struct i2c_board_info pcm037_i2c_devices[] = {
};
#endif
static int pcm970_sdhc1_init(struct device *dev, irq_handler_t h, void *data)
/* Not connected by default */
#ifdef PCM970_SDHC_RW_SWITCH
static int pcm970_sdhc1_get_ro(struct device *dev)
{
return 0;
return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_SFS6));
}
#endif
static int pcm970_sdhc1_init(struct device *dev, irq_handler_t detect_irq,
void *data)
{
int ret;
int gpio_det, gpio_wp;
gpio_det = IOMUX_TO_GPIO(MX31_PIN_SCK6);
gpio_wp = IOMUX_TO_GPIO(MX31_PIN_SFS6);
gpio_direction_input(gpio_det);
gpio_direction_input(gpio_wp);
ret = request_irq(IOMUX_TO_IRQ(MX31_PIN_SCK6), detect_irq,
IRQF_DISABLED | IRQF_TRIGGER_FALLING,
"sdhc-detect", data);
return ret;
}
static void pcm970_sdhc1_exit(struct device *dev, void *data)
{
free_irq(IOMUX_TO_IRQ(MX31_PIN_SCK6), data);
}
/* No card and rw detection at the moment */
static struct imxmmc_platform_data sdhc_pdata = {
#ifdef PCM970_SDHC_RW_SWITCH
.get_ro = pcm970_sdhc1_get_ro,
#endif
.init = pcm970_sdhc1_init,
.exit = pcm970_sdhc1_exit,
};