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mx27: mxt_td60: Add support to SD/MMC 

This patch configures iomux and i2c io expander in order to add
support to SD/MMC cards on i-MXT TD60.

Signed-off-by: Alan Carvalho de Assis <acassis@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Alan Carvalho de Assis 2009-11-27 14:09:54 -02:00 committed by Sascha Hauer
parent 9c2daf15ac
commit 9e3e7afe9b
2 changed files with 38 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
arch/arm/mach-mx2/mxt_td60.c
View File

@ -36,6 +36,7 @@
#include <mach/iomux.h>
#include <mach/mxc_nand.h>
#include <mach/i2c.h>
#include <linux/i2c/pca953x.h>
#include <mach/imxfb.h>
#include <mach/mmc.h>
@ -132,6 +133,7 @@ static unsigned int mxt_td60_pins[] __initdata = {
PE21_PF_SD1_D3,
PE22_PF_SD1_CMD,
PE23_PF_SD1_CLK,
PF8_AF_ATA_IORDY,
/* SDHC2*/
PB4_PF_SD2_D0,
PB5_PF_SD2_D1,
@ -150,7 +152,40 @@ static struct imxi2c_platform_data mxt_td60_i2c_data = {
.bitrate = 100000,
};
/* PCA9557 */
static int mxt_td60_pca9557_setup(struct i2c_client *client,
unsigned gpio_base, unsigned ngpio,
void *context)
{
static int mxt_td60_gpio_value[] = {
-1, -1, -1, -1, -1, -1, -1, 1
};
int n;
for (n = 0; n < ARRAY_SIZE(mxt_td60_gpio_value); ++n) {
gpio_request(gpio_base + n, "MXT_TD60 GPIO Exp");
if (mxt_td60_gpio_value[n] < 0)
gpio_direction_input(gpio_base + n);
else
gpio_direction_output(gpio_base + n,
mxt_td60_gpio_value[n]);
gpio_export(gpio_base + n, 0);
}
return 0;
}
static struct pca953x_platform_data mxt_td60_pca9557_pdata = {
.gpio_base = 240, /* place PCA9557 after all MX27 gpio pins */
.invert = 0, /* Do not invert */
.setup = mxt_td60_pca9557_setup,
};
static struct i2c_board_info mxt_td60_i2c_devices[] = {
{
I2C_BOARD_INFO("pca9557", 0x18),
.platform_data = &mxt_td60_pca9557_pdata,
},
};
static struct imxi2c_platform_data mxt_td60_i2c2_data = {
@ -201,13 +236,13 @@ static struct imx_fb_platform_data mxt_td60_fb_data = {
static int mxt_td60_sdhc1_init(struct device *dev, irq_handler_t detect_irq,
void *data)
{
return request_irq(IRQ_GPIOE(21), detect_irq, IRQF_TRIGGER_RISING,
return request_irq(IRQ_GPIOF(8), detect_irq, IRQF_TRIGGER_FALLING,
"sdhc1-card-detect", data);
}
static void mxt_td60_sdhc1_exit(struct device *dev, void *data)
{
free_irq(IRQ_GPIOE(21), data);
free_irq(IRQ_GPIOF(8), data);
}
static struct imxmmc_platform_data sdhc1_pdata = {

1
arch/arm/plat-mxc/include/mach/iomux.h
View File

@ -123,6 +123,7 @@
#define IRQ_GPIOC(x) (IRQ_GPIOB(32) + x)
#define IRQ_GPIOD(x) (IRQ_GPIOC(32) + x)
#define IRQ_GPIOE(x) (IRQ_GPIOD(32) + x)
#define IRQ_GPIOF(x) (IRQ_GPIOE(32) + x)
extern void mxc_gpio_mode(int gpio_mode);