Commit 9e3e7afe authored by Alan Carvalho de Assis's avatar Alan Carvalho de Assis Committed by Sascha Hauer
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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: default avatarAlan Carvalho de Assis <acassis@gmail.com>
Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
parent 9c2daf15

arch/arm/mach-mx2/mxt_td60.c

+37 −2
Original line number Diff line number Diff line
@@ -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 = {

arch/arm/plat-mxc/include/mach/iomux.h

+1 −0
Original line number Diff line number Diff line
@@ -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);