[PATCH] mx27: mxt_td60: Add support to SD/MMC
Alan Carvalho de Assis
acassis at gmail.com
Fri Nov 27 11:09:54 EST 2009
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 at gmail.com>
---
arch/arm/mach-mx2/mxt_td60.c | 39 ++++++++++++++++++++++++++++++-
arch/arm/plat-mxc/include/mach/iomux.h | 1 +
2 files changed, 38 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-mx2/mxt_td60.c b/arch/arm/mach-mx2/mxt_td60.c
index dd251f5..03dbbdc 100644
--- a/arch/arm/mach-mx2/mxt_td60.c
+++ b/arch/arm/mach-mx2/mxt_td60.c
@@ -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 = {
diff --git a/arch/arm/plat-mxc/include/mach/iomux.h b/arch/arm/plat-mxc/include/mach/iomux.h
index 6d49f8a..011cfcd 100644
--- a/arch/arm/plat-mxc/include/mach/iomux.h
+++ b/arch/arm/plat-mxc/include/mach/iomux.h
@@ -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);
--
1.6.0.4
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