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authorAlan Carvalho de Assis <acassis@gmail.com>2009-11-27 14:09:54 -0200
committerSascha Hauer <s.hauer@pengutronix.de>2009-12-02 12:06:14 +0100
commit9e3e7afe9bd73cc3fe0d742ba3391e864e234923 (patch)
tree4e944d3f94fcc17c50c48f7d02a8d0bd5c595cf2 /arch/arm/mach-mx2
parent9c2daf15ac5aba3c7897540c3b606e54550d9c8f (diff)
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>
Diffstat (limited to 'arch/arm/mach-mx2')
-rw-r--r--arch/arm/mach-mx2/mxt_td60.c39
1 files changed, 37 insertions, 2 deletions
diff --git a/arch/arm/mach-mx2/mxt_td60.c b/arch/arm/mach-mx2/mxt_td60.c
index dd251f578e2..03dbbdc9895 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 = {