ARM: mx53_loco: Add support for the accelerometer

mx53_loco has a MMA8450 accelerometer connected to i2c0.

Add support for it.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

diff --git a/arch/arm/mach-mx5/board-mx53_loco.c b/arch/arm/mach-mx5/board-mx53_loco.c
index 4e1d51d..1bb0b3c 100644 (file)
--- a/arch/arm/mach-mx5/board-mx53_loco.c
+++ b/arch/arm/mach-mx5/board-mx53_loco.c
@@ -22,6 +22,7 @@
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/gpio.h>
+#include <linux/i2c.h>
 
 #include <mach/common.h>
 #include <mach/hardware.h>
@@ -42,6 +43,7 @@
 #define LOCO_SD3_CD                    IMX_GPIO_NR(3, 11)
 #define LOCO_SD3_WP                    IMX_GPIO_NR(3, 12)
 #define LOCO_SD1_CD                    IMX_GPIO_NR(3, 13)
+#define LOCO_ACCEL_EN                  IMX_GPIO_NR(6, 14)
 
 static iomux_v3_cfg_t mx53_loco_pads[] = {
        /* FEC */
@@ -64,6 +66,10 @@ static iomux_v3_cfg_t mx53_loco_pads[] = {
        MX53_PAD_KEY_ROW0__AUDMUX_AUD5_TXD,
        MX53_PAD_KEY_COL1__AUDMUX_AUD5_TXFS,
        MX53_PAD_KEY_ROW1__AUDMUX_AUD5_RXD,
+       /* I2C1 */
+       MX53_PAD_CSI0_DAT8__I2C1_SDA,
+       MX53_PAD_CSI0_DAT9__I2C1_SCL,
+       MX53_PAD_NANDF_CS1__GPIO6_14,   /* Accelerometer Enable */
        /* I2C2 */
        MX53_PAD_KEY_COL3__I2C2_SCL,
        MX53_PAD_KEY_ROW3__I2C2_SDA,
@@ -257,8 +263,15 @@ static const struct gpio_led_platform_data mx53loco_leds_data __initconst = {
        .num_leds       = ARRAY_SIZE(mx53loco_leds),
 };
 
+static struct i2c_board_info mx53loco_i2c_devices[] = {
+       {
+               I2C_BOARD_INFO("mma8450", 0x1C),
+       },
+};
+
 static void __init mx53_loco_board_init(void)
 {
+       int ret;
        imx53_soc_init();
 
        mxc_iomux_v3_setup_multiple_pads(mx53_loco_pads,
@@ -267,6 +280,13 @@ static void __init mx53_loco_board_init(void)
        mx53_loco_fec_reset();
        imx53_add_fec(&mx53_loco_fec_data);
        imx53_add_imx2_wdt(0, NULL);
+
+       ret = gpio_request_one(LOCO_ACCEL_EN, GPIOF_OUT_INIT_HIGH, "accel_en");
+       if (ret)
+               pr_err("Cannot request ACCEL_EN pin: %d\n", ret);
+
+       i2c_register_board_info(0, mx53loco_i2c_devices,
+                               ARRAY_SIZE(mx53loco_i2c_devices));
        imx53_add_imx_i2c(0, &mx53_loco_i2c_data);
        imx53_add_imx_i2c(1, &mx53_loco_i2c_data);
        imx53_add_sdhci_esdhc_imx(0, &mx53_loco_sd1_data);