[PATCH 7/7] arm/imx: add mc13892 I2C based touch panel support for

Oskar Schirmer
2012-02-14T11:03:55Z

MX35_3DS development board comes with optional touch screen
driven by I2C wired mc13892. Set up platform specific declarations.

Signed-off-by: Oskar Schirmer <oskar@scara.com>
---
arch/arm/mach-imx/mach-mx35_3ds.c | 27 +++++++++++++++++++++++++++
1 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-imx/mach-mx35_3ds.c b/arch/arm/mach-imx/mach-mx35_3ds.c
index 0af6c9c..c65b815 100644
--- a/arch/arm/mach-imx/mach-mx35_3ds.c
+++ b/arch/arm/mach-imx/mach-mx35_3ds.c
@@ -41,9 +41,13 @@
#include <mach/irqs.h>
#include <mach/3ds_debugboard.h>

+#include <linux/i2c.h>
+#include <linux/mfd/mc13xxx.h>
+
#include "devices-imx35.h"

#define EXPIO_PARENT_INT gpio_to_irq(IMX_GPIO_NR(1, 1))
+#define GPIO_PMIC_INT IMX_GPIO_NR(2, 0)

static const struct imxuart_platform_data uart_pdata __initconst = {
.flags = IMXUART_HAVE_RTSCTS,
@@ -117,6 +121,8 @@ static iomux_v3_cfg_t mx35pdk_pads[] = {
MX35_PAD_SD1_DATA1__ESDHC1_DAT1,
MX35_PAD_SD1_DATA2__ESDHC1_DAT2,
MX35_PAD_SD1_DATA3__ESDHC1_DAT3,
+ /* PMIC */
+ MX35_PAD_GPIO2_0__GPIO2_0,
/* I2C1 */
MX35_PAD_I2C1_CLK__I2C1_SCL,
MX35_PAD_I2C1_DAT__I2C1_SDA,
@@ -174,6 +180,18 @@ static const struct imxi2c_platform_data mx35_3ds_i2c0_data __initconst = {
.bitrate = 100000,
};

+static struct mc13xxx_platform_data mx35_3ds_pmic = {
+ .flags = MC13XXX_USE_TOUCHSCREEN,
+};
+
+static struct i2c_board_info mx35_3ds_i2c_devices[] = {
+ {
+ I2C_BOARD_INFO("mc13892", 0x08),
+ .platform_data = &mx35_3ds_pmic,
+ .irq = IMX_GPIO_TO_IRQ(GPIO_PMIC_INT),
+ }
+};
+
/*
* Board specific initialization.
*/
@@ -187,6 +205,12 @@ static void __init mx35_3ds_init(void)
imx35_add_imx2_wdt(NULL);
platform_add_devices(devices, ARRAY_SIZE(devices));

+ if (0 != gpio_request(GPIO_PMIC_INT, "PMIC_INT"))
+ printk(KERN_WARNING "PMIC_INT: Couldn't get gpio (%d)\n",
+ GPIO_PMIC_INT);
+ else
+ gpio_direction_input(GPIO_PMIC_INT);
+
imx35_add_imx_uart0(&uart_pdata);

if (otg_mode_host)
@@ -203,6 +227,9 @@ static void __init mx35_3ds_init(void)
if (mxc_expio_init(MX35_CS5_BASE_ADDR, EXPIO_PARENT_INT))
pr_warn("Init of the debugboard failed, all "
"devices on the debugboard are unusable.\n");
+
+ i2c_register_board_info(0, mx35_3ds_i2c_devices,
+ ARRAY_SIZE(mx35_3ds_i2c_devices));
imx35_add_imx_i2c0(&mx35_3ds_i2c0_data);
}

--
1.7.5.4