From: Bill Varney <[email protected]>
Signed-off-by: Ken Lierman <[email protected]>
---
arch/x86/kernel/mrst.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 64 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/mrst.c b/arch/x86/kernel/mrst.c
index 2c2f662..58df1b6 100644
--- a/arch/x86/kernel/mrst.c
+++ b/arch/x86/kernel/mrst.c
@@ -37,6 +37,7 @@
#include <linux/bh1770glc.h>
#include <linux/leds-lp5523.h>
#include <linux/pn544.h>
+#include <linux/atmel_maxtouch.h>
#include <asm/setup.h>
#include <asm/mpspec_def.h>
@@ -803,6 +804,68 @@ void *bh1770glc_platform_data_init(void *info)
return &prox_pdata;
}
+static int mxt_reset_gpio;
+
+static u8 mxt_valid_interrupt(void)
+{
+ return 1;
+}
+
+static void mxt_init_platform_hw(void)
+{
+ int err;
+
+ err = gpio_request(mxt_reset_gpio, "MaxTouch-reset");
+ if (err < 0)
+ printk(KERN_ERR "Failed to request GPIO%d (MaxTouch-reset)
err=%d\n",
+ mxt_reset_gpio, err);
+
+ err = gpio_direction_output(mxt_reset_gpio, 0);
+ if (err)
+ printk(KERN_ERR "Failed to change direction, err=%d\n", err);
+
+ /* maXTouch wants 40mSec minimum after reset to get organized */
+ gpio_set_value(mxt_reset_gpio, 1);
+ msleep(40);
+}
+
+static void mxt_exit_platform_hw(void)
+{
+ printk(KERN_INFO "In %s.", __func__);
+ gpio_set_value(mxt_reset_gpio, 0);
+}
+
+static void *mxt_platform_data(void *info)
+{
+ struct i2c_board_info *i2c_info = (struct i2c_board_info *) info;
+ static struct mxt_platform_data mfld_mxt_platform_data;
+ int intr = 0;
+
+ printk(KERN_INFO "In %s.", __func__);
+
+ memset(&mfld_mxt_platform_data, 0x00,
+ sizeof(struct mxt_platform_data));
+ mfld_mxt_platform_data.numtouch = 10;
+ mfld_mxt_platform_data.init_platform_hw = &mxt_init_platform_hw;
+ mfld_mxt_platform_data.exit_platform_hw = &mxt_exit_platform_hw;
+ mfld_mxt_platform_data.max_x = 480;
+ mfld_mxt_platform_data.max_y = 864;
+ mfld_mxt_platform_data.valid_interrupt = &mxt_valid_interrupt;
+
+ intr = get_gpio_by_name("TS0-intr");
+ if (intr == -1) {
+ printk(KERN_ERR "Missing GPIO(s) for MXT.\n");
+ return NULL;
+ }
+
+ /* On nCDK EB2.0, Atmel max touch reset is on
+ GP_CORE_033 = 33 + 96 = 129 */
+ mxt_reset_gpio = 129; /* TODO: Use SFI, when SFI is available */
+
+ i2c_info->irq = intr + MRST_IRQ_OFFSET;
+ return &mfld_mxt_platform_data;
+}
+
#ifdef CONFIG_BCM4751_GPS
/*
@@ -1387,6 +1450,7 @@ static const struct devs_id device_ids[] = {
{"pmic_audio", SFI_DEV_TYPE_IPC, 1, &no_platform_data},
{"msic_audio", SFI_DEV_TYPE_SPI, 1, &no_platform_data},
{"msic_audio", SFI_DEV_TYPE_IPC, 1, &no_platform_data},
+ {"mXT224", SFI_DEV_TYPE_I2C, 0, &mxt_platform_data},
{"i2c_TC35894-nEB1", SFI_DEV_TYPE_I2C, 0, &tc35894xbg_n_platform_data},
{"i2c_TC35894-i", SFI_DEV_TYPE_I2C, 0, &tc35894xbg_i_platform_data},
{"bh1770glc", SFI_DEV_TYPE_I2C, 0, &bh1770glc_platform_data_init},
--
1.7.1
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