1 files changed, 109 insertions, 0 deletions

diff --git a/arch/arm/mach-tegra/board-touch-kai-synaptics-spi.c b/arch/arm/mach-tegra/board-touch-kai-synaptics-spi.c
new file mode 100644
index 00000000000..989cf3339be
--- /dev/null
+++ b/arch/arm/mach-tegra/board-touch-kai-synaptics-spi.c
@@ -0,0 +1,109 @@
+/*
+ * arch/arm/mach-tegra/board-touch-synaptics-spi.c
+ *
+ * Copyright (C) 2010-2012 NVIDIA Corporation
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/spi/spi.h>
+#include <linux/rmi.h>
+#include "board.h"
+#include "board-kai.h"
+
+#define SYNAPTICS_SPI_CS 0
+#define SYNAPTICS_BUTTON_CODES {KEY_HOME, KEY_BACK,}
+
+static unsigned char synaptics_button_codes[] = SYNAPTICS_BUTTON_CODES;
+
+static struct rmi_f19_button_map synaptics_button_map = {
+        .nbuttons = ARRAY_SIZE(synaptics_button_codes),
+        .map = synaptics_button_codes,
+};
+
+static int synaptics_touchpad_gpio_setup(void *gpio_data, bool configure)
+{
+        if (configure) {
+                tegra_gpio_enable(SYNAPTICS_ATTN_GPIO);
+                gpio_request(SYNAPTICS_ATTN_GPIO, "synaptics-irq");
+                gpio_direction_input(SYNAPTICS_ATTN_GPIO);
+
+                tegra_gpio_enable(SYNAPTICS_RESET_GPIO);
+                gpio_request(SYNAPTICS_RESET_GPIO, "synaptics-reset");
+                gpio_direction_output(SYNAPTICS_RESET_GPIO, 0);
+
+                msleep(1);
+                gpio_set_value(SYNAPTICS_RESET_GPIO, 1);
+                msleep(100);
+        } else {
+                gpio_free(SYNAPTICS_ATTN_GPIO);
+                gpio_free(SYNAPTICS_RESET_GPIO);
+                tegra_gpio_disable(SYNAPTICS_ATTN_GPIO);
+                tegra_gpio_disable(SYNAPTICS_RESET_GPIO);
+        }
+        return 0;
+}
+
+static struct rmi_device_platform_data synaptics_platformdata = {
+        .driver_name = "rmi_generic",
+        .irq = SYNAPTICS_ATTN_GPIO,
+        .irq_polarity = RMI_IRQ_ACTIVE_LOW,
+        .gpio_config = synaptics_touchpad_gpio_setup,
+        .spi_data = {
+                .block_delay_us = 15,
+                .read_delay_us = 15,
+                .write_delay_us = 2,
+        },
+        .axis_align = {
+                .flip_y = true,
+        },
+        .button_map = &synaptics_button_map,
+};
+
+struct spi_board_info synaptics_2002_spi_board[] = {
+        {
+                .modalias = "rmi_spi",
+                .bus_num = 0,
+                .chip_select = 0,
+                .irq = 999,  /* just to make sure this one is not being used */
+                .max_speed_hz = 1*1000*1000,
+                .mode = SPI_MODE_3,
+                .platform_data = &synaptics_platformdata,
+        },
+};
+
+int __init touch_init_synaptics_kai(void)
+{
+        pr_info("%s: registering synaptics_2002_spi_board\n", __func__);
+        pr_info("               modalias     = %s\n",
+                                        synaptics_2002_spi_board->modalias);
+        pr_info("               bus_num      = %d\n",
+                                        synaptics_2002_spi_board->bus_num);
+        pr_info("               chip_select  = %d\n",
+                                        synaptics_2002_spi_board->chip_select);
+        pr_info("               irq          = %d\n",
+                                        synaptics_2002_spi_board->irq);
+        pr_info("               max_speed_hz = %d\n",
+                                        synaptics_2002_spi_board->max_speed_hz);
+        pr_info("               mode         = %d\n",
+                                        synaptics_2002_spi_board->mode);
+
+        msleep(100);
+        spi_register_board_info(synaptics_2002_spi_board,
+                                        ARRAY_SIZE(synaptics_2002_spi_board));
+        return 0;
+}