arm: tegra: kai: Synaptics DirectTouch

Board file for Synaptics SPI touch connection which is
used for DirectTouch initialization

Bug 912775

Reviewed-on: http://git-master/r/74643

Change-Id: Ie296ddff5b9e1fbf9296d40fde2877598a13207e
Signed-off-by: Peter Zu <pzu@nvidia.com>
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Reviewed-on: http://git-master/r/77775
Reviewed-by: Automatic_Commit_Validation_User

1 files changed, 103 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 000000000000..b4052c277c3a
--- /dev/null
+++ b/arch/arm/mach-tegra/board-touch-kai-synaptics-spi.c
@@ -0,0 +1,103 @@
+/*
+ * arch/arm/mach-tegra/board-touch-synaptics-spi.c
+ *
+ * Copyright (C) 2010-2011 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)
+{
+	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);
+
+	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;
+}