Initial import

1 files changed, 103 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/common-board-devices.c b/arch/arm/mach-omap2/common-board-devices.c
new file mode 100644
index 000000000..d246efd9f
--- /dev/null
+++ b/arch/arm/mach-omap2/common-board-devices.c
@@ -0,0 +1,103 @@
+/*
+ * common-board-devices.c
+ *
+ * Copyright (C) 2011 CompuLab, Ltd.
+ * Author: Mike Rapoport <mike@compulab.co.il>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/gpio.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/ads7846.h>
+
+#include <linux/platform_data/spi-omap2-mcspi.h>
+
+#include "common.h"
+#include "common-board-devices.h"
+
+#if defined(CONFIG_TOUCHSCREEN_ADS7846) || \
+	defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
+static struct omap2_mcspi_device_config ads7846_mcspi_config = {
+	.turbo_mode	= 0,
+};
+
+static struct ads7846_platform_data ads7846_config = {
+	.x_max			= 0x0fff,
+	.y_max			= 0x0fff,
+	.x_plate_ohms		= 180,
+	.pressure_max		= 255,
+	.debounce_max		= 10,
+	.debounce_tol		= 3,
+	.debounce_rep		= 1,
+	.gpio_pendown		= -EINVAL,
+	.keep_vref_on		= 1,
+};
+
+static struct spi_board_info ads7846_spi_board_info __initdata = {
+	.modalias		= "ads7846",
+	.bus_num		= -EINVAL,
+	.chip_select		= 0,
+	.max_speed_hz		= 1500000,
+	.controller_data	= &ads7846_mcspi_config,
+	.irq			= -EINVAL,
+	.platform_data		= &ads7846_config,
+};
+
+void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
+			      struct ads7846_platform_data *board_pdata)
+{
+	struct spi_board_info *spi_bi = &ads7846_spi_board_info;
+	int err;
+
+	/*
+	 * If a board defines get_pendown_state() function, request the pendown
+	 * GPIO and set the GPIO debounce time.
+	 * If a board does not define the get_pendown_state() function, then
+	 * the ads7846 driver will setup the pendown GPIO itself.
+	 */
+	if (board_pdata && board_pdata->get_pendown_state) {
+		err = gpio_request_one(gpio_pendown, GPIOF_IN, "TSPenDown");
+		if (err) {
+			pr_err("Couldn't obtain gpio for TSPenDown: %d\n", err);
+			return;
+		}
+
+		if (gpio_debounce)
+			gpio_set_debounce(gpio_pendown, gpio_debounce);
+
+		gpio_export(gpio_pendown, 0);
+	}
+
+	spi_bi->bus_num	= bus_num;
+	spi_bi->irq	= gpio_to_irq(gpio_pendown);
+
+	ads7846_config.gpio_pendown = gpio_pendown;
+
+	if (board_pdata) {
+		board_pdata->gpio_pendown = gpio_pendown;
+		board_pdata->gpio_pendown_debounce = gpio_debounce;
+		spi_bi->platform_data = board_pdata;
+	}
+
+	spi_register_board_info(&ads7846_spi_board_info, 1);
+}
+#else
+void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
+			      struct ads7846_platform_data *board_pdata)
+{
+}
+#endif