Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 268 insertions, 0 deletions

diff --git a/kernel/drivers/input/keyboard/w90p910_keypad.c b/kernel/drivers/input/keyboard/w90p910_keypad.c
new file mode 100644
index 000000000..a1ff69c53
--- /dev/null
+++ b/kernel/drivers/input/keyboard/w90p910_keypad.c
@@ -0,0 +1,268 @@
+/*
+ * Copyright (c) 2008-2009 Nuvoton technology corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation;version 2 of the License.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+
+#include <linux/platform_data/keypad-w90p910.h>
+
+/* Keypad Interface Control Registers */
+#define KPI_CONF		0x00
+#define KPI_3KCONF		0x04
+#define KPI_LPCONF		0x08
+#define KPI_STATUS		0x0C
+
+#define IS1KEY			(0x01 << 16)
+#define INTTR			(0x01 << 21)
+#define KEY0R			(0x0f << 3)
+#define KEY0C			0x07
+#define DEBOUNCE_BIT		0x08
+#define KSIZE0			(0x01 << 16)
+#define KSIZE1			(0x01 << 17)
+#define KPSEL			(0x01 << 19)
+#define ENKP			(0x01 << 18)
+
+#define KGET_RAW(n)		(((n) & KEY0R) >> 3)
+#define KGET_COLUMN(n)		((n) & KEY0C)
+
+#define W90P910_NUM_ROWS	8
+#define W90P910_NUM_COLS	8
+#define W90P910_ROW_SHIFT	3
+
+struct w90p910_keypad {
+	const struct w90p910_keypad_platform_data *pdata;
+	struct clk *clk;
+	struct input_dev *input_dev;
+	void __iomem *mmio_base;
+	int irq;
+	unsigned short keymap[W90P910_NUM_ROWS * W90P910_NUM_COLS];
+};
+
+static void w90p910_keypad_scan_matrix(struct w90p910_keypad *keypad,
+							unsigned int status)
+{
+	struct input_dev *input_dev = keypad->input_dev;
+	unsigned int row = KGET_RAW(status);
+	unsigned int col = KGET_COLUMN(status);
+	unsigned int code = MATRIX_SCAN_CODE(row, col, W90P910_ROW_SHIFT);
+	unsigned int key = keypad->keymap[code];
+
+	input_event(input_dev, EV_MSC, MSC_SCAN, code);
+	input_report_key(input_dev, key, 1);
+	input_sync(input_dev);
+
+	input_event(input_dev, EV_MSC, MSC_SCAN, code);
+	input_report_key(input_dev, key, 0);
+	input_sync(input_dev);
+}
+
+static irqreturn_t w90p910_keypad_irq_handler(int irq, void *dev_id)
+{
+	struct w90p910_keypad *keypad = dev_id;
+	unsigned int  kstatus, val;
+
+	kstatus = __raw_readl(keypad->mmio_base + KPI_STATUS);
+
+	val = INTTR | IS1KEY;
+
+	if (kstatus & val)
+		w90p910_keypad_scan_matrix(keypad, kstatus);
+
+	return IRQ_HANDLED;
+}
+
+static int w90p910_keypad_open(struct input_dev *dev)
+{
+	struct w90p910_keypad *keypad = input_get_drvdata(dev);
+	const struct w90p910_keypad_platform_data *pdata = keypad->pdata;
+	unsigned int val, config;
+
+	/* Enable unit clock */
+	clk_enable(keypad->clk);
+
+	val = __raw_readl(keypad->mmio_base + KPI_CONF);
+	val |= (KPSEL | ENKP);
+	val &= ~(KSIZE0 | KSIZE1);
+
+	config = pdata->prescale | (pdata->debounce << DEBOUNCE_BIT);
+
+	val |= config;
+
+	__raw_writel(val, keypad->mmio_base + KPI_CONF);
+
+	return 0;
+}
+
+static void w90p910_keypad_close(struct input_dev *dev)
+{
+	struct w90p910_keypad *keypad = input_get_drvdata(dev);
+
+	/* Disable clock unit */
+	clk_disable(keypad->clk);
+}
+
+static int w90p910_keypad_probe(struct platform_device *pdev)
+{
+	const struct w90p910_keypad_platform_data *pdata =
+						dev_get_platdata(&pdev->dev);
+	const struct matrix_keymap_data *keymap_data;
+	struct w90p910_keypad *keypad;
+	struct input_dev *input_dev;
+	struct resource *res;
+	int irq;
+	int error;
+
+	if (!pdata) {
+		dev_err(&pdev->dev, "no platform data defined\n");
+		return -EINVAL;
+	}
+
+	keymap_data = pdata->keymap_data;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		dev_err(&pdev->dev, "failed to get keypad irq\n");
+		return -ENXIO;
+	}
+
+	keypad = kzalloc(sizeof(struct w90p910_keypad), GFP_KERNEL);
+	input_dev = input_allocate_device();
+	if (!keypad || !input_dev) {
+		dev_err(&pdev->dev, "failed to allocate driver data\n");
+		error = -ENOMEM;
+		goto failed_free;
+	}
+
+	keypad->pdata = pdata;
+	keypad->input_dev = input_dev;
+	keypad->irq = irq;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (res == NULL) {
+		dev_err(&pdev->dev, "failed to get I/O memory\n");
+		error = -ENXIO;
+		goto failed_free;
+	}
+
+	res = request_mem_region(res->start, resource_size(res), pdev->name);
+	if (res == NULL) {
+		dev_err(&pdev->dev, "failed to request I/O memory\n");
+		error = -EBUSY;
+		goto failed_free;
+	}
+
+	keypad->mmio_base = ioremap(res->start, resource_size(res));
+	if (keypad->mmio_base == NULL) {
+		dev_err(&pdev->dev, "failed to remap I/O memory\n");
+		error = -ENXIO;
+		goto failed_free_res;
+	}
+
+	keypad->clk = clk_get(&pdev->dev, NULL);
+	if (IS_ERR(keypad->clk)) {
+		dev_err(&pdev->dev, "failed to get keypad clock\n");
+		error = PTR_ERR(keypad->clk);
+		goto failed_free_io;
+	}
+
+	/* set multi-function pin for w90p910 kpi. */
+	mfp_set_groupi(&pdev->dev);
+
+	input_dev->name = pdev->name;
+	input_dev->id.bustype = BUS_HOST;
+	input_dev->open = w90p910_keypad_open;
+	input_dev->close = w90p910_keypad_close;
+	input_dev->dev.parent = &pdev->dev;
+
+	error = matrix_keypad_build_keymap(keymap_data, NULL,
+					   W90P910_NUM_ROWS, W90P910_NUM_COLS,
+					   keypad->keymap, input_dev);
+	if (error) {
+		dev_err(&pdev->dev, "failed to build keymap\n");
+		goto failed_put_clk;
+	}
+
+	error = request_irq(keypad->irq, w90p910_keypad_irq_handler,
+			    0, pdev->name, keypad);
+	if (error) {
+		dev_err(&pdev->dev, "failed to request IRQ\n");
+		goto failed_put_clk;
+	}
+
+	__set_bit(EV_REP, input_dev->evbit);
+	input_set_capability(input_dev, EV_MSC, MSC_SCAN);
+	input_set_drvdata(input_dev, keypad);
+
+	/* Register the input device */
+	error = input_register_device(input_dev);
+	if (error) {
+		dev_err(&pdev->dev, "failed to register input device\n");
+		goto failed_free_irq;
+	}
+
+	platform_set_drvdata(pdev, keypad);
+	return 0;
+
+failed_free_irq:
+	free_irq(irq, keypad);
+failed_put_clk:
+	clk_put(keypad->clk);
+failed_free_io:
+	iounmap(keypad->mmio_base);
+failed_free_res:
+	release_mem_region(res->start, resource_size(res));
+failed_free:
+	input_free_device(input_dev);
+	kfree(keypad);
+	return error;
+}
+
+static int w90p910_keypad_remove(struct platform_device *pdev)
+{
+	struct w90p910_keypad *keypad = platform_get_drvdata(pdev);
+	struct resource *res;
+
+	free_irq(keypad->irq, keypad);
+
+	clk_put(keypad->clk);
+
+	input_unregister_device(keypad->input_dev);
+
+	iounmap(keypad->mmio_base);
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	release_mem_region(res->start, resource_size(res));
+
+	kfree(keypad);
+
+	return 0;
+}
+
+static struct platform_driver w90p910_keypad_driver = {
+	.probe		= w90p910_keypad_probe,
+	.remove		= w90p910_keypad_remove,
+	.driver		= {
+		.name	= "nuc900-kpi",
+	},
+};
+module_platform_driver(w90p910_keypad_driver);
+
+MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
+MODULE_DESCRIPTION("w90p910 keypad driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:nuc900-keypad");