[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/input/misc/adxl34x-spi.c b/src/kernel/linux/v4.14/drivers/input/misc/adxl34x-spi.c
new file mode 100644
index 0000000..3ec03ad
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/input/misc/adxl34x-spi.c
@@ -0,0 +1,133 @@
+/*
+ * ADLX345/346 Three-Axis Digital Accelerometers (SPI Interface)
+ *
+ * Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Copyright (C) 2009 Michael Hennerich, Analog Devices Inc.
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/input.h> /* BUS_SPI */
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/pm.h>
+#include <linux/types.h>
+#include "adxl34x.h"
+
+#define MAX_SPI_FREQ_HZ 5000000
+#define MAX_FREQ_NO_FIFODELAY 1500000
+#define ADXL34X_CMD_MULTB (1 << 6)
+#define ADXL34X_CMD_READ (1 << 7)
+#define ADXL34X_WRITECMD(reg) (reg & 0x3F)
+#define ADXL34X_READCMD(reg) (ADXL34X_CMD_READ | (reg & 0x3F))
+#define ADXL34X_READMB_CMD(reg) (ADXL34X_CMD_READ | ADXL34X_CMD_MULTB \
+ | (reg & 0x3F))
+
+static int adxl34x_spi_read(struct device *dev, unsigned char reg)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ unsigned char cmd;
+
+ cmd = ADXL34X_READCMD(reg);
+
+ return spi_w8r8(spi, cmd);
+}
+
+static int adxl34x_spi_write(struct device *dev,
+ unsigned char reg, unsigned char val)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ unsigned char buf[2];
+
+ buf[0] = ADXL34X_WRITECMD(reg);
+ buf[1] = val;
+
+ return spi_write(spi, buf, sizeof(buf));
+}
+
+static int adxl34x_spi_read_block(struct device *dev,
+ unsigned char reg, int count,
+ void *buf)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ ssize_t status;
+
+ reg = ADXL34X_READMB_CMD(reg);
+ status = spi_write_then_read(spi, ®, 1, buf, count);
+
+ return (status < 0) ? status : 0;
+}
+
+static const struct adxl34x_bus_ops adxl34x_spi_bops = {
+ .bustype = BUS_SPI,
+ .write = adxl34x_spi_write,
+ .read = adxl34x_spi_read,
+ .read_block = adxl34x_spi_read_block,
+};
+
+static int adxl34x_spi_probe(struct spi_device *spi)
+{
+ struct adxl34x *ac;
+
+ /* don't exceed max specified SPI CLK frequency */
+ if (spi->max_speed_hz > MAX_SPI_FREQ_HZ) {
+ dev_err(&spi->dev, "SPI CLK %d Hz too fast\n", spi->max_speed_hz);
+ return -EINVAL;
+ }
+
+ ac = adxl34x_probe(&spi->dev, spi->irq,
+ spi->max_speed_hz > MAX_FREQ_NO_FIFODELAY,
+ &adxl34x_spi_bops);
+
+ if (IS_ERR(ac))
+ return PTR_ERR(ac);
+
+ spi_set_drvdata(spi, ac);
+
+ return 0;
+}
+
+static int adxl34x_spi_remove(struct spi_device *spi)
+{
+ struct adxl34x *ac = spi_get_drvdata(spi);
+
+ return adxl34x_remove(ac);
+}
+
+static int __maybe_unused adxl34x_spi_suspend(struct device *dev)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ struct adxl34x *ac = spi_get_drvdata(spi);
+
+ adxl34x_suspend(ac);
+
+ return 0;
+}
+
+static int __maybe_unused adxl34x_spi_resume(struct device *dev)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ struct adxl34x *ac = spi_get_drvdata(spi);
+
+ adxl34x_resume(ac);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(adxl34x_spi_pm, adxl34x_spi_suspend,
+ adxl34x_spi_resume);
+
+static struct spi_driver adxl34x_driver = {
+ .driver = {
+ .name = "adxl34x",
+ .pm = &adxl34x_spi_pm,
+ },
+ .probe = adxl34x_spi_probe,
+ .remove = adxl34x_spi_remove,
+};
+
+module_spi_driver(adxl34x_driver);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer SPI Bus Driver");
+MODULE_LICENSE("GPL");