drivers: misc: Import SPI Xiaomi touchpanel driver

* From dagu-s-oss
* Run clang-format on source files

Change-Id: I2e7eb87cf0e116f85dbe84dd144eea6d70434302

include/linux/spi-xiaomi-tp.h

@@ -0,0 +1,53 @@
+#ifndef _SPI_XIAOMI_TP_H
+#define _SPI_XIAOMI_TP_H
+
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/sysfs.h>
+
+#define TP_SPI_DEBUG
+
+#define TP_TAG "[TP_SPI]: "
+
+#undef PDEBUG
+#ifdef TP_SPI_DEBUG
+#ifdef __KERNEL__
+#define PDEBUG(fmt, args...) printk(KERN_ERR TP_TAG fmt, ##args)
+#else /*NO __KERNEL__*/
+#define PDEBUG(fmt, args...) fprintf(stderr, TP_TAG fmt, ##args)
+#endif /*END __KERNEL__*/
+#else /*NO TP_SPI_DEBUG*/
+#define PDEBUG(fmt, args...)
+#endif /*END TP_SPI_DEBUG*/
+
+#undef PDEBUGG
+#define PDEBUGG(fmt, args...)
+
+#define NAME_MAX_LENS 32
+
+/*lock@:protect this struct
+ *name@:indicate who own this device
+ *used@:indicate this device has it owner
+ *tmp@:device in using but don't has it owner
+ *init&:indicate ts_xsfer already init.
+ *client@:pointer to spi device
+ */
+struct ts_spi_info {
+	struct mutex lock;
+	char name[NAME_MAX_LENS];
+	bool used;
+	bool tmp;
+	bool init;
+	struct spi_device *client;
+};
+
+extern int32_t tmp_hold_ts_xsfer(struct spi_device **client);
+extern void tmp_drop_ts_xsfer(void);
+extern int32_t get_ts_xsfer(const char *name);
+extern void put_ts_xsfer(const char *name);
+extern const char *get_owner_name(void);
+extern struct spi_device *test_then_get_spi(const char *name);
+
+#endif /*_SPI_XIAOMI_TP_H*/