mfd: Separate out STMPE controller and interface specific code

Few STMPE controller can have register interface over SPI or I2C. Current
implementation only supports I2C and all code is present in a single file
stmpe.c. It would be better to separate out I2C interface specific code from
controller specific code. Later SPI specific code can be added in a separate
file.

This patch separates out I2C and controller specific code into separate files,
making stmpe.c independent of I2C.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/drivers/mfd/stmpe.h b/drivers/mfd/stmpe.h
index e4ee38956583..18d89a68ce40 100644
--- a/drivers/mfd/stmpe.h
+++ b/drivers/mfd/stmpe.h
@@ -8,6 +8,14 @@
 #ifndef __STMPE_H
 #define __STMPE_H
 
+#include <linux/device.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/stmpe.h>
+#include <linux/printk.h>
+#include <linux/types.h>
+
+extern const struct dev_pm_ops stmpe_dev_pm_ops;
+
 #ifdef STMPE_DUMP_BYTES
 static inline void stmpe_dump_bytes(const char *str, const void *buf,
                                     size_t len)
@@ -67,6 +75,31 @@ struct stmpe_variant_info {
         int (*enable_autosleep)(struct stmpe *stmpe, int autosleep_timeout);
 };
 
+/**
+ * struct stmpe_client_info - i2c or spi specific routines/info
+ * @data: client specific data
+ * @read_byte: read single byte
+ * @write_byte: write single byte
+ * @read_block: read block or multiple bytes
+ * @write_block: write block or multiple bytes
+ * @init: client init routine, called during probe
+ */
+struct stmpe_client_info {
+        void *data;
+        int irq;
+        void *client;
+        struct device *dev;
+        int (*read_byte)(struct stmpe *stmpe, u8 reg);
+        int (*write_byte)(struct stmpe *stmpe, u8 reg, u8 val);
+        int (*read_block)(struct stmpe *stmpe, u8 reg, u8 len, u8 *values);
+        int (*write_block)(struct stmpe *stmpe, u8 reg, u8 len,
+                        const u8 *values);
+        void (*init)(struct stmpe *stmpe);
+};
+
+int stmpe_probe(struct stmpe_client_info *ci, int partnum);
+int stmpe_remove(struct stmpe *stmpe);
+
 #define STMPE_ICR_LSB_HIGH      (1 << 2)
 #define STMPE_ICR_LSB_EDGE      (1 << 1)
 #define STMPE_ICR_LSB_GIM       (1 << 0)