Merge branch 'i2c/for-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c updates from Wolfram Sang:
 "Features:

   - new drivers: Renesas EMEV2, register based MUX, NXP LPC2xxx
   - core: scans DT and assigns wakeup interrupts.  no driver changes needed.
   - core: some refcouting issues fixed and better API for that
   - core: new helper function for best effort block read emulation
   - slave framework: proper DT bindings and userspace instantiation
   - some bigger work for xiic, pxa, omap drivers

  .. and quite a number of smaller driver fixes, cleanups, improvements"

* 'i2c/for-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (65 commits)
  i2c: mux: reg Change ioread endianness for readback
  i2c: mux: reg: fix compilation warnings
  i2c: mux: reg: simplify register size checking
  i2c: muxes: fix leaked i2c adapter device node references
  i2c: allow specifying separate wakeup interrupt in device tree
  of/irq: export of_get_irq_byname()
  i2c: xgene-slimpro: dma_mapping_error() doesn't return an error code
  i2c: Replace I2C_CROS_EC_TUNNEL dependency
  eeprom: at24: use i2c_smbus_read_i2c_block_data_or_emulated
  i2c: core: Add support for best effort block read emulation
  i2c: lpc2k: add driver
  i2c: mux: Add register-based mux i2c-mux-reg
  i2c: dt: describe generic bindings
  i2c: slave: print warning if slave flag not set
  i2c: support 10 bit and slave addresses in sysfs 'new_device'
  i2c: take address space into account when checking for used addresses
  i2c: apply DT flags when probing
  i2c: make address check indpendent from client struct
  i2c: rename address check functions
  i2c: apply address offset for slaves, too
  ...

2 files changed, 59 insertions, 4 deletions

diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index e83a738a3b87..768063baafbf 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -121,6 +121,9 @@ extern s32 i2c_smbus_read_i2c_block_data(const struct i2c_client *client,
 extern s32 i2c_smbus_write_i2c_block_data(const struct i2c_client *client,
                                           u8 command, u8 length,
                                           const u8 *values);
+extern s32
+i2c_smbus_read_i2c_block_data_or_emulated(const struct i2c_client *client,
+                                          u8 command, u8 length, u8 *values);
 #endif /* I2C */
 
 /**
@@ -550,11 +553,12 @@ void i2c_lock_adapter(struct i2c_adapter *);
 void i2c_unlock_adapter(struct i2c_adapter *);
 
 /*flags for the client struct: */
-#define I2C_CLIENT_PEC  0x04            /* Use Packet Error Checking */
-#define I2C_CLIENT_TEN  0x10            /* we have a ten bit chip address */
+#define I2C_CLIENT_PEC          0x04    /* Use Packet Error Checking */
+#define I2C_CLIENT_TEN          0x10    /* we have a ten bit chip address */
                                         /* Must equal I2C_M_TEN below */
-#define I2C_CLIENT_WAKE 0x80            /* for board_info; true iff can wake */
-#define I2C_CLIENT_SCCB 0x9000          /* Use Omnivision SCCB protocol */
+#define I2C_CLIENT_SLAVE        0x20    /* we are the slave */
+#define I2C_CLIENT_WAKE         0x80    /* for board_info; true iff can wake */
+#define I2C_CLIENT_SCCB         0x9000  /* Use Omnivision SCCB protocol */
                                         /* Must match I2C_M_STOP|IGNORE_NAK */
 
 /* i2c adapter classes (bitmask) */
@@ -638,6 +642,8 @@ extern struct i2c_client *of_find_i2c_device_by_node(struct device_node *node);
 /* must call put_device() when done with returned i2c_adapter device */
 extern struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node *node);
 
+/* must call i2c_put_adapter() when done with returned i2c_adapter device */
+struct i2c_adapter *of_get_i2c_adapter_by_node(struct device_node *node);
 #else
 
 static inline struct i2c_client *of_find_i2c_device_by_node(struct device_node *node)
@@ -649,6 +655,11 @@ static inline struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node
 {
         return NULL;
 }
+
+static inline struct i2c_adapter *of_get_i2c_adapter_by_node(struct device_node *node)
+{
+        return NULL;
+}
 #endif /* CONFIG_OF */
 
 #endif /* _LINUX_I2C_H */
diff --git a/include/linux/platform_data/i2c-mux-reg.h b/include/linux/platform_data/i2c-mux-reg.h
new file mode 100644
index 000000000000..c68712aadf43
--- /dev/null
+++ b/include/linux/platform_data/i2c-mux-reg.h
@@ -0,0 +1,44 @@
+/*
+ * I2C multiplexer using a single register
+ *
+ * Copyright 2015 Freescale Semiconductor
+ * York Sun <yorksun@freescale.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; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __LINUX_PLATFORM_DATA_I2C_MUX_REG_H
+#define __LINUX_PLATFORM_DATA_I2C_MUX_REG_H
+
+/**
+ * struct i2c_mux_reg_platform_data - Platform-dependent data for i2c-mux-reg
+ * @parent: Parent I2C bus adapter number
+ * @base_nr: Base I2C bus number to number adapters from or zero for dynamic
+ * @values: Array of value for each channel
+ * @n_values: Number of multiplexer channels
+ * @little_endian: Indicating if the register is in little endian
+ * @write_only: Reading the register is not allowed by hardware
+ * @classes: Optional I2C auto-detection classes
+ * @idle: Value to write to mux when idle
+ * @idle_in_use: indicate if idle value is in use
+ * @reg: Virtual address of the register to switch channel
+ * @reg_size: register size in bytes
+ */
+struct i2c_mux_reg_platform_data {
+        int parent;
+        int base_nr;
+        const unsigned int *values;
+        int n_values;
+        bool little_endian;
+        bool write_only;
+        const unsigned int *classes;
+        u32 idle;
+        bool idle_in_use;
+        void __iomem *reg;
+        resource_size_t reg_size;
+};
+
+#endif  /* __LINUX_PLATFORM_DATA_I2C_MUX_REG_H */