i2c: mv64xxx: Add Allwinner sun4i compatible

Add the compatible string for the Allwinner A10 i2c controller and the
associated register layout.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

2 files changed, 13 insertions, 1 deletions

diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 6582611bfee6..96c6d82da3ed 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -497,10 +497,11 @@ config I2C_MPC
 
 config I2C_MV64XXX
         tristate "Marvell mv64xxx I2C Controller"
-        depends on (MV64X60 || PLAT_ORION)
+        depends on (MV64X60 || PLAT_ORION || ARCH_SUNXI)
         help
           If you say yes to this option, support will be included for the
           built-in I2C interface on the Marvell 64xxx line of host bridges.
+          This driver is also used for Allwinner SoCs I2C controllers.
 
           This driver can also be built as a module.  If so, the module
           will be called i2c-mv64xxx.
diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c
index 7ba9bac18478..7a0e39b7f928 100644
--- a/drivers/i2c/busses/i2c-mv64xxx.c
+++ b/drivers/i2c/busses/i2c-mv64xxx.c
@@ -129,6 +129,16 @@ static struct mv64xxx_i2c_regs mv64xxx_i2c_regs_mv64xxx = {
         .soft_reset     = 0x1c,
 };
 
+static struct mv64xxx_i2c_regs mv64xxx_i2c_regs_sun4i = {
+        .addr           = 0x00,
+        .ext_addr       = 0x04,
+        .data           = 0x08,
+        .control        = 0x0c,
+        .status         = 0x10,
+        .clock          = 0x14,
+        .soft_reset     = 0x18,
+};
+
 static void
 mv64xxx_i2c_prepare_for_io(struct mv64xxx_i2c_data *drv_data,
         struct i2c_msg *msg)
@@ -509,6 +519,7 @@ static const struct i2c_algorithm mv64xxx_i2c_algo = {
  *****************************************************************************
  */
 static const struct of_device_id mv64xxx_i2c_of_match_table[] = {
+        { .compatible = "allwinner,sun4i-i2c", .data = &mv64xxx_i2c_regs_sun4i},
         { .compatible = "marvell,mv64xxx-i2c", .data = &mv64xxx_i2c_regs_mv64xxx},
         {}
 };