i2c: atmel: add driver for atmel i2c

index 9324c6c..e71fc51 100644
@@ -58,6 +58,16 @@ config DM_I2C_GPIO
 	  bindings are supported.
 	  Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt
 
+config SYS_I2C_AT91
+	bool "Atmel I2C driver"
+	depends on DM_I2C && ARCH_AT91
+	help
+	  Add support for the Atmel I2C driver. A serious problem is that there
+	  is no documented way to issue repeated START conditions for more than
+	  two messages, as needed to support combined I2C messages. Use the
+	  i2c-gpio driver unless your system can cope with this limitation.
+	  Binding info: doc/device-tree-bindings/i2c/i2c-at91.txt
+
 config SYS_I2C_CADENCE
 	tristate "Cadence I2C Controller"
 	depends on DM_I2C && (ARCH_ZYNQ || ARM64)

index 167424d..c5362a5 100644
@@ -16,6 +16,7 @@ obj-$(CONFIG_PCA9564_I2C) += pca9564_i2c.o
 obj-$(CONFIG_TSI108_I2C) += tsi108_i2c.o
 obj-$(CONFIG_SH_SH7734_I2C) += sh_sh7734_i2c.o
 obj-$(CONFIG_SYS_I2C) += i2c_core.o
+obj-$(CONFIG_SYS_I2C_AT91) += at91_i2c.o
 obj-$(CONFIG_SYS_I2C_CADENCE) += i2c-cdns.o
 obj-$(CONFIG_SYS_I2C_DAVINCI) += davinci_i2c.o
 obj-$(CONFIG_SYS_I2C_DW) += designware_i2c.o

new file mode 100644
index 0000000..3432a13
@@ -0,0 +1,24 @@
+I2C for Atmel platforms
+
+Required properties :
+- compatible : Must be "atmel,at91rm9200-i2c", "atmel,at91sam9261-i2c",
+     "atmel,at91sam9260-i2c", "atmel,at91sam9g20-i2c", "atmel,at91sam9g10-i2c",
+     "atmel,at91sam9x5-i2c", "atmel,sama5d4-i2c" or "atmel,sama5d2-i2c".
+- reg: physical base address of the controller and length of memory mapped
+     region.
+- #address-cells = <1>;
+- #size-cells = <0>;
+
+Optional properties:
+- clock-frequency: Desired I2C bus frequency in Hz, default value is 100000.
+- Child nodes conforming to i2c bus binding.
+
+Examples :
+
+i2c0: i2c at f8028000 {
+	compatible = "atmel,sama5d2-i2c";
+	reg = <0xf8028000 0x100>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+	clock-frequency = <100000>;
+};