i2c: riic: add driver

Tested with a r7s72100 genmai board acessing an eeprom.

Signed-off-by: Wolfram Sang <wsa@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

1 files changed, 29 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/i2c/i2c-riic.txt b/Documentation/devicetree/bindings/i2c/i2c-riic.txt
new file mode 100644
index 000000000000..0bcc4716c319
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-riic.txt
@@ -0,0 +1,29 @@
+Device tree configuration for Renesas RIIC driver
+
+Required properties:
+- compatible      : "renesas,riic-<soctype>". "renesas,riic-rz" as fallback
+- reg             : address start and address range size of device
+- interrupts      : 8 interrupts (TEI, RI, TI, SPI, STI, NAKI, ALI, TMOI)
+- clock-frequency : frequency of bus clock in Hz
+- #address-cells  : should be <1>
+- #size-cells     : should be <0>
+
+Pinctrl properties might be needed, too. See there.
+
+Example:
+
+        i2c0: i2c@fcfee000 {
+                compatible = "renesas,riic-r7s72100", "renesas,riic-rz";
+                reg = <0xfcfee000 0x44>;
+                interrupts = <0 157 IRQ_TYPE_LEVEL_HIGH>,
+                             <0 158 IRQ_TYPE_EDGE_RISING>,
+                             <0 159 IRQ_TYPE_EDGE_RISING>,
+                             <0 160 IRQ_TYPE_LEVEL_HIGH>,
+                             <0 161 IRQ_TYPE_LEVEL_HIGH>,
+                             <0 162 IRQ_TYPE_LEVEL_HIGH>,
+                             <0 163 IRQ_TYPE_LEVEL_HIGH>,
+                             <0 164 IRQ_TYPE_LEVEL_HIGH>;
+                clock-frequency = <100000>;
+                #address-cells = <1>;
+                #size-cells = <0>;
+        };