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authorGregory CLEMENT <gregory.clement@free-electrons.com>2018-01-16 17:35:39 +0100
committerWolfram Sang <wsa@the-dreams.de>2018-01-26 18:51:03 +0100
commit1534156e999735fe0befad958e1447600c0c20e7 (patch)
treed846509f8e3b074a5af5e47e3b690f8c3fa7969c /Documentation
parenti2c: mv64xxx: Remove useless test before clk_disable_unprepare (diff)
downloadlinux-1534156e999735fe0befad958e1447600c0c20e7.tar.xz
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i2c: mv64xxx: Fix clock resource by adding an optional bus clock
On Armada 7K/8K we need to explicitly enable the bus clock. The bus clock is optional because not all the SoCs need them but at least for Armada 7K/8K it is actually mandatory. The binding documentation is updating accordingly. Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt20
1 files changed, 20 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt
index 5c30026921ae..0ffe65a316ae 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt
@@ -25,6 +25,15 @@ default frequency is 100kHz
whenever you're using the "allwinner,sun6i-a31-i2c"
compatible.
+ - clocks: : pointers to the reference clocks for this device, the
+ first one is the one used for the clock on the i2c bus,
+ the second one is the clock used to acces the registers
+ of the controller
+
+ - clock-names : names of used clocks, mandatory if the second clock is
+ used, the name must be "core", and "reg" (the latter is
+ only for Armada 7K/8K).
+
Examples:
i2c@11000 {
@@ -42,3 +51,14 @@ For the Armada XP:
interrupts = <29>;
clock-frequency = <100000>;
};
+
+For the Armada 7040:
+
+ i2c@701000 {
+ compatible = "marvell,mv78230-i2c";
+ reg = <0x701000 0x20>;
+ interrupts = <29>;
+ clock-frequency = <100000>;
+ clock-names = "core", "reg";
+ clocks = <&core_clock>, <&reg_clock>;
+ };