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Message-ID: <1430901427-65146-2-git-send-email-eddie.huang@mediatek.com>
Date: Wed, 6 May 2015 16:37:05 +0800
From: Eddie Huang <eddie.huang@...iatek.com>
To: Wolfram Sang <wsa@...-dreams.de>,
Sascha Hauer <kernel@...gutronix.de>
CC: <srv_heupstream@...iatek.com>, Rob Herring <robh+dt@...nel.org>,
Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Jean Delvare <jdelvare@...e.de>,
David Box <david.e.box@...ux.intel.com>,
Doug Anderson <dianders@...omium.org>,
Zhangfei Gao <zhangfei.gao@...aro.org>,
Max Schwarz <max.schwarz@...ine.de>,
Boris BREZILLON <boris.brezillon@...e-electrons.com>,
Anders Berg <anders.berg@...gotech.com>,
Neelesh Gupta <neelegup@...ux.vnet.ibm.com>,
Lee Jones <lee.jones@...aro.org>,
Arnd Bergmann <arnd@...db.de>, Ray Jui <rjui@...adcom.com>,
Simon Glass <sjg@...omium.org>,
Wei Yan <sledge.yanwei@...wei.com>,
Beniamino Galvani <b.galvani@...il.com>,
Xudong Chen <xudong.chen@...iatek.com>,
Liguo Zhang <liguo.zhang@...iatek.com>,
<linux-i2c@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>,
Eddie Huang <eddie.huang@...iatek.com>
Subject: [PATCH v7 1/3] dt-bindings: Add I2C bindings for mt65xx/mt81xx.
From: Xudong Chen <xudong.chen@...iatek.com>
Add devicetree bindings for Mediatek Soc I2C driver.
Signed-off-by: Xudong Chen <xudong.chen@...iatek.com>
Signed-off-by: Eddie Huang <eddie.huang@...iatek.com>
---
.../devicetree/bindings/i2c/i2c-mt6577.txt | 41 ++++++++++++++++++++++
1 file changed, 41 insertions(+)
create mode 100644 Documentation/devicetree/bindings/i2c/i2c-mt6577.txt
diff --git a/Documentation/devicetree/bindings/i2c/i2c-mt6577.txt b/Documentation/devicetree/bindings/i2c/i2c-mt6577.txt
new file mode 100644
index 0000000..0ce6fa3
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-mt6577.txt
@@ -0,0 +1,41 @@
+* Mediatek's I2C controller
+
+The Mediatek's I2C controller is used to interface with I2C devices.
+
+Required properties:
+ - compatible: value should be either of the following.
+ (a) "mediatek,mt6577-i2c", for i2c compatible with mt6577 i2c.
+ (b) "mediatek,mt6589-i2c", for i2c compatible with mt6589 i2c.
+ (c) "mediatek,mt8127-i2c", for i2c compatible with mt8127 i2c.
+ (d) "mediatek,mt8135-i2c", for i2c compatible with mt8135 i2c.
+ (e) "mediatek,mt8173-i2c", for i2c compatible with mt8173 i2c.
+ - reg: physical base address of the controller and dma base, length of memory
+ mapped region.
+ - interrupts: interrupt number to the cpu.
+ - clock-div: the fixed value for frequency divider of clock source in i2c
+ module. Each IC may be different.
+ - clocks: clock name from clock manager
+ - clock-names: Must include "main" and "dma", if enable have-pmic need include
+ "pmic" extra.
+
+Optional properties:
+ - clock-frequency: Frequency in Hz of the bus when transfer, the default value
+ is 100000.
+ - mediatek,have-pmic: platform can control i2c form special pmic side.
+ Only mt6589 and mt8135 support this feature.
+ - mediatek,use-push-pull: IO config use push-pull mode.
+
+Example:
+
+ i2c0: i2c@...0d000 {
+ compatible = "mediatek,mt6577-i2c";
+ reg = <0x1100d000 0x70>,
+ <0x11000300 0x80>;
+ interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_LOW>;
+ clock-frequency = <400000>;
+ mediatek,have-pmic;
+ clock-div = <16>;
+ clocks = <&i2c0_ck>, <&ap_dma_ck>;
+ clock-names = "main", "dma";
+ };
+
--
1.8.1.1.dirty
--
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