From: Chen Feng <puck.chen@hisilicon.com>
Date: Sun, 14 Feb 2016 06:29:19 +0000 (+0800)
Subject: mfd: hi655x: Add document for hi665x PMIC
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=cbdd535d9481025a5a9020f9e9875b68ad86111c;p=openwrt%2Fstaging%2Fblogic.git

mfd: hi655x: Add document for hi665x PMIC

DT bindings for hisilicon HI655x PMIC chip.

Signed-off-by: Chen Feng <puck.chen@hisilicon.com>
Signed-off-by: Fei Wang <w.f@huawei.com>
Signed-off-by: Xinwei Kong <kong.kongxinwei@hisilicon.com>
Reviewed-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---

diff --git a/Documentation/devicetree/bindings/mfd/hisilicon,hi655x.txt b/Documentation/devicetree/bindings/mfd/hisilicon,hi655x.txt
new file mode 100644
index 000000000000..05485699d70e
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/hisilicon,hi655x.txt
@@ -0,0 +1,27 @@
+Hisilicon Hi655x Power Management Integrated Circuit (PMIC)
+
+The hardware layout for access PMIC Hi655x from AP SoC Hi6220.
+Between PMIC Hi655x and Hi6220, the physical signal channel is SSI.
+We can use memory-mapped I/O to communicate.
+
++----------------+             +-------------+
+|                |             |             |
+|    Hi6220      |   SSI bus   |   Hi655x    |
+|                |-------------|             |
+|                |(REGMAP_MMIO)|             |
++----------------+             +-------------+
+
+Required properties:
+- compatible:           Should be "hisilicon,hi655x-pmic".
+- reg:                  Base address of PMIC on Hi6220 SoC.
+- interrupt-controller: Hi655x has internal IRQs (has own IRQ domain).
+- pmic-gpios:           The GPIO used by PMIC IRQ.
+
+Example:
+	pmic: pmic@f8000000 {
+		compatible = "hisilicon,hi655x-pmic";
+		reg = <0x0 0xf8000000 0x0 0x1000>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		pmic-gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
+	}