linux-kernel - [v2,2/2] Documentation: dt: binding: rtc: add binding for ftm alarm driver

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Message-Id: <20190710110424.4254-2-biwen.li@nxp.com>
Date:   Wed, 10 Jul 2019 19:04:24 +0800
From:   Biwen Li <biwen.li@....com>
To:     a.zummo@...ertech.it, alexandre.belloni@...tlin.com,
        leoyang.li@....com
Cc:     linux-rtc@...r.kernel.org, linux-kernel@...r.kernel.org,
        xiaobo.xie@....com, jiafei.pan@....com, ran.wang_1@....com,
        Biwen Li <biwen.li@....com>
Subject: [v2,2/2] Documentation: dt: binding: rtc: add binding for ftm alarm driver

The patch adds binding for ftm alarm driver

Signed-off-by: Biwen Li <biwen.li@....com>
---
Change in v2:
    - replace ls1043a with ls1088a as example
    - add rcpm node and fsl,rcpm-wakeup property

 .../devicetree/bindings/rtc/rtc-fsl-ftm-alarm.txt  | 40 ++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/rtc-fsl-ftm-alarm.txt

diff --git a/Documentation/devicetree/bindings/rtc/rtc-fsl-ftm-alarm.txt b/Documentation/devicetree/bindings/rtc/rtc-fsl-ftm-alarm.txt
new file mode 100644
index 0000000..010984a
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/rtc-fsl-ftm-alarm.txt
@@ -0,0 +1,40 @@
+Freescale FlexTimer Module (FTM) Alarm
+
+Note: The driver need work with RCPM driver to wake up system in sleep.
+
+Required properties:
+
+- compatible : Should be "fsl,ftm-alarm" or "fsl,<chip>-ftm-alarm", the
+	       supported chips include
+	       "fsl,ls1012a-ftm-alarm"
+	       "fsl,ls1021a-ftm-alarm"
+	       "fsl,ls1028a-ftm-alarm"
+	       "fsl,ls1043a-ftm-alarm"
+	       "fsl,ls1046a-ftm-alarm"
+	       "fsl,ls1088a-ftm-alarm"
+	       "fsl,ls208xa-ftm-alarm"
+- reg : Specifies base physical address and size of the register sets for the
+  FlexTimer Module and base physical address of IP Powerdown Exception Control
+  Register.
+- reg-names: names of the mapped memory regions listed in regs property.
+  should include the following entries:
+  "ftm":    Address of the register sets for FlexTimer Module
+- interrupts : Should be the FlexTimer Module interrupt.
+- fsl,rcpm-wakeup property and rcpm node : Please refer
+	Documentation/devicetree/bindings/soc/fsl/rcpm.txt
+- big-endian: If the host controller is big-endian mode, specify this property.
+  The default endian mode is little-endian.
+
+Example:
+rcpm: rcpm@...4050 {
+	compatible = "fsl,ls1088a-rcpm", "fsl,qoriq-rcpm-2.1+";
+	reg = <0x0 0x1e34050 0x0 0x4>;
+	fsl,#rcpm-wakeup-cells = <1>;
+}
+
+ftm_alarm0: timer@...0000 {
+	compatible = "fsl,ftm-alarm";
+	reg = <0x0 0x2800000 0x0 0x10000>;
+	fsl,rcpm-wakeup = <&rcpm 0x0 0x4000>;
+	interrupts = <0 44 4>;
+}
-- 
2.7.4