From mboxrd@z Thu Jan 1 00:00:00 1970 From: Biwen Li Subject: [v5,2/2] Documentation: dt: binding: rtc: add binding for ftm alarm driver Date: Tue, 16 Jul 2019 18:16:55 +0800 Message-ID: <20190716101655.47418-2-biwen.li@nxp.com> References: <20190716101655.47418-1-biwen.li@nxp.com> Return-path: In-Reply-To: <20190716101655.47418-1-biwen.li@nxp.com> Sender: linux-kernel-owner@vger.kernel.org To: a.zummo@towertech.it, alexandre.belloni@bootlin.com, leoyang.li@nxp.com, robh+dt@kernel.org Cc: linux-rtc@vger.kernel.org, linux-kernel@vger.kernel.org, xiaobo.xie@nxp.com, jiafei.pan@nxp.com, ran.wang_1@nxp.com, mark.rutland@arm.com, devicetree@vger.kernel.org, Biwen Li List-Id: devicetree@vger.kernel.org The patch adds binding for ftm alarm driver Signed-off-by: Biwen Li --- Change in v5: - None Change in v4: - add note about dts and kernel options - add aliases in example Change in v3: - remove reg-names property - correct cells number Change in v2: - replace ls1043a with ls1088a as example - add rcpm node and fsl,rcpm-wakeup property .../bindings/rtc/rtc-fsl-ftm-alarm.txt | 49 +++++++++++++++++++ 1 file changed, 49 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 000000000000..fb018065406c --- /dev/null +++ b/Documentation/devicetree/bindings/rtc/rtc-fsl-ftm-alarm.txt @@ -0,0 +1,49 @@ +Freescale FlexTimer Module (FTM) Alarm + +Note: +- The driver depends on RCPM driver + to wake up system in sleep. +- Need stop using RTC_HCTOSYS or use the DT aliases + to ensure the driver is not used as the primary RTC. + (Select DT aliases defaultly) + +Required properties: +- compatible : Should be "fsl,-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. +- interrupts : Should be the FlexTimer Module interrupt. +- fsl,rcpm-wakeup property and rcpm node : Please refer + Documentation/devicetree/bindings/soc/fsl/rcpm.txt + +Optional properties: +- big-endian: If the host controller is big-endian mode, specify this property. + The default endian mode is little-endian. + +Example: +aliases { + ... + rtc1 = ftm_alarm0; /* Use flextimer alarm driver as /dev/rtc1 */ + ... +}; + +rcpm: rcpm@1e34040 { + compatible = "fsl,ls1088a-rcpm", "fsl,qoriq-rcpm-2.1+"; + reg = <0x0 0x1e34040 0x0 0x18>; + fsl,#rcpm-wakeup-cells = <6>; +}; + +ftm_alarm0: timer@2800000 { + compatible = "fsl,ls1088a-ftm-alarm"; + reg = <0x0 0x2800000 0x0 0x10000>; + fsl,rcpm-wakeup = <&rcpm 0x0 0x0 0x0 0x0 0x4000 0x0>; + interrupts = <0 44 4>; +}; -- 2.17.1