From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jacky Bai Subject: [PATCH 1/3] dt-bindings: power: Add power domain binding for i.mx8m family Date: Wed, 17 Apr 2019 05:27:30 +0000 Message-ID: <20190417053211.2195-2-ping.bai@nxp.com> References: <20190417053211.2195-1-ping.bai@nxp.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20190417053211.2195-1-ping.bai@nxp.com> Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: "robh+dt@kernel.org" , "mark.rutland@arm.com" , "shawnguo@kernel.org" , "s.hauer@pengutronix.de" , "kernel@pengutronix.de" , "l.stach@pengutronix.de" , Aisheng Dong Cc: "devicetree@vger.kernel.org" , "festevam@gmail.com" , dl-linux-imx , "linux-arm-kernel@lists.infradead.org" List-Id: devicetree@vger.kernel.org Add the binding doc of power domain for i.MX8M SOC family. Signed-off-by: Jacky Bai --- .../bindings/power/fsl,imx8m-genpd.txt | 46 +++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/fsl,imx8m-genpd.txt diff --git a/Documentation/devicetree/bindings/power/fsl,imx8m-genpd.txt b/Documentation/devicetree/bindings/power/fsl,imx8m-genpd.txt new file mode 100644 index 000000000000..a92a7103de38 --- /dev/null +++ b/Documentation/devicetree/bindings/power/fsl,imx8m-genpd.txt @@ -0,0 +1,46 @@ +Device Tree Bindings for Freescale i.MX8M Generic Power Domain +============================================================== +The binding for the i.MX8M Generic power Domain[1]. + +[1] Documentation/devicetree/bindings/power/power_domain.txt + +Required properties: + + - compatible: should be of: + - "fsl,imx8m-power-domain" + - #power-domain-cells: Number of cells in a PM domain Specifier, must be 0 + - domain-index: should be the domain index number need to pass to TF-A + - domain-name: the name of this pm domain + +Optional properties: + - clocks: a number of phandles to clocks that need to be enabled during + domain power-up sequence to ensure reset propagation into devices + located inside this power domain + - power-supply: Power supply used to power the domain + - parent-domains: the phandle to the parent power domain + +example: + vpu_g1_pd: vpug1-pd { + compatible = "fsl,imx8mm-pm-domain"; + #power-domain-cells = <0>; + domain-index = <6>; + domain-name = "vpu_g1"; + parent-domains = <&vpumix_pd>; + clocks = <&clk IMX8MM_CLK_VPU_G1_ROOT>; + }; + + +Specifying Power domain for IP modules +====================================== + +IP cores belonging to a power domain should contain a 'power-domains' +property that is a phandle for PGC node representing the domain. + +Example of a device that is part of the vpu_g1 power domain: + vpu_g1: vpu_g1@38300000 { + /* ... */ + interrupts = ; + interrupt-names = "irq_hantro"; + /* ... */ + power-domains = <&vpu_g1_pd>; + }; -- 2.21.0