Re: [PATCH v7 5/5] arm64: dts: imx8m: Add ddr controller nodes

From: Shawn Guo <shawnguo@kernel.org>
To: Leonard Crestez <leonard.crestez@nxp.com>
Cc: "Stephen Boyd" <sboyd@kernel.org>,
	"Chanwoo Choi" <cw00.choi@samsung.com>,
	"Rob Herring" <robh+dt@kernel.org>,
	"MyungJoo Ham" <myungjoo.ham@samsung.com>,
	"Kyungmin Park" <kyungmin.park@samsung.com>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	"Mark Rutland" <mark.rutland@arm.com>,
	"Michael Turquette" <mturquette@baylibre.com>,
	"Artur Świgoń" <a.swigon@partner.samsung.com>,
	"Saravana Kannan" <saravanak@google.com>,
	"Angus Ainslie" <angus@akkea.ca>,
	"Martin Kepplinger" <martink@posteo.de>,
	"Matthias Kaehlcke" <mka@chromium.org>,
	"Krzysztof Kozlowski" <krzk@kernel.org>,
	"Alexandre Bailon" <abailon@baylibre.com>,
	"Georgi Djakov" <georgi.djakov@linaro.org>,
	"Dong Aisheng" <aisheng.dong@nxp.com>,
	"Abel Vesa" <abel.vesa@nxp.com>, "Jacky Bai" <ping.bai@nxp.com>,
	"Anson Huang" <Anson.Huang@nxp.com>,
	"Fabio Estevam" <fabio.estevam@nxp.com>,
	"Viresh Kumar" <viresh.kumar@linaro.org>,
	"Silvano di Ninno" <silvano.dininno@nxp.com>,
	devicetree@vger.kernel.org, linux-pm@vger.kernel.org,
	linux-clk@vger.kernel.org, linux-imx@nxp.com,
	kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v7 5/5] arm64: dts: imx8m: Add ddr controller nodes
Date: Mon, 9 Dec 2019 09:34:15 +0800	[thread overview]
Message-ID: <20191209013414.GS3365@dragon> (raw)
In-Reply-To: <23e46c12c98947315229c20dea6784ad40d294c4.1574458460.git.leonard.crestez@nxp.com>

On Fri, Nov 22, 2019 at 11:45:04PM +0200, Leonard Crestez wrote:
> This is used by the imx-ddrc devfreq driver to implement dynamic
> frequency scaling of DRAM.
> 
> Support for proactive scaling via interconnect will come later. The
> high-performance bus masters which need that (display, vpu, gpu) are
> mostly not yet enabled in upstream anyway.
> 
> Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
> ---
>  arch/arm64/boot/dts/freescale/imx8mm-evk.dts  | 18 ++++++++++++++
>  arch/arm64/boot/dts/freescale/imx8mm.dtsi     | 10 ++++++++
>  .../boot/dts/freescale/imx8mn-ddr4-evk.dts    | 18 ++++++++++++++
>  arch/arm64/boot/dts/freescale/imx8mn.dtsi     | 10 ++++++++
>  arch/arm64/boot/dts/freescale/imx8mq-evk.dts  | 24 +++++++++++++++++++
>  arch/arm64/boot/dts/freescale/imx8mq.dtsi     | 10 ++++++++
>  6 files changed, 90 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> index 28ab17a277bb..ecf0d385c164 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> @@ -75,10 +75,28 @@
>  
>  &A53_0 {
>  	cpu-supply = <&buck2_reg>;
>  };
>  
> +&ddrc {
> +	operating-points-v2 = <&ddrc_opp_table>;
> +
> +	ddrc_opp_table: opp-table {
> +		compatible = "operating-points-v2";
> +
> +		opp-25M {
> +			opp-hz = /bits/ 64 <25000000>;
> +		};

As an idiomatic practice, we have newline between nodes.

I fixed it up and applied the patch.

Shawn

> +		opp-100M {
> +			opp-hz = /bits/ 64 <100000000>;
> +		};
> +		opp-750M {
> +			opp-hz = /bits/ 64 <750000000>;
> +		};
> +	};
> +};
> +
>  &fec1 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_fec1>;
>  	phy-mode = "rgmii-id";
>  	phy-handle = <&ethphy0>;
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
> index 6edbdfe2d0d7..3d4802375715 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
> @@ -856,10 +856,20 @@
>  			#interrupt-cells = <3>;
>  			interrupt-controller;
>  			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
>  		};
>  
> +		ddrc: memory-controller@3d400000 {
> +			compatible = "fsl,imx8mm-ddrc", "fsl,imx8m-ddrc";
> +			reg = <0x3d400000 0x400000>;
> +			clock-names = "core", "pll", "alt", "apb";
> +			clocks = <&clk IMX8MM_CLK_DRAM_CORE>,
> +				 <&clk IMX8MM_DRAM_PLL>,
> +				 <&clk IMX8MM_CLK_DRAM_ALT>,
> +				 <&clk IMX8MM_CLK_DRAM_APB>;
> +		};
> +
>  		ddr-pmu@3d800000 {
>  			compatible = "fsl,imx8mm-ddr-pmu", "fsl,imx8m-ddr-pmu";
>  			reg = <0x3d800000 0x400000>;
>  			interrupt-parent = <&gic>;
>  			interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
> diff --git a/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts b/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
> index 071949412caf..b051c927c11e 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
> @@ -15,10 +15,28 @@
>  
>  &A53_0 {
>  	cpu-supply = <&buck2_reg>;
>  };
>  
> +&ddrc {
> +	operating-points-v2 = <&ddrc_opp_table>;
> +
> +	ddrc_opp_table: opp-table {
> +		compatible = "operating-points-v2";
> +
> +		opp-25M {
> +			opp-hz = /bits/ 64 <25000000>;
> +		};
> +		opp-100M {
> +			opp-hz = /bits/ 64 <100000000>;
> +		};
> +		opp-600M {
> +			opp-hz = /bits/ 64 <600000000>;
> +		};
> +	};
> +};
> +
>  &i2c1 {
>  	pmic@4b {
>  		compatible = "rohm,bd71847";
>  		reg = <0x4b>;
>  		pinctrl-0 = <&pinctrl_pmic>;
> diff --git a/arch/arm64/boot/dts/freescale/imx8mn.dtsi b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
> index e91625063f8e..3a79fdddc72b 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
> @@ -757,10 +757,20 @@
>  			#interrupt-cells = <3>;
>  			interrupt-controller;
>  			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
>  		};
>  
> +		ddrc: memory-controller@3d400000 {
> +			compatible = "fsl,imx8mn-ddrc", "fsl,imx8m-ddrc";
> +			reg = <0x3d400000 0x400000>;
> +			clock-names = "core", "pll", "alt", "apb";
> +			clocks = <&clk IMX8MN_CLK_DRAM_CORE>,
> +				 <&clk IMX8MN_DRAM_PLL>,
> +				 <&clk IMX8MN_CLK_DRAM_ALT>,
> +				 <&clk IMX8MN_CLK_DRAM_APB>;
> +		};
> +
>  		ddr-pmu@3d800000 {
>  			compatible = "fsl,imx8mn-ddr-pmu", "fsl,imx8m-ddr-pmu";
>  			reg = <0x3d800000 0x400000>;
>  			interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
>  		};
> diff --git a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> index c36685916683..ee6dc5f07622 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
> @@ -103,10 +103,34 @@
>  
>  &A53_3 {
>  	cpu-supply = <&buck2_reg>;
>  };
>  
> +&ddrc {
> +	operating-points-v2 = <&ddrc_opp_table>;
> +
> +	ddrc_opp_table: opp-table {
> +		compatible = "operating-points-v2";
> +
> +		opp-25M {
> +			opp-hz = /bits/ 64 <25000000>;
> +		};
> +		opp-100M {
> +			opp-hz = /bits/ 64 <100000000>;
> +		};
> +		/*
> +		 * On imx8mq B0 PLL can't be bypassed so low bus is 166M
> +		 */
> +		opp-166M {
> +			opp-hz = /bits/ 64 <166935483>;
> +		};
> +		opp-800M {
> +			opp-hz = /bits/ 64 <800000000>;
> +		};
> +	};
> +};
> +
>  &fec1 {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_fec1>;
>  	phy-mode = "rgmii-id";
>  	phy-handle = <&ethphy0>;
> diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> index 7f9319452b58..d1fcf9887f8b 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
> @@ -1111,10 +1111,20 @@
>  			interrupt-controller;
>  			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
>  			interrupt-parent = <&gic>;
>  		};
>  
> +		ddrc: memory-controller@3d400000 {
> +			compatible = "fsl,imx8mq-ddrc", "fsl,imx8m-ddrc";
> +			reg = <0x3d400000 0x400000>;
> +			clock-names = "core", "pll", "alt", "apb";
> +			clocks = <&clk IMX8MQ_CLK_DRAM_CORE>,
> +				 <&clk IMX8MQ_DRAM_PLL_OUT>,
> +				 <&clk IMX8MQ_CLK_DRAM_ALT>,
> +				 <&clk IMX8MQ_CLK_DRAM_APB>;
> +		};
> +
>  		ddr-pmu@3d800000 {
>  			compatible = "fsl,imx8mq-ddr-pmu", "fsl,imx8m-ddr-pmu";
>  			reg = <0x3d800000 0x400000>;
>  			interrupt-parent = <&gic>;
>  			interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
> -- 
> 2.17.1
> 