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Subject: Re: [PATCH v2 02/10] ARM: dts: stm32: Add Engicam MicroGEA STM32MP1
 SoM
To:     Jagan Teki <jagan@amarulasolutions.com>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
        Alexandre Torgue <alexandre.torgue@st.com>,
        "Rob Herring" <robh+dt@kernel.org>
CC:     <devicetree@vger.kernel.org>,
        Matteo Lisi <matteo.lisi@engicam.com>,
        Francesco Utel <francesco.utel@engicam.com>,
        <linux-kernel@vger.kernel.org>,
        Mirko Ardinghi <mirko.ardinghi@engicam.com>,
        <linux-amarula@amarulasolutions.com>,
        <linux-stm32@st-md-mailman.stormreply.com>,
        <linux-arm-kernel@lists.infradead.org>
References: <20210226070304.8028-1-jagan@amarulasolutions.com>
 <20210226070304.8028-3-jagan@amarulasolutions.com>
From:   Alexandre TORGUE <alexandre.torgue@foss.st.com>
Message-ID: <611bce6f-7adb-f0b5-0c9b-d5d7bb8b90fb@foss.st.com>
Date:   Fri, 26 Feb 2021 17:11:43 +0100
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Hi Jagan

On 2/26/21 8:02 AM, Jagan Teki wrote:
> MicroGEA STM32MP1 is an EDIMM SoM based on STM32MP157A from Engicam.
> 
> General features:
> - STM32MP157AAC
> - Up to 1GB DDR3L-800
> - 512MB Nand flash
> - I2S
> 
> MicroGEA STM32MP1 needs to mount on top of Engicam MicroDev carrier
> boards for creating complete platform solutions.
> 
> Add support for it.
> 
> Signed-off-by: Matteo Lisi <matteo.lisi@engicam.com>
> Signed-off-by: Francesco Utel <francesco.utel@engicam.com>
> Signed-off-by: Mirko Ardinghi <mirko.ardinghi@engicam.com>
> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

Minor question: if the stm32mp157 is soldered on Microdev boards why do 
you mention it in this commit message ?

+ a minor comment bellow.

thanks
Alex

> ---
> Changes for v2:
> - none
> 
>   .../dts/stm32mp157a-microgea-stm32mp1.dtsi    | 147 ++++++++++++++++++
>   1 file changed, 147 insertions(+)
>   create mode 100644 arch/arm/boot/dts/stm32mp157a-microgea-stm32mp1.dtsi
> 
> diff --git a/arch/arm/boot/dts/stm32mp157a-microgea-stm32mp1.dtsi b/arch/arm/boot/dts/stm32mp157a-microgea-stm32mp1.dtsi
> new file mode 100644
> index 000000000000..97d569107bfe
> --- /dev/null
> +++ b/arch/arm/boot/dts/stm32mp157a-microgea-stm32mp1.dtsi
> @@ -0,0 +1,147 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
> +/*
> + * Copyright (c) STMicroelectronics 2019 - All Rights Reserved
> + * Copyright (c) 2020 Engicam srl
> + * Copyright (c) 2020 Amarula Solutons(India)
> + */
> +
> +/ {
> +	compatible = "engicam,microgea-stm32mp1", "st,stm32mp157";
> +
> +	memory@c0000000 {

you could add 		device_type = "memory";


> +		reg = <0xc0000000 0x10000000>;
> +	};
> +
> +	reserved-memory {
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		ranges;
> +
> +		mcuram2: mcuram2@10000000 {
> +			compatible = "shared-dma-pool";
> +			reg = <0x10000000 0x40000>;
> +			no-map;
> +		};
> +
> +		vdev0vring0: vdev0vring0@10040000 {
> +			compatible = "shared-dma-pool";
> +			reg = <0x10040000 0x1000>;
> +			no-map;
> +		};
> +
> +		vdev0vring1: vdev0vring1@10041000 {
> +			compatible = "shared-dma-pool";
> +			reg = <0x10041000 0x1000>;
> +			no-map;
> +		};
> +
> +		vdev0buffer: vdev0buffer@10042000 {
> +			compatible = "shared-dma-pool";
> +			reg = <0x10042000 0x4000>;
> +			no-map;
> +		};
> +
> +		mcuram: mcuram@30000000 {
> +			compatible = "shared-dma-pool";
> +			reg = <0x30000000 0x40000>;
> +			no-map;
> +		};
> +
> +		retram: retram@38000000 {
> +			compatible = "shared-dma-pool";
> +			reg = <0x38000000 0x10000>;
> +			no-map;
> +		};
> +	};
> +
> +	vin: regulator-vin {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vin";
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +		regulator-always-on;
> +	};
> +
> +	vddcore: regulator-vddcore {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vddcore";
> +		regulator-min-microvolt = <1200000>;
> +		regulator-max-microvolt = <1200000>;
> +		regulator-always-on;
> +		vin-supply = <&vin>;
> +	};
> +
> +	vdd: regulator-vdd {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vdd";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-always-on;
> +		vin-supply = <&vin>;
> +	};
> +
> +	vddq_ddr: regulator-vddq-ddr {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vddq_ddr";
> +		regulator-min-microvolt = <1350000>;
> +		regulator-max-microvolt = <1350000>;
> +		regulator-always-on;
> +		vin-supply = <&vin>;
> +	};
> +};
> +
> +&dts {
> +	status = "okay";
> +};
> +
> +&fmc {
> +	pinctrl-names = "default", "sleep";
> +	pinctrl-0 = <&fmc_pins_a>;
> +	pinctrl-1 = <&fmc_sleep_pins_a>;
> +	status = "okay";
> +
> +	nand-controller@4,0 {
> +		status = "okay";
> +
> +		nand@0 {
> +			reg = <0>;
> +			nand-on-flash-bbt;
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +		};
> +	};
> +};
> +
> +&ipcc {
> +	status = "okay";
> +};
> +
> +&iwdg2{
> +	timeout-sec = <32>;
> +	status = "okay";
> +};
> +
> +&m4_rproc{
> +	memory-region = <&retram>, <&mcuram>, <&mcuram2>, <&vdev0vring0>,
> +			<&vdev0vring1>, <&vdev0buffer>;
> +	mboxes = <&ipcc 0>, <&ipcc 1>, <&ipcc 2>;
> +	mbox-names = "vq0", "vq1", "shutdown";
> +	interrupt-parent = <&exti>;
> +	interrupts = <68 1>;
> +	status = "okay";
> +};
> +
> +&rng1 {
> +	status = "okay";
> +};
> +
> +&rtc{
> +	status = "okay";
> +};
> +
> +&vrefbuf {
> +	regulator-min-microvolt = <2500000>;
> +	regulator-max-microvolt = <2500000>;
> +	vdda-supply = <&vdd>;
> +	status = "okay";
> +};
>