Re: [PATCH v1 6/8] arm64: dts: verdin-imx8mp: add pcie support

From: Shawn Guo <shawnguo@kernel.org>
To: Marcel Ziswiler <marcel@ziswiler.com>
Cc: linux-arm-kernel@lists.infradead.org,
	Marcel Ziswiler <marcel.ziswiler@toradex.com>,
	Fabio Estevam <festevam@gmail.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Max Krummenacher <max.krummenacher@toradex.com>,
	NXP Linux Team <linux-imx@nxp.com>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Philippe Schenker <philippe.schenker@toradex.com>,
	Rob Herring <robh+dt@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 6/8] arm64: dts: verdin-imx8mp: add pcie support
Date: Sun, 23 Oct 2022 21:12:32 +0800	[thread overview]
Message-ID: <20221023131232.GN125525@dragon> (raw)
In-Reply-To: <20220922162925.2368577-7-marcel@ziswiler.com>

On Thu, Sep 22, 2022 at 06:29:23PM +0200, Marcel Ziswiler wrote:
> From: Marcel Ziswiler <marcel.ziswiler@toradex.com>
> 
> Add PCIe support on the Verdin iMX8M Plus.
> 
> Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
> 
> ---
> This still relies on the PHY part landing [1] and the internal SYSPLL
> mode getting sorted [2].
> 
> [1] https://lore.kernel.org/all/1663659498-5180-1-git-send-email-hongxing.zhu@nxp.com/
> [2] https://lore.kernel.org/all/AS8PR04MB867657D03C61774096A5A1628C4C9@AS8PR04MB8676.eurprd04.prod.outlook.com/

Are these dependencies already landed on v6.1-rc1?

Shawn

> 
>  .../dts/freescale/imx8mp-verdin-dahlia.dtsi   |  9 +++++++-
>  .../boot/dts/freescale/imx8mp-verdin.dtsi     | 22 ++++++++++++++++++-
>  2 files changed, 29 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-verdin-dahlia.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-verdin-dahlia.dtsi
> index 4b8f86f63081..60f9dc4847db 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp-verdin-dahlia.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-verdin-dahlia.dtsi
> @@ -67,7 +67,14 @@ &i2c4 {
>  	/* TODO: Audio Codec */
>  };
>  
> -/* TODO: Verdin PCIE_1 */
> +/* Verdin PCIE_1 */
> +&pcie {
> +	status = "okay";
> +};
> +
> +&pcie_phy {
> +	status = "okay";
> +};
>  
>  /* Verdin PWM_1 */
>  &pwm1 {
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
> index 7be7e922927b..160bb32cb5f7 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
> @@ -734,7 +734,27 @@ eeprom_carrier_board: eeprom@57 {
>  	};
>  };
>  
> -/* TODO: Verdin PCIE_1 */
> +/* Verdin PCIE_1 */
> +&pcie {
> +	assigned-clocks = <&clk IMX8MP_CLK_PCIE_AUX>;
> +	assigned-clock-parents = <&clk IMX8MP_SYS_PLL2_50M>;
> +	assigned-clock-rates = <10000000>;
> +	clocks = <&clk IMX8MP_CLK_HSIO_ROOT>,
> +		 <&clk IMX8MP_CLK_PCIE_ROOT>,
> +		 <&clk IMX8MP_CLK_HSIO_AXI>;
> +	clock-names = "pcie", "pcie_aux", "pcie_bus";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_pcie>;
> +	/* PCIE_1_RESET# (SODIMM 244) */
> +	reset-gpio = <&gpio4 19 GPIO_ACTIVE_LOW>;
> +};
> +
> +&pcie_phy {
> +	clocks = <&clk IMX8MP_CLK_HSIO_ROOT>;
> +	clock-names = "ref";
> +	fsl,clkreq-unsupported;
> +	fsl,refclk-pad-mode = <IMX8_PCIE_REFCLK_PAD_OUTPUT>;
> +};
>  
>  /* Verdin PWM_1 */
>  &pwm1 {
> -- 
> 2.36.1
> 

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