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Date: Mon, 28 Mar 2022 14:26:59 +0200
From: Matthias Brugger <matthias.bgg@...il.com>
To: Tinghan Shen <tinghan.shen@...iatek.com>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
Linus Walleij <linus.walleij@...aro.org>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Bartosz Golaszewski <bgolaszewski@...libre.com>,
Sean Wang <sean.wang@...iatek.com>,
Chaotian Jing <chaotian.jing@...iatek.com>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org,
Project_Global_Chrome_Upstream_Group@...iatek.com,
ryder.lee@...nel.org, wenst@...omium.org,
chunfeng.yun@...iatek.com, Seiya Wang <seiya.wang@...iatek.com>
Subject: Re: [PATCH v11 3/3] arm64: dts: Add mediatek SoC mt8195 and
evaluation board
On 16/02/2022 12:31, Tinghan Shen wrote:
> Add basic chip support for mediatek mt8195.
>
> Signed-off-by: Seiya Wang <seiya.wang@...iatek.com>
> Signed-off-by: Tinghan Shen <tinghan.shen@...iatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
> arch/arm64/boot/dts/mediatek/Makefile | 1 +
> arch/arm64/boot/dts/mediatek/mt8195-evb.dts | 161 +++
> arch/arm64/boot/dts/mediatek/mt8195.dtsi | 1049 +++++++++++++++++++
> 3 files changed, 1211 insertions(+)
> create mode 100644 arch/arm64/boot/dts/mediatek/mt8195-evb.dts
> create mode 100644 arch/arm64/boot/dts/mediatek/mt8195.dtsi
>
> diff --git a/arch/arm64/boot/dts/mediatek/Makefile b/arch/arm64/boot/dts/mediatek/Makefile
> index 8c1e18032f9f..5da29e7223e4 100644
> --- a/arch/arm64/boot/dts/mediatek/Makefile
> +++ b/arch/arm64/boot/dts/mediatek/Makefile
> @@ -38,4 +38,5 @@ dtb-$(CONFIG_ARCH_MEDIATEK) += mt8183-kukui-krane-sku0.dtb
> dtb-$(CONFIG_ARCH_MEDIATEK) += mt8183-kukui-krane-sku176.dtb
> dtb-$(CONFIG_ARCH_MEDIATEK) += mt8183-pumpkin.dtb
> dtb-$(CONFIG_ARCH_MEDIATEK) += mt8192-evb.dtb
> +dtb-$(CONFIG_ARCH_MEDIATEK) += mt8195-evb.dtb
> dtb-$(CONFIG_ARCH_MEDIATEK) += mt8516-pumpkin.dtb
> diff --git a/arch/arm64/boot/dts/mediatek/mt8195-evb.dts b/arch/arm64/boot/dts/mediatek/mt8195-evb.dts
> new file mode 100644
> index 000000000000..51633d91d984
> --- /dev/null
> +++ b/arch/arm64/boot/dts/mediatek/mt8195-evb.dts
> @@ -0,0 +1,161 @@
[...]
> +
> +&u2port0 {
> + status = "okay";
> +};
> +
> +&u2port1 {
> + status = "okay";
> +};
> +
> +&u3phy0 {
> + status="okay";
> +};
> +
> +&u3phy1 {
> + status="okay";
> +};
> +
So we enable phys for xhci but not the device. Are we missing anything to enable
them on the EVB?
> +&uart0 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&uart0_pin>;
> + status = "okay";
> +};
> diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> new file mode 100644
> index 000000000000..a363e82f6988
> --- /dev/null
> +++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> @@ -0,0 +1,1049 @@
[...]
> +
> + clk32k: oscillator-32k {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + clock-frequency = <32768>;
> + clock-output-names = "clk32k";
I suppose the 32KHz oscillator is really present on the board also not used by
any device (up to now?).
[...]
> +
> + soc {
> + #address-cells = <2>;
> + #size-cells = <2>;
> + compatible = "simple-bus";
> + ranges;
> +
[...]
> +
> + pwrap: pwrap@...24000 {
> + compatible = "mediatek,mt8195-pwrap", "syscon";
> + reg = <0 0x10024000 0 0x1000>;
> + reg-names = "pwrap";
> + interrupts = <GIC_SPI 243 IRQ_TYPE_LEVEL_HIGH 0>;
> + clocks = <&infracfg_ao CLK_INFRA_AO_PMIC_AP>,
> + <&infracfg_ao CLK_INFRA_AO_PMIC_TMR>;
> + clock-names = "spi", "wrap";
Binding mandates resets but not present here. It also mandates two register
regions, but only one is given here.
> + assigned-clocks = <&topckgen CLK_TOP_PWRAP_ULPOSC>;
> + assigned-clock-parents = <&topckgen CLK_TOP_ULPOSC1_D10>;
> + };
> +
> + scp_adsp: clock-controller@...20000 {
> + compatible = "mediatek,mt8195-scp_adsp";
> + reg = <0 0x10720000 0 0x1000>;
> + #clock-cells = <1>;
> + };
> +
[...]
> +
> + mmc0: mmc@...30000 {
> + compatible = "mediatek,mt8195-mmc",
> + "mediatek,mt8183-mmc";
> + reg = <0 0x11230000 0 0x10000>,
> + <0 0x11f50000 0 0x1000>;
Seems to be an oversight when adding support for mt8183-mmc support to the
driver. The binding description is missing the optional host top register base.
Chaotian can you please help to fix this in the binding description.
> + interrupts = <GIC_SPI 131 IRQ_TYPE_LEVEL_HIGH 0>;
> + clocks = <&topckgen CLK_TOP_MSDC50_0>,
> + <&infracfg_ao CLK_INFRA_AO_MSDC0>,
> + <&infracfg_ao CLK_INFRA_AO_MSDC0_SRC>;
> + clock-names = "source", "hclk", "source_cg";
> + status = "disabled";
> + };
> +
[...]
> +
> + xhci3: usb@...b0000 {
> + compatible = "mediatek,mt8195-xhci",
> + "mediatek,mtk-xhci";
> + reg = <0 0x112b0000 0 0x1000>,
> + <0 0x112b3e00 0 0x0100>;
> + reg-names = "mac", "ippc";
> + interrupts = <GIC_SPI 536 IRQ_TYPE_LEVEL_HIGH 0>;
> + phys = <&u2port3 PHY_TYPE_USB2>;
> + assigned-clocks = <&topckgen CLK_TOP_USB_TOP_3P>,
> + <&topckgen CLK_TOP_SSUSB_XHCI_3P>;
> + assigned-clock-parents = <&topckgen CLK_TOP_UNIVPLL_D5_D4>,
> + <&topckgen CLK_TOP_UNIVPLL_D5_D4>;
> + clocks = <&pericfg_ao CLK_PERI_AO_SSUSB_3P_BUS>,
> + <&topckgen CLK_TOP_SSUSB_P3_REF>,
> + <&pericfg_ao CLK_PERI_AO_SSUSB_3P_XHCI>;
> + clock-names = "sys_ck", "ref_ck", "xhci_ck";
> + /* This controller is connected with a BT device.
> + * Disable usb2 lpm to prevent konwn issues.
> + */
> + usb2-lpm-disable;
My understanding is, that this depends on the board and not the SoC. Which means
usb2-lpm-disable should go into any board that has a BT device connected to the
xhci device (I don't see any active xhci node in mt8195-evb so far).
Regards,
Matthias
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