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Date: Tue, 5 Oct 2021 22:25:24 +0200 (CEST)
From: Mark Kettenis <mark.kettenis@...all.nl>
To: Hector Martin <marcan@...can.st>
Cc: linux-arm-kernel@...ts.infradead.org, marcan@...can.st,
maz@...nel.org, robh+dt@...nel.org, arnd@...nel.org,
linus.walleij@...aro.org, alyssa@...enzweig.io, krzk@...nel.org,
gregkh@...uxfoundation.org, p.zabel@...gutronix.de,
rafael@...nel.org, devicetree@...r.kernel.org,
linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-samsung-soc@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH 5/7] arm64: dts: apple: t8103: Add the UART PMGR tree
> From: Hector Martin <marcan@...can.st>
> Date: Wed, 6 Oct 2021 00:59:21 +0900
> Content-Type: text/plain; charset="us-ascii"
>
> Note that the UART driver does not currently support runtime-pm, so this
> effectively always keeps the UART0 device on. However, this does clockgate
> all the other UARTs, as those are not currently instantiated.
>
> Signed-off-by: Hector Martin <marcan@...can.st>
> ---
> arch/arm64/boot/dts/apple/t8103.dtsi | 116 +++++++++++++++++++++++++++
> 1 file changed, 116 insertions(+)
Reviewed-by: Mark Kettenis <kettenis@...nbsd.org>
> diff --git a/arch/arm64/boot/dts/apple/t8103.dtsi b/arch/arm64/boot/dts/apple/t8103.dtsi
> index 9f60f9e48ea0..63056ddc7ef7 100644
> --- a/arch/arm64/boot/dts/apple/t8103.dtsi
> +++ b/arch/arm64/boot/dts/apple/t8103.dtsi
> @@ -122,6 +122,7 @@ serial0: serial@...200000 {
> */
> clocks = <&clkref>, <&clkref>;
> clock-names = "uart", "clk_uart_baud0";
> + power-domains = <&ps_uart0>;
> status = "disabled";
> };
>
> @@ -131,5 +132,120 @@ aic: interrupt-controller@...100000 {
> interrupt-controller;
> reg = <0x2 0x3b100000 0x0 0x8000>;
> };
> +
> + pmgr: power-management@...700000 {
> + compatible = "apple,t8103-pmgr", "apple,pmgr", "syscon", "simple-mfd";
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + reg = <0x2 0x3b700000 0x0 0x14000>;
> +
> + ps_sio_busif: power-controller@1c0 {
> + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
> + reg = <0x1c0>;
> + #power-domain-cells = <0>;
> + #reset-cells = <0>;
> + apple,domain-name = "sio_busif";
> + };
> +
> + ps_sio: power-controller@1c8 {
> + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
> + reg = <0x1c8>;
> + #power-domain-cells = <0>;
> + #reset-cells = <0>;
> + apple,domain-name = "sio";
> + power-domains = <&ps_sio_busif>;
> + };
> +
> + ps_uart_p: power-controller@220 {
> + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
> + reg = <0x220>;
> + #power-domain-cells = <0>;
> + #reset-cells = <0>;
> + apple,domain-name = "uart_p";
> + power-domains = <&ps_sio>;
> + };
> +
> + ps_uart0: power-controller@270 {
> + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
> + reg = <0x270>;
> + #power-domain-cells = <0>;
> + #reset-cells = <0>;
> + apple,domain-name = "uart0";
> + power-domains = <&ps_uart_p>;
> + };
> +
> + ps_uart1: power-controller@278 {
> + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
> + reg = <0x278>;
> + #power-domain-cells = <0>;
> + #reset-cells = <0>;
> + apple,domain-name = "uart1";
> + power-domains = <&ps_uart_p>;
> + };
> +
> + ps_uart2: power-controller@280 {
> + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
> + reg = <0x280>;
> + #power-domain-cells = <0>;
> + #reset-cells = <0>;
> + apple,domain-name = "uart2";
> + power-domains = <&ps_uart_p>;
> + };
> +
> + ps_uart3: power-controller@288 {
> + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
> + reg = <0x288>;
> + #power-domain-cells = <0>;
> + #reset-cells = <0>;
> + apple,domain-name = "uart3";
> + power-domains = <&ps_uart_p>;
> + };
> +
> + ps_uart4: power-controller@290 {
> + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
> + reg = <0x290>;
> + #power-domain-cells = <0>;
> + #reset-cells = <0>;
> + apple,domain-name = "uart4";
> + power-domains = <&ps_uart_p>;
> + };
> +
> + ps_uart5: power-controller@298 {
> + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
> + reg = <0x298>;
> + #power-domain-cells = <0>;
> + #reset-cells = <0>;
> + apple,domain-name = "uart5";
> + power-domains = <&ps_uart_p>;
> + };
> +
> + ps_uart6: power-controller@2a0 {
> + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
> + reg = <0x2a0>;
> + #power-domain-cells = <0>;
> + #reset-cells = <0>;
> + apple,domain-name = "uart6";
> + power-domains = <&ps_uart_p>;
> + };
> +
> + ps_uart7: power-controller@2a8 {
> + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
> + reg = <0x2a8>;
> + #power-domain-cells = <0>;
> + #reset-cells = <0>;
> + apple,domain-name = "uart7";
> + power-domains = <&ps_uart_p>;
> + };
> +
> + ps_uart8: power-controller@2b0 {
> + compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
> + reg = <0x2b0>;
> + #power-domain-cells = <0>;
> + #reset-cells = <0>;
> + apple,domain-name = "uart8";
> + power-domains = <&ps_uart_p>;
> + };
> + };
> };
> };
> --
> 2.33.0
>
>
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