linux-kernel - Re: [PATCH v8 5/6] arm64: dts: marvell: armada-37xx: add device node for UART clock and use it

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Date:   Mon, 14 Feb 2022 16:46:25 +0100
From:   Gregory CLEMENT <gregory.clement@...tlin.com>
To:     Marek Behún <kabel@...nel.org>,
        Pali Rohár <pali@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-clk@...r.kernel.org, linux-serial@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Marek Behún <kabel@...nel.org>
Subject: Re: [PATCH v8 5/6] arm64: dts: marvell: armada-37xx: add device
 node for UART clock and use it

Hello Marek and Pali,

> From: Pali Rohár <pali@...nel.org>
>
> Define DT node for UART clock "marvell,armada-3700-uart-clock" and use
> this UART clock as a base clock for all UART devices.
>
> Signed-off-by: Pali Rohár <pali@...nel.org>
> Reviewed-by: Marek Behún <kabel@...nel.org>
> Signed-off-by: Marek Behún <kabel@...nel.org>

Acked-by: Gregory CLEMENT <gregory.clement@...tlin.com>

However for keeping bisectability we have to ensure that this patch will
be applied after the drivers changes.

Thanks,

Gregory


> ---
> Changes since v7:
> - changed commit message ("This change defines" -> "Define")
> - added Marek's Reviewed-by tag
> ---
>  arch/arm64/boot/dts/marvell/armada-37xx.dtsi | 14 ++++++++++++--
>  1 file changed, 12 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
> index 673f4906eef9..4cf6c8aa0ac2 100644
> --- a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
> +++ b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
> @@ -132,10 +132,20 @@ avs: avs@...00 {
>  				reg = <0x11500 0x40>;
>  			};
>  
> +			uartclk: clock-controller@...10 {
> +				compatible = "marvell,armada-3700-uart-clock";
> +				reg = <0x12010 0x4>, <0x12210 0x4>;
> +				clocks = <&tbg 0>, <&tbg 1>, <&tbg 2>,
> +					 <&tbg 3>, <&xtalclk>;
> +				clock-names = "TBG-A-P", "TBG-B-P", "TBG-A-S",
> +					      "TBG-B-S", "xtal";
> +				#clock-cells = <1>;
> +			};
> +
>  			uart0: serial@...00 {
>  				compatible = "marvell,armada-3700-uart";
>  				reg = <0x12000 0x18>;
> -				clocks = <&xtalclk>;
> +				clocks = <&uartclk 0>;
>  				interrupts =
>  				<GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>,
>  				<GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>,
> @@ -147,7 +157,7 @@ uart0: serial@...00 {
>  			uart1: serial@...00 {
>  				compatible = "marvell,armada-3700-uart-ext";
>  				reg = <0x12200 0x30>;
> -				clocks = <&xtalclk>;
> +				clocks = <&uartclk 1>;
>  				interrupts =
>  				<GIC_SPI 30 IRQ_TYPE_EDGE_RISING>,
>  				<GIC_SPI 31 IRQ_TYPE_EDGE_RISING>;
> -- 
> 2.34.1
>

-- 
Gregory Clement, Bootlin
Embedded Linux and Kernel engineering
http://bootlin.com