linux-kernel - Re: [PATCH v4 7/7] ARM: dts: meson8b: switch to new bindings for UART nodes

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Message-ID: <1497260879.3086.13.camel@baylibre.com>
Date:   Mon, 12 Jun 2017 11:47:59 +0200
From:   Jerome Brunet <jbrunet@...libre.com>
To:     Neil Armstrong <narmstrong@...libre.com>,
        gregkh@...uxfoundation.org, khilman@...libre.com
Cc:     hgkr.klein@...il.com, linux-serial@...r.kernel.org,
        linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v4 7/7] ARM: dts: meson8b: switch to new bindings for
 UART nodes

On Fri, 2017-06-09 at 11:49 +0200, Neil Armstrong wrote:
> Switch to the stable UART bindings by adding a XTAL node and using the
> proper compatible strings.
> 
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> ---
>  arch/arm/boot/dts/meson8b.dtsi | 23 +++++++++++++++++++----
>  1 file changed, 19 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/meson8b.dtsi b/arch/arm/boot/dts/meson8b.dtsi
> index d9f116a..651ad4a 100644
> --- a/arch/arm/boot/dts/meson8b.dtsi
> +++ b/arch/arm/boot/dts/meson8b.dtsi
> @@ -82,6 +82,13 @@
>  			reg = <0x203>;
>  		};
>  	};
> +
> +	xtal: xtal-clk {
> +		compatible = "fixed-clock";
> +		clock-frequency = <24000000>;
> +		clock-output-names = "xtal";
> +		#clock-cells = <0>;
> +	};

On meson8b, I think xtal is already provided by <&clkc CLKID_XTAL>.
We have to choose which one we want.

With this handled:

Acked-by: Jerome Brunet <jbrunet@...libre.com>

>  }; /* end of / */
>  
>  &aobus {
> @@ -178,17 +185,25 @@
>  };
>  
>  &uart_AO {
> -	clocks = <&clkc CLKID_CLK81>;
> +	compatible = "amlogic,meson8b-uart", "amlogic,meson-ao-uart";
> +	clocks = <&xtal>, <&clkc CLKID_CLK81>, <&clkc CLKID_CLK81>;
> +	clock-names = "xtal", "pclk", "baud";
>  };
>  
>  &uart_A {
> -	clocks = <&clkc CLKID_CLK81>;
> +	compatible = "amlogic,meson8b-uart";
> +	clocks = <&xtal>, <&clkc CLKID_CLK81>, <&clkc CLKID_CLK81>;
> +	clock-names = "xtal", "pclk", "baud";
>  };
>  
>  &uart_B {
> -	clocks = <&clkc CLKID_CLK81>;
> +	compatible = "amlogic,meson8b-uart";
> +	clocks = <&xtal>, <&clkc CLKID_CLK81>, <&clkc CLKID_CLK81>;
> +	clock-names = "xtal", "pclk", "baud";
>  };
>  
>  &uart_C {
> -	clocks = <&clkc CLKID_CLK81>;
> +	compatible = "amlogic,meson8b-uart";
> +	clocks = <&xtal>, <&clkc CLKID_CLK81>, <&clkc CLKID_CLK81>;
> +	clock-names = "xtal", "pclk", "baud";
>  };