linux-kernel - Re: [PATCH v8 11/11] arm64: dts: meson: a1: introduce PLL and Peripherals clk controllers

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Date:   Fri, 2 Dec 2022 14:37:52 +0100
From:   neil.armstrong@...aro.org
To:     Jerome Brunet <jbrunet@...libre.com>,
        Dmitry Rokosov <ddrokosov@...rdevices.ru>,
        mturquette@...libre.com, sboyd@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, khilman@...libre.com,
        martin.blumenstingl@...glemail.com
Cc:     jian.hu@...ogic.com, kernel@...rdevices.ru, rockosov@...il.com,
        linux-amlogic@...ts.infradead.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v8 11/11] arm64: dts: meson: a1: introduce PLL and
 Peripherals clk controllers

On 02/12/2022 13:03, Jerome Brunet wrote:
> 
> On Fri 02 Dec 2022 at 01:57, Dmitry Rokosov <ddrokosov@...rdevices.ru> wrote:
> 
>> This patch adds clkc_periphs and clkc_pll dts nodes to A1 SoC main dtsi.
>> The first one clk controller is responsible for all SoC peripherals
>> clocks excluding audio clocks. The second one clk controller is used by
>> A1 SoC PLLs. Actually, there are two different APB heads, so we have two
>> different drivers.
> 
> Please send this change through a separate patcheset.
> 
> One patcheset/series for clk (and bindings)
> Another one for the DTS (usually sent after the first one is accepted)

Yes please split out the DT in a separate patchset, but only send then once
the bindings are fully reviewed and accepted.

Start from v1 for the DT patchset, no need to continue the current numbering.

Thanks,
Neil

> 
>>
>> Signed-off-by: Dmitry Rokosov <ddrokosov@...rdevices.ru>
>> ---
>>   arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 27 ++++++++++++++++++++++-
>>   1 file changed, 26 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
>> index b4000cf65a9a..38e6517c603c 100644
>> --- a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
>> +++ b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
>> @@ -6,6 +6,8 @@
>>   #include <dt-bindings/interrupt-controller/irq.h>
>>   #include <dt-bindings/interrupt-controller/arm-gic.h>
>>   #include <dt-bindings/gpio/meson-a1-gpio.h>
>> +#include <dt-bindings/clock/a1-pll-clkc.h>
>> +#include <dt-bindings/clock/a1-clkc.h>
>>   
>>   / {
>>   	compatible = "amlogic,a1";
>> @@ -81,7 +83,6 @@ apb: bus@...00000 {
>>   			#size-cells = <2>;
>>   			ranges = <0x0 0x0 0x0 0xfe000000 0x0 0x1000000>;
>>   
>> -
>>   			reset: reset-controller@0 {
>>   				compatible = "amlogic,meson-a1-reset";
>>   				reg = <0x0 0x0 0x0 0x8c>;
>> @@ -124,6 +125,30 @@ uart_AO_B: serial@...0 {
>>   				clock-names = "xtal", "pclk", "baud";
>>   				status = "disabled";
>>   			};
>> +
>> +			clkc_periphs: periphs-clock-controller@800 {
> 
> device name should be generic so
> 
> clkc_periphs: clock-controller@800 would be better
> 
>> +				compatible = "amlogic,a1-periphs-clkc";
>> +				reg = <0 0x800 0 0x104>;
>> +				#clock-cells = <1>;
>> +				clocks = <&clkc_pll CLKID_FCLK_DIV2>,
>> +					 <&clkc_pll CLKID_FCLK_DIV3>,
>> +					 <&clkc_pll CLKID_FCLK_DIV5>,
>> +					 <&clkc_pll CLKID_FCLK_DIV7>,
>> +					 <&clkc_pll CLKID_HIFI_PLL>,
>> +					 <&xtal>;
>> +				clock-names = "fclk_div2", "fclk_div3",
>> +					      "fclk_div5", "fclk_div7",
>> +					      "hifi_pll", "xtal";
>> +			};
>> +
>> +			clkc_pll: pll-clock-controller@...0 {
> 
> Same here
> 
>> +				compatible = "amlogic,a1-pll-clkc";
>> +				reg = <0 0x7c80 0 0x18c>;
>> +				#clock-cells = <1>;
>> +				clocks = <&clkc_periphs CLKID_XTAL_FIXPLL>,
>> +					 <&clkc_periphs CLKID_XTAL_HIFIPLL>;
>> +				clock-names = "xtal_fixpll", "xtal_hifipll";
>> +			};
>>   		};
>>   
>>   		gic: interrupt-controller@...01000 {
>