linux-kernel - Re: [PATCH v4 6/7] ARM: dts: meson8: switch to new bindings for UART nodes

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Message-ID: <CAFBinCBNhRtt8jiY+19_B-9_mNmB800rvD+rwBzYNfB5pXM53Q@mail.gmail.com>
Date:   Sun, 11 Jun 2017 22:18:54 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     gregkh@...uxfoundation.org, khilman@...libre.com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        hgkr.klein@...il.com, linux-serial@...r.kernel.org,
        linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 6/7] ARM: dts: meson8: switch to new bindings for UART nodes

On Sat, Jun 10, 2017 at 12:37 AM, Martin Blumenstingl
<martin.blumenstingl@...glemail.com> wrote:
> Hi Neil,
>
> On Fri, Jun 9, 2017 at 11:49 AM, Neil Armstrong <narmstrong@...libre.com> wrote:
>> Switch to the stable UART bindings by adding a XTAL node and using the
>> proper compatible strings.
> unfortunately this won't apply now that Kevin has merged my "ARM: dts:
> meson8: add and use the real clock controller"
> on the other hand this will make the patch easier as you can now do
> the same changes as in meson8b.dtsi
Neil, if you want you could also drop this from your series and let me
handle this (just let me know). I would even go one step further and
export the CLKID_UART0, CLKID_UART1 and CLKID_UART2 gates and pass
them as "pclk" for uart_{A,B,C}
I'll even *try* to test if this works on real hardware (my Meson8m2
board has a RTL8723BS SDIO wifi + bluetooth chip - wifi driver support
has been pretty bad so far - but I'll try to see if I can get and
messages out of the bluetooth part)
just let me know if you want me to handle this patch for you

>> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
>> ---
>>  arch/arm/boot/dts/meson8.dtsi | 23 +++++++++++++++++++----
>>  1 file changed, 19 insertions(+), 4 deletions(-)
>>
>> diff --git a/arch/arm/boot/dts/meson8.dtsi b/arch/arm/boot/dts/meson8.dtsi
>> index 6993077..a2ea112 100644
>> --- a/arch/arm/boot/dts/meson8.dtsi
>> +++ b/arch/arm/boot/dts/meson8.dtsi
>> @@ -83,6 +83,13 @@
>>                 };
>>         };
>>
>> +       xtal: xtal-clk {
>> +               compatible = "fixed-clock";
>> +               clock-frequency = <24000000>;
>> +               clock-output-names = "xtal";
>> +               #clock-cells = <0>;
>> +       };
>> +
>>         clk81: clk@0 {
>>                 #clock-cells = <0>;
>>                 compatible = "fixed-clock";
>> @@ -199,17 +206,25 @@
>>  };
>>
>>  &uart_AO {
>> -       clocks = <&clk81>;
>> +       compatible = "amlogic,meson8-uart", "amlogic,meson-ao-uart";
>> +       clocks = <&xtal>, <&clk81>, <&clk81>;
>> +       clock-names = "xtal", "pclk", "baud";
>>  };
>>
>>  &uart_A {
>> -       clocks = <&clk81>;
>> +       compatible = "amlogic,meson8-uart";
>> +       clocks = <&xtal>, <&clk81>, <&clk81>;
>> +       clock-names = "xtal", "pclk", "baud";
>>  };
>>
>>  &uart_B {
>> -       clocks = <&clk81>;
>> +       compatible = "amlogic,meson8-uart";
>> +       clocks = <&xtal>, <&clk81>, <&clk81>;
>> +       clock-names = "xtal", "pclk", "baud";
>>  };
>>
>>  &uart_C {
>> -       clocks = <&clk81>;
>> +       compatible = "amlogic,meson8-uart";
>> +       clocks = <&xtal>, <&clk81>, <&clk81>;
>> +       clock-names = "xtal", "pclk", "baud";
>>  };
>> --
>> 1.9.1
>>
>>
>> _______________________________________________
>> linux-amlogic mailing list
>> linux-amlogic@...ts.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-amlogic

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