diff mbox

[01/10] ARM: shmobile: sh7372: Update DTS to include CPU frequency

Message ID 20140820130210.32075.68195.sendpatchset@w520 (mailing list archive)
State Accepted
Commit 2340cd112933ee837aa83017a6da23c72565d501
Headers show

Commit Message

Magnus Damm Aug. 20, 2014, 1:02 p.m. UTC
From: Magnus Damm <damm+renesas@opensource.se>

Add CPU Frequency information to the sh7372 DTS file. This
will allow us to use the shared C code on sh7372 and Mackerel
which reads out the clock frequency from DT and calculates the
delay settings from there.

Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
---

 arch/arm/boot/dts/sh7372.dtsi |    1 +
 1 file changed, 1 insertion(+)

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Comments

Geert Uytterhoeven Aug. 20, 2014, 2:36 p.m. UTC | #1
Hi Magnus,

On Wed, Aug 20, 2014 at 3:02 PM, Magnus Damm <magnus.damm@gmail.com> wrote:
> Add CPU Frequency information to the sh7372 DTS file. This
> will allow us to use the shared C code on sh7372 and Mackerel
> which reads out the clock frequency from DT and calculates the
> delay settings from there.
>
> Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
> ---
>
>  arch/arm/boot/dts/sh7372.dtsi |    1 +
>  1 file changed, 1 insertion(+)
>
> --- 0001/arch/arm/boot/dts/sh7372.dtsi
> +++ work/arch/arm/boot/dts/sh7372.dtsi  2014-08-20 21:00:26.000000000 +0900
> @@ -21,6 +21,7 @@
>                         compatible = "arm,cortex-a8";
>                         device_type = "cpu";
>                         reg = <0x0>;
> +                       clock-frequency = <800000000>;

Should this be overridden in sh7372-mackerel.dtsi?

While the sh7372 manual states 800 MHz, the Mackerel manual states
806 MHz.

>                 };
>         };

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

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when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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Magnus Damm Aug. 20, 2014, 2:42 p.m. UTC | #2
Hi Geert,

On Wed, Aug 20, 2014 at 11:36 PM, Geert Uytterhoeven
<geert@linux-m68k.org> wrote:
> Hi Magnus,
>
> On Wed, Aug 20, 2014 at 3:02 PM, Magnus Damm <magnus.damm@gmail.com> wrote:
>> Add CPU Frequency information to the sh7372 DTS file. This
>> will allow us to use the shared C code on sh7372 and Mackerel
>> which reads out the clock frequency from DT and calculates the
>> delay settings from there.
>>
>> Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
>> ---
>>
>>  arch/arm/boot/dts/sh7372.dtsi |    1 +
>>  1 file changed, 1 insertion(+)
>>
>> --- 0001/arch/arm/boot/dts/sh7372.dtsi
>> +++ work/arch/arm/boot/dts/sh7372.dtsi  2014-08-20 21:00:26.000000000 +0900
>> @@ -21,6 +21,7 @@
>>                         compatible = "arm,cortex-a8";
>>                         device_type = "cpu";
>>                         reg = <0x0>;
>> +                       clock-frequency = <800000000>;
>
> Should this be overridden in sh7372-mackerel.dtsi?
>
> While the sh7372 manual states 800 MHz, the Mackerel manual states
> 806 MHz.

I guess overriding makes sense for boards that operate out of spec... =/

For sh7372 this isn't really used by anything except the generic
(broken) DT case, so Mackerel legacy case doesn't care at this point.

Looking forward to throw sh7372 support out of the window. =)

/ magnus
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diff mbox

Patch

--- 0001/arch/arm/boot/dts/sh7372.dtsi
+++ work/arch/arm/boot/dts/sh7372.dtsi	2014-08-20 21:00:26.000000000 +0900
@@ -21,6 +21,7 @@ 
 			compatible = "arm,cortex-a8";
 			device_type = "cpu";
 			reg = <0x0>;
+			clock-frequency = <800000000>;
 		};
 	};