[RESEND RFC PATCH 0/2] Add 100MHz integer multiples of cpu freq table for the RK3036

[RESEND RFC PATCH 0/2] Add 100MHz integer multiples of cpu freq table for the RK3036

[Xing Zheng]

Hi,
  We need the cpu changing freqs capability, and considering that emac
ref which is need 50MHz might is under the APLL, meanwhile, we don't
need too many freqs because it may spend more time to find the correct
freq.
  Therefore, we should add 100MHz integer multiples cpu freqs for
emac.


Xing Zheng (2):
  clk: rockchip: rk3036: Add to 100MHz integer multiples of cpu freq
    table
  ARM: dts: rockchip: Update the cpu freqs table

 arch/arm/boot/dts/rk3036.dtsi     |   13 ++++++++++++-
 drivers/clk/rockchip/clk-rk3036.c |   27 ++++++++++++++++++++++++---
 2 files changed, 36 insertions(+), 4 deletions(-)

-- 
1.7.9.5


--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[RESEND RFC PATCH 2/2] ARM: dts: rockchip: Update the cpu freqs table

[Xing Zheng]

Actually, we need more cpu freqs which are 50MHz integer multiples.

Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>
---

 arch/arm/boot/dts/rk3036.dtsi |   13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/rk3036.dtsi b/arch/arm/boot/dts/rk3036.dtsi
index 1cb5877..1a773eb 100644
--- a/arch/arm/boot/dts/rk3036.dtsi
+++ b/arch/arm/boot/dts/rk3036.dtsi
@@ -79,7 +79,18 @@
 			resets = <&cru SRST_CORE0>;
 			operating-points = <
 				/* KHz    uV */
-				 816000 1000000
+				1200000 1200000
+				1100000 1200000
+				1000000 1200000
+				 900000 1200000
+				 800000 1200000
+				 700000 1200000
+				 600000 1200000
+				 500000 1200000
+				 400000 1200000
+				 300000 1200000
+				 200000 1200000
+				 100000 1200000
 			>;
 			clock-latency = <40000>;
 			clocks = <&cru ARMCLK>;
-- 
1.7.9.5

Re: [RESEND RFC PATCH 2/2] ARM: dts: rockchip: Update the cpu freqs table

[Heiko Stuebner]

Hi Xing,

Am Freitag, 8. Januar 2016, 19:31:38 schrieb Xing Zheng:
> Actually, we need more cpu freqs which are 50MHz integer multiples.
> 
> Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>
> ---
> 
>  arch/arm/boot/dts/rk3036.dtsi |   13 ++++++++++++-
>  1 file changed, 12 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/rk3036.dtsi b/arch/arm/boot/dts/rk3036.dtsi
> index 1cb5877..1a773eb 100644
> --- a/arch/arm/boot/dts/rk3036.dtsi
> +++ b/arch/arm/boot/dts/rk3036.dtsi
> @@ -79,7 +79,18 @@
>  			resets = <&cru SRST_CORE0>;
>  			operating-points = <
>  				/* KHz    uV */
> -				 816000 1000000
> +				1200000 1200000
> +				1100000 1200000
> +				1000000 1200000
> +				 900000 1200000
> +				 800000 1200000
> +				 700000 1200000
> +				 600000 1200000
> +				 500000 1200000
> +				 400000 1200000
> +				 300000 1200000
> +				 200000 1200000
> +				 100000 1200000

what about reducing the voltage as well?

>From rk3288-specific discussions I remember that reducing the frequency 
without touching the voltage, didn't really save so much energy.
And it looks like it was running 816MHz@1.0V just fine as well.

I guess you should find out which voltages are really necessary for each 
step.


Heiko

Re: [RESEND RFC PATCH 2/2] ARM: dts: rockchip: Update the cpu freqs table

[Xing Zheng]

Hi Heiko,

On 2016年01月09日 03:16, Heiko Stuebner wrote:
> Hi Xing,
>
> Am Freitag, 8. Januar 2016, 19:31:38 schrieb Xing Zheng:
>> Actually, we need more cpu freqs which are 50MHz integer multiples.
>>
>> Signed-off-by: Xing Zheng <zhengxing-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
>> ---
>>
>>   arch/arm/boot/dts/rk3036.dtsi |   13 ++++++++++++-
>>   1 file changed, 12 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/arm/boot/dts/rk3036.dtsi b/arch/arm/boot/dts/rk3036.dtsi
>> index 1cb5877..1a773eb 100644
>> --- a/arch/arm/boot/dts/rk3036.dtsi
>> +++ b/arch/arm/boot/dts/rk3036.dtsi
>> @@ -79,7 +79,18 @@
>>   			resets = <&cru SRST_CORE0>;
>>   			operating-points = <
>>   				/* KHz    uV */
>> -				 816000 1000000
>> +				1200000 1200000
>> +				1100000 1200000
>> +				1000000 1200000
>> +				 900000 1200000
>> +				 800000 1200000
>> +				 700000 1200000
>> +				 600000 1200000
>> +				 500000 1200000
>> +				 400000 1200000
>> +				 300000 1200000
>> +				 200000 1200000
>> +				 100000 1200000
> what about reducing the voltage as well?
>
> >From rk3288-specific discussions I remember that reducing the frequency
> without touching the voltage, didn't really save so much energy.
> And it looks like it was running 816MHz@1.0V just fine as well.
>
> I guess you should find out which voltages are really necessary for each
> step.
>
>
> Heiko
>
Thank you for your comments. :-)

Yes, these patches currently still in draft stage. Modify the frequency 
of 816MHz is for mac apll patch can be FROMLIST for Kylin Board,
and will work cpu frequency table as a start.

We know you want to set the appropriate frequency of different batches 
of The RK3036 SoCs take some time,so I just tested a fixed
high voltage 1.2v on my evb board, the frequency of the voltage to 
ensure that we can work needed.
We'll start work dynamically adjust the voltage.

Thanks.

- Xing Zheng


--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html