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Date: Wed, 13 Nov 2019 11:21:35 +0800
From: Kever Yang <kever.yang@...k-chips.com>
To: Heiko Stübner <heiko@...ech.de>
Cc: Soeren Moch <smoch@....de>, linux-rockchip@...ts.infradead.org,
Elaine Zhang <zhangqing@...k-chips.com>,
Peter Robinson <pbrobinson@...il.com>,
Akash Gajjar <akash@...nedev.com>,
Alexis Ballier <aballier@...too.org>,
Andrius Štikonas <andrius@...konas.eu>,
Andy Yan <andyshrk@...il.com>,
Ezequiel Garcia <ezequiel@...labora.com>,
Hugh Cole-Baker <sigmaris@...il.com>,
Katsuhiro Suzuki <katsuhiro@...suster.net>,
Mark Rutland <mark.rutland@....com>,
Nick Xie <nick@...das.com>,
Oskari Lemmela <oskari@...mela.net>,
Pragnesh Patel <Pragnesh_Patel@...tor.com>,
Rob Herring <robh+dt@...nel.org>,
Robin Murphy <robin.murphy@....com>,
Vicente Bergas <vicencb@...il.com>,
Vivek Unune <npcomplete13@...il.com>,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, dianders@...omium.org
Subject: Re: [PATCH 3/3] arm64: dts: rk3399: Add init voltage for vdd_log
Heiko,
Could you help to just pick the first patch and drop the other 2
patches?
I think it's better to fix in the U-Boot first so that the
stability issue will be fixed,
and the update in kernel dts is not so urgent for kernel driver actually
not setting
this pwm regulator.
I want to add a patch for rk3399-roc-pc, since Markus Reichl
already send it,
so it's OK for that board, and for rock960/Ficus, the vdd_log is removed
for stability
issue, then we have to update U-Boot first before kernel can add the
vdd_log back.
Thanks,
- Kever
On 2019/11/12 下午4:10, Heiko Stübner wrote:
> Hi Kever,
>
> Am Dienstag, 12. November 2019, 09:04:49 CET schrieb Kever Yang:
>> On 2019/11/11 下午4:42, Soeren Moch wrote:
>>> On 11.11.19 01:51, Kever Yang wrote:
>>>> Since there is no devfreq used for vdd_log, so the vdd_log(pwm regulator)
>>>> will be 'enable' with the dts node at a default PWM state with high or low
>>>> output. Both too high or too low for vdd_log is not good for the board,
>>>> add init voltage for driver to make the regulator get into a know output.
>>>>
>>>> Note that this will be used by U-Boot for init voltage output, and this
>>>> is very important for it may get system hang somewhere during system
>>>> boot up with regulator enable and without this init value.
>>> I think it's a good idea to include this setting in the main dts for the
>>> boards (not in u-boot specific additions as is done now). But there is
>>> (for some reason?) no documented binding for regulator-init-microvolt in
>>> linux.
>>
>> Ohh, I forgot the kernel driver does not support this property.
>>
>> @Heiko, can we add this 'regulator-init-microvolt' without driver
>> support but adding document for
>>
>> it at dt-binding?
> In theory yes, but you would still need to get DT maintainers
> and Mark Brown (regulator maintainer) involved before that.
>
> Especially as this is a individual property you will need to have
> a good excuse why you're not implementing it in the kernel as well.
>
> And of course you will need to keep in mind that it might be
> in the kernel in the future.
>
>
> Heiko
>
>
>
>>
>> Thanks,
>>
>> - Kever
>>
>>> Regards,
>>> Soeren
>>>> CC: Elaine Zhang <zhangqing@...k-chips.com>
>>>> CC: Peter Robinson <pbrobinson@...il.com>
>>>> Signed-off-by: Kever Yang <kever.yang@...k-chips.com>
>>>> ---
>>>>
>>>> arch/arm64/boot/dts/rockchip/rk3399-evb.dts | 1 +
>>>> arch/arm64/boot/dts/rockchip/rk3399-firefly.dts | 1 +
>>>> arch/arm64/boot/dts/rockchip/rk3399-hugsun-x99.dts | 1 +
>>>> arch/arm64/boot/dts/rockchip/rk3399-khadas-edge.dtsi | 1 +
>>>> arch/arm64/boot/dts/rockchip/rk3399-leez-p710.dts | 1 +
>>>> arch/arm64/boot/dts/rockchip/rk3399-orangepi.dts | 1 +
>>>> arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dts | 1 +
>>>> arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts | 1 +
>>>> arch/arm64/boot/dts/rockchip/rk3399-sapphire.dtsi | 1 +
>>>> 9 files changed, 9 insertions(+)
>>>>
>>>> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-evb.dts b/arch/arm64/boot/dts/rockchip/rk3399-evb.dts
>>>> index 77008dca45bc..fa241aeb11b0 100644
>>>> --- a/arch/arm64/boot/dts/rockchip/rk3399-evb.dts
>>>> +++ b/arch/arm64/boot/dts/rockchip/rk3399-evb.dts
>>>> @@ -65,6 +65,7 @@
>>>> regulator-name = "vdd_center";
>>>> regulator-min-microvolt = <800000>;
>>>> regulator-max-microvolt = <1400000>;
>>>> + regulator-init-microvolt = <950000>;
>>>> regulator-always-on;
>>>> regulator-boot-on;
>>>> status = "okay";
>>>> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-firefly.dts b/arch/arm64/boot/dts/rockchip/rk3399-firefly.dts
>>>> index 92de83dd4dbc..4e45269fcdff 100644
>>>> --- a/arch/arm64/boot/dts/rockchip/rk3399-firefly.dts
>>>> +++ b/arch/arm64/boot/dts/rockchip/rk3399-firefly.dts
>>>> @@ -208,6 +208,7 @@
>>>> regulator-boot-on;
>>>> regulator-min-microvolt = <430000>;
>>>> regulator-max-microvolt = <1400000>;
>>>> + regulator-init-microvolt = <950000>;
>>>> vin-supply = <&vcc_sys>;
>>>> };
>>>> };
>>>> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-hugsun-x99.dts b/arch/arm64/boot/dts/rockchip/rk3399-hugsun-x99.dts
>>>> index c133e8d64b2a..692f3154edc3 100644
>>>> --- a/arch/arm64/boot/dts/rockchip/rk3399-hugsun-x99.dts
>>>> +++ b/arch/arm64/boot/dts/rockchip/rk3399-hugsun-x99.dts
>>>> @@ -100,6 +100,7 @@
>>>> regulator-name = "vdd_log";
>>>> regulator-min-microvolt = <800000>;
>>>> regulator-max-microvolt = <1400000>;
>>>> + regulator-init-microvolt = <950000>;
>>>> regulator-always-on;
>>>> regulator-boot-on;
>>>> };
>>>> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-khadas-edge.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-khadas-edge.dtsi
>>>> index 4944d78a0a1c..c2ac80d99301 100644
>>>> --- a/arch/arm64/boot/dts/rockchip/rk3399-khadas-edge.dtsi
>>>> +++ b/arch/arm64/boot/dts/rockchip/rk3399-khadas-edge.dtsi
>>>> @@ -79,6 +79,7 @@
>>>> regulator-boot-on;
>>>> regulator-min-microvolt = <800000>;
>>>> regulator-max-microvolt = <1400000>;
>>>> + regulator-init-microvolt = <950000>;
>>>> vin-supply = <&vsys_3v3>;
>>>> };
>>>>
>>>> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-leez-p710.dts b/arch/arm64/boot/dts/rockchip/rk3399-leez-p710.dts
>>>> index 73be38a53796..c32abcc4ddc1 100644
>>>> --- a/arch/arm64/boot/dts/rockchip/rk3399-leez-p710.dts
>>>> +++ b/arch/arm64/boot/dts/rockchip/rk3399-leez-p710.dts
>>>> @@ -101,6 +101,7 @@
>>>> regulator-boot-on;
>>>> regulator-min-microvolt = <800000>;
>>>> regulator-max-microvolt = <1400000>;
>>>> + regulator-init-microvolt = <950000>;
>>>> vin-supply = <&vcc5v0_sys>;
>>>> };
>>>> };
>>>> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-orangepi.dts b/arch/arm64/boot/dts/rockchip/rk3399-orangepi.dts
>>>> index 0541dfce924d..9d674c51f025 100644
>>>> --- a/arch/arm64/boot/dts/rockchip/rk3399-orangepi.dts
>>>> +++ b/arch/arm64/boot/dts/rockchip/rk3399-orangepi.dts
>>>> @@ -164,6 +164,7 @@
>>>> regulator-boot-on;
>>>> regulator-min-microvolt = <800000>;
>>>> regulator-max-microvolt = <1400000>;
>>>> + regulator-init-microvolt = <950000>;
>>>> vin-supply = <&vcc_sys>;
>>>> };
>>>> };
>>>> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dts b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dts
>>>> index 19f7732d728c..7d856ce1d156 100644
>>>> --- a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dts
>>>> +++ b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dts
>>>> @@ -129,6 +129,7 @@
>>>> regulator-boot-on;
>>>> regulator-min-microvolt = <800000>;
>>>> regulator-max-microvolt = <1400000>;
>>>> + regulator-init-microvolt = <950000>;
>>>> vin-supply = <&vcc3v3_sys>;
>>>> };
>>>> };
>>>> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts
>>>> index e544deb61d28..8fbccbc8bf47 100644
>>>> --- a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts
>>>> +++ b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dts
>>>> @@ -174,6 +174,7 @@
>>>> regulator-boot-on;
>>>> regulator-min-microvolt = <800000>;
>>>> regulator-max-microvolt = <1700000>;
>>>> + regulator-init-microvolt = <950000>;
>>>> vin-supply = <&vcc5v0_sys>;
>>>> };
>>>> };
>>>> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-sapphire.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-sapphire.dtsi
>>>> index 1bc1579674e5..f8e2cb8c0624 100644
>>>> --- a/arch/arm64/boot/dts/rockchip/rk3399-sapphire.dtsi
>>>> +++ b/arch/arm64/boot/dts/rockchip/rk3399-sapphire.dtsi
>>>> @@ -133,6 +133,7 @@
>>>> regulator-boot-on;
>>>> regulator-min-microvolt = <800000>;
>>>> regulator-max-microvolt = <1400000>;
>>>> + regulator-init-microvolt = <950000>;
>>>> vin-supply = <&vcc_sys>;
>>>> };
>>>> };
>>
>>
>
>
>
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