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Date: Tue, 12 Nov 2019 09:16:38 +0100
From: Markus Reichl <m.reichl@...etechno.de>
To: Kever Yang <kever.yang@...k-chips.com>, Soeren Moch <smoch@....de>,
heiko@...ech.de
Cc: Mark Rutland <mark.rutland@....com>,
Andrius Štikonas <andrius@...konas.eu>,
linux-kernel@...r.kernel.org, Alexis Ballier <aballier@...too.org>,
linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
Katsuhiro Suzuki <katsuhiro@...suster.net>,
Hugh Cole-Baker <sigmaris@...il.com>,
Elaine Zhang <zhangqing@...k-chips.com>,
Andy Yan <andyshrk@...il.com>,
Robin Murphy <robin.murphy@....com>,
Vicente Bergas <vicencb@...il.com>,
Oskari Lemmela <oskari@...mela.net>,
linux-rockchip@...ts.infradead.org,
Rob Herring <robh+dt@...nel.org>,
Pragnesh Patel <Pragnesh_Patel@...tor.com>,
Peter Robinson <pbrobinson@...il.com>,
Nick Xie <nick@...das.com>,
Ezequiel Garcia <ezequiel@...labora.com>,
Vivek Unune <npcomplete13@...il.com>,
Akash Gajjar <akash@...nedev.com>
Subject: Re: [PATCH 3/3] arm64: dts: rk3399: Add init voltage for vdd_log
Hi Kever,
have a rk3399-roc-pc running mainline U-Boot and kernel and vdd_log is
showing 1118 mV.
Is this a danger for the board?
How to fix it?
Btw. vin-supply for this pwm-regulator is ignored and I could not find it
in bindings doc.
Gruß,
--
Markus Reichl
Am 12.11.19 um 09:04 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?
>
>
> 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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