linux-kernel - Re: [PATCH 1/2] dts: hisilicon: add support for the PMIC found on Hikey 970

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Message-ID: <60FE57B5.2010603@hisilicon.com>
Date:   Mon, 26 Jul 2021 14:35:33 +0800
From:   Wei Xu <xuwei5@...ilicon.com>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
CC:     <linuxarm@...wei.com>, <mauro.chehab@...wei.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, "xuwei (O)" <xuwei5@...wei.com>
Subject: Re: [PATCH 1/2] dts: hisilicon: add support for the PMIC found on
 Hikey 970

Hi Mauro,

On 2021/7/26 14:19, Mauro Carvalho Chehab wrote:
> Em Mon, 26 Jul 2021 10:40:44 +0800
> Wei Xu <xuwei5@...ilicon.com> escreveu:
> 
>> Hi Mauro,
>>
>> On 2021/7/24 16:55, Mauro Carvalho Chehab wrote:
>>> Add a device tree for the HiSilicon 6421v600 SPMI PMIC, used
>>> on HiKey970 board.
>>>
>>> As we now have support for it, change the fixed regulators
>>> used by the SD I/O to use the proper LDO supplies.
>>>
>>> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
>>> ---
>>>  .../boot/dts/hisilicon/hi3670-hikey970.dts    | 22 +----
>>>  .../boot/dts/hisilicon/hikey970-pmic.dtsi     | 86 +++++++++++++++++++
>>>  2 files changed, 89 insertions(+), 19 deletions(-)
>>>  create mode 100644 arch/arm64/boot/dts/hisilicon/hikey970-pmic.dtsi
>>>
>>> diff --git a/arch/arm64/boot/dts/hisilicon/hi3670-hikey970.dts b/arch/arm64/boot/dts/hisilicon/hi3670-hikey970.dts
>>> index d8abf442ee7e..7c32f5fd5cc5 100644
>>> --- a/arch/arm64/boot/dts/hisilicon/hi3670-hikey970.dts
>>> +++ b/arch/arm64/boot/dts/hisilicon/hi3670-hikey970.dts
>>> @@ -12,6 +12,7 @@
>>>  
>>>  #include "hi3670.dtsi"
>>>  #include "hikey970-pinctrl.dtsi"
>>> +#include "hikey970-pmic.dtsi"
>>>  
>>>  / {
>>>  	model = "HiKey970";
>>> @@ -39,23 +40,6 @@ memory@0 {
>>>  		reg = <0x0 0x0 0x0 0x0>;
>>>  	};
>>>  
>>> -	sd_1v8: regulator-1v8 {
>>> -		compatible = "regulator-fixed";
>>> -		regulator-name = "fixed-1.8V";
>>> -		regulator-min-microvolt = <1800000>;
>>> -		regulator-max-microvolt = <1800000>;
>>> -		regulator-always-on;
>>> -	};
>>> -
>>> -	sd_3v3: regulator-3v3 {
>>> -		compatible = "regulator-fixed";
>>> -		regulator-name = "fixed-3.3V";
>>> -		regulator-min-microvolt = <3300000>;
>>> -		regulator-max-microvolt = <3300000>;
>>> -		regulator-boot-on;
>>> -		regulator-always-on;
>>> -	};
>>> -
>>>  	wlan_en: wlan-en-1-8v {
>>>  		compatible = "regulator-fixed";
>>>  		regulator-name = "wlan-en-regulator";
>>> @@ -402,8 +386,8 @@ &dwmmc1 {
>>>  	pinctrl-0 = <&sd_pmx_func
>>>  		     &sd_clk_cfg_func  
>>>  		     &sd_cfg_func>;  
>>> -	vmmc-supply = <&sd_3v3>;
>>> -	vqmmc-supply = <&sd_1v8>;
>>> +	vmmc-supply = <&ldo16>;
>>> +	vqmmc-supply = <&ldo9>;
>>>  	status = "okay";
>>>  };
>>>  
>>> diff --git a/arch/arm64/boot/dts/hisilicon/hikey970-pmic.dtsi b/arch/arm64/boot/dts/hisilicon/hikey970-pmic.dtsi
>>> new file mode 100644
>>> index 000000000000..970047f2dabd
>>> --- /dev/null
>>> +++ b/arch/arm64/boot/dts/hisilicon/hikey970-pmic.dtsi
>>> @@ -0,0 +1,86 @@
>>> +// SPDX-License-Identifier: GPL-2.0
>>> +/*
>>> + * dts file for Hi6421v600 SPMI PMIC used at the HiKey970 Development Board
>>> + *
>>> + * Copyright (C) 2020, Huawei Tech. Co., Ltd.
>>> + */
>>> +
>>> +#include <dt-bindings/spmi/spmi.h>
>>> +
>>> +/ {
>>> +	spmi: spmi@...24000 {
>>> +		compatible = "hisilicon,kirin970-spmi-controller";
>>> +		#address-cells = <2>;
>>> +		#size-cells = <0>;
>>> +		status = "okay";
>>> +		reg = <0x0 0xfff24000 0x0 0x1000>;
>>> +		hisilicon,spmi-channel = <2>;
>>> +
>>> +		pmic: pmic@0 {
>>> +			compatible = "hisilicon,hi6421-spmi";  
>>
>> Should this be "hisilicon,hi6421-pmic" which is already in the binding document "mfd/hi6421.txt"?
>> Others are OK to me.
> 
> No. 
> 
> hisilicon,hi6421-pmic is used by this driver
> 	drivers/mfd/hi6421-pmic-core.c
> 
> which provides support for the Hi6421 variants that don't use a MIPI
> SPMI bus.
> 
> The "hisilicon,hi6421-spmi" compatible is for the new driver:
> 	drivers/mfd/hi6421-spmi-pmic.c
> 
> And it is defined at:
> 	Documentation/devicetree/bindings/mfd/hisilicon,hi6421-spmi-pmic.yaml
> 
> Both DT bindings and the driver were promoted from staging on this patch:
> 
> 	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git/commit/?h=staging-next&id=9bd9e0de1cf5b89c4854be505ac0a418ddcc01bf

Got it. Thanks for your kind explanation!
So I am fine with this patch.
Do you need my ack now or later I can merge it once it is out of staging.

Best Regards,
Wei

> 
> Regards,
> Mauro
> .
>