linux-kernel - Re: [PATCH 2/4] pinctrl: qcom: spmi-gpio: Fix the GPIO strength mapping

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Date:   Thu, 8 Sep 2022 16:52:10 -0700
From:   Anjelique Melendez <quic_amelende@...cinc.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <agross@...nel.org>, <bjorn.andersson@...aro.org>,
        <linus.walleij@...aro.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>
CC:     <konrad.dybcio@...ainline.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-gpio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Anirudh Ghayal <quic_aghayal@...cinc.com>
Subject: Re: [PATCH 2/4] pinctrl: qcom: spmi-gpio: Fix the GPIO strength
 mapping



On 9/8/2022 4:14 AM, Krzysztof Kozlowski wrote:
> On 07/09/2022 22:15, Anjelique Melendez wrote:
>> From: Anirudh Ghayal <quic_aghayal@...cinc.com>
>>
>> The SPMI based PMICs have the HIGH and LOW GPIO output
>> strength mappings interchanged, fix them.
>>
>> Keep the mapping same for older SSBI based PMICs.
>>
>> CRs-Fixed: 2246473
> 
> What is this tag about?
Forgot to remove this tag before up streamed. Will remove for next version.
> 
>> Signed-off-by: Anirudh Ghayal <quic_aghayal@...cinc.com>
>> Signed-off-by: Anjelique Melendez <quic_amelende@...cinc.com>
>> ---
>>  drivers/pinctrl/qcom/pinctrl-spmi-gpio.c     | 2 +-
>>  drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c     | 4 ++--
>>  include/dt-bindings/pinctrl/qcom,pmic-gpio.h | 9 +++++++--
>>  3 files changed, 10 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
>> index cf6b6047de8d..fceccf1ec099 100644
>> --- a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
>> +++ b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
>> @@ -525,7 +525,7 @@ static int pmic_gpio_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
>>  			pad->pullup = arg;
>>  			break;
>>  		case PMIC_GPIO_CONF_STRENGTH:
>> -			if (arg > PMIC_GPIO_STRENGTH_LOW)
>> +			if (arg > PMIC_GPIO_STRENGTH_HIGH)
>>  				return -EINVAL;
>>  			pad->strength = arg;
>>  			break;
>> diff --git a/drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c b/drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c
>> index 1b41adda8129..0f96d130813b 100644
>> --- a/drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c
>> +++ b/drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c
>> @@ -1,7 +1,7 @@
>>  // SPDX-License-Identifier: GPL-2.0-only
>>  /*
>>   * Copyright (c) 2015, Sony Mobile Communications AB.
>> - * Copyright (c) 2013, The Linux Foundation. All rights reserved.
>> + * Copyright (c) 2013, 2018 The Linux Foundation. All rights reserved.
>>   */
>>  
>>  #include <linux/module.h>
>> @@ -371,7 +371,7 @@ static int pm8xxx_pin_config_set(struct pinctrl_dev *pctldev,
>>  			banks |= BIT(0);
>>  			break;
>>  		case PM8XXX_QCOM_DRIVE_STRENGH:
>> -			if (arg > PMIC_GPIO_STRENGTH_LOW) {
>> +			if (arg > PM8921_GPIO_STRENGTH_LOW) {
>>  				dev_err(pctrl->dev, "invalid drive strength\n");
>>  				return -EINVAL;
>>  			}
>> diff --git a/include/dt-bindings/pinctrl/qcom,pmic-gpio.h b/include/dt-bindings/pinctrl/qcom,pmic-gpio.h
>> index e5df5ce45a0f..950be952ad3e 100644
>> --- a/include/dt-bindings/pinctrl/qcom,pmic-gpio.h
>> +++ b/include/dt-bindings/pinctrl/qcom,pmic-gpio.h
> 
> You cannot mix bindings with driver. This is an ABI break.
Ack - Will separate into two changes.
>> @@ -12,9 +12,14 @@
>>  #define PMIC_GPIO_PULL_UP_1P5_30	3
>>  
>>  #define PMIC_GPIO_STRENGTH_NO		0
>> -#define PMIC_GPIO_STRENGTH_HIGH		1
>> +#define PMIC_GPIO_STRENGTH_LOW		1
>>  #define PMIC_GPIO_STRENGTH_MED		2
>> -#define PMIC_GPIO_STRENGTH_LOW		3
>> +#define PMIC_GPIO_STRENGTH_HIGH		3
> 
> Didn't you just break all DTSes in the world?
Ack - lol. Next version will include changes to update any DTS
that uses PMIC_GPIO_STRENGTH_ 
> 
> Best regards,
> Krzysztof

Thanks,
Anjelique