linux-kernel - Re: [PATCH 3/3] nvmem: core: Fix a conflict between MTD and NVMEM on wp-gpios property

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Date:   Wed, 26 Jan 2022 12:08:38 +0100
From:   Christophe Kerello <christophe.kerello@...s.st.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        <miquel.raynal@...tlin.com>, <richard@....at>, <vigneshr@...com>,
        <robh+dt@...nel.org>
CC:     <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <devicetree@...r.kernel.org>, <chenshumin86@...a.com>
Subject: Re: [PATCH 3/3] nvmem: core: Fix a conflict between MTD and NVMEM on
 wp-gpios property

Hi Srinivas, Miquel,

On 1/25/22 11:44, Srinivas Kandagatla wrote:
> 
> 
> On 05/01/2022 13:57, Christophe Kerello wrote:
>> diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
>> index e765d3d0542e..e11c74db64f9 100644
>> --- a/drivers/nvmem/core.c
>> +++ b/drivers/nvmem/core.c
>> @@ -769,7 +769,7 @@ struct nvmem_device *nvmem_register(const struct 
>> nvmem_config *config)
>>       if (config->wp_gpio)
>>           nvmem->wp_gpio = config->wp_gpio;
>> -    else
>> +    else if (config->reg_write)
> This is clearly not going to work for everyone.
> 
> A flag in nvmem_config to indicate that wp gpio is managed by provider 
> driver would be the right thing to do here.

Based on your inputs, I will add a new boolean flag in nvmen_config 
(proposal name: skip_wp_gpio) and I will set it to true in mtdcore.c 
when nvmen_config structure is initialized. It will be part of the V2.

Regards,
Christophe Kerello.

>>           nvmem->wp_gpio = gpiod_get_optional(config->dev, "wp",
>>                               GPIOD_OUT_HIGH);
> 
> --srini
>