linux-kernel - Re: [PATCH 5.10 212/717] platform/x86: mlx-platform: Remove PSU EEPROM from MSN274x platform configuration

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Date:   Tue, 29 Dec 2020 12:01:44 -0700
From:   Nathan Chancellor <natechancellor@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Vadim Pasternak <vadimp@...dia.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Sasha Levin <sashal@...nel.org>
Subject: Re: [PATCH 5.10 212/717] platform/x86: mlx-platform: Remove PSU
 EEPROM from MSN274x platform configuration

On Mon, Dec 28, 2020 at 01:43:30PM +0100, Greg Kroah-Hartman wrote:
> From: Vadim Pasternak <vadimp@...dia.com>
> 
> [ Upstream commit 912b341585e302ee44fc5a2733f7bcf505e2c86f ]
> 
> Remove PSU EEPROM configuration for systems class equipped with
> Mellanox chip Spectrum and ATOM CPU - system types MSN274x. Till now
> all the systems from this class used few types of power units, all
> equipped with EEPROM device with address space two bytes. Thus, all
> these devices have been handled by EEPROM driver "24c02".
> 
> There is a new requirement is to support power unit replacement by "off
> the shelf" device, matching electrical required parameters. Such device
> can be equipped with different EEPROM type, which could be one byte
> address space addressing or even could be not equipped with EEPROM.
> In such case "24c02" will not work.
> 
> Fixes: ef08e14a3 ("platform/x86: mlx-platform: Add support for new msn274x system type")
> Signed-off-by: Vadim Pasternak <vadimp@...dia.com>
> Link: https://lore.kernel.org/r/20201125101056.174708-3-vadimp@nvidia.com
> Signed-off-by: Hans de Goede <hdegoede@...hat.com>
> Signed-off-by: Sasha Levin <sashal@...nel.org>
> ---
>  drivers/platform/x86/mlx-platform.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/platform/x86/mlx-platform.c b/drivers/platform/x86/mlx-platform.c
> index 623e7f737d4ab..598f445587649 100644
> --- a/drivers/platform/x86/mlx-platform.c
> +++ b/drivers/platform/x86/mlx-platform.c
> @@ -601,15 +601,13 @@ static struct mlxreg_core_data mlxplat_mlxcpld_msn274x_psu_items_data[] = {
>  		.label = "psu1",
>  		.reg = MLXPLAT_CPLD_LPC_REG_PSU_OFFSET,
>  		.mask = BIT(0),
> -		.hpdev.brdinfo = &mlxplat_mlxcpld_psu[0],
> -		.hpdev.nr = MLXPLAT_CPLD_PSU_MSNXXXX_NR,
> +		.hpdev.nr = MLXPLAT_CPLD_NR_NONE,
>  	},
>  	{
>  		.label = "psu2",
>  		.reg = MLXPLAT_CPLD_LPC_REG_PSU_OFFSET,
>  		.mask = BIT(1),
> -		.hpdev.brdinfo = &mlxplat_mlxcpld_psu[1],
> -		.hpdev.nr = MLXPLAT_CPLD_PSU_MSNXXXX_NR,
> +		.hpdev.nr = MLXPLAT_CPLD_NR_NONE,
>  	},
>  };
>  
> -- 
> 2.27.0
> 
> 
> 

Please pick up eca6ba20f38c ("platform/x86: mlx-platform: remove an
unused variable") everywhere that this patch was applied to avoid
introducing a new clang warning.

Cheers,
Nathan