linux-kernel - Re: [PATCH v2] mmc: add wp_grp

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Date: Tue, 19 Dec 2023 11:55:30 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Bo Ye <bo.ye@...iatek.com>, avri.altman@....com,
 dominique.martinet@...ark-techno.com, rafael.beims@...adex.com,
 vincent.whitchurch@...s.com, Ulf Hansson <ulf.hansson@...aro.org>,
 Matthias Brugger <matthias.bgg@...il.com>
Cc: yongdong.zhang@...iatek.com, "lin.gui" <lin.gui@...iatek.com>,
 linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v2] mmc: add wp_grp_size node

Il 19/12/23 00:05, Bo Ye ha scritto:
> From: "lin.gui" <lin.gui@...iatek.com>
> 
> Detail:
> Add node "wp_grp_size", corresponding to WP_GRP_SIZE
> (write protect group size) of eMMC's CSD register.
> 
> Scenario:
> The eMMC card can be set into write-protected mode to
> prevent data from being accidentally modified or deleted.
> Wp_grp_size (Write Protect Group Size) refers to an
> attribute of the eMMC card, used to manage write protection,
> and is the CSD register  [36:32] of the eMMC device.
> Wp_grp_size (Write Protect Group Size) indicates how many
> eMMC blocks are contained in each write protection group on the eMMC card.
> 
> Final rendered file:
> "/sys/class/mmc_host/mmc0/mmc0:0001/wp_grp_size"
> 
> Signed-off-by: Lin Gui <lin.gui@...iatek.com>
> Signed-off-by: Bo Ye <bo.ye@...iatek.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>