linux-kernel - Re: [PATCH v2] ARM: mxs: Add serial number support for i.MX23, i.MX28 SoCs

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Message-ID: <20201130093238.GE4072@dragon>
Date:   Mon, 30 Nov 2020 17:32:39 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Ivan Zaentsev <ivan.zaentsev@...enboard.ru>
Cc:     Russell King <linux@...linux.org.uk>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Evgeny Boger <boger@...enboard.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] ARM: mxs: Add serial number support for i.MX23,
 i.MX28 SoCs

On Mon, Nov 16, 2020 at 07:58:26PM +0300, Ivan Zaentsev wrote:
> i.MX23 and i.MX28 SoCs unique identifiers are factory-programmed
> in On-Chip OTP memory. i.MX28's 64-bit unique id is in
> HW_OCOTP_OPS2:HW_OCOTP_OPS3 (see MCIMX28 Ref. Man., sec. 20.4.22-23).
> 
> i.MX23 provides 32-bit long unique id in HW_OCOTP_OPS3.
> Though not clearly documented, there is a clue in sec. 35.9.3.
> 
> The unique id is reported in /sys/devices/soc0/serial_number
> and in /proc/cpuinfo
> 
> Signed-off-by: Ivan Zaentsev <ivan.zaentsev@...enboard.ru>
> Suggested-by: Evgeny Boger <boger@...enboard.com>

Applied, thanks.