linux-kernel - [PATCH 9/9] ARM: imx: Add serial number support for i.MX7D

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Message-Id: <1572232370-31580-10-git-send-email-Anson.Huang@nxp.com>
Date:   Mon, 28 Oct 2019 11:12:50 +0800
From:   Anson Huang <Anson.Huang@....com>
To:     linux@...linux.org.uk, shawnguo@...nel.org, s.hauer@...gutronix.de,
        kernel@...gutronix.de, festevam@...il.com, aisheng.dong@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Linux-imx@....com
Subject: [PATCH 9/9] ARM: imx: Add serial number support for i.MX7D

i.MX7D has a 64-bit SoC unique ID stored in OCOTP, it can be used
as SoC serial number, see below example:

root@...7dsabresd:~# cat /sys/devices/soc0/serial_number
0000028FF618B953

Signed-off-by: Anson Huang <Anson.Huang@....com>
---
 arch/arm/mach-imx/cpu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-imx/cpu.c b/arch/arm/mach-imx/cpu.c
index 17cfa86..d811803 100644
--- a/arch/arm/mach-imx/cpu.c
+++ b/arch/arm/mach-imx/cpu.c
@@ -160,6 +160,7 @@ struct device * __init imx_soc_device_init(void)
 		soc_id = "i.MX6SLL";
 		break;
 	case MXC_CPU_IMX7D:
+		ocotp_compat = "fsl,imx7d-ocotp";
 		soc_id = "i.MX7D";
 		break;
 	case MXC_CPU_IMX7ULP:
-- 
2.7.4