Commit b3082f1b authored by Anson Huang's avatar Anson Huang Committed by Shawn Guo
Browse files

ARM: imx: Add i.MX7ULP SoC serial number support 



i.MX7ULP's unique ID layout in OCOTP is different from other
i.MX6/7 SoCs as below:

OCOTP layout		unique ID

0x4b0 bit[15:0]		bit[15:0]
0x4c0 bit[15:0]		bit[31:16]
0x4d0 bit[15:0]		bit[47:32]
0x4e0 bit[15:0]		bit[63:48]

Add support for reading serial number from OCOTP on i.MX7ULP.

Signed-off-by: default avatarAnson Huang <Anson.Huang@nxp.com>
Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
parent 7947e323

arch/arm/mach-imx/cpu.c

+25 −5
Original line number Diff line number Diff line
@@ -15,6 +15,11 @@ 
#define OCOTP_UID_H	0x420

#define OCOTP_UID_L	0x410



#define OCOTP_ULP_UID_1		0x4b0

#define OCOTP_ULP_UID_2		0x4c0

#define OCOTP_ULP_UID_3		0x4d0

#define OCOTP_ULP_UID_4		0x4e0



unsigned int __mxc_cpu_type;

static unsigned int imx_soc_revision;
@@ -164,6 +169,7 @@ struct device * __init imx_soc_device_init(void) 
		soc_id = "i.MX7D";

		break;

	case MXC_CPU_IMX7ULP:

		ocotp_compat = "fsl,imx7ulp-ocotp";

		soc_id = "i.MX7ULP";

		break;

	default:
@@ -178,12 +184,26 @@ struct device * __init imx_soc_device_init(void) 
	}



	if (!IS_ERR_OR_NULL(ocotp)) {

		if (__mxc_cpu_type == MXC_CPU_IMX7ULP) {

			regmap_read(ocotp, OCOTP_ULP_UID_4, &val);

			soc_uid = val & 0xffff;

			regmap_read(ocotp, OCOTP_ULP_UID_3, &val);

			soc_uid <<= 16;

			soc_uid |= val & 0xffff;

			regmap_read(ocotp, OCOTP_ULP_UID_2, &val);

			soc_uid <<= 16;

			soc_uid |= val & 0xffff;

			regmap_read(ocotp, OCOTP_ULP_UID_1, &val);

			soc_uid <<= 16;

			soc_uid |= val & 0xffff;

		} else {

			regmap_read(ocotp, OCOTP_UID_H, &val);

			soc_uid = val;

			regmap_read(ocotp, OCOTP_UID_L, &val);

			soc_uid <<= 32;

			soc_uid |= val;

		}

	}



	soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d",

					   (imx_soc_revision >> 4) & 0xf,

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