diff options
| author | Anson Huang <Anson.Huang@nxp.com> | 2019-11-04 15:35:31 +0800 |
|---|---|---|
| committer | Shawn Guo <shawnguo@kernel.org> | 2019-12-12 20:38:01 +0800 |
| commit | b3082f1bf8a604c9a0f483b5d6060d7255c2a51b (patch) | |
| tree | a0b69e7b31efaa34e7a083e6ee4f48c86a68e28c /arch/arm/mach-imx | |
| parent | 7947e3238b64c00c396e6f5738f94c4d653bc6a2 (diff) | |
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: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Diffstat (limited to 'arch/arm/mach-imx')
| -rw-r--r-- | arch/arm/mach-imx/cpu.c | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/arch/arm/mach-imx/cpu.c b/arch/arm/mach-imx/cpu.c index 871f98342d50..06f8d64b65af 100644 --- a/arch/arm/mach-imx/cpu.c +++ b/arch/arm/mach-imx/cpu.c @@ -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: @@ -178,11 +184,25 @@ struct device * __init imx_soc_device_init(void) } if (!IS_ERR_OR_NULL(ocotp)) { - regmap_read(ocotp, OCOTP_UID_H, &val); - soc_uid = val; - regmap_read(ocotp, OCOTP_UID_L, &val); - soc_uid <<= 32; - soc_uid |= val; + 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", |