diff options
| author | Sebastian Reichel <sebastian.reichel@collabora.com> | 2021-01-27 18:40:24 +0100 |
|---|---|---|
| committer | Shawn Guo <shawnguo@kernel.org> | 2021-03-15 12:21:48 +0800 |
| commit | 1168935b962b240aeaec844855549c2e818fd965 (patch) | |
| tree | 288492c4214d96f4fa54a822439da831d4e9c152 /drivers/soc | |
| parent | a38fd8748464831584a19438cbb3082b5a2dab15 (diff) | |
| download | linux-1168935b962b240aeaec844855549c2e818fd965.tar.bz2 | |
soc: imx: add i.MX51/i.MX53 unique id support
i.MX51 and i.MX53 SoCs have a 64-bit SoC unique ID stored in IIM,
which can be used as SoC serial number. The same feature is already
implemented for i.MX6/i.MX7, so this complements support to earlier
SoCs.
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Diffstat (limited to 'drivers/soc')
| -rw-r--r-- | drivers/soc/imx/soc-imx.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/soc/imx/soc-imx.c b/drivers/soc/imx/soc-imx.c index 01bfea1cb64a..0738c0f36792 100644 --- a/drivers/soc/imx/soc-imx.c +++ b/drivers/soc/imx/soc-imx.c @@ -13,6 +13,8 @@ #include <soc/imx/cpu.h> #include <soc/imx/revision.h> +#define IIM_UID 0x820 + #define OCOTP_UID_H 0x420 #define OCOTP_UID_L 0x410 @@ -32,6 +34,7 @@ static int __init imx_soc_device_init(void) u64 soc_uid = 0; u32 val; int ret; + int i; if (of_machine_is_compatible("fsl,ls1021a")) return 0; @@ -68,9 +71,11 @@ static int __init imx_soc_device_init(void) soc_id = "i.MX35"; break; case MXC_CPU_MX51: + ocotp_compat = "fsl,imx51-iim"; soc_id = "i.MX51"; break; case MXC_CPU_MX53: + ocotp_compat = "fsl,imx53-iim"; soc_id = "i.MX53"; break; case MXC_CPU_IMX6SL: @@ -153,6 +158,13 @@ static int __init imx_soc_device_init(void) regmap_read(ocotp, OCOTP_ULP_UID_1, &val); soc_uid <<= 16; soc_uid |= val & 0xffff; + } else if (__mxc_cpu_type == MXC_CPU_MX51 || + __mxc_cpu_type == MXC_CPU_MX53) { + for (i=0; i < 8; i++) { + regmap_read(ocotp, IIM_UID + i*4, &val); + soc_uid <<= 8; + soc_uid |= (val & 0xff); + } } else { regmap_read(ocotp, OCOTP_UID_H, &val); soc_uid = val; |