soc: imx8: Add i.MX8MQ UID(unique identifier) support (3026d0b7) · Commits · 戴 / test

drivers/soc/imx/soc-imx8.c

+22 −0

Original line number	Diff line number	Diff line
		@@ -16,6 +16,9 @@
		#define IMX8MQ_SW_INFO_B1 0x40
		#define IMX8MQ_SW_MAGIC_B1 0xff0055aa

		#define OCOTP_UID_LOW 0x410
		#define OCOTP_UID_HIGH 0x420

		/* Same as ANADIG_DIGPROG_IMX7D */
		#define ANADIG_DIGPROG_IMX8MM 0x800

		@@ -24,6 +27,16 @@ struct imx8_soc_data {
		u32 (*soc_revision)(void);
		};

		static u64 soc_uid;

		static ssize_t soc_uid_show(struct device *dev,
		struct device_attribute attr, char buf)
		{
		return sprintf(buf, "%016llX\n", soc_uid);
		}

		static DEVICE_ATTR_RO(soc_uid);

		static u32 __init imx8mq_soc_revision(void)
		{
		struct device_node *np;
		@@ -42,6 +55,10 @@ static u32 __init imx8mq_soc_revision(void)
		if (magic == IMX8MQ_SW_MAGIC_B1)
		rev = REV_B1;

		soc_uid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH);
		soc_uid <<= 32;
		soc_uid \|= readl_relaxed(ocotp_base + OCOTP_UID_LOW);

		iounmap(ocotp_base);

		out:
		@@ -140,6 +157,11 @@ static int __init imx8_soc_init(void)
		goto free_rev;
		}

		ret = device_create_file(soc_device_to_device(soc_dev),
		&dev_attr_soc_uid);
		if (ret)
		goto free_rev;

		if (IS_ENABLED(CONFIG_ARM_IMX_CPUFREQ_DT))
		platform_device_register_simple("imx-cpufreq-dt", -1, NULL, 0);