* [PATCH 1/2] soc: imx8: Add i.MX8MQ UID(unique identifier) support
@ 2019-06-26 7:44 Anson.Huang
2019-06-26 7:44 ` [PATCH 2/2] soc: imx8: Add i.MX8MM " Anson.Huang
2019-07-18 7:14 ` [PATCH 1/2] soc: imx8: Add i.MX8MQ " Shawn Guo
0 siblings, 2 replies; 3+ messages in thread
From: Anson.Huang @ 2019-06-26 7:44 UTC (permalink / raw)
To: shawnguo, s.hauer, kernel, festevam, leonard.crestez, abel.vesa,
viresh.kumar, linux-arm-kernel, linux-kernel
Cc: Linux-imx
From: Anson Huang <Anson.Huang@nxp.com>
Add i.MX8MQ SoC UID(unique identifier) support, user
can read it from sysfs:
root@imx8mqevk:~# cat /sys/devices/soc0/soc_uid
D56911D6F060954B
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
drivers/soc/imx/soc-imx8.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/drivers/soc/imx/soc-imx8.c b/drivers/soc/imx/soc-imx8.c
index f924ae8..c19ef4b 100644
--- a/drivers/soc/imx/soc-imx8.c
+++ b/drivers/soc/imx/soc-imx8.c
@@ -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);
--
2.7.4
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH 2/2] soc: imx8: Add i.MX8MM UID(unique identifier) support
2019-06-26 7:44 [PATCH 1/2] soc: imx8: Add i.MX8MQ UID(unique identifier) support Anson.Huang
@ 2019-06-26 7:44 ` Anson.Huang
2019-07-18 7:14 ` [PATCH 1/2] soc: imx8: Add i.MX8MQ " Shawn Guo
1 sibling, 0 replies; 3+ messages in thread
From: Anson.Huang @ 2019-06-26 7:44 UTC (permalink / raw)
To: shawnguo, s.hauer, kernel, festevam, leonard.crestez, abel.vesa,
viresh.kumar, linux-arm-kernel, linux-kernel
Cc: Linux-imx
From: Anson Huang <Anson.Huang@nxp.com>
Add i.MX8MM SoC UID(unique identifier) support, user
can read it from sysfs:
root@imx8mmevk:~# cat /sys/devices/soc0/soc_uid
B365FA0A5C85D6EE
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
drivers/soc/imx/soc-imx8.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/soc/imx/soc-imx8.c b/drivers/soc/imx/soc-imx8.c
index c19ef4b..b9831576 100644
--- a/drivers/soc/imx/soc-imx8.c
+++ b/drivers/soc/imx/soc-imx8.c
@@ -66,6 +66,26 @@ static u32 __init imx8mq_soc_revision(void)
return rev;
}
+static void __init imx8mm_soc_uid(void)
+{
+ void __iomem *ocotp_base;
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,imx8mm-ocotp");
+ if (!np)
+ return;
+
+ ocotp_base = of_iomap(np, 0);
+ WARN_ON(!ocotp_base);
+
+ soc_uid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH);
+ soc_uid <<= 32;
+ soc_uid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW);
+
+ iounmap(ocotp_base);
+ of_node_put(np);
+}
+
static u32 __init imx8mm_soc_revision(void)
{
struct device_node *np;
@@ -83,6 +103,9 @@ static u32 __init imx8mm_soc_revision(void)
iounmap(anatop_base);
of_node_put(np);
+
+ imx8mm_soc_uid();
+
return rev;
}
--
2.7.4
_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH 1/2] soc: imx8: Add i.MX8MQ UID(unique identifier) support
2019-06-26 7:44 [PATCH 1/2] soc: imx8: Add i.MX8MQ UID(unique identifier) support Anson.Huang
2019-06-26 7:44 ` [PATCH 2/2] soc: imx8: Add i.MX8MM " Anson.Huang
@ 2019-07-18 7:14 ` Shawn Guo
1 sibling, 0 replies; 3+ messages in thread
From: Shawn Guo @ 2019-07-18 7:14 UTC (permalink / raw)
To: Anson.Huang
Cc: abel.vesa, viresh.kumar, s.hauer, linux-kernel, Linux-imx,
kernel, leonard.crestez, festevam, linux-arm-kernel
On Wed, Jun 26, 2019 at 03:44:14PM +0800, Anson.Huang@nxp.com wrote:
> From: Anson Huang <Anson.Huang@nxp.com>
>
> Add i.MX8MQ SoC UID(unique identifier) support, user
> can read it from sysfs:
>
> root@imx8mqevk:~# cat /sys/devices/soc0/soc_uid
> D56911D6F060954B
>
> Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Applied both, thanks.
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2019-07-18 7:15 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2019-06-26 7:44 [PATCH 1/2] soc: imx8: Add i.MX8MQ UID(unique identifier) support Anson.Huang
2019-06-26 7:44 ` [PATCH 2/2] soc: imx8: Add i.MX8MM " Anson.Huang
2019-07-18 7:14 ` [PATCH 1/2] soc: imx8: Add i.MX8MQ " Shawn Guo
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