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From: Anson.Huang@nxp.com
To: shawnguo@kernel.org, s.hauer@pengutronix.de,
	kernel@pengutronix.de, festevam@gmail.com, aisheng.dong@nxp.com,
	abel.vesa@nxp.com, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: Linux-imx@nxp.com
Subject: [PATCH] soc: imx-scu: Add SoC UID(unique identifier) support
Date: Wed, 26 Jun 2019 15:07:06 +0800	[thread overview]
Message-ID: <20190626070706.24930-1-Anson.Huang@nxp.com> (raw)

From: Anson Huang <Anson.Huang@nxp.com>

Add i.MX SCU SoC's UID(unique identifier) support, user
can read it from sysfs:

root@imx8qxpmek:~# cat /sys/devices/soc0/soc_uid
7B64280B57AC1898

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
 drivers/soc/imx/soc-imx-scu.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/drivers/soc/imx/soc-imx-scu.c b/drivers/soc/imx/soc-imx-scu.c
index 676f612..8d322a1 100644
--- a/drivers/soc/imx/soc-imx-scu.c
+++ b/drivers/soc/imx/soc-imx-scu.c
@@ -27,6 +27,36 @@ struct imx_sc_msg_misc_get_soc_id {
 	} data;
 } __packed;
 
+struct imx_sc_msg_misc_get_soc_uid {
+	struct imx_sc_rpc_msg hdr;
+	u32 uid_low;
+	u32 uid_high;
+} __packed;
+
+static ssize_t soc_uid_show(struct device *dev,
+			    struct device_attribute *attr, char *buf)
+{
+	struct imx_sc_msg_misc_get_soc_uid msg;
+	struct imx_sc_rpc_msg *hdr = &msg.hdr;
+	u64 soc_uid;
+
+	hdr->ver = IMX_SC_RPC_VERSION;
+	hdr->svc = IMX_SC_RPC_SVC_MISC;
+	hdr->func = IMX_SC_MISC_FUNC_UNIQUE_ID;
+	hdr->size = 1;
+
+	/* the return value of SCU FW is in correct, skip return value check */
+	imx_scu_call_rpc(soc_ipc_handle, &msg, true);
+
+	soc_uid = msg.uid_high;
+	soc_uid <<= 32;
+	soc_uid |= msg.uid_low;
+
+	return sprintf(buf, "%016llX\n", soc_uid);
+}
+
+static DEVICE_ATTR_RO(soc_uid);
+
 static int imx_scu_soc_id(void)
 {
 	struct imx_sc_msg_misc_get_soc_id msg;
@@ -102,6 +132,11 @@ static int imx_scu_soc_probe(struct platform_device *pdev)
 		goto free_revision;
 	}
 
+	ret = device_create_file(soc_device_to_device(soc_dev),
+				 &dev_attr_soc_uid);
+	if (ret)
+		goto free_revision;
+
 	return 0;
 
 free_revision:
-- 
2.7.4


WARNING: multiple messages have this Message-ID (diff)
From: Anson.Huang@nxp.com
To: shawnguo@kernel.org, s.hauer@pengutronix.de,
	kernel@pengutronix.de, festevam@gmail.com, aisheng.dong@nxp.com,
	abel.vesa@nxp.com, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: Linux-imx@nxp.com
Subject: [PATCH] soc: imx-scu: Add SoC UID(unique identifier) support
Date: Wed, 26 Jun 2019 15:07:06 +0800	[thread overview]
Message-ID: <20190626070706.24930-1-Anson.Huang@nxp.com> (raw)

From: Anson Huang <Anson.Huang@nxp.com>

Add i.MX SCU SoC's UID(unique identifier) support, user
can read it from sysfs:

root@imx8qxpmek:~# cat /sys/devices/soc0/soc_uid
7B64280B57AC1898

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
 drivers/soc/imx/soc-imx-scu.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/drivers/soc/imx/soc-imx-scu.c b/drivers/soc/imx/soc-imx-scu.c
index 676f612..8d322a1 100644
--- a/drivers/soc/imx/soc-imx-scu.c
+++ b/drivers/soc/imx/soc-imx-scu.c
@@ -27,6 +27,36 @@ struct imx_sc_msg_misc_get_soc_id {
 	} data;
 } __packed;
 
+struct imx_sc_msg_misc_get_soc_uid {
+	struct imx_sc_rpc_msg hdr;
+	u32 uid_low;
+	u32 uid_high;
+} __packed;
+
+static ssize_t soc_uid_show(struct device *dev,
+			    struct device_attribute *attr, char *buf)
+{
+	struct imx_sc_msg_misc_get_soc_uid msg;
+	struct imx_sc_rpc_msg *hdr = &msg.hdr;
+	u64 soc_uid;
+
+	hdr->ver = IMX_SC_RPC_VERSION;
+	hdr->svc = IMX_SC_RPC_SVC_MISC;
+	hdr->func = IMX_SC_MISC_FUNC_UNIQUE_ID;
+	hdr->size = 1;
+
+	/* the return value of SCU FW is in correct, skip return value check */
+	imx_scu_call_rpc(soc_ipc_handle, &msg, true);
+
+	soc_uid = msg.uid_high;
+	soc_uid <<= 32;
+	soc_uid |= msg.uid_low;
+
+	return sprintf(buf, "%016llX\n", soc_uid);
+}
+
+static DEVICE_ATTR_RO(soc_uid);
+
 static int imx_scu_soc_id(void)
 {
 	struct imx_sc_msg_misc_get_soc_id msg;
@@ -102,6 +132,11 @@ static int imx_scu_soc_probe(struct platform_device *pdev)
 		goto free_revision;
 	}
 
+	ret = device_create_file(soc_device_to_device(soc_dev),
+				 &dev_attr_soc_uid);
+	if (ret)
+		goto free_revision;
+
 	return 0;
 
 free_revision:
-- 
2.7.4


_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

             reply	other threads:[~2019-06-26  7:05 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-26  7:07 Anson.Huang [this message]
2019-06-26  7:07 ` [PATCH] soc: imx-scu: Add SoC UID(unique identifier) support Anson.Huang
2019-06-26 12:41 ` Daniel Baluta
2019-06-26 12:41   ` Daniel Baluta
2019-06-27  0:48   ` Anson Huang
2019-06-27  0:48     ` Anson Huang
2019-06-27  6:43     ` Daniel Baluta
2019-06-27  6:43       ` Daniel Baluta
2019-06-27  7:01       ` Anson Huang
2019-06-27  7:01         ` Anson Huang
2019-07-02  6:42         ` Marco Felsch
2019-07-02  6:42           ` Marco Felsch
2019-07-02  7:23           ` Anson Huang
2019-07-02  7:23             ` Anson Huang

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