From: Bastian Krause <bst@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Bastian Krause <bst@pengutronix.de>
Subject: [PATCH v2 3/3] nvmem: ocotp: set unique id as machine-id hashable
Date: Fri, 19 Jul 2019 12:55:34 +0200 [thread overview]
Message-ID: <20190719105534.30276-3-bst@pengutronix.de> (raw)
In-Reply-To: <20190719105534.30276-1-bst@pengutronix.de>
Pass the OCOTP unique id as hashable information to machine id
generation.
Signed-off-by: Bastian Krause <bst@pengutronix.de>
---
Changes since (implicit) v1:
- remove explicit address-of operator for unique_id_parts
---
drivers/nvmem/ocotp.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/nvmem/ocotp.c b/drivers/nvmem/ocotp.c
index 3f9f162860..d5e9d72a52 100644
--- a/drivers/nvmem/ocotp.c
+++ b/drivers/nvmem/ocotp.c
@@ -29,6 +29,7 @@
#include <regmap.h>
#include <linux/clk.h>
#include <mach/ocotp.h>
+#include <machine_id.h>
#include <linux/nvmem-provider.h>
/*
@@ -77,6 +78,9 @@
#define MAC_OFFSET_1 (0x24 * 4)
#define MAX_MAC_OFFSETS 2
#define MAC_BYTES 8
+#define UNIQUE_ID_NUM 2
+/* 0 <= n < UNIQUE_ID_NUM */
+#define UNIQUE_ID(n) (OCOTP_WORD(0x410 + 0x10 * (n)) | OCOTP_BIT(0) | OCOTP_WIDTH(32))
enum imx_ocotp_format_mac_direction {
OCOTP_HW_TO_MAC,
@@ -548,6 +552,23 @@ static int imx_ocotp_read(struct device_d *dev, const int offset, void *val,
return regmap_bulk_read(priv->map, offset, val, bytes);
}
+static int imx_ocotp_set_unique_machine_id(void)
+{
+ uint32_t unique_id_parts[UNIQUE_ID_NUM];
+ int ret, i;
+
+ for (i = 0; i < UNIQUE_ID_NUM; i++) {
+ ret = imx_ocotp_read_field(UNIQUE_ID(i), &unique_id_parts[i]);
+ if (ret < 0)
+ goto out;
+ }
+
+ machine_id_set_hashable(unique_id_parts, sizeof(unique_id_parts));
+
+out:
+ return ret;
+}
+
static const struct nvmem_bus imx_ocotp_nvmem_bus = {
.write = imx_ocotp_write,
.read = imx_ocotp_read,
@@ -633,6 +654,9 @@ static int imx_ocotp_probe(struct device_d *dev)
ethaddr->value, ethaddr);
}
+ if (IS_ENABLED(CONFIG_MACHINE_ID))
+ imx_ocotp_set_unique_machine_id();
+
imx_ocotp_init_dt(priv);
dev_add_param_bool(&(priv->dev), "sense_enable", NULL, NULL, &priv->sense_enable, priv);
--
2.20.1
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
prev parent reply other threads:[~2019-07-19 10:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-19 10:55 [PATCH v2 1/3] digest.h: needs errno definitions Bastian Krause
2019-07-19 10:55 ` [PATCH v2 2/3] common: machine_id: introduce machine id generation and pass id on Bastian Krause
2019-08-05 10:08 ` Sascha Hauer
2019-07-19 10:55 ` Bastian Krause [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190719105534.30276-3-bst@pengutronix.de \
--to=bst@pengutronix.de \
--cc=barebox@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox