The i.MX93 fusemap has a unique machine id. Use that for providing a
machine_id.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
drivers/nvmem/imx-ocotp-ele.c | 22 +++++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/drivers/nvmem/imx-ocotp-ele.c b/drivers/nvmem/imx-ocotp-ele.c
index b748a30b1f..9708d3f4bb 100644
--- a/drivers/nvmem/imx-ocotp-ele.c
+++ b/drivers/nvmem/imx-ocotp-ele.c
@@ -9,6 +9,10 @@
#include <linux/nvmem-provider.h>
#include <linux/regmap.h>
#include <mach/imx/ele.h>
+#include <machine_id.h>
+
+#define UNIQUE_ID_NUM 4
+#define OCOTP_UNIQUE_ID(n) (0xc0 + (n) * 4)
enum fuse_type {
FUSE_FSB = 1,
@@ -113,7 +117,20 @@ static int imx_ocotp_cell_pp(void *context, const char *id, unsigned int offset,
static struct regmap_bus imx_ocotp_regmap_bus = {
.reg_read = imx_ocotp_reg_read,
-};
+};
+
+static void imx_ocotp_set_unique_machine_id(struct imx_ocotp_priv *priv)
+{
+ uint32_t unique_id_parts[UNIQUE_ID_NUM];
+ int i;
+
+ for (i = 0; i < UNIQUE_ID_NUM; i++)
+ if (imx_ocotp_reg_read(priv, OCOTP_UNIQUE_ID(i),
+ &unique_id_parts[i]))
+ return;
+
+ machine_id_set_hashable(unique_id_parts, sizeof(unique_id_parts));
+}
static int imx_ele_ocotp_probe(struct device *dev)
{
@@ -145,6 +162,9 @@ static int imx_ele_ocotp_probe(struct device *dev)
if (IS_ERR(priv->map))
return PTR_ERR(priv->map);
+ if (IS_ENABLED(CONFIG_MACHINE_ID))
+ imx_ocotp_set_unique_machine_id(priv);
+
nvmem = nvmem_regmap_register_with_pp(priv->map, "imx-ocotp",
imx_ocotp_cell_pp);
if (IS_ERR(nvmem))
--
2.39.2
