Pass the OCOTP unique id as hashable information to machine id
generation.
Signed-off-by: Bastian Krause <bst@xxxxxxxxxxxxxx>
---
drivers/nvmem/ocotp.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/nvmem/ocotp.c b/drivers/nvmem/ocotp.c
index 3f9f162860..79693e22e0 100644
--- a/drivers/nvmem/ocotp.c
+++ b/drivers/nvmem/ocotp.c
@@ -29,6 +29,8 @@
#include <regmap.h>
#include <linux/clk.h>
#include <mach/ocotp.h>
+#include <machine_id.h>
+#include <mach/ocotp-fusemap.h>
#include <linux/nvmem-provider.h>
/*
@@ -77,6 +79,7 @@
#define MAC_OFFSET_1 (0x24 * 4)
#define MAX_MAC_OFFSETS 2
#define MAC_BYTES 8
+#define UNIQUE_ID_NUM 2
enum imx_ocotp_format_mac_direction {
OCOTP_HW_TO_MAC,
@@ -548,6 +551,19 @@ static int imx_ocotp_read(struct device_d *dev, const int offset, void *val,
return regmap_bulk_read(priv->map, offset, val, bytes);
}
+static void imx_ocotp_set_unique_machine_id(void)
+{
+ uint32_t unique_id_parts[UNIQUE_ID_NUM];
+ int i;
+
+ for (i = 0; i < UNIQUE_ID_NUM; i++)
+ if (imx_ocotp_read_field(OCOTP_UNIQUE_ID(i),
+ &unique_id_parts[i]))
+ return;
+
+ machine_id_set_hashable(unique_id_parts, sizeof(unique_id_parts));
+}
+
static const struct nvmem_bus imx_ocotp_nvmem_bus = {
.write = imx_ocotp_write,
.read = imx_ocotp_read,
@@ -633,6 +649,9 @@ 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);
--
2.23.0
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