misc: k3_avs: Check validity of efuse voltage data
k3_avs driver checks opp_ids when probing and overwrites the voltage
values in vd_data for the respective board. The new k3_avs_check_opp()
can be called from board files to check the efuse data and returns 0 if
valid.
Also add the same check in k3_avs_program_voltage() to error out if
the efuse data was not valid.
Signed-off-by: Reid Tonking <reidt@ti.com>
Signed-off-by: Aniket Limaye <a-limaye@ti.com>
Reviewed-by: Manorit Chawdhry <m-chawdhry@ti.com>
diff --git a/drivers/misc/k3_avs.c b/drivers/misc/k3_avs.c
index 9d950d0..0774e0a 100644
--- a/drivers/misc/k3_avs.c
+++ b/drivers/misc/k3_avs.c
@@ -121,6 +121,11 @@
if (!vd->supply)
return -ENODEV;
+ if (!volt) {
+ dev_err(priv->dev, "No efuse found for opp_%d\n", opp_id);
+ return -EINVAL;
+ }
+
vd->opp = opp_id;
vd->flags |= VD_FLAG_INIT_DONE;
@@ -189,6 +194,33 @@
printf("No matching OPP found for freq %d.\n", freq);
+ return -EINVAL;
+}
+
+/**
+ * k3_check_opp: Check for presence of opp efuse
+ * @dev: AVS device
+ * @vdd_id: voltage domain ID
+ * @opp_id: opp id to check if voltage is present
+ *
+ * Checks to see if an opp has voltage. k3_avs probe will populate
+ * voltage data if efuse is present. Returns 0 if data is valid.
+ */
+int k3_avs_check_opp(struct udevice *dev, int vdd_id, int opp_id)
+{
+ struct k3_avs_privdata *priv = dev_get_priv(dev);
+ struct vd_data *vd;
+ int volt;
+
+ vd = get_vd(priv, vdd_id);
+ if (!vd)
+ return -EINVAL;
+
+ volt = vd->opps[opp_id].volt;
+ if (volt)
+ return 0;
+
+ printf("No efuse found for opp_%d\n", opp_id);
return -EINVAL;
}
diff --git a/include/k3-avs.h b/include/k3-avs.h
index f6f1031..5a973e4 100644
--- a/include/k3-avs.h
+++ b/include/k3-avs.h
@@ -27,5 +27,6 @@
int k3_avs_set_opp(struct udevice *dev, int vdd_id, int opp_id);
int k3_avs_notify_freq(int dev_id, int clk_id, u32 freq);
+int k3_avs_check_opp(struct udevice *dev, int vdd_id, int opp_id);
#endif