From: Reid Tonking <reidt@ti.com>
Date: Tue, 19 Nov 2024 00:32:57 +0000 (+0530)
Subject: misc: k3_avs: Check validity of efuse voltage data
X-Git-Tag: v2025.04-rc1~17^2~70^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=afe0ab6d3004b435cd17d3b5864de6461d68c7a0;p=pandora-u-boot.git

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 9d950d034a5..0774e0a4c9e 100644
--- a/drivers/misc/k3_avs.c
+++ b/drivers/misc/k3_avs.c
@@ -121,6 +121,11 @@ static int k3_avs_program_voltage(struct k3_avs_privdata *priv,
 	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;
 
@@ -192,6 +197,33 @@ static int match_opp(struct vd_data *vd, u32 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;
+}
+
 /**
  * k3_avs_notify_freq: Notify clock rate change towards AVS subsystem
  * @dev_id: Device ID for the clock to be changed
diff --git a/include/k3-avs.h b/include/k3-avs.h
index f6f1031c9cc..5a973e4ed45 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