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misc: k3_avs: Check validity of efuse voltage data

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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>
This commit is contained in:
Reid Tonking 2024-11-19 06:02:57 +05:30 • committed by Tom Rini
parent 287a3b25bd
commit afe0ab6d30
2 changed files with 33 additions and 0 deletions
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32
drivers/misc/k3_avs.c
View file

@ -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

1
include/k3-avs.h
View file

@ -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