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adc: rockchip-saradc: Use vdd-microvolts prop as fallback

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Change to use vdd-microvolts prop value as voltage reference when the
supply regulator is missing or when DM_REGULATOR=n is used.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
This commit is contained in:
Jonas Karlman 2024-10-17 20:00:26 +00:00 committed by Kever Yang
parent bcbfd1bb37
commit 6e751eed97
1 changed files with 6 additions and 3 deletions
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9
drivers/adc/rockchip-saradc.c
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@ -241,7 +241,7 @@ int rockchip_saradc_probe(struct udevice *dev)
{
struct adc_uclass_plat *uc_pdata = dev_get_uclass_plat(dev);
struct rockchip_saradc_priv *priv = dev_get_priv(dev);
struct udevice *vref;
struct udevice *vref = NULL;
struct clk clk;
int vref_uv;
int ret;
@ -259,7 +259,7 @@ int rockchip_saradc_probe(struct udevice *dev)
priv->active_channel = -1;
ret = device_get_supply_regulator(dev, "vref-supply", &vref);
if (ret) {
if (ret && uc_pdata->vdd_microvolts <= 0) {
printf("can't get vref-supply: %d\n", ret);
return ret;
}
@ -267,7 +267,10 @@ int rockchip_saradc_probe(struct udevice *dev)
if (priv->reset)
rockchip_saradc_reset_controller(priv->reset);
vref_uv = regulator_get_value(vref);
if (vref)
vref_uv = regulator_get_value(vref);
else
vref_uv = uc_pdata->vdd_microvolts;
if (vref_uv < 0) {
printf("can't get vref-supply value: %d\n", vref_uv);
return vref_uv;