From 6e751eed97f910b60de10b20f3932e1bffa81ccc Mon Sep 17 00:00:00 2001
From: Jonas Karlman <jonas@kwiboo.se>
Date: Thu, 17 Oct 2024 20:00:26 +0000
Subject: [PATCH] adc: rockchip-saradc: Use vdd-microvolts prop as fallback
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>
---
drivers/adc/rockchip-saradc.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/adc/rockchip-saradc.c b/drivers/adc/rockchip-saradc.c
index f6832ab307..7cf9735f60 100644
--- a/drivers/adc/rockchip-saradc.c
+++ b/drivers/adc/rockchip-saradc.c
@@ -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;
--
2.39.5