[PATCH] regulator: axp20x: AXP313A: set ramp_delay

[PATCH] regulator: axp20x: AXP313A: set ramp_delay

[Jernej Skrabec]

The AXP313A DCDC outputs need time to reach a new voltage, but the
driver reports no ramp delay. cpufreq thus raises the CPU clock before
the higher voltage is reached, which causes oopses and hangs within
minutes of DVFS activity on H616 boards like the Orange Pi Zero3.

The datasheet doesn't specify the slew rate. The vendor device trees
wait 25 us per 10 mV step, so set a ramp delay of 400 uV/us for all
three DCDCs.

Fixes: 60fd7eb89670 ("regulator: axp20x: Add support for AXP313a variant")
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
---
 drivers/regulator/axp20x-regulator.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/regulator/axp20x-regulator.c b/drivers/regulator/axp20x-regulator.c
index ec6ec071ffde..bad114c03ed4 100644
--- a/drivers/regulator/axp20x-regulator.c
+++ b/drivers/regulator/axp20x-regulator.c
@@ -744,18 +744,18 @@ static const struct linear_range axp313a_dcdc3_ranges[] = {
 };
 
 static const struct regulator_desc axp313a_regulators[] = {
-	AXP_DESC_RANGES(AXP313A, DCDC1, "dcdc1", "vin1",
+	AXP_DESC_RANGES_DELAY(AXP313A, DCDC1, "dcdc1", "vin1",
 			axp313a_dcdc1_ranges, AXP313A_DCDC1_NUM_VOLTAGES,
 			AXP313A_DCDC1_CONTROL, AXP313A_DCDC_V_OUT_MASK,
-			AXP313A_OUTPUT_CONTROL, BIT(0)),
-	AXP_DESC_RANGES(AXP313A, DCDC2, "dcdc2", "vin2",
+			AXP313A_OUTPUT_CONTROL, BIT(0), 400),
+	AXP_DESC_RANGES_DELAY(AXP313A, DCDC2, "dcdc2", "vin2",
 			axp313a_dcdc2_ranges, AXP313A_DCDC23_NUM_VOLTAGES,
 			AXP313A_DCDC2_CONTROL, AXP313A_DCDC_V_OUT_MASK,
-			AXP313A_OUTPUT_CONTROL, BIT(1)),
-	AXP_DESC_RANGES(AXP313A, DCDC3, "dcdc3", "vin3",
+			AXP313A_OUTPUT_CONTROL, BIT(1), 400),
+	AXP_DESC_RANGES_DELAY(AXP313A, DCDC3, "dcdc3", "vin3",
 			axp313a_dcdc3_ranges, AXP313A_DCDC23_NUM_VOLTAGES,
 			AXP313A_DCDC3_CONTROL, AXP313A_DCDC_V_OUT_MASK,
-			AXP313A_OUTPUT_CONTROL, BIT(2)),
+			AXP313A_OUTPUT_CONTROL, BIT(2), 400),
 	AXP_DESC(AXP313A, ALDO1, "aldo1", "vin1", 500, 3500, 100,
 		 AXP313A_ALDO1_CONTROL, AXP313A_LDO_V_OUT_MASK,
 		 AXP313A_OUTPUT_CONTROL, BIT(3)),

base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
-- 
2.43.0

Re: [PATCH] regulator: axp20x: AXP313A: set ramp_delay

[Chen-Yu Tsai]

On Sun, Nov 15, 2026 at 11:08 PM Jernej Skrabec
<jernej.skrabec@gmail.com> wrote:
>
> The AXP313A DCDC outputs need time to reach a new voltage, but the
> driver reports no ramp delay. cpufreq thus raises the CPU clock before
> the higher voltage is reached, which causes oopses and hangs within
> minutes of DVFS activity on H616 boards like the Orange Pi Zero3.
>
> The datasheet doesn't specify the slew rate. The vendor device trees
> wait 25 us per 10 mV step, so set a ramp delay of 400 uV/us for all
> three DCDCs.
>
> Fixes: 60fd7eb89670 ("regulator: axp20x: Add support for AXP313a variant")
> Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>

Acked-by: Chen-Yu Tsai <wens@kernel.org>