Re: [PATCH v2 2/5] regulator: axp20x: AXP717: fix LDO supply rails and off-by-ones

[John Watts <contact@jookia.org>]

On Thu, Apr 18, 2024 at 01:07:33AM +0100, Andre Przywara wrote:
> The X-Powers AXP717 PMIC has separate input supply pins for each group
> of LDOs, so they are not all using the same DCDC1 input, as described
> currently.
> 
> Replace the "supply" member of each LDO description with the respective
> group supply name, so that the supply dependencies can be correctly
> described in the devicetree.
> 
> Also fix two off-by-ones in the regulator macros, after some double
> checking the numbers against the datasheet. This uncovered a bug in the
> datasheet: add a comment to document this.

Hi,

This looks a lot better with the comment.

John.

Reviewed-by: John Watts <contact@jookia.org>

> 
> Fixes: d2ac3df75c3a ("regulator: axp20x: add support for the AXP717")
> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
> ---
>  drivers/regulator/axp20x-regulator.c | 33 ++++++++++++++++------------
>  1 file changed, 19 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/regulator/axp20x-regulator.c b/drivers/regulator/axp20x-regulator.c
> index 34fcdd82b2eaa..f3c447ecdc3bf 100644
> --- a/drivers/regulator/axp20x-regulator.c
> +++ b/drivers/regulator/axp20x-regulator.c
> @@ -140,7 +140,7 @@
>  
>  #define AXP717_DCDC1_NUM_VOLTAGES	88
>  #define AXP717_DCDC2_NUM_VOLTAGES	107
> -#define AXP717_DCDC3_NUM_VOLTAGES	104
> +#define AXP717_DCDC3_NUM_VOLTAGES	103
>  #define AXP717_DCDC_V_OUT_MASK		GENMASK(6, 0)
>  #define AXP717_LDO_V_OUT_MASK		GENMASK(4, 0)
>  
> @@ -763,10 +763,15 @@ static const struct linear_range axp717_dcdc1_ranges[] = {
>  	REGULATOR_LINEAR_RANGE(1220000, 71, 87, 20000),
>  };
>  
> +/*
> + * The manual says that the last voltage is 3.4V, encoded as 0b1101011 (107),
> + * but every other method proves that this is wrong, so it's really 106 that
> + * programs the final 3.4V.
> + */
>  static const struct linear_range axp717_dcdc2_ranges[] = {
>  	REGULATOR_LINEAR_RANGE(500000,   0,  70,  10000),
>  	REGULATOR_LINEAR_RANGE(1220000, 71,  87,  20000),
> -	REGULATOR_LINEAR_RANGE(1600000, 88, 107, 100000),
> +	REGULATOR_LINEAR_RANGE(1600000, 88, 106, 100000),
>  };
>  
>  static const struct linear_range axp717_dcdc3_ranges[] = {
> @@ -790,40 +795,40 @@ static const struct regulator_desc axp717_regulators[] = {
>  	AXP_DESC(AXP717, DCDC4, "dcdc4", "vin4", 1000, 3700, 100,
>  		 AXP717_DCDC4_CONTROL, AXP717_DCDC_V_OUT_MASK,
>  		 AXP717_DCDC_OUTPUT_CONTROL, BIT(3)),
> -	AXP_DESC(AXP717, ALDO1, "aldo1", "vin1", 500, 3500, 100,
> +	AXP_DESC(AXP717, ALDO1, "aldo1", "aldoin", 500, 3500, 100,
>  		 AXP717_ALDO1_CONTROL, AXP717_LDO_V_OUT_MASK,
>  		 AXP717_LDO0_OUTPUT_CONTROL, BIT(0)),
> -	AXP_DESC(AXP717, ALDO2, "aldo2", "vin1", 500, 3500, 100,
> +	AXP_DESC(AXP717, ALDO2, "aldo2", "aldoin", 500, 3500, 100,
>  		 AXP717_ALDO2_CONTROL, AXP717_LDO_V_OUT_MASK,
>  		 AXP717_LDO0_OUTPUT_CONTROL, BIT(1)),
> -	AXP_DESC(AXP717, ALDO3, "aldo3", "vin1", 500, 3500, 100,
> +	AXP_DESC(AXP717, ALDO3, "aldo3", "aldoin", 500, 3500, 100,
>  		 AXP717_ALDO3_CONTROL, AXP717_LDO_V_OUT_MASK,
>  		 AXP717_LDO0_OUTPUT_CONTROL, BIT(2)),
> -	AXP_DESC(AXP717, ALDO4, "aldo4", "vin1", 500, 3500, 100,
> +	AXP_DESC(AXP717, ALDO4, "aldo4", "aldoin", 500, 3500, 100,
>  		 AXP717_ALDO4_CONTROL, AXP717_LDO_V_OUT_MASK,
>  		 AXP717_LDO0_OUTPUT_CONTROL, BIT(3)),
> -	AXP_DESC(AXP717, BLDO1, "bldo1", "vin1", 500, 3500, 100,
> +	AXP_DESC(AXP717, BLDO1, "bldo1", "bldoin", 500, 3500, 100,
>  		 AXP717_BLDO1_CONTROL, AXP717_LDO_V_OUT_MASK,
>  		 AXP717_LDO0_OUTPUT_CONTROL, BIT(4)),
> -	AXP_DESC(AXP717, BLDO2, "bldo2", "vin1", 500, 3500, 100,
> +	AXP_DESC(AXP717, BLDO2, "bldo2", "bldoin", 500, 3500, 100,
>  		 AXP717_BLDO2_CONTROL, AXP717_LDO_V_OUT_MASK,
>  		 AXP717_LDO0_OUTPUT_CONTROL, BIT(5)),
> -	AXP_DESC(AXP717, BLDO3, "bldo3", "vin1", 500, 3500, 100,
> +	AXP_DESC(AXP717, BLDO3, "bldo3", "bldoin", 500, 3500, 100,
>  		 AXP717_BLDO3_CONTROL, AXP717_LDO_V_OUT_MASK,
>  		 AXP717_LDO0_OUTPUT_CONTROL, BIT(6)),
> -	AXP_DESC(AXP717, BLDO4, "bldo4", "vin1", 500, 3500, 100,
> +	AXP_DESC(AXP717, BLDO4, "bldo4", "bldoin", 500, 3500, 100,
>  		 AXP717_BLDO4_CONTROL, AXP717_LDO_V_OUT_MASK,
>  		 AXP717_LDO0_OUTPUT_CONTROL, BIT(7)),
> -	AXP_DESC(AXP717, CLDO1, "cldo1", "vin1", 500, 3500, 100,
> +	AXP_DESC(AXP717, CLDO1, "cldo1", "cldoin", 500, 3500, 100,
>  		 AXP717_CLDO1_CONTROL, AXP717_LDO_V_OUT_MASK,
>  		 AXP717_LDO1_OUTPUT_CONTROL, BIT(0)),
> -	AXP_DESC(AXP717, CLDO2, "cldo2", "vin1", 500, 3500, 100,
> +	AXP_DESC(AXP717, CLDO2, "cldo2", "cldoin", 500, 3500, 100,
>  		 AXP717_CLDO2_CONTROL, AXP717_LDO_V_OUT_MASK,
>  		 AXP717_LDO1_OUTPUT_CONTROL, BIT(1)),
> -	AXP_DESC(AXP717, CLDO3, "cldo3", "vin1", 500, 3500, 100,
> +	AXP_DESC(AXP717, CLDO3, "cldo3", "cldoin", 500, 3500, 100,
>  		 AXP717_CLDO3_CONTROL, AXP717_LDO_V_OUT_MASK,
>  		 AXP717_LDO1_OUTPUT_CONTROL, BIT(2)),
> -	AXP_DESC(AXP717, CLDO4, "cldo4", "vin1", 500, 3500, 100,
> +	AXP_DESC(AXP717, CLDO4, "cldo4", "cldoin", 500, 3500, 100,
>  		 AXP717_CLDO4_CONTROL, AXP717_LDO_V_OUT_MASK,
>  		 AXP717_LDO1_OUTPUT_CONTROL, BIT(3)),
>  	AXP_DESC(AXP717, CPUSLDO, "cpusldo", "vin1", 500, 1400, 50,
> -- 
> 2.35.8
>