diff mbox series

[v2,15/17] power: axp20x_battery: Add constant charge current table

Message ID 20220607155324.118102-16-aidanmacdonald.0x0@gmail.com (mailing list archive)
State Changes Requested
Headers show
Series Add support for AXP192 PMIC | expand

Commit Message

Aidan MacDonald June 7, 2022, 3:53 p.m. UTC 
Add a table-based lookup method for constant charge current,
which is necessary when the setting cannot be represented as
a linear range.

Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
---
 drivers/power/supply/axp20x_battery.c | 53 +++++++++++++++++++++------
 1 file changed, 41 insertions(+), 12 deletions(-)

Comments

Sebastian Reichel June 9, 2022, 9:11 p.m. UTC | #1 
Hi,

On Tue, Jun 07, 2022 at 04:53:22PM +0100, Aidan MacDonald wrote:
> Add a table-based lookup method for constant charge current,
> which is necessary when the setting cannot be represented as
> a linear range.
> 
> Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
> ---
>  drivers/power/supply/axp20x_battery.c | 53 +++++++++++++++++++++------
>  1 file changed, 41 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/power/supply/axp20x_battery.c b/drivers/power/supply/axp20x_battery.c
> index 9106077c0dbb..87fb958f2224 100644
> --- a/drivers/power/supply/axp20x_battery.c
> +++ b/drivers/power/supply/axp20x_battery.c
> @@ -61,6 +61,7 @@ struct axp20x_batt_ps;
>  struct axp_data {
>  	int	ccc_scale;
>  	int	ccc_offset;
> +	const int *ccc_table;

Please document the struct; especially the fact that ccc_table must
have a size of AXP20X_CHRG_CTRL1_TGT_CURR + 1.

-- Sebastian

>  	bool	has_fg_valid;
>  	int	(*get_max_voltage)(struct axp20x_batt_ps *batt, int *val);
>  	int	(*set_max_voltage)(struct axp20x_batt_ps *batt, int val);
> @@ -176,7 +177,10 @@ static int axp20x_get_constant_charge_current(struct axp20x_batt_ps *axp,
>  
>  	*val &= AXP20X_CHRG_CTRL1_TGT_CURR;
>  
> -	*val = *val * axp->data->ccc_scale + axp->data->ccc_offset;
> +	if (axp->data->ccc_table)
> +		*val = axp->data->ccc_table[*val];
> +	else
> +		*val = *val * axp->data->ccc_scale + axp->data->ccc_offset;
>  
>  	return 0;
>  }
> @@ -389,16 +393,36 @@ static int axp20x_battery_set_max_voltage(struct axp20x_batt_ps *axp20x_batt,
>  				  AXP20X_CHRG_CTRL1_TGT_VOLT, val);
>  }
>  
> +static int axp20x_get_constant_charge_current_sel(struct axp20x_batt_ps *axp_batt,
> +						  int charge_current)
> +{
> +	int i;
> +
> +	if (axp_batt->data->ccc_table) {
> +		for (i = AXP20X_CHRG_CTRL1_TGT_CURR; i >= 0; --i) {
> +			if (axp_batt->data->ccc_table[i] <= charge_current)
> +				return i;
> +		}
> +
> +		return -EINVAL;
> +	}
> +
> +	i = (charge_current - axp_batt->data->ccc_offset) / axp_batt->data->ccc_scale;
> +
> +	if (i > AXP20X_CHRG_CTRL1_TGT_CURR || i < 0)
> +		return -EINVAL;
> +
> +	return i;
> +}
> +
>  static int axp20x_set_constant_charge_current(struct axp20x_batt_ps *axp_batt,
>  					      int charge_current)
>  {
>  	if (charge_current > axp_batt->max_ccc)
>  		return -EINVAL;
>  
> -	charge_current = (charge_current - axp_batt->data->ccc_offset) /
> -		axp_batt->data->ccc_scale;
> -
> -	if (charge_current > AXP20X_CHRG_CTRL1_TGT_CURR || charge_current < 0)
> +	charge_current = axp20x_get_constant_charge_current_sel(axp_batt, charge_current);
> +	if (charge_current < 0)
>  		return -EINVAL;
>  
>  	return regmap_update_bits(axp_batt->regmap, AXP20X_CHRG_CTRL1,
> @@ -410,14 +434,14 @@ static int axp20x_set_max_constant_charge_current(struct axp20x_batt_ps *axp,
>  {
>  	bool lower_max = false;
>  
> -	charge_current = (charge_current - axp->data->ccc_offset) /
> -		axp->data->ccc_scale;
> -
> -	if (charge_current > AXP20X_CHRG_CTRL1_TGT_CURR || charge_current < 0)
> +	charge_current = axp20x_get_constant_charge_current_sel(axp, charge_current);
> +	if (charge_current < 0)
>  		return -EINVAL;
>  
> -	charge_current = charge_current * axp->data->ccc_scale +
> -		axp->data->ccc_offset;
> +	if (axp->data->ccc_table)
> +		charge_current = axp->data->ccc_table[charge_current];
> +	else
> +		charge_current = charge_current * axp->data->ccc_scale + axp->data->ccc_offset;
>  
>  	if (charge_current > axp->max_ccc)
>  		dev_warn(axp->dev,
> @@ -629,7 +653,12 @@ static int axp20x_power_probe(struct platform_device *pdev)
>  								   ccc)) {
>  			dev_err(&pdev->dev,
>  				"couldn't set constant charge current from DT: fallback to minimum value\n");
> -			ccc = 300000;
> +
> +			if (axp20x_batt->data->ccc_table)
> +				ccc = axp20x_batt->data->ccc_table[0];
> +			else
> +				ccc = axp20x_batt->data->ccc_offset;
> +
>  			axp20x_batt->max_ccc = ccc;
>  			axp20x_set_constant_charge_current(axp20x_batt, ccc);
>  		}
> -- 
> 2.35.1
>
Aidan MacDonald June 10, 2022, 3:40 p.m. UTC | #2 
Sebastian Reichel <sebastian.reichel@collabora.com> writes:

> Hi,
>
> On Tue, Jun 07, 2022 at 04:53:22PM +0100, Aidan MacDonald wrote:
>> Add a table-based lookup method for constant charge current,
>> which is necessary when the setting cannot be represented as
>> a linear range.
>> 
>> Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
>> ---
>>  drivers/power/supply/axp20x_battery.c | 53 +++++++++++++++++++++------
>>  1 file changed, 41 insertions(+), 12 deletions(-)
>> 
>> diff --git a/drivers/power/supply/axp20x_battery.c b/drivers/power/supply/axp20x_battery.c
>> index 9106077c0dbb..87fb958f2224 100644
>> --- a/drivers/power/supply/axp20x_battery.c
>> +++ b/drivers/power/supply/axp20x_battery.c
>> @@ -61,6 +61,7 @@ struct axp20x_batt_ps;
>>  struct axp_data {
>>  	int	ccc_scale;
>>  	int	ccc_offset;
>> +	const int *ccc_table;
>
> Please document the struct; especially the fact that ccc_table must
> have a size of AXP20X_CHRG_CTRL1_TGT_CURR + 1.
>
> -- Sebastian
>

Thanks, I'll make sure to do that in v3.

Regards,
Aidan

>>  	bool	has_fg_valid;
>>  	int	(*get_max_voltage)(struct axp20x_batt_ps *batt, int *val);
>>  	int	(*set_max_voltage)(struct axp20x_batt_ps *batt, int val);
>> @@ -176,7 +177,10 @@ static int axp20x_get_constant_charge_current(struct axp20x_batt_ps *axp,
>>  
>>  	*val &= AXP20X_CHRG_CTRL1_TGT_CURR;
>>  
>> -	*val = *val * axp->data->ccc_scale + axp->data->ccc_offset;
>> +	if (axp->data->ccc_table)
>> +		*val = axp->data->ccc_table[*val];
>> +	else
>> +		*val = *val * axp->data->ccc_scale + axp->data->ccc_offset;
>>  
>>  	return 0;
>>  }
>> @@ -389,16 +393,36 @@ static int axp20x_battery_set_max_voltage(struct axp20x_batt_ps *axp20x_batt,
>>  				  AXP20X_CHRG_CTRL1_TGT_VOLT, val);
>>  }
>>  
>> +static int axp20x_get_constant_charge_current_sel(struct axp20x_batt_ps *axp_batt,
>> +						  int charge_current)
>> +{
>> +	int i;
>> +
>> +	if (axp_batt->data->ccc_table) {
>> +		for (i = AXP20X_CHRG_CTRL1_TGT_CURR; i >= 0; --i) {
>> +			if (axp_batt->data->ccc_table[i] <= charge_current)
>> +				return i;
>> +		}
>> +
>> +		return -EINVAL;
>> +	}
>> +
>> +	i = (charge_current - axp_batt->data->ccc_offset) / axp_batt->data->ccc_scale;
>> +
>> +	if (i > AXP20X_CHRG_CTRL1_TGT_CURR || i < 0)
>> +		return -EINVAL;
>> +
>> +	return i;
>> +}
>> +
>>  static int axp20x_set_constant_charge_current(struct axp20x_batt_ps *axp_batt,
>>  					      int charge_current)
>>  {
>>  	if (charge_current > axp_batt->max_ccc)
>>  		return -EINVAL;
>>  
>> -	charge_current = (charge_current - axp_batt->data->ccc_offset) /
>> -		axp_batt->data->ccc_scale;
>> -
>> -	if (charge_current > AXP20X_CHRG_CTRL1_TGT_CURR || charge_current < 0)
>> +	charge_current = axp20x_get_constant_charge_current_sel(axp_batt, charge_current);
>> +	if (charge_current < 0)
>>  		return -EINVAL;
>>  
>>  	return regmap_update_bits(axp_batt->regmap, AXP20X_CHRG_CTRL1,
>> @@ -410,14 +434,14 @@ static int axp20x_set_max_constant_charge_current(struct axp20x_batt_ps *axp,
>>  {
>>  	bool lower_max = false;
>>  
>> -	charge_current = (charge_current - axp->data->ccc_offset) /
>> -		axp->data->ccc_scale;
>> -
>> -	if (charge_current > AXP20X_CHRG_CTRL1_TGT_CURR || charge_current < 0)
>> +	charge_current = axp20x_get_constant_charge_current_sel(axp, charge_current);
>> +	if (charge_current < 0)
>>  		return -EINVAL;
>>  
>> -	charge_current = charge_current * axp->data->ccc_scale +
>> -		axp->data->ccc_offset;
>> +	if (axp->data->ccc_table)
>> +		charge_current = axp->data->ccc_table[charge_current];
>> +	else
>> +		charge_current = charge_current * axp->data->ccc_scale + axp->data->ccc_offset;
>>  
>>  	if (charge_current > axp->max_ccc)
>>  		dev_warn(axp->dev,
>> @@ -629,7 +653,12 @@ static int axp20x_power_probe(struct platform_device *pdev)
>>  								   ccc)) {
>>  			dev_err(&pdev->dev,
>>  				"couldn't set constant charge current from DT: fallback to minimum value\n");
>> -			ccc = 300000;
>> +
>> +			if (axp20x_batt->data->ccc_table)
>> +				ccc = axp20x_batt->data->ccc_table[0];
>> +			else
>> +				ccc = axp20x_batt->data->ccc_offset;
>> +
>>  			axp20x_batt->max_ccc = ccc;
>>  			axp20x_set_constant_charge_current(axp20x_batt, ccc);
>>  		}
>> -- 
>> 2.35.1
>>
diff mbox series

Patch

diff --git a/drivers/power/supply/axp20x_battery.c b/drivers/power/supply/axp20x_battery.c
index 9106077c0dbb..87fb958f2224 100644
--- a/drivers/power/supply/axp20x_battery.c
+++ b/drivers/power/supply/axp20x_battery.c
@@ -61,6 +61,7 @@  struct axp20x_batt_ps;
 struct axp_data {
 	int	ccc_scale;
 	int	ccc_offset;
+	const int *ccc_table;
 	bool	has_fg_valid;
 	int	(*get_max_voltage)(struct axp20x_batt_ps *batt, int *val);
 	int	(*set_max_voltage)(struct axp20x_batt_ps *batt, int val);
@@ -176,7 +177,10 @@  static int axp20x_get_constant_charge_current(struct axp20x_batt_ps *axp,
 
 	*val &= AXP20X_CHRG_CTRL1_TGT_CURR;
 
-	*val = *val * axp->data->ccc_scale + axp->data->ccc_offset;
+	if (axp->data->ccc_table)
+		*val = axp->data->ccc_table[*val];
+	else
+		*val = *val * axp->data->ccc_scale + axp->data->ccc_offset;
 
 	return 0;
 }
@@ -389,16 +393,36 @@  static int axp20x_battery_set_max_voltage(struct axp20x_batt_ps *axp20x_batt,
 				  AXP20X_CHRG_CTRL1_TGT_VOLT, val);
 }
 
+static int axp20x_get_constant_charge_current_sel(struct axp20x_batt_ps *axp_batt,
+						  int charge_current)
+{
+	int i;
+
+	if (axp_batt->data->ccc_table) {
+		for (i = AXP20X_CHRG_CTRL1_TGT_CURR; i >= 0; --i) {
+			if (axp_batt->data->ccc_table[i] <= charge_current)
+				return i;
+		}
+
+		return -EINVAL;
+	}
+
+	i = (charge_current - axp_batt->data->ccc_offset) / axp_batt->data->ccc_scale;
+
+	if (i > AXP20X_CHRG_CTRL1_TGT_CURR || i < 0)
+		return -EINVAL;
+
+	return i;
+}
+
 static int axp20x_set_constant_charge_current(struct axp20x_batt_ps *axp_batt,
 					      int charge_current)
 {
 	if (charge_current > axp_batt->max_ccc)
 		return -EINVAL;
 
-	charge_current = (charge_current - axp_batt->data->ccc_offset) /
-		axp_batt->data->ccc_scale;
-
-	if (charge_current > AXP20X_CHRG_CTRL1_TGT_CURR || charge_current < 0)
+	charge_current = axp20x_get_constant_charge_current_sel(axp_batt, charge_current);
+	if (charge_current < 0)
 		return -EINVAL;
 
 	return regmap_update_bits(axp_batt->regmap, AXP20X_CHRG_CTRL1,
@@ -410,14 +434,14 @@  static int axp20x_set_max_constant_charge_current(struct axp20x_batt_ps *axp,
 {
 	bool lower_max = false;
 
-	charge_current = (charge_current - axp->data->ccc_offset) /
-		axp->data->ccc_scale;
-
-	if (charge_current > AXP20X_CHRG_CTRL1_TGT_CURR || charge_current < 0)
+	charge_current = axp20x_get_constant_charge_current_sel(axp, charge_current);
+	if (charge_current < 0)
 		return -EINVAL;
 
-	charge_current = charge_current * axp->data->ccc_scale +
-		axp->data->ccc_offset;
+	if (axp->data->ccc_table)
+		charge_current = axp->data->ccc_table[charge_current];
+	else
+		charge_current = charge_current * axp->data->ccc_scale + axp->data->ccc_offset;
 
 	if (charge_current > axp->max_ccc)
 		dev_warn(axp->dev,
@@ -629,7 +653,12 @@  static int axp20x_power_probe(struct platform_device *pdev)
 								   ccc)) {
 			dev_err(&pdev->dev,
 				"couldn't set constant charge current from DT: fallback to minimum value\n");
-			ccc = 300000;
+
+			if (axp20x_batt->data->ccc_table)
+				ccc = axp20x_batt->data->ccc_table[0];
+			else
+				ccc = axp20x_batt->data->ccc_offset;
+
 			axp20x_batt->max_ccc = ccc;
 			axp20x_set_constant_charge_current(axp20x_batt, ccc);
 		}