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power: supply: axp20x_usb_power: Add support for AXP717
Add support for the AXP717 PMIC. The AXP717 PMIC allows for detection of USB type like the AXP813, but has little in common otherwise with the other AXP PMICs. The USB charger is able to provide between 100000uA and 3250000uA of power, and can measure the VBUS input in mV with up to 14 bits of precision. Tested-by: Philippe Simons <[email protected]> Signed-off-by: Chris Morgan <[email protected]> Acked-by: Jonathan Cameron <[email protected]> Acked-by: Krzysztof Kozlowski <[email protected]> Link: https://lore.kernel.org/r/[email protected] [fix axp717_usb_power_desc.usb_types] Signed-off-by: Sebastian Reichel <[email protected]>
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‎drivers/power/supply/axp20x_usb_power.c‎

Lines changed: 246 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -30,15 +30,26 @@
3030
#define AXP20X_PWR_STATUS_VBUS_PRESENT BIT(5)
3131
#define AXP20X_PWR_STATUS_VBUS_USED BIT(4)
3232

33+
#define AXP717_PWR_STATUS_VBUS_GOOD BIT(5)
34+
3335
#define AXP20X_USB_STATUS_VBUS_VALID BIT(2)
3436

37+
#define AXP717_PMU_FAULT_VBUS BIT(5)
38+
#define AXP717_PMU_FAULT_VSYS BIT(3)
39+
3540
#define AXP20X_VBUS_VHOLD_uV(b) (4000000 + (((b) >> 3) & 7) * 100000)
3641
#define AXP20X_VBUS_VHOLD_MASK GENMASK(5, 3)
3742
#define AXP20X_VBUS_VHOLD_OFFSET 3
3843

3944
#define AXP20X_ADC_EN1_VBUS_CURR BIT(2)
4045
#define AXP20X_ADC_EN1_VBUS_VOLT BIT(3)
4146

47+
#define AXP717_INPUT_VOL_LIMIT_MASK GENMASK(3, 0)
48+
#define AXP717_INPUT_CUR_LIMIT_MASK GENMASK(5, 0)
49+
#define AXP717_ADC_DATA_MASK GENMASK(14, 0)
50+
51+
#define AXP717_ADC_EN_VBUS_VOLT BIT(2)
52+
4253
/*
4354
* Note do not raise the debounce time, we must report Vusb high within
4455
* 100ms otherwise we get Vbus errors in musb.
@@ -143,6 +154,24 @@ static void axp20x_usb_power_poll_vbus(struct work_struct *work)
143154
mod_delayed_work(system_power_efficient_wq, &power->vbus_detect, DEBOUNCE_TIME);
144155
}
145156

157+
static void axp717_usb_power_poll_vbus(struct work_struct *work)
158+
{
159+
struct axp20x_usb_power *power =
160+
container_of(work, struct axp20x_usb_power, vbus_detect.work);
161+
unsigned int val;
162+
int ret;
163+
164+
ret = regmap_read(power->regmap, AXP717_ON_INDICATE, &val);
165+
if (ret)
166+
return;
167+
168+
val &= AXP717_PWR_STATUS_VBUS_GOOD;
169+
if (val != power->old_status)
170+
power_supply_changed(power->supply);
171+
172+
power->old_status = val;
173+
}
174+
146175
static int axp20x_get_usb_type(struct axp20x_usb_power *power,
147176
union power_supply_propval *val)
148177
{
@@ -288,6 +317,91 @@ static int axp20x_usb_power_get_property(struct power_supply *psy,
288317
return 0;
289318
}
290319

320+
static int axp717_usb_power_get_property(struct power_supply *psy,
321+
enum power_supply_property psp, union power_supply_propval *val)
322+
{
323+
struct axp20x_usb_power *power = power_supply_get_drvdata(psy);
324+
unsigned int v;
325+
int ret;
326+
327+
switch (psp) {
328+
case POWER_SUPPLY_PROP_HEALTH:
329+
val->intval = POWER_SUPPLY_HEALTH_GOOD;
330+
ret = regmap_read(power->regmap, AXP717_ON_INDICATE, &v);
331+
if (ret)
332+
return ret;
333+
334+
if (!(v & AXP717_PWR_STATUS_VBUS_GOOD))
335+
val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
336+
337+
ret = regmap_read(power->regmap, AXP717_PMU_FAULT_VBUS, &v);
338+
if (ret)
339+
return ret;
340+
341+
v &= (AXP717_PMU_FAULT_VBUS | AXP717_PMU_FAULT_VSYS);
342+
if (v) {
343+
val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
344+
regmap_write(power->regmap, AXP717_PMU_FAULT_VBUS, v);
345+
}
346+
347+
break;
348+
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
349+
ret = regmap_read(power->regmap, AXP717_INPUT_CUR_LIMIT_CTRL, &v);
350+
if (ret)
351+
return ret;
352+
353+
/* 50ma step size with 100ma offset. */
354+
v &= AXP717_INPUT_CUR_LIMIT_MASK;
355+
val->intval = (v * 50000) + 100000;
356+
break;
357+
case POWER_SUPPLY_PROP_ONLINE:
358+
case POWER_SUPPLY_PROP_PRESENT:
359+
ret = regmap_read(power->regmap, AXP717_ON_INDICATE, &v);
360+
if (ret)
361+
return ret;
362+
val->intval = !!(v & AXP717_PWR_STATUS_VBUS_GOOD);
363+
break;
364+
case POWER_SUPPLY_PROP_USB_TYPE:
365+
return axp20x_get_usb_type(power, val);
366+
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
367+
ret = regmap_read(power->regmap, AXP717_INPUT_VOL_LIMIT_CTRL, &v);
368+
if (ret)
369+
return ret;
370+
371+
/* 80mv step size with 3.88v offset. */
372+
v &= AXP717_INPUT_VOL_LIMIT_MASK;
373+
val->intval = (v * 80000) + 3880000;
374+
break;
375+
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
376+
if (IS_ENABLED(CONFIG_AXP20X_ADC)) {
377+
ret = iio_read_channel_processed(power->vbus_v,
378+
&val->intval);
379+
if (ret)
380+
return ret;
381+
382+
/*
383+
* IIO framework gives mV but Power Supply framework
384+
* gives uV.
385+
*/
386+
val->intval *= 1000;
387+
return 0;
388+
}
389+
390+
ret = axp20x_read_variable_width(power->regmap,
391+
AXP717_VBUS_V_H, 16);
392+
if (ret < 0)
393+
return ret;
394+
395+
val->intval = (ret % AXP717_ADC_DATA_MASK) * 1000;
396+
break;
397+
default:
398+
return -EINVAL;
399+
}
400+
401+
return 0;
402+
403+
}
404+
291405
static int axp20x_usb_power_set_voltage_min(struct axp20x_usb_power *power,
292406
int intval)
293407
{
@@ -314,6 +428,22 @@ static int axp20x_usb_power_set_voltage_min(struct axp20x_usb_power *power,
314428
return -EINVAL;
315429
}
316430

431+
static int axp717_usb_power_set_voltage_min(struct axp20x_usb_power *power,
432+
int intval)
433+
{
434+
int val;
435+
436+
/* Minimum value of 3.88v and maximum of 5.08v. */
437+
if (intval < 3880000 || intval > 5080000)
438+
return -EINVAL;
439+
440+
/* step size of 80ma with 3.88v offset. */
441+
val = (intval - 3880000) / 80000;
442+
return regmap_update_bits(power->regmap,
443+
AXP717_INPUT_VOL_LIMIT_CTRL,
444+
AXP717_INPUT_VOL_LIMIT_MASK, val);
445+
}
446+
317447
static int axp20x_usb_power_set_input_current_limit(struct axp20x_usb_power *power,
318448
int intval)
319449
{
@@ -354,6 +484,29 @@ static int axp20x_usb_power_set_input_current_limit(struct axp20x_usb_power *pow
354484
return regmap_field_write(power->curr_lim_fld, reg);
355485
}
356486

487+
static int axp717_usb_power_set_input_current_limit(struct axp20x_usb_power *power,
488+
int intval)
489+
{
490+
int tmp;
491+
492+
/* Minimum value of 100mA and maximum value of 3.25A*/
493+
if (intval < 100000 || intval > 3250000)
494+
return -EINVAL;
495+
496+
if (power->max_input_cur && (intval > power->max_input_cur)) {
497+
dev_warn(power->dev,
498+
"reqested current %d clamped to max current %d\n",
499+
intval, power->max_input_cur);
500+
intval = power->max_input_cur;
501+
}
502+
503+
/* Minimum value of 100mA with step size of 50mA. */
504+
tmp = (intval - 100000) / 50000;
505+
return regmap_update_bits(power->regmap,
506+
AXP717_INPUT_CUR_LIMIT_CTRL,
507+
AXP717_INPUT_CUR_LIMIT_MASK, tmp);
508+
}
509+
357510
static int axp20x_usb_power_set_property(struct power_supply *psy,
358511
enum power_supply_property psp,
359512
const union power_supply_propval *val)
@@ -376,6 +529,24 @@ static int axp20x_usb_power_set_property(struct power_supply *psy,
376529
default:
377530
return -EINVAL;
378531
}
532+
}
533+
534+
static int axp717_usb_power_set_property(struct power_supply *psy,
535+
enum power_supply_property psp,
536+
const union power_supply_propval *val)
537+
{
538+
struct axp20x_usb_power *power = power_supply_get_drvdata(psy);
539+
540+
switch (psp) {
541+
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
542+
return axp717_usb_power_set_input_current_limit(power, val->intval);
543+
544+
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
545+
return axp717_usb_power_set_voltage_min(power, val->intval);
546+
547+
default:
548+
return -EINVAL;
549+
}
379550

380551
return -EINVAL;
381552
}
@@ -399,6 +570,13 @@ static int axp20x_usb_power_prop_writeable(struct power_supply *psy,
399570
psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT;
400571
}
401572

573+
static int axp717_usb_power_prop_writeable(struct power_supply *psy,
574+
enum power_supply_property psp)
575+
{
576+
return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN ||
577+
psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT;
578+
}
579+
402580
static int axp20x_configure_iio_channels(struct platform_device *pdev,
403581
struct axp20x_usb_power *power)
404582
{
@@ -419,6 +597,19 @@ static int axp20x_configure_iio_channels(struct platform_device *pdev,
419597
return 0;
420598
}
421599

600+
static int axp717_configure_iio_channels(struct platform_device *pdev,
601+
struct axp20x_usb_power *power)
602+
{
603+
power->vbus_v = devm_iio_channel_get(&pdev->dev, "vbus_v");
604+
if (IS_ERR(power->vbus_v)) {
605+
if (PTR_ERR(power->vbus_v) == -ENODEV)
606+
return -EPROBE_DEFER;
607+
return PTR_ERR(power->vbus_v);
608+
}
609+
610+
return 0;
611+
}
612+
422613
static int axp20x_configure_adc_registers(struct axp20x_usb_power *power)
423614
{
424615
/* Enable vbus voltage and current measurement */
@@ -429,6 +620,14 @@ static int axp20x_configure_adc_registers(struct axp20x_usb_power *power)
429620
AXP20X_ADC_EN1_VBUS_VOLT);
430621
}
431622

623+
static int axp717_configure_adc_registers(struct axp20x_usb_power *power)
624+
{
625+
/* Enable vbus voltage measurement */
626+
return regmap_update_bits(power->regmap, AXP717_ADC_CH_EN_CONTROL,
627+
AXP717_ADC_EN_VBUS_VOLT,
628+
AXP717_ADC_EN_VBUS_VOLT);
629+
}
630+
432631
static enum power_supply_property axp20x_usb_power_properties[] = {
433632
POWER_SUPPLY_PROP_HEALTH,
434633
POWER_SUPPLY_PROP_PRESENT,
@@ -447,6 +646,16 @@ static enum power_supply_property axp22x_usb_power_properties[] = {
447646
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
448647
};
449648

649+
static enum power_supply_property axp717_usb_power_properties[] = {
650+
POWER_SUPPLY_PROP_HEALTH,
651+
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
652+
POWER_SUPPLY_PROP_ONLINE,
653+
POWER_SUPPLY_PROP_PRESENT,
654+
POWER_SUPPLY_PROP_USB_TYPE,
655+
POWER_SUPPLY_PROP_VOLTAGE_MIN,
656+
POWER_SUPPLY_PROP_VOLTAGE_NOW,
657+
};
658+
450659
static enum power_supply_property axp813_usb_power_properties[] = {
451660
POWER_SUPPLY_PROP_HEALTH,
452661
POWER_SUPPLY_PROP_PRESENT,
@@ -476,6 +685,20 @@ static const struct power_supply_desc axp22x_usb_power_desc = {
476685
.set_property = axp20x_usb_power_set_property,
477686
};
478687

688+
static const struct power_supply_desc axp717_usb_power_desc = {
689+
.name = "axp20x-usb",
690+
.type = POWER_SUPPLY_TYPE_USB,
691+
.properties = axp717_usb_power_properties,
692+
.num_properties = ARRAY_SIZE(axp717_usb_power_properties),
693+
.property_is_writeable = axp717_usb_power_prop_writeable,
694+
.get_property = axp717_usb_power_get_property,
695+
.set_property = axp717_usb_power_set_property,
696+
.usb_types = BIT(POWER_SUPPLY_USB_TYPE_SDP) |
697+
BIT(POWER_SUPPLY_USB_TYPE_CDP) |
698+
BIT(POWER_SUPPLY_USB_TYPE_DCP) |
699+
BIT(POWER_SUPPLY_USB_TYPE_UNKNOWN),
700+
};
701+
479702
static const struct power_supply_desc axp813_usb_power_desc = {
480703
.name = "axp20x-usb",
481704
.type = POWER_SUPPLY_TYPE_USB,
@@ -502,6 +725,12 @@ static const char * const axp22x_irq_names[] = {
502725
"VBUS_REMOVAL",
503726
};
504727

728+
static const char * const axp717_irq_names[] = {
729+
"VBUS_PLUGIN",
730+
"VBUS_REMOVAL",
731+
"VBUS_OVER_V",
732+
};
733+
505734
static int axp192_usb_curr_lim_table[] = {
506735
-1,
507736
-1,
@@ -589,6 +818,20 @@ static const struct axp_data axp223_data = {
589818
.axp20x_cfg_adc_reg = axp20x_configure_adc_registers,
590819
};
591820

821+
static const struct axp_data axp717_data = {
822+
.power_desc = &axp717_usb_power_desc,
823+
.irq_names = axp717_irq_names,
824+
.num_irq_names = ARRAY_SIZE(axp717_irq_names),
825+
.curr_lim_fld = REG_FIELD(AXP717_INPUT_CUR_LIMIT_CTRL, 0, 5),
826+
.usb_bc_en_bit = REG_FIELD(AXP717_MODULE_EN_CONTROL_1, 4, 4),
827+
.usb_bc_det_fld = REG_FIELD(AXP717_BC_DETECT, 5, 7),
828+
.vbus_mon_bit = REG_FIELD(AXP717_ADC_CH_EN_CONTROL, 2, 2),
829+
.vbus_needs_polling = false,
830+
.axp20x_read_vbus = &axp717_usb_power_poll_vbus,
831+
.axp20x_cfg_iio_chan = axp717_configure_iio_channels,
832+
.axp20x_cfg_adc_reg = axp717_configure_adc_registers,
833+
};
834+
592835
static const struct axp_data axp813_data = {
593836
.power_desc = &axp813_usb_power_desc,
594837
.irq_names = axp22x_irq_names,
@@ -816,6 +1059,9 @@ static const struct of_device_id axp20x_usb_power_match[] = {
8161059
}, {
8171060
.compatible = "x-powers,axp223-usb-power-supply",
8181061
.data = &axp223_data,
1062+
}, {
1063+
.compatible = "x-powers,axp717-usb-power-supply",
1064+
.data = &axp717_data,
8191065
}, {
8201066
.compatible = "x-powers,axp813-usb-power-supply",
8211067
.data = &axp813_data,

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