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path: root/drivers/power/supply/axp20x_ac_power.c
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Diffstat (limited to 'drivers/power/supply/axp20x_ac_power.c')
-rw-r--r--drivers/power/supply/axp20x_ac_power.c131
1 files changed, 107 insertions, 24 deletions
diff --git a/drivers/power/supply/axp20x_ac_power.c b/drivers/power/supply/axp20x_ac_power.c
index 0d34a932b6d5..ac360016b08a 100644
--- a/drivers/power/supply/axp20x_ac_power.c
+++ b/drivers/power/supply/axp20x_ac_power.c
@@ -15,6 +15,7 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
+#include <linux/pm.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/slab.h>
@@ -23,6 +24,9 @@
#define AXP20X_PWR_STATUS_ACIN_PRESENT BIT(7)
#define AXP20X_PWR_STATUS_ACIN_AVAIL BIT(6)
+#define AXP813_ACIN_PATH_SEL BIT(7)
+#define AXP813_ACIN_PATH_SEL_TO_BIT(x) (!!(x) << 7)
+
#define AXP813_VHOLD_MASK GENMASK(5, 3)
#define AXP813_VHOLD_UV_TO_BIT(x) ((((x) / 100000) - 40) << 3)
#define AXP813_VHOLD_REG_TO_UV(x) \
@@ -40,6 +44,9 @@ struct axp20x_ac_power {
struct power_supply *supply;
struct iio_channel *acin_v;
struct iio_channel *acin_i;
+ bool has_acin_path_sel;
+ unsigned int num_irqs;
+ unsigned int irqs[];
};
static irqreturn_t axp20x_ac_power_irq(int irq, void *devid)
@@ -86,6 +93,17 @@ static int axp20x_ac_power_get_property(struct power_supply *psy,
return ret;
val->intval = !!(reg & AXP20X_PWR_STATUS_ACIN_AVAIL);
+
+ /* ACIN_PATH_SEL disables ACIN even if ACIN_AVAIL is set. */
+ if (val->intval && power->has_acin_path_sel) {
+ ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL,
+ &reg);
+ if (ret)
+ return ret;
+
+ val->intval = !!(reg & AXP813_ACIN_PATH_SEL);
+ }
+
return 0;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
@@ -143,6 +161,11 @@ static int axp813_ac_power_set_property(struct power_supply *psy,
struct axp20x_ac_power *power = power_supply_get_drvdata(psy);
switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL,
+ AXP813_ACIN_PATH_SEL,
+ AXP813_ACIN_PATH_SEL_TO_BIT(val->intval));
+
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
if (val->intval < 4000000 || val->intval > 4700000)
return -EINVAL;
@@ -169,7 +192,8 @@ static int axp813_ac_power_set_property(struct power_supply *psy,
static int axp813_ac_power_prop_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
- return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN ||
+ return psp == POWER_SUPPLY_PROP_ONLINE ||
+ psp == POWER_SUPPLY_PROP_VOLTAGE_MIN ||
psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT;
}
@@ -221,34 +245,86 @@ static const struct power_supply_desc axp813_ac_power_desc = {
.set_property = axp813_ac_power_set_property,
};
+static const char * const axp20x_irq_names[] = {
+ "ACIN_PLUGIN",
+ "ACIN_REMOVAL",
+};
+
struct axp_data {
const struct power_supply_desc *power_desc;
+ const char * const *irq_names;
+ unsigned int num_irq_names;
bool acin_adc;
+ bool acin_path_sel;
};
static const struct axp_data axp20x_data = {
- .power_desc = &axp20x_ac_power_desc,
- .acin_adc = true,
+ .power_desc = &axp20x_ac_power_desc,
+ .irq_names = axp20x_irq_names,
+ .num_irq_names = ARRAY_SIZE(axp20x_irq_names),
+ .acin_adc = true,
+ .acin_path_sel = false,
};
static const struct axp_data axp22x_data = {
- .power_desc = &axp22x_ac_power_desc,
- .acin_adc = false,
+ .power_desc = &axp22x_ac_power_desc,
+ .irq_names = axp20x_irq_names,
+ .num_irq_names = ARRAY_SIZE(axp20x_irq_names),
+ .acin_adc = false,
+ .acin_path_sel = false,
};
static const struct axp_data axp813_data = {
- .power_desc = &axp813_ac_power_desc,
- .acin_adc = false,
+ .power_desc = &axp813_ac_power_desc,
+ .irq_names = axp20x_irq_names,
+ .num_irq_names = ARRAY_SIZE(axp20x_irq_names),
+ .acin_adc = false,
+ .acin_path_sel = true,
};
+#ifdef CONFIG_PM_SLEEP
+static int axp20x_ac_power_suspend(struct device *dev)
+{
+ struct axp20x_ac_power *power = dev_get_drvdata(dev);
+ int i = 0;
+
+ /*
+ * Allow wake via ACIN_PLUGIN only.
+ *
+ * As nested threaded IRQs are not automatically disabled during
+ * suspend, we must explicitly disable the remainder of the IRQs.
+ */
+ if (device_may_wakeup(&power->supply->dev))
+ enable_irq_wake(power->irqs[i++]);
+ while (i < power->num_irqs)
+ disable_irq(power->irqs[i++]);
+
+ return 0;
+}
+
+static int axp20x_ac_power_resume(struct device *dev)
+{
+ struct axp20x_ac_power *power = dev_get_drvdata(dev);
+ int i = 0;
+
+ if (device_may_wakeup(&power->supply->dev))
+ disable_irq_wake(power->irqs[i++]);
+ while (i < power->num_irqs)
+ enable_irq(power->irqs[i++]);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(axp20x_ac_power_pm_ops, axp20x_ac_power_suspend,
+ axp20x_ac_power_resume);
+
static int axp20x_ac_power_probe(struct platform_device *pdev)
{
struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
struct power_supply_config psy_cfg = {};
struct axp20x_ac_power *power;
const struct axp_data *axp_data;
- static const char * const irq_names[] = { "ACIN_PLUGIN", "ACIN_REMOVAL",
- NULL };
int i, irq, ret;
if (!of_device_is_available(pdev->dev.of_node))
@@ -259,12 +335,14 @@ static int axp20x_ac_power_probe(struct platform_device *pdev)
return -EINVAL;
}
- power = devm_kzalloc(&pdev->dev, sizeof(*power), GFP_KERNEL);
+ axp_data = of_device_get_match_data(&pdev->dev);
+
+ power = devm_kzalloc(&pdev->dev,
+ struct_size(power, irqs, axp_data->num_irq_names),
+ GFP_KERNEL);
if (!power)
return -ENOMEM;
- axp_data = of_device_get_match_data(&pdev->dev);
-
if (axp_data->acin_adc) {
power->acin_v = devm_iio_channel_get(&pdev->dev, "acin_v");
if (IS_ERR(power->acin_v)) {
@@ -282,6 +360,8 @@ static int axp20x_ac_power_probe(struct platform_device *pdev)
}
power->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+ power->has_acin_path_sel = axp_data->acin_path_sel;
+ power->num_irqs = axp_data->num_irq_names;
platform_set_drvdata(pdev, power);
@@ -295,20 +375,22 @@ static int axp20x_ac_power_probe(struct platform_device *pdev)
return PTR_ERR(power->supply);
/* Request irqs after registering, as irqs may trigger immediately */
- for (i = 0; irq_names[i]; i++) {
- irq = platform_get_irq_byname(pdev, irq_names[i]);
+ for (i = 0; i < axp_data->num_irq_names; i++) {
+ irq = platform_get_irq_byname(pdev, axp_data->irq_names[i]);
if (irq < 0) {
- dev_warn(&pdev->dev, "No IRQ for %s: %d\n",
- irq_names[i], irq);
- continue;
+ dev_err(&pdev->dev, "No IRQ for %s: %d\n",
+ axp_data->irq_names[i], irq);
+ return irq;
}
- irq = regmap_irq_get_virq(axp20x->regmap_irqc, irq);
- ret = devm_request_any_context_irq(&pdev->dev, irq,
+ power->irqs[i] = regmap_irq_get_virq(axp20x->regmap_irqc, irq);
+ ret = devm_request_any_context_irq(&pdev->dev, power->irqs[i],
axp20x_ac_power_irq, 0,
DRVNAME, power);
- if (ret < 0)
- dev_warn(&pdev->dev, "Error requesting %s IRQ: %d\n",
- irq_names[i], ret);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Error requesting %s IRQ: %d\n",
+ axp_data->irq_names[i], ret);
+ return ret;
+ }
}
return 0;
@@ -331,8 +413,9 @@ MODULE_DEVICE_TABLE(of, axp20x_ac_power_match);
static struct platform_driver axp20x_ac_power_driver = {
.probe = axp20x_ac_power_probe,
.driver = {
- .name = DRVNAME,
- .of_match_table = axp20x_ac_power_match,
+ .name = DRVNAME,
+ .of_match_table = axp20x_ac_power_match,
+ .pm = &axp20x_ac_power_pm_ops,
},
};
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.