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Diffstat (limited to 'kernel/drivers/regulator/da9210-regulator.c')
-rw-r--r--kernel/drivers/regulator/da9210-regulator.c76
1 files changed, 75 insertions, 1 deletions
diff --git a/kernel/drivers/regulator/da9210-regulator.c b/kernel/drivers/regulator/da9210-regulator.c
index f0489cb90..b3517830e 100644
--- a/kernel/drivers/regulator/da9210-regulator.c
+++ b/kernel/drivers/regulator/da9210-regulator.c
@@ -22,6 +22,8 @@
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
#include <linux/slab.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
@@ -120,6 +122,55 @@ static int da9210_get_current_limit(struct regulator_dev *rdev)
return da9210_buck_limits[sel];
}
+static irqreturn_t da9210_irq_handler(int irq, void *data)
+{
+ struct da9210 *chip = data;
+ unsigned int val, handled = 0;
+ int error, ret = IRQ_NONE;
+
+ error = regmap_read(chip->regmap, DA9210_REG_EVENT_B, &val);
+ if (error < 0)
+ goto error_i2c;
+
+ if (val & DA9210_E_OVCURR) {
+ regulator_notifier_call_chain(chip->rdev,
+ REGULATOR_EVENT_OVER_CURRENT,
+ NULL);
+ handled |= DA9210_E_OVCURR;
+ }
+ if (val & DA9210_E_NPWRGOOD) {
+ regulator_notifier_call_chain(chip->rdev,
+ REGULATOR_EVENT_UNDER_VOLTAGE,
+ NULL);
+ handled |= DA9210_E_NPWRGOOD;
+ }
+ if (val & (DA9210_E_TEMP_WARN | DA9210_E_TEMP_CRIT)) {
+ regulator_notifier_call_chain(chip->rdev,
+ REGULATOR_EVENT_OVER_TEMP, NULL);
+ handled |= val & (DA9210_E_TEMP_WARN | DA9210_E_TEMP_CRIT);
+ }
+ if (val & DA9210_E_VMAX) {
+ regulator_notifier_call_chain(chip->rdev,
+ REGULATOR_EVENT_REGULATION_OUT,
+ NULL);
+ handled |= DA9210_E_VMAX;
+ }
+ if (handled) {
+ /* Clear handled events */
+ error = regmap_write(chip->regmap, DA9210_REG_EVENT_B, handled);
+ if (error < 0)
+ goto error_i2c;
+
+ ret = IRQ_HANDLED;
+ }
+
+ return ret;
+
+error_i2c:
+ dev_err(regmap_get_device(chip->regmap), "I2C error : %d\n", error);
+ return ret;
+}
+
/*
* I2C driver interface functions
*/
@@ -168,6 +219,30 @@ static int da9210_i2c_probe(struct i2c_client *i2c,
}
chip->rdev = rdev;
+ if (i2c->irq) {
+ error = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
+ da9210_irq_handler,
+ IRQF_TRIGGER_LOW |
+ IRQF_ONESHOT | IRQF_SHARED,
+ "da9210", chip);
+ if (error) {
+ dev_err(&i2c->dev, "Failed to request IRQ%u: %d\n",
+ i2c->irq, error);
+ return error;
+ }
+
+ error = regmap_update_bits(chip->regmap, DA9210_REG_MASK_B,
+ DA9210_M_OVCURR | DA9210_M_NPWRGOOD |
+ DA9210_M_TEMP_WARN |
+ DA9210_M_TEMP_CRIT | DA9210_M_VMAX, 0);
+ if (error < 0) {
+ dev_err(&i2c->dev, "Failed to update mask reg: %d\n",
+ error);
+ return error;
+ }
+ } else {
+ dev_warn(&i2c->dev, "No IRQ configured\n");
+ }
i2c_set_clientdata(i2c, chip);
@@ -184,7 +259,6 @@ MODULE_DEVICE_TABLE(i2c, da9210_i2c_id);
static struct i2c_driver da9210_regulator_driver = {
.driver = {
.name = "da9210",
- .owner = THIS_MODULE,
},
.probe = da9210_i2c_probe,
.id_table = da9210_i2c_id,