Add optional interrupt support to the da9210 regulator driver, to handle over-current, under-voltage, and over-temperature events.
Only the interrupt sources for which we handle events are unmasked, to avoid interrupts we cannot handle. Signed-off-by: Geert Uytterhoeven <[email protected]> Cc: [email protected] --- - I do not have access to the da9210 datasheet, but looked at the da9211 driver, hence the RFC status, - Does there exist any regulator notifier event that corresponds to DA9210_E_VMAX? --- .../devicetree/bindings/regulator/da9210.txt | 4 ++ drivers/regulator/da9210-regulator.c | 63 ++++++++++++++++++++++ 2 files changed, 67 insertions(+) diff --git a/Documentation/devicetree/bindings/regulator/da9210.txt b/Documentation/devicetree/bindings/regulator/da9210.txt index 3297c53cb9152395..7aa9b1fa6b21ca18 100644 --- a/Documentation/devicetree/bindings/regulator/da9210.txt +++ b/Documentation/devicetree/bindings/regulator/da9210.txt @@ -5,6 +5,10 @@ Required properties: - compatible: must be "dlg,da9210" - reg: the i2c slave address of the regulator. It should be 0x68. +Optional properties: + +- interrupts: a reference to the DA9210 interrupt, if available. + Any standard regulator properties can be used to configure the single da9210 DCDC. diff --git a/drivers/regulator/da9210-regulator.c b/drivers/regulator/da9210-regulator.c index f0489cb9018b4e78..2c60a2d6f3a7a080 100644 --- a/drivers/regulator/da9210-regulator.c +++ b/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 +122,43 @@ 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; + 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); + if (val & DA9210_E_NPWRGOOD) + regulator_notifier_call_chain(chip->rdev, + REGULATOR_EVENT_UNDER_VOLTAGE, + NULL); + if (val & (DA9210_E_TEMP_WARN | DA9210_E_TEMP_CRIT)) + regulator_notifier_call_chain(chip->rdev, + REGULATOR_EVENT_OVER_TEMP, NULL); + if (val) { + /* Clear all events */ + error = regmap_write(chip->regmap, DA9210_REG_EVENT_B, val); + 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 +207,30 @@ 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, 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); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
