diff options
| -rw-r--r-- | drivers/mfd/wm831x-core.c | 47 | ||||
| -rw-r--r-- | include/linux/mfd/wm831x/core.h | 5 |
2 files changed, 50 insertions, 2 deletions
diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c index da00ca9e0c71..1a968f34d679 100644 --- a/drivers/mfd/wm831x-core.c +++ b/drivers/mfd/wm831x-core.c @@ -1494,6 +1494,7 @@ static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq) case WM8310: parent = WM8310; wm831x->num_gpio = 16; + wm831x->charger_irq_wake = 1; if (rev > 0) { wm831x->has_gpio_ena = 1; wm831x->has_cs_sts = 1; @@ -1505,6 +1506,7 @@ static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq) case WM8311: parent = WM8311; wm831x->num_gpio = 16; + wm831x->charger_irq_wake = 1; if (rev > 0) { wm831x->has_gpio_ena = 1; wm831x->has_cs_sts = 1; @@ -1516,6 +1518,7 @@ static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq) case WM8312: parent = WM8312; wm831x->num_gpio = 16; + wm831x->charger_irq_wake = 1; if (rev > 0) { wm831x->has_gpio_ena = 1; wm831x->has_cs_sts = 1; @@ -1654,6 +1657,42 @@ static void wm831x_device_exit(struct wm831x *wm831x) kfree(wm831x); } +static int wm831x_device_suspend(struct wm831x *wm831x) +{ + int reg, mask; + + /* If the charger IRQs are a wake source then make sure we ack + * them even if they're not actively being used (eg, no power + * driver or no IRQ line wired up) then acknowledge the + * interrupts otherwise suspend won't last very long. + */ + if (wm831x->charger_irq_wake) { + reg = wm831x_reg_read(wm831x, WM831X_INTERRUPT_STATUS_2_MASK); + + mask = WM831X_CHG_BATT_HOT_EINT | + WM831X_CHG_BATT_COLD_EINT | + WM831X_CHG_BATT_FAIL_EINT | + WM831X_CHG_OV_EINT | WM831X_CHG_END_EINT | + WM831X_CHG_TO_EINT | WM831X_CHG_MODE_EINT | + WM831X_CHG_START_EINT; + + /* If any of the interrupts are masked read the statuses */ + if (reg & mask) + reg = wm831x_reg_read(wm831x, + WM831X_INTERRUPT_STATUS_2); + + if (reg & mask) { + dev_info(wm831x->dev, + "Acknowledging masked charger IRQs: %x\n", + reg & mask); + wm831x_reg_write(wm831x, WM831X_INTERRUPT_STATUS_2, + reg & mask); + } + } + + return 0; +} + static int wm831x_i2c_read_device(struct wm831x *wm831x, unsigned short reg, int bytes, void *dest) { @@ -1728,6 +1767,13 @@ static int wm831x_i2c_remove(struct i2c_client *i2c) return 0; } +static int wm831x_i2c_suspend(struct i2c_client *i2c, pm_message_t mesg) +{ + struct wm831x *wm831x = i2c_get_clientdata(i2c); + + return wm831x_device_suspend(wm831x); +} + static const struct i2c_device_id wm831x_i2c_id[] = { { "wm8310", WM8310 }, { "wm8311", WM8311 }, @@ -1745,6 +1791,7 @@ static struct i2c_driver wm831x_i2c_driver = { }, .probe = wm831x_i2c_probe, .remove = wm831x_i2c_remove, + .suspend = wm831x_i2c_suspend, .id_table = wm831x_i2c_id, }; diff --git a/include/linux/mfd/wm831x/core.h b/include/linux/mfd/wm831x/core.h index 5915f6e3d9ab..eb5bd4e0e03c 100644 --- a/include/linux/mfd/wm831x/core.h +++ b/include/linux/mfd/wm831x/core.h @@ -256,8 +256,9 @@ struct wm831x { int irq_masks_cache[WM831X_NUM_IRQ_REGS]; /* Cached hardware value */ /* Chip revision based flags */ - unsigned has_gpio_ena:1; /* Has GPIO enable bit */ - unsigned has_cs_sts:1; /* Has current sink status bit */ + unsigned has_gpio_ena:1; /* Has GPIO enable bit */ + unsigned has_cs_sts:1; /* Has current sink status bit */ + unsigned charger_irq_wake:1; /* Are charger IRQs a wake source? */ int num_gpio; |