diff options
Diffstat (limited to 'drivers/mfd/wm8994-core.c')
| -rw-r--r-- | drivers/mfd/wm8994-core.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c index bfde4e8ec63..5d6ba132837 100644 --- a/drivers/mfd/wm8994-core.c +++ b/drivers/mfd/wm8994-core.c @@ -167,6 +167,18 @@ static struct mfd_cell wm8994_devs[] = { * and should be handled via the standard regulator API supply * management. */ +static const char *wm1811_main_supplies[] = { + "DBVDD1", + "DBVDD2", + "DBVDD3", + "DCVDD", + "AVDD1", + "AVDD2", + "CPVDD", + "SPKVDD1", + "SPKVDD2", +}; + static const char *wm8994_main_supplies[] = { "DBVDD", "DCVDD", @@ -205,6 +217,47 @@ static int wm8994_suspend(struct device *dev) return 0; } + ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_4); + if (ret < 0) { + dev_err(dev, "Failed to read power status: %d\n", ret); + } else if (ret & (WM8994_AIF2ADCL_ENA | WM8994_AIF2ADCR_ENA | + WM8994_AIF1ADC2L_ENA | WM8994_AIF1ADC2R_ENA | + WM8994_AIF1ADC1L_ENA | WM8994_AIF1ADC1R_ENA)) { + dev_dbg(dev, "CODEC still active, ignoring suspend\n"); + return 0; + } + + ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_5); + if (ret < 0) { + dev_err(dev, "Failed to read power status: %d\n", ret); + } else if (ret & (WM8994_AIF2DACL_ENA | WM8994_AIF2DACR_ENA | + WM8994_AIF1DAC2L_ENA | WM8994_AIF1DAC2R_ENA | + WM8994_AIF1DAC1L_ENA | WM8994_AIF1DAC1R_ENA)) { + dev_dbg(dev, "CODEC still active, ignoring suspend\n"); + return 0; + } + + switch (wm8994->type) { + case WM8958: + ret = wm8994_reg_read(wm8994, WM8958_MIC_DETECT_1); + if (ret < 0) { + dev_err(dev, "Failed to read power status: %d\n", ret); + } else if (ret & WM8958_MICD_ENA) { + dev_dbg(dev, "CODEC still active, ignoring suspend\n"); + return 0; + } + break; + default: + break; + } + + /* Disable LDO pulldowns while the device is suspended if we + * don't know that something will be driving them. */ + if (!wm8994->ldo_ena_always_driven) + wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, + WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD, + WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD); + /* GPIO configuration state is saved here since we may be configuring * the GPIO alternate functions even if we're not using the gpiolib * driver for them. @@ -274,6 +327,11 @@ static int wm8994_resume(struct device *dev) if (ret < 0) dev_err(dev, "Failed to restore GPIO registers: %d\n", ret); + /* Disable LDO pulldowns while the device is active */ + wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, + WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD, + 0); + wm8994->suspended = false; return 0; @@ -329,6 +387,9 @@ static int wm8994_device_init(struct wm8994 *wm8994, int irq) } switch (wm8994->type) { + case WM1811: + wm8994->num_supplies = ARRAY_SIZE(wm1811_main_supplies); + break; case WM8994: wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies); break; @@ -349,6 +410,10 @@ static int wm8994_device_init(struct wm8994 *wm8994, int irq) } switch (wm8994->type) { + case WM1811: + for (i = 0; i < ARRAY_SIZE(wm1811_main_supplies); i++) + wm8994->supplies[i].supply = wm1811_main_supplies[i]; + break; case WM8994: for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++) wm8994->supplies[i].supply = wm8994_main_supplies[i]; @@ -382,6 +447,13 @@ static int wm8994_device_init(struct wm8994 *wm8994, int irq) goto err_enable; } switch (ret) { + case 0x1811: + devname = "WM1811"; + if (wm8994->type != WM1811) + dev_warn(wm8994->dev, "Device registered as type %d\n", + wm8994->type); + wm8994->type = WM1811; + break; case 0x8994: devname = "WM8994"; if (wm8994->type != WM8994) @@ -441,8 +513,15 @@ static int wm8994_device_init(struct wm8994 *wm8994, int irq) pdata->gpio_defaults[i]); } } + + wm8994->ldo_ena_always_driven = pdata->ldo_ena_always_driven; } + /* Disable LDO pulldowns while the device is active */ + wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, + WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD, + 0); + /* In some system designs where the regulators are not in use, * we can achieve a small reduction in leakage currents by * floating LDO outputs. This bit makes no difference if the @@ -539,6 +618,7 @@ static int wm8994_i2c_remove(struct i2c_client *i2c) } static const struct i2c_device_id wm8994_i2c_id[] = { + { "wm1811", WM1811 }, { "wm8994", WM8994 }, { "wm8958", WM8958 }, { } |