diff options
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/wm8994-core.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c index 1f15743460a0..9b01a22c3e70 100644 --- a/drivers/mfd/wm8994-core.c +++ b/drivers/mfd/wm8994-core.c @@ -281,6 +281,40 @@ 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) |