diff options
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/arizona-core.c | 50 |
1 files changed, 40 insertions, 10 deletions
diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c index f30d92538584..0df12995ed1b 100644 --- a/drivers/mfd/arizona-core.c +++ b/drivers/mfd/arizona-core.c @@ -344,6 +344,33 @@ err_fll: return err; } +static int wm5102_clear_write_sequencer(struct arizona *arizona) +{ + int ret; + + ret = regmap_write(arizona->regmap, ARIZONA_WRITE_SEQUENCER_CTRL_3, + 0x0); + if (ret) { + dev_err(arizona->dev, + "Failed to clear write sequencer state: %d\n", ret); + return ret; + } + + arizona_enable_reset(arizona); + regulator_disable(arizona->dcvdd); + + msleep(20); + + ret = regulator_enable(arizona->dcvdd); + if (ret) { + dev_err(arizona->dev, "Failed to re-enable DCVDD: %d\n", ret); + return ret; + } + arizona_disable_reset(arizona); + + return 0; +} + #ifdef CONFIG_PM static int arizona_runtime_resume(struct device *dev) { @@ -802,21 +829,24 @@ int arizona_dev_init(struct arizona *arizona) case WM5102: ret = regmap_read(arizona->regmap, ARIZONA_WRITE_SEQUENCER_CTRL_3, &val); - if (ret != 0) + if (ret) { dev_err(dev, "Failed to check write sequencer state: %d\n", ret); - else if (val & 0x01) - break; - /* Fall through */ - default: - ret = arizona_wait_for_boot(arizona); - if (ret != 0) { - dev_err(arizona->dev, - "Device failed initial boot: %d\n", ret); - goto err_reset; + } else if (val & 0x01) { + ret = wm5102_clear_write_sequencer(arizona); + if (ret) + return ret; } break; + default: + break; + } + + ret = arizona_wait_for_boot(arizona); + if (ret) { + dev_err(arizona->dev, "Device failed initial boot: %d\n", ret); + goto err_reset; } /* Read the device ID information & do device specific stuff */ |