diff options
Diffstat (limited to 'drivers/mfd/arizona-core.c')
| -rw-r--r-- | drivers/mfd/arizona-core.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c index b5a7e0efcf3e..c80ab7910615 100644 --- a/drivers/mfd/arizona-core.c +++ b/drivers/mfd/arizona-core.c @@ -378,6 +378,35 @@ err: return ret ?: err; } +/* + * Register patch to some of the CODECs internal write sequences + * to ensure a clean exit from the low power sleep state. + */ +static const struct reg_default wm5110_sleep_patch[] = { + { 0x337A, 0xC100 }, + { 0x337B, 0x0041 }, + { 0x3300, 0xA210 }, + { 0x3301, 0x050C }, +}; + +static int wm5110_apply_sleep_patch(struct arizona *arizona) +{ + struct arizona_sysclk_state state; + int err, ret; + + ret = arizona_enable_freerun_sysclk(arizona, &state); + if (ret) + return ret; + + ret = regmap_multi_reg_write_bypassed(arizona->regmap, + wm5110_sleep_patch, + ARRAY_SIZE(wm5110_sleep_patch)); + + err = arizona_disable_freerun_sysclk(arizona, &state); + + return ret ?: err; +} + static int wm5102_clear_write_sequencer(struct arizona *arizona) { int ret; @@ -966,6 +995,16 @@ int arizona_dev_init(struct arizona *arizona) goto err_reset; } break; + case WM5110: + case WM8280: + ret = wm5110_apply_sleep_patch(arizona); + if (ret) { + dev_err(arizona->dev, + "Failed to apply sleep patch: %d\n", + ret); + goto err_reset; + } + break; default: break; } |