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ASoC: adsp: Keep ADSP2 memory powered off when not in use

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Turn off the ADSP memory when we aren't using it, saving a small amount of
power.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2012-12-02 21:37:00 +09:00
parent e436cadd65
commit 10a2b662c4
1 changed files with 11 additions and 0 deletions
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11
sound/soc/codecs/wm_adsp.c
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@ -629,6 +629,17 @@ int wm_adsp2_init(struct wm_adsp *adsp, bool dvfs)
{
int ret;
/*
* Disable the DSP memory by default when in reset for a small
* power saving.
*/
ret = regmap_update_bits(adsp->regmap, adsp->base + ADSP2_CONTROL,
ADSP2_MEM_ENA, 0);
if (ret != 0) {
adsp_err(adsp, "Failed to clear memory retention: %d\n", ret);
return ret;
}
if (dvfs) {
adsp->dvfs = devm_regulator_get(adsp->dev, "DCVDD");
if (IS_ERR(adsp->dvfs)) {