From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Sun, 2 Dec 2012 12:37:00 +0000 (+0900)
Subject: ASoC: adsp: Keep ADSP2 memory powered off when not in use
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=10a2b662c4b49e91a09e225071d3c3508cd6ee83;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

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

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>
---

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index a41742da20cb..3a8d75bfb0b1 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -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)) {