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b=YeT9qLgzWH9iWfADpD4Td95JwXzdENTvGgl9rWzGvHqgBEoYOwUnwuSL6FvmRGGfjqjlJxaGf3Hys157boze8VdzLLDy17aOz3t3ExV4EQRC4tWhpOQoFBKglf/AmI1rhqUFDTqgO7o7pvNOePHiWFrQntU/1SNN9D993q/iPkg= Authentication-Results: gmail.com; dkim=none (message not signed) header.d=none;gmail.com; dmarc=none action=none header.from=maximintegrated.com; Received: from BYAPR11MB3382.namprd11.prod.outlook.com (2603:10b6:a03:7f::15) by SJ0PR11MB4798.namprd11.prod.outlook.com (2603:10b6:a03:2d5::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3977.25; Thu, 25 Mar 2021 03:36:35 +0000 Received: from BYAPR11MB3382.namprd11.prod.outlook.com ([fe80::cce5:1aa1:302f:a956]) by BYAPR11MB3382.namprd11.prod.outlook.com ([fe80::cce5:1aa1:302f:a956%5]) with mapi id 15.20.3977.025; Thu, 25 Mar 2021 03:36:35 +0000 From: Ryan Lee To: lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz, tiwai@suse.com, pierre-louis.bossart@linux.intel.com, kai.vehmanen@linux.intel.com, yung-chuan.liao@linux.intel.com, rander.wang@linux.intel.com, ryans.lee@maximintegrated.com, guennadi.liakhovetski@linux.intel.com, vkoul@kernel.org, yong.zhi@intel.com, judyhsiao@google.com, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/3] ASoC:codec:max98373: Changed amp shutdown register as volatile Date: Wed, 24 Mar 2021 20:35:53 -0700 Message-Id: <20210325033555.29377-1-ryans.lee@maximintegrated.com> X-Mailer: git-send-email 2.17.1 X-Originating-IP: [73.189.52.211] X-ClientProxiedBy: BY5PR04CA0001.namprd04.prod.outlook.com (2603:10b6:a03:1d0::11) To BYAPR11MB3382.namprd11.prod.outlook.com (2603:10b6:a03:7f::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (73.189.52.211) by BY5PR04CA0001.namprd04.prod.outlook.com (2603:10b6:a03:1d0::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3977.24 via Frontend Transport; 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Overheating, overcurrent can cause amp shutdown in hardware. 'regmap_write' compare register readback value before writing to avoid same value writing. 'regmap_read' just read cache not actual hardware value for the non-volatile register. When amp is internally shutdown by some reason, next 'AMP ON' command can be ignored because regmap think amp is already ON. Signed-off-by: Ryan Lee --- sound/soc/codecs/max98373-i2c.c | 1 + sound/soc/codecs/max98373-sdw.c | 1 + 2 files changed, 2 insertions(+) diff --git a/sound/soc/codecs/max98373-i2c.c b/sound/soc/codecs/max98373-i2c.c index 85f6865019d4..ddb6436835d7 100644 --- a/sound/soc/codecs/max98373-i2c.c +++ b/sound/soc/codecs/max98373-i2c.c @@ -446,6 +446,7 @@ static bool max98373_volatile_reg(struct device *dev, unsigned int reg) case MAX98373_R2054_MEAS_ADC_PVDD_CH_READBACK: case MAX98373_R2055_MEAS_ADC_THERM_CH_READBACK: case MAX98373_R20B6_BDE_CUR_STATE_READBACK: + case MAX98373_R20FF_GLOBAL_SHDN: case MAX98373_R21FF_REV_ID: return true; default: diff --git a/sound/soc/codecs/max98373-sdw.c b/sound/soc/codecs/max98373-sdw.c index d8c47667a9ea..f3a12205cd48 100644 --- a/sound/soc/codecs/max98373-sdw.c +++ b/sound/soc/codecs/max98373-sdw.c @@ -220,6 +220,7 @@ static bool max98373_volatile_reg(struct device *dev, unsigned int reg) case MAX98373_R2054_MEAS_ADC_PVDD_CH_READBACK: case MAX98373_R2055_MEAS_ADC_THERM_CH_READBACK: case MAX98373_R20B6_BDE_CUR_STATE_READBACK: + case MAX98373_R20FF_GLOBAL_SHDN: case MAX98373_R21FF_REV_ID: /* SoundWire Control Port Registers */ case MAX98373_R0040_SCP_INIT_STAT_1 ... MAX98373_R0070_SCP_FRAME_CTLR: