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Wang" To: "brian.austin@cirrus.com" , "Paul.Handrigan@cirrus.com" , "lgirdwood@gmail.com" , "broonie@kernel.org" , "perex@perex.cz" , "tiwai@suse.com" , "alsa-devel@alsa-project.org" CC: "linux-kernel@vger.kernel.org" Subject: [PATCH V2] ASoC: cs42xx8: Add reset gpio handling Thread-Topic: [PATCH V2] ASoC: cs42xx8: Add reset gpio handling Thread-Index: AQHVC61KhRK4yyHpKUmTOTQMt0NP7g== Date: Thu, 16 May 2019 06:04:58 +0000 Message-ID: <95eb314ef6d47ee6581094a406516a6069278d56.1557986457.git.shengjiu.wang@nxp.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.21.0 x-clientproxiedby: HK0PR03CA0051.apcprd03.prod.outlook.com (2603:1096:203:52::15) To VE1PR04MB6479.eurprd04.prod.outlook.com (2603:10a6:803:11e::16) authentication-results: spf=none (sender IP is ) smtp.mailfrom=shengjiu.wang@nxp.com; x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [119.31.174.66] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 10cd056f-3263-45ef-033c-08d6d9c46d27 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600141)(711020)(4605104)(4618075)(2017052603328)(7193020);SRVR:VE1PR04MB6445; x-ms-traffictypediagnostic: VE1PR04MB6445: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:4125; x-forefront-prvs: 0039C6E5C5 x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(346002)(376002)(396003)(39860400002)(366004)(136003)(199004)(189003)(52116002)(86362001)(53936002)(36756003)(305945005)(7736002)(99286004)(4326008)(6512007)(50226002)(66066001)(5660300002)(8936002)(2201001)(71200400001)(71190400001)(81166006)(102836004)(118296001)(110136005)(8676002)(81156014)(316002)(2906002)(2616005)(66556008)(66946007)(73956011)(66476007)(64756008)(6116002)(6436002)(3846002)(6506007)(68736007)(386003)(186003)(478600001)(25786009)(14444005)(256004)(14454004)(6486002)(66446008)(476003)(26005)(486006)(2501003);DIR:OUT;SFP:1101;SCL:1;SRVR:VE1PR04MB6445;H:VE1PR04MB6479.eurprd04.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: PkhA9fBjphzzHpxRdGEkGO6zTns9MrUmtSkI1gC9S4fXNZM5VIFT9dYpNLBUxLGDNZ046pshtpflLjB4H7OD7LnNKI+/fXBkcl1gAH1GoNXkirnwbfudp2tRZ4TzGKjWNsRpUBlfSt6GTR8JOJPJgarcvtFwwVBgbD612MKMKUP0T5NdU96NtcH7dGoD/UhJ2ug9D0DxMePPBbpM6o5Irj+cROfN2IiIN8HN1p4FChTXui84KWDvXMw3mdsNKRtNx6z72MXWgaXQHH1zYntAYP2EMvfgBS+aOzOKegaxSNahT7YE8C8RBQv0/T+KRxzo2qBoXEH+0ftPS9XKAKztthSV/ozN+xPUeaQjvnsGxPdevUF/xUlK34IYITTz4eHMkVh0KxAr0aIv+6gKw5PxBRGCqsIpNhvithGx7Lz2ZHY= Content-Type: text/plain; charset="iso-8859-1" Content-ID: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 10cd056f-3263-45ef-033c-08d6d9c46d27 X-MS-Exchange-CrossTenant-originalarrivaltime: 16 May 2019 06:04:59.0542 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: VE1PR04MB6445 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Handle the reset GPIO and reset the device every time we start it. Signed-off-by: Shengjiu Wang --- Changes in v2 - use devm_gpiod_get_optional instead of of_get_named_gpio sound/soc/codecs/cs42xx8.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/sound/soc/codecs/cs42xx8.c b/sound/soc/codecs/cs42xx8.c index 28a4ac36c4f8..b377cddaf2e6 100644 --- a/sound/soc/codecs/cs42xx8.c +++ b/sound/soc/codecs/cs42xx8.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -45,6 +46,7 @@ struct cs42xx8_priv { bool slave_mode; unsigned long sysclk; u32 tx_channels; + struct gpio_desc *gpiod_reset; }; =20 /* -127.5dB to 0dB with step of 0.5dB */ @@ -467,6 +469,13 @@ int cs42xx8_probe(struct device *dev, struct regmap *r= egmap) return -EINVAL; } =20 + cs42xx8->gpiod_reset =3D devm_gpiod_get_optional(dev, "reset", + GPIOD_OUT_HIGH); + if (IS_ERR(cs42xx8->gpiod_reset)) + return PTR_ERR(cs42xx8->gpiod_reset); + + gpiod_set_value_cansleep(cs42xx8->gpiod_reset, 0); + cs42xx8->clk =3D devm_clk_get(dev, "mclk"); if (IS_ERR(cs42xx8->clk)) { dev_err(dev, "failed to get the clock: %ld\n", @@ -547,6 +556,8 @@ static int cs42xx8_runtime_resume(struct device *dev) return ret; } =20 + gpiod_set_value_cansleep(cs42xx8->gpiod_reset, 0); + ret =3D regulator_bulk_enable(ARRAY_SIZE(cs42xx8->supplies), cs42xx8->supplies); if (ret) { @@ -586,6 +597,8 @@ static int cs42xx8_runtime_suspend(struct device *dev) regulator_bulk_disable(ARRAY_SIZE(cs42xx8->supplies), cs42xx8->supplies); =20 + gpiod_set_value_cansleep(cs42xx8->gpiod_reset, 1); + clk_disable_unprepare(cs42xx8->clk); =20 return 0; --=20 2.21.0