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Mon, 17 Sep 2018 03:05:05 +0000 Received: from CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::54e2:88e0:b622:b36]) by CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::54e2:88e0:b622:b36%5]) with mapi id 15.20.1185.003; Mon, 17 Sep 2018 03:05:05 +0000 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Matt Ranostay , Arnd Bergmann , Greg Kroah-Hartman , Sasha Levin Subject: [PATCH AUTOSEL 4.9 02/57] tsl2550: fix lux1_input error in low light Thread-Topic: [PATCH AUTOSEL 4.9 02/57] tsl2550: fix lux1_input error in low light Thread-Index: AQHUTjML59m7o6AjXEaI/lDvP9WspA== Date: Mon, 17 Sep 2018 03:03:45 +0000 Message-ID: <20180917030340.378-2-alexander.levin@microsoft.com> References: <20180917030340.378-1-alexander.levin@microsoft.com> In-Reply-To: <20180917030340.378-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;CY4PR21MB0120;6:HEqCKDsBQt/KUmR2Rf45zLDkrv8VJ1Q6iPPAB7J6+FqaCeZ1TGB9j2G4Q2Wf/gwspzrPj/N8cH3i+vMjSQT14VJDZVKszrQgmtXefsgoMa4OGCBo2aHF3z5MuYXLeSc8MtatzLPGwifKMzJ3B3vIUgJB/nBZy1UHmO3ih7yitdhAnHJpKFQxTctiw3eiLE9wrM0YzOeeXsHiKwpdY2cQot1Sf0EnlkdTraK2xJZuXpHTO3CYTmyanAfnqUXD1Nsgi+nvfFk88NYpxjeoYqBjmy2tbmb78mmoKUVvMOV0txgwdXB4i/9iLvd/n6OJNjAjr0WgjBzbq0Ou8h+wGSOMjFIlL06/9Qv93NxYJSb1zHKueE6UOOUpH+XXlx9+WoU0cq20m2F2b5E3I3Okt4DGv2PTjZiZtkW6HAX+tmqermTIenXtTJDw+KktVQFJYtgxYjk6ifN1PaV2q0SahK2/7w==;5:X9A5jcU5w7X8n5FYmXxMwvMjT2G3BJkdc9VpnD6Su4hRDQw2OG6e48deVddpXFI6WfQ34vo8es23Fk+6RKXUpJa3DO2I9b7i2fjydEQd5lrE9zoU9KFpUubrLy6lKNrAoMLm8UaApgSBZENWVxCMmzcAMi45yVTbcuRd/yJfgwE=;7:zJm+cMbCvbdoyj4XJY2MXtxDni30hCzsD/Eik3rNmDRx3veJGFh/C5DV1xwOdHVcwo9YIuU8gCClezqVXrivQwZbjMWhjOhGp5BZ3LoUZj5fpMQkomUvyBaajEODsdMwjOROuK9GsnJ2y5ykir9vMfkitxRsZlmBvcTeFdD3RpFyxmerxaQY6qjiUXmwHnb9FU87klemVBX0zud+EsUAsZdk/atbtAhurz7vlY7nBTVGuFuQMbBbqUV6RWxBID3j x-ms-office365-filtering-correlation-id: 9dde00b2-61fa-4de3-9d59-08d61c4a5e88 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(7020095)(4652040)(8989137)(4534165)(4627221)(201703031133081)(201702281549075)(8990107)(5600074)(711020)(4618075)(2017052603328)(7193020);SRVR:CY4PR21MB0120; 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received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-message-info: eBpThJaLKzlQIqYRN/3S86JhxuWkG2Ep2n3EVbkJi3hQd1+7LTlpSGq/NZGtUjjcBFzRLn35xLbZ+s02fboEV39Oade4TwZAx7zhXIoPcV1HGrjaTdTK7kz47ioEkzD9patjl0w2JxGgVcY7nFxdzGPvVq+UO8Zu7LHVYFQrZ5OsugQ7+uTtdXx21BruOOVvzNN24URjXVgCKHD/hGRjzYvjDjqN+i4LMKWAnr4tGVqrzGiBRIvSzBxRx5nmNlxZ+MeurOyWEXxATsJ/hZoGU1b2rahGzyqVBcRep2PVF+2rUb4KUeH0RGiMVi/ZBn/1JXjYbGZbg449zRnzVYcYKvQ6mE2iGnb84SZot6cgfU8= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 9dde00b2-61fa-4de3-9d59-08d61c4a5e88 X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Sep 2018 03:03:45.1180 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR21MB0120 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Matt Ranostay [ Upstream commit ce054546cc2c26891cefa2f284d90d93b52205de ] ADC channel 0 photodiode detects both infrared + visible light, but ADC channel 1 just detects infrared. However, the latter is a bit more sensitive in that range so complete darkness or low light causes a error condition in which the chan0 - chan1 is negative that results in a -EAGAIN. This patch changes the resulting lux1_input sysfs attribute message from "Resource temporarily unavailable" to a user-grokable lux value of 0. Cc: Arnd Bergmann Cc: Greg Kroah-Hartman Signed-off-by: Matt Ranostay Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/misc/tsl2550.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/tsl2550.c b/drivers/misc/tsl2550.c index 87a13374fdc0..eb5761067310 100644 --- a/drivers/misc/tsl2550.c +++ b/drivers/misc/tsl2550.c @@ -177,7 +177,7 @@ static int tsl2550_calculate_lux(u8 ch0, u8 ch1) } else lux =3D 0; else - return -EAGAIN; + return 0; =20 /* LUX range check */ return lux > TSL2550_MAX_LUX ? TSL2550_MAX_LUX : lux; --=20 2.17.1