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Mon, 17 Sep 2018 03:06:29 +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 03:06:29 +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 4.4 02/43] tsl2550: fix lux1_input error in low light Thread-Topic: [PATCH AUTOSEL 4.4 02/43] tsl2550: fix lux1_input error in low light Thread-Index: AQHUTjMySsQAgMBauU2yK8RI02gNBQ== Date: Mon, 17 Sep 2018 03:04:49 +0000 Message-ID: <20180917030445.484-2-alexander.levin@microsoft.com> References: <20180917030445.484-1-alexander.levin@microsoft.com> In-Reply-To: <20180917030445.484-1-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;CY4PR21MB0166;6:vkzoTJy+NZuecqmYV7cpm0qjfQGVNoZ9lGOxYFI0ekIxgkQ5vGbRS5hc4ZyvKVxElgCoAkiRp7Elt0II0xnK0kst8aPcZNHFxQMn+ZKCmRJsevtFp82ezqxH55uEB/3HAfXOlfwMdvVGVs1wL5Ev8pX2tk8pQKyPgSVjczlZ8yVafcIHSnSTj3VwzKcosB4ku6fT9dvJSytzzB+Y9fRJ90g8xBeNm50dCRg5pFR/Nzp8m22PSerA7JEa/ljIYxZlX/LAcnCiDMF7mXrh3Et8AfyMTIBFo4CwJ0kCoZT+s1DEKzVNqMwE4a3j4qBnHJNN2ZOyj57ngQtkHe+hrxGkNzodYaZHChdAxYSS866RkDWs6zdgLbEFikEmKkwwMhIPp46SCpmzJG83MGNJXgRBmj++X9qssqwYX4RYNK+cfiUppMzjT06FF2yyZ6UCeKzW+xNnnuLPdDcP5cKizY03Ng==;5:pDeHUhhTYFBB72wkKQYZT86eAG2qCm64o4V77dmkOEbZqb+jYk/tWCEe6yxd5nHzaN5skn0/prArKuPAClE2O7yIrgQmZu/AY/4U7HMI49Ki59OmbpvctbHsLZEqEOfznJbxB0HIxTjzMUuaKf66sDyf8YPfOtYepWu/gMmWY7s=;7:8n8kLDAEgdCNL2QoH/2C/Mz9CpnALP+NlI0WEzSpLp2SfP+5+yQ/n6zbxLtzPy8LQpFjsOmzLrKhs0R6M02FUPInaG4sGaRFFEmuYWDjrz7iW5gVMmNX/kcddOVnssHhoUVOOz/b5FdV6MHdeP9QjzEuWmTLM+aDoOZm6wEu29vOTg4dS21F9DaTlPeIXdJT34857bClHvWPGHusTqd7x5Dgrf5ofP/9tW484cMW/tDjZtHDY1i1PcdHO87PNTVO x-ms-office365-filtering-correlation-id: 4673a25a-0bb7-4876-62d8-08d61c4a9085 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:CY4PR21MB0166; 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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: vnydIjCGHaD6d7BG4G0rq8SEcLn9nO7v8SnnALrASZcoRMSimyYJ1waXk++Vv1iCs16dDEzDnt3JtGseNiPyWFPbjtUHcCmJVKBfrJJp+4z1Jmnu3+4y37KWVIsW2vEshwo2eNXxjkT+Ykcj/nPSmM8KNwBzV3XNGuxGAUF7AlpXIeL13G2t9cXh5xH2Ftj6r8i/FAmXUdye2eE6G9OLfHMdAu1xBO7/uGGjuH+eIOLWE0NEF3+qa9RurEE4i4HnsKuoMmIViHCti1Jc4Qu96QJpBnHC64D+QMoI5vXu6e42GBVyvZUkFg6D4HILbu/xXU3bKdeeSQGCzn3th1cchsn+XXc6ln5kpGk3X8KBT7Y= 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: 4673a25a-0bb7-4876-62d8-08d61c4a9085 X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Sep 2018 03:04:49.9924 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR21MB0166 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