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Mon, 17 Sep 2018 03:07:48 +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 03:07:48 +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 3.18 02/29] tsl2550: fix lux1_input error in low light Thread-Topic: [PATCH AUTOSEL 3.18 02/29] tsl2550: fix lux1_input error in low light Thread-Index: AQHUTjNPIJofp5ky8kSwPV5ce8gVIg== Date: Mon, 17 Sep 2018 03:05:37 +0000 Message-ID: <20180917030533.592-2-alexander.levin@microsoft.com> References: <20180917030533.592-1-alexander.levin@microsoft.com> In-Reply-To: <20180917030533.592-1-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;CY4PR21MB0839;6:ybE8x9ii4L53MMaNGV/mtWVa468lZSY6tu9Fm7iIEqNvLWMm0KbRgGdVc8D4HqxHlw8wcrVAZknmesJ41+lLkcU5i9jzowHPyzEaGhAvnRROhgWiHkVhRyiOwkI8CD9/x7jK+VRayOqCP3nDIoj0WFy4o54d4Q3w5bewl4BUCGQigZtzcfsfvTRI2dwWSlQPuOcOMvU61sGmE6w1O8IQ9RaZii+f3QBlBPHA4z7b//ILYL9TxXXkFTLaDD9GAL84b4zoD4OGnhn0GmD02VslUcwyKdZP6C8yizg7hw2P033upypTSTpaTubSFKrLd/k7LDARCQsa1UKQ7U1Syj6IFaKzkCBYHeCK+aEZAN2H41oizmuo9zlWzGUKQwBdJRueJmKj27l21VGwgr1lN+MrqqTOwdPlwBH8eTDGdsERjcH+6tGgYQDxYXaQRI3742t9UXpUjBX9SZ/WCNoxi/Ksdw==;5:/vhiPYK96LWVZkhUcRlRn5jmPeZy6H3ce1vv/KSonKHsX78427xEzk9Az86Waw8DEWqvSad/RTrcYMISPCwQEHi4ShwSrCDP5F+JkYdTNb9UV0KD4HaN5FJEiLEVyfpgeAcl8mQopFwC4wbR+wjoxxRU/PcPFQEFYoXxMVYaESE=;7:oQ6FQXacqAwme6B+F1Uao3VXim3fzK4xnJnjM8o4thsZ1AA7tTcfmfnb5Uz1s08/1CRskow6kfXeOGmZu2Gd4zvxyCXa4+DFCrqcK78wJ6iSRT4wQKsiZTpXskuUTf1MWZ5BSOeoARpV4faWhMtfyJ0VlRJOzMa9PqsBGy7Xz8iOxuNosAXjs+1RFWv93sk6d0vWg27NwIvKjFVLOa1wgfN5xFG7x6SP0DCp0oPPv6pI+sFFFBpzmB4FOzWlCmb2 x-ms-office365-filtering-correlation-id: e51b4f54-e76a-416a-89b2-08d61c4abf62 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:CY4PR21MB0839; 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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: 0gHhdTpWaAbMVadO6X0bdpBQrwU8YgF90J4RlVFwAdh1lmDjfliFB1dkTNCbKTaGzt8OO+PNnmNlgdV077c8W+OC5LRrQ3YtMwn+yihn6VOy3eKIJrALdsR3VBz9BdaJB3ZWAmwbHG6QLKdCEdaKQ3OOnE6WkhQKgMnt/y0VBHmAATjer+f+9cJjxjT3WmydseetR9WJeqpaP5yezZOHbc4ByX4qx6FSeOMAO6olfQ84Omvq5C9Naj7rMXtuqDhq/NgUtc7702wtHSYNM8hrpCc2OqY/aBkyJPYvCEJ2MHOJ1IRizMr1QtirjcPTKCJYPbLlqXxMsWxzlzuhtYUTPh3yOOCZFXHVLRJiHC3E2vM= 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: e51b4f54-e76a-416a-89b2-08d61c4abf62 X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Sep 2018 03:05:37.7460 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR21MB0839 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 b00335652e52..59b9e46c0a7b 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