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Fri, 13 Dec 2019 07:52:54 +0000 Received: from SG2PR04MB3029.apcprd04.prod.outlook.com ([fe80::34a4:b6ee:359e:a447]) by SG2PR04MB3029.apcprd04.prod.outlook.com ([fe80::34a4:b6ee:359e:a447%4]) with mapi id 15.20.2538.017; Fri, 13 Dec 2019 07:52:54 +0000 From: Kumar Thangavel To: James Feist , "openbmc@lists.ozlabs.org" Subject: Re: GPIO-Direction issue Thread-Topic: GPIO-Direction issue Thread-Index: AQHVsB1YioCulj/BSEKzev0Y80Jx06e2vPEAgAD3HDI= Date: Fri, 13 Dec 2019 07:52:54 +0000 Message-ID: References: , In-Reply-To: Accept-Language: en-GB, en-US Content-Language: en-GB X-MS-Has-Attach: X-MS-TNEF-Correlator: Authentication-Results-Original: spf=none (sender IP is ) smtp.mailfrom=thangavel.k@hcl.com; x-originating-ip: [106.206.34.105] x-ms-publictraffictype: Email X-MS-Office365-Filtering-Correlation-Id: fefad9e3-e0e1-4ef9-80d1-08d77fa178f8 X-MS-TrafficTypeDiagnostic: SG2PR04MB2332:|HK0PR04MB2945: X-Microsoft-Antispam-PRVS: x-ms-oob-tlc-oobclassifiers: OLM:6430;OLM:3968; x-forefront-prvs: 0250B840C1 X-Forefront-Antispam-Report-Untrusted: SFV:NSPM; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable Sure. Thanks for your suggestions. Thanks, Kumar. ________________________________ From: James Feist Sent: 12 December 2019 22:37 To: Kumar Thangavel ; openbmc@lists.ozlabs.org Subject: Re: GPIO-Direction issue On 12/11/19 4:50 AM, Kumar Thangavel wrote: > Hi All, > > I am using entity manager configuration file(.json) to enable > the GPIO pin. > > The gpio node was created in /sys/class/gpio/* using > configuration files. > > I set Direction as "Out" in json. But it was not getting > changed in /sys/class/gpio/gpio*/Direction. The Direction was still > remains as "in". Gpio usage via sysfs is deprecated. We're currently working to remove all usages of it ourselves that we have in entity-manager. I would suggest using libgpiod to use gpio via character device instead. https://apc01.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fgit.ker= nel.org%2Fpub%2Fscm%2Flibs%2Flibgpiod%2Flibgpiod.git%2Ftree%2Fbindings%2Fcx= x&data=3D02%7C01%7Cthangavel.k%40hcl.com%7Cbf18dac88ecc4a35bc2508d77f25= bb67%7C189de737c93a4f5a8b686f4ca9941912%7C0%7C0%7C637117672349243185&sd= ata=3DJeruefedzy4Bnb%2FIVjn4j1zT4YUhh9KwEH1tB6oNKxQ%3D&reserved=3D0 ::DISCLAIMER:: ________________________________ The contents of this e-mail and any attachment(s) are confidential and inte= nded for the named recipient(s) only. E-mail transmission is not guaranteed= to be secure or error-free as information could be intercepted, corrupted,= lost, destroyed, arrive late or incomplete, or may contain viruses in tran= smission. The e mail and its contents (with or without referred errors) sha= ll therefore not attach any liability on the originator or HCL or its affil= iates. Views or opinions, if any, presented in this email are solely those = of the author and may not necessarily reflect the views or opinions of HCL = or its affiliates. Any form of reproduction, dissemination, copying, disclo= sure, modification, distribution and / or publication of this message witho= ut the prior written consent of authorized representative of HCL is strictl= y prohibited. If you have received this email in error please delete it and= notify the sender immediately. Before opening any email and/or attachments= , please check them for viruses and other defects. ________________________________ --_000_SG2PR04MB302998EE380A600959EB04DEFD540SG2PR04MB3029apcp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Sure. Thanks for your suggestions.


Thanks,
Kumar.
From: James Feist <james= .feist@linux.intel.com>
Sent: 12 December 2019 22:37
To: Kumar Thangavel <thangavel.k@hcl.com>; openbmc@lists.ozlab= s.org <openbmc@lists.ozlabs.org>
Subject: Re: GPIO-Direction issue
 
On 12/11/19 4:50 AM, Kumar Thangavel wrote:
> Hi All,
>
>          I am using entity man= ager configuration file(.json) to enable
> the GPIO pin.
>
>          The gpio node was cre= ated in /sys/class/gpio/* using
> configuration files.
>
>          I set Direction as &q= uot;Out" in json. But it was not getting
> changed in /sys/class/gpio/gpio*/Direction. The Direction was still > remains as "in".

Gpio usage via sysfs is deprecated. We're currently working to remove
all usages of it ourselves that we have in entity-manager. I would
suggest using libgpiod to use gpio via character device instead.

https://apc01.safelinks.protection.outlook.com/?url=3D= https%3A%2F%2Fgit.kernel.org%2Fpub%2Fscm%2Flibs%2Flibgpiod%2Flibgpiod.git%2= Ftree%2Fbindings%2Fcxx&amp;data=3D02%7C01%7Cthangavel.k%40hcl.com%7Cbf1= 8dac88ecc4a35bc2508d77f25bb67%7C189de737c93a4f5a8b686f4ca9941912%7C0%7C0%7C= 637117672349243185&amp;sdata=3DJeruefedzy4Bnb%2FIVjn4j1zT4YUhh9KwEH1tB6= oNKxQ%3D&amp;reserved=3D0

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