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Miller" , =?utf-8?b?SsOpcsO0bWUgUG91aWxsZXI=?= Subject: [PATCH v3 30/32] staging: wfx: explain the purpose of wfx_send_pds() Date: Mon, 13 Sep 2021 15:02:01 +0200 Message-Id: <20210913130203.1903622-31-Jerome.Pouiller@silabs.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210913130203.1903622-1-Jerome.Pouiller@silabs.com> References: <20210913130203.1903622-1-Jerome.Pouiller@silabs.com> X-ClientProxiedBy: PR2P264CA0021.FRAP264.PROD.OUTLOOK.COM (2603:10a6:101::33) To SN6PR11MB2718.namprd11.prod.outlook.com (2603:10b6:805:63::18) MIME-Version: 1.0 Received: from pc-42.silabs.com (37.71.187.125) by PR2P264CA0021.FRAP264.PROD.OUTLOOK.COM (2603:10a6:101::33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4500.14 via Frontend Transport; Mon, 13 Sep 2021 13:03:12 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 89ce0699-15fd-4f1f-ebc0-08d976b6d877 X-MS-TrafficTypeDiagnostic: SN6PR11MB3502: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:5236; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SN6PR11MB2718.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(39850400004)(136003)(396003)(376002)(346002)(366004)(6666004)(316002)(66476007)(8676002)(186003)(7696005)(52116002)(66946007)(26005)(4326008)(66556008)(2906002)(54906003)(107886003)(6486002)(2616005)(478600001)(1076003)(36756003)(5660300002)(66574015)(956004)(8936002)(86362001)(38100700002)(38350700002)(83380400001);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?q?FoCec8lJM0fcbWOPha1Vj+K5iz6D?= =?utf-8?q?s6tnyf1lFDaD2tO8J9LmUheGkIJzb79Id2YpClROXQ2jfCk19M9tgsw5Q3/ZCHiLb?= =?utf-8?q?3d2He+fX7S1OxxX8MdvY71eB7OsMQuPa95ojUlbr0y4SM/N/IgWRXlQBXdE6F0drK?= =?utf-8?q?6XQ0FkK+ff/hStGkx9cadZ6v7kgc0usHuLq9asV1NcwguK3SMZ/dQ00TAI2hW7GjK?= =?utf-8?q?07lV3GByvKySE9sTUpBaHjf9od0OIji3aVlksll+FdxzZAHlWI8r2rdHcWFfePWB6?= =?utf-8?q?Ol5F1Z4Jj6z6C2x3fdccGstTWTYGhlRQos04a5zFOUcHlEZ8/V1MEON41YCUaMp5z?= =?utf-8?q?2AQ+SvdtWMMFjegoJRRL2yYULjjsM302NxX76lfCo7LkOVApo13ErhcKgF9KRoryH?= =?utf-8?q?hvABfwVAl+lRAcWorWu70Dd26xvNHi7eNq2H8DbnuECHdO94WbHRQ4xdYitdSFsN4?= =?utf-8?q?pzQpuZSw2OTDuAmEXdG2nBHik9S4cxJS0OLwZm5PlHZeFK7CzAz9fIhqUdOJtdwGj?= =?utf-8?q?ngVt382MaTKHGpUqlpclxqMNTvJIHaRUznxqAlS9UAX7ukUWK2RpDZVNRDw4bwT+h?= =?utf-8?q?z+AVgnhcnNRpUBK1KB+Z/J8uIFeCXr5QTuTPD0b8CyACQicqE8ViULcFddiV7ULdn?= =?utf-8?q?dFBTfqBUAPsB+2JCbPLR4V3/bt+p2mQ5GZzGyOvFtqB8WwEHCrDH+Sbd2A90m8GGF?= =?utf-8?q?hB3NM+WxNekxSQL10OubHL261/0tJKYhVSY4FAX5Men6RMy2l1oQluf+wKENF+vXQ?= =?utf-8?q?SIH+bCDHO5U0wrR+nv6b3wmpSf3ySZ+QyZRnHIpQ9TRuDaWgdxwEQa3Qv4YE7SCxu?= =?utf-8?q?OlUQnt5dqW2irNnnBpA/YKQ7vAEoVqoTZ6gvtEwG/GBd0h1Owl4MsR1eE72VUWCcm?= =?utf-8?q?IqQuGDYt8gNRQ6mFnd0aLHZMowRZ0d8eUYhnxqxnsWmU8jmTG6WUXcIa2z9U1By01?= =?utf-8?q?GgqKvumpQ98bTkVyprRzTUYDNZglGsWbgLdu2fNn7vX7CO2kHdz8xxU4PUhh82zrz?= =?utf-8?q?4Xyx1vUDw07NmbVClDtDfgEXTT98Ir/pVU2sIVXjBDNhG7CwfjN5LSzEcoP/WxYka?= =?utf-8?q?k/H9gt7C1ItBGDuqkX5RIcvOA5afSmqFMHFEFCH3c+OSp3W1Dc2ry59xZOeR9Nni9?= =?utf-8?q?U4N8S68vo5LzarhiiekKFzG2/fIt+yxWho6AfpTsgzSDpS5HAzkbn9IW70mWtsqy5?= =?utf-8?q?X/qHitL4UDcmu8iKOsNafxCGyJse8qB1JPJJJkkS9FO9Ij8mbkXRky/3ecvFzpt8K?= =?utf-8?q?6oGSByMdU8D619zh?= X-OriginatorOrg: silabs.com X-MS-Exchange-CrossTenant-Network-Message-Id: 89ce0699-15fd-4f1f-ebc0-08d976b6d877 X-MS-Exchange-CrossTenant-AuthSource: SN6PR11MB2718.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Sep 2021 13:03:13.8698 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 54dbd822-5231-4b20-944d-6f4abcd541fb X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 9F6XgrK+zMixYTf5KR+4yGvipRLv700n8KZWx2TnufZIfFiY6WB5Eud3yfOx24//CLSgTIGQob+PTBViwAtrHA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR11MB3502 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Jérôme Pouiller On first look, the goal of wfx_send_pds() is not obvious. A small explanation is welcomed. Signed-off-by: Jérôme Pouiller --- drivers/staging/wfx/main.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/staging/wfx/main.c b/drivers/staging/wfx/main.c index e5e852ddf9c3..858d778cc589 100644 --- a/drivers/staging/wfx/main.c +++ b/drivers/staging/wfx/main.c @@ -163,7 +163,20 @@ bool wfx_api_older_than(struct wfx_dev *wdev, int major, int minor) return false; } -/* NOTE: wfx_send_pds() destroy buf */ +/* The device needs data about the antenna configuration. This information in + * provided by PDS (Platform Data Set, this is the wording used in WF200 + * documentation) files. For hardware integrators, the full process to create + * PDS files is described here: + * https:github.com/SiliconLabs/wfx-firmware/blob/master/PDS/README.md + * + * So this function aims to send PDS to the device. However, the PDS file is + * often bigger than Rx buffers of the chip, so it has to be sent in multiple + * parts. + * + * In add, the PDS data cannot be split anywhere. The PDS files contains tree + * structures. Braces are used to enter/leave a level of the tree (in a JSON + * fashion). PDS files can only been split between root nodes. + */ int wfx_send_pds(struct wfx_dev *wdev, u8 *buf, size_t len) { int ret;