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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; 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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+K5i?= =?utf-8?q?z6Ds6tnyf1lFDaD2tO8J9LmUheGkIJzb79Id2YpClROXQ2jfCk19M9tg?= =?utf-8?q?sw5Q3/ZCHiLb3d2He+fX7S1OxxX8MdvY71eB7OsMQuPa95ojUlbr0y4S?= =?utf-8?q?M/N/IgWRXlQBXdE6F0drK6XQ0FkK+ff/hStGkx9cadZ6v7kgc0usHuLq?= =?utf-8?q?9asV1NcwguK3SMZ/dQ00TAI2hW7GjK07lV3GByvKySE9sTUpBaHjf9od?= =?utf-8?q?0OIji3aVlksll+FdxzZAHlWI8r2rdHcWFfePWB6Ol5F1Z4Jj6z6C2x3f?= =?utf-8?q?dccGstTWTYGhlRQos04a5zFOUcHlEZ8/V1MEON41YCUaMp5z2AQ+Svdt?= =?utf-8?q?WMMFjegoJRRL2yYULjjsM302NxX76lfCo7LkOVApo13ErhcKgF9KRory?= =?utf-8?q?HhvABfwVAl+lRAcWorWu70Dd26xvNHi7eNq2H8DbnuECHdO94WbHRQ4x?= =?utf-8?q?dYitdSFsN4pzQpuZSw2OTDuAmEXdG2nBHik9S4cxJS0OLwZm5PlHZeFK?= =?utf-8?q?7CzAz9fIhqUdOJtdwGjngVt382MaTKHGpUqlpclxqMNTvJIHaRUznxqA?= =?utf-8?q?lS9UAX7ukUWK2RpDZVNRDw4bwT+hz+AVgnhcnNRpUBK1KB+Z/J8uIFeC?= =?utf-8?q?Xr5QTuTPD0b8CyACQicqE8ViULcFddiV7ULdndFBTfqBUAPsB+2JCbPL?= =?utf-8?q?R4V3/bt+p2mQ5GZzGyOvFtqB8WwEHCrDH+Sbd2A90m8GGFhB3NM+WxNe?= =?utf-8?q?kxSQL10OubHL261/0tJKYhVSY4FAX5Men6RMy2l1oQluf+wKENF+vXQS?= =?utf-8?q?IH+bCDHO5U0wrR+nv6b3wmpSf3ySZ+QyZRnHIpQ9TRuDaWgdxwEQa3Qv?= =?utf-8?q?4YE7SCxuOlUQnt5dqW2irNnnBpA/YKQ7vAEoVqoTZ6gvtEwG/GBd0h1O?= =?utf-8?q?wl4MsR1eE72VUWCcmIqQuGDYt8gNRQ6mFnd0aLHZMowRZ0d8eUYhnxqx?= =?utf-8?q?nsWmU8jmTG6WUXcIa2z9U1By01GgqKvumpQ98bTkVyprRzTUYDNZglGs?= =?utf-8?q?WbgLdu2fNn7vX7CO2kHdz8xxU4PUhh82zrz4Xyx1vUDw07NmbVClDtDf?= =?utf-8?q?gEXTT98Ir/pVU2sIVXjBDNhG7CwfjN5LSzEcoP/WxYkak/H9gt7C1ItB?= =?utf-8?q?GDuqkX5RIcvOA5afSmqFMHFEFCH3c+OSp3W1Dc2ry59xZOeR9Nni9U4N?= =?utf-8?q?8S68vo5LzarhiiekKFzG2/fIt+yxWho6AfpTsgzSDpS5HAzkbn9IW70m?= =?utf-8?q?Wtsqy5X/qHitL4UDcmu8iKOsNafxCGyJse8qB1JPJJJkkS9FO9Ij8mbk?= =?utf-8?q?XRky/3ecvFzpt8K6oGSByMdU8D619zh?= 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: netdev@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;