From patchwork Sat Mar 2 05:06:33 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Govind Singh X-Patchwork-Id: 10836445 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 090FA1669 for ; Sat, 2 Mar 2019 05:06:51 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EBB842D27B for ; Sat, 2 Mar 2019 05:06:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DF2882D201; Sat, 2 Mar 2019 05:06:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 891AF2D201 for ; Sat, 2 Mar 2019 05:06:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726049AbfCBFGn (ORCPT ); Sat, 2 Mar 2019 00:06:43 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:36276 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725300AbfCBFGn (ORCPT ); Sat, 2 Mar 2019 00:06:43 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id D2A7560CF0; Sat, 2 Mar 2019 05:06:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1551503202; bh=a+bHHmTnOO2+xMd0ZeIKrBUaiosfZ497iwrKfgXNow4=; h=From:To:Cc:Subject:Date:From; b=OI6Bi52D6HpTHgQyEI0DltAAYzsO3di4o+9nWRThvuMiJ9i1tRyA8gA5mV/tUlS4s 629uHxHjIGi5t320kAeg4UGi/TfyUTtbcjHuLYcw+/GUjwNUHMubzrWbLwkjDsqtnL XPrcAcdpuuvL3qiP1MtL/K0QtyGd3/HZuQ0soEMM= Received: from govinds-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: govinds@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id CEEAF60744; Sat, 2 Mar 2019 05:06:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1551503202; bh=a+bHHmTnOO2+xMd0ZeIKrBUaiosfZ497iwrKfgXNow4=; h=From:To:Cc:Subject:Date:From; b=OI6Bi52D6HpTHgQyEI0DltAAYzsO3di4o+9nWRThvuMiJ9i1tRyA8gA5mV/tUlS4s 629uHxHjIGi5t320kAeg4UGi/TfyUTtbcjHuLYcw+/GUjwNUHMubzrWbLwkjDsqtnL XPrcAcdpuuvL3qiP1MtL/K0QtyGd3/HZuQ0soEMM= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org CEEAF60744 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=govinds@codeaurora.org From: Govind Singh To: ath10k@lists.infradead.org Cc: linux-wireless@vger.kernel.org, devicetree@vger.kernel.org, Govind Singh Subject: [PATCH 0/2] Add xo calibration support for wifi rf clock Date: Sat, 2 Mar 2019 10:36:33 +0530 Message-Id: <20190302050635.17694-1-govinds@codeaurora.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP PMIC XO is the clock source for wifi rf clock in integrated wifi chipset ex: WCN3990. Due to board layout errors XO frequency drifts can cause wifi rf clock inaccuracy. XO calibration test tree in Factory Test Mode is used to find the best frequency offset(for example +/-2KHz )by programming XO trim register. This ensure system clock stays within required 20 ppm WLAN rf clock. Retrieve the xo trim offset via system firmware (e.g., device tree), especially in the case where the device doesn't have a useful EEPROM on which to store the calibrated XO offset (e.g., for integrated Wifi). Calibrated XO offset is sent to fw, which compensate the clock drift by programing the XO trim register. Testing: Tested on QCS404 platform(WCN3990 HW) Tested FW: WLAN.HL.3.1-00959-QCAHLSWMTPLZ-1 Govind Singh (2): dt: bindings: add dt entry for XO calibration support ath10k: Add xo calibration support for wifi rf clock .../devicetree/bindings/net/wireless/qcom,ath10k.txt | 1 + drivers/net/wireless/ath/ath10k/qmi.c | 12 ++++++++++++ drivers/net/wireless/ath/ath10k/snoc.c | 10 ++++++++++ drivers/net/wireless/ath/ath10k/snoc.h | 2 ++ 4 files changed, 25 insertions(+)