From patchwork Wed Jan 27 09:54:28 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Raja Mani X-Patchwork-Id: 8131901 Return-Path: X-Original-To: patchwork-ath10k@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id C6F12BEEE5 for ; Wed, 27 Jan 2016 09:58:36 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CC1AC202E6 for ; Wed, 27 Jan 2016 09:58:35 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C61E820295 for ; Wed, 27 Jan 2016 09:58:34 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1aOMrr-0004TU-Vq; Wed, 27 Jan 2016 09:58:27 +0000 Received: from wolverine01.qualcomm.com ([199.106.114.254]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1aOMrn-0004G6-IG for ath10k@lists.infradead.org; Wed, 27 Jan 2016 09:58:25 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=qti.qualcomm.com; i=@qti.qualcomm.com; q=dns/txt; s=qcdkim; t=1453888703; x=1485424703; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=1CWF79cXkAzBneEui3BBFCx66V6kCXj6uMaK6gJE7j0=; b=SfQ0XU/XnOFLB5G0kvGWhxuTWngVLG5Be4xx+M1BftiNtpb0zMpE60Zm PMFNbWZa8o8uCAN0WcbGyQ6h10nBO7xvHLT04WZg6PKvlOEw7Xtlgj6Fp Vy5Zwg+B0qbwygJJk13V6PEiMb1lh794L8wHjJR+aKHETgwcgrqxdRIht 4=; X-IronPort-AV: E=Sophos;i="5.22,354,1449561600"; d="scan'208";a="164474406" Received: from ironmsg02-l-new.qualcomm.com (HELO ironmsg02-L.qualcomm.com) ([10.53.140.109]) by wolverine01.qualcomm.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 27 Jan 2016 01:58:04 -0800 X-IronPort-AV: E=McAfee;i="5700,7163,8056"; a="627253581" Received: from nasanexm02e.na.qualcomm.com ([10.85.0.86]) by ironmsg02-L.qualcomm.com with ESMTP/TLS/RC4-SHA; 27 Jan 2016 01:58:04 -0800 Received: from aphydexm01a.ap.qualcomm.com (10.252.127.10) by nasanexm02e.na.qualcomm.com (10.85.0.86) with Microsoft SMTP Server (TLS) id 15.0.1130.7; Wed, 27 Jan 2016 01:58:02 -0800 Received: from 10.80.81.91 (10.80.80.8) by aphydexm01a.ap.qualcomm.com (10.252.127.10) with Microsoft SMTP Server (TLS) id 15.0.1130.7; Wed, 27 Jan 2016 15:27:52 +0530 Received: by 10.80.81.91 (sSMTP sendmail emulation); Wed, 27 Jan 2016 15:27:41 +0530 From: Raja Mani To: Subject: [PATCH 07/12] ath10k: add clock ctrl related functions in ahb Date: Wed, 27 Jan 2016 15:24:28 +0530 Message-ID: <1453888473-2879-8-git-send-email-rmani@qti.qualcomm.com> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1453888473-2879-1-git-send-email-rmani@qti.qualcomm.com> References: <1453888473-2879-1-git-send-email-rmani@qti.qualcomm.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: NASANEXM01F.na.qualcomm.com (10.85.0.32) To aphydexm01a.ap.qualcomm.com (10.252.127.10) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160127_015824_078194_6C7AA2C3 X-CRM114-Status: GOOD ( 11.30 ) X-Spam-Score: -5.4 (-----) X-BeenThere: ath10k@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-wireless@vger.kernel.org, Raja Mani Sender: "ath10k" Errors-To: ath10k-bounces+patchwork-ath10k=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP pre qca4019 chipsets has/uses internal clock generator for the operation. But, qca4019 uses external clocks supplied from outside of target (ie, outside of wifi core). Three different clocks (cmd clock, ref clock, rtc clock) comes into picture in qca4019. All those clocks needs to configured with help of global clock controller (gcc) to make qca4019 functioning. Add functions for clock init/deinit, clock enable/disable in ahb. This is just a preparation, functions added in this patch will be used in later patches. Signed-off-by: Raja Mani --- drivers/net/wireless/ath/ath10k/ahb.c | 123 ++++++++++++++++++++++++++++++++++ drivers/net/wireless/ath/ath10k/ahb.h | 4 ++ 2 files changed, 127 insertions(+) diff --git a/drivers/net/wireless/ath/ath10k/ahb.c b/drivers/net/wireless/ath/ath10k/ahb.c index eab4b47..11185c0 100644 --- a/drivers/net/wireless/ath/ath10k/ahb.c +++ b/drivers/net/wireless/ath/ath10k/ahb.c @@ -15,6 +15,7 @@ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include +#include #include "core.h" #include "debug.h" #include "pci.h" @@ -84,6 +85,128 @@ static int ath10k_ahb_get_num_banks(struct ath10k *ar) return 1; } +static int ath10k_ahb_clock_init(struct ath10k *ar) +{ + struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); + struct device *dev; + int ret; + + dev = &ar_ahb->pdev->dev; + + ar_ahb->cmd_clk = clk_get(dev, "wifi_wcss_cmd"); + if (IS_ERR_OR_NULL(ar_ahb->cmd_clk)) { + ath10k_err(ar, "failed to get cmd clk: %ld\n", + PTR_ERR(ar_ahb->cmd_clk)); + ret = ar_ahb->cmd_clk ? PTR_ERR(ar_ahb->cmd_clk) : -ENODEV; + goto out; + } + + ar_ahb->ref_clk = clk_get(dev, "wifi_wcss_ref"); + if (IS_ERR_OR_NULL(ar_ahb->ref_clk)) { + ath10k_err(ar, "failed to get ref clk: %ld\n", + PTR_ERR(ar_ahb->ref_clk)); + ret = ar_ahb->ref_clk ? PTR_ERR(ar_ahb->ref_clk) : -ENODEV; + goto err_cmd_clk_put; + } + + ar_ahb->rtc_clk = clk_get(dev, "wifi_wcss_rtc"); + if (IS_ERR_OR_NULL(ar_ahb->rtc_clk)) { + ath10k_err(ar, "failed to get rtc clk: %ld\n", + PTR_ERR(ar_ahb->rtc_clk)); + ret = ar_ahb->rtc_clk ? PTR_ERR(ar_ahb->rtc_clk) : -ENODEV; + goto err_ref_clk_put; + } + + return 0; + +err_ref_clk_put: + clk_put(ar_ahb->ref_clk); + +err_cmd_clk_put: + clk_put(ar_ahb->cmd_clk); + +out: + return ret; +} + +static void ath10k_ahb_clock_deinit(struct ath10k *ar) +{ + struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); + + if (!IS_ERR_OR_NULL(ar_ahb->cmd_clk)) + clk_put(ar_ahb->cmd_clk); + + if (!IS_ERR_OR_NULL(ar_ahb->ref_clk)) + clk_put(ar_ahb->ref_clk); + + if (!IS_ERR_OR_NULL(ar_ahb->rtc_clk)) + clk_put(ar_ahb->rtc_clk); + + ar_ahb->cmd_clk = NULL; + ar_ahb->ref_clk = NULL; + ar_ahb->rtc_clk = NULL; +} + +static int ath10k_ahb_clock_enable(struct ath10k *ar) +{ + struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); + struct device *dev; + int ret; + + dev = &ar_ahb->pdev->dev; + + if (IS_ERR_OR_NULL(ar_ahb->cmd_clk) || + IS_ERR_OR_NULL(ar_ahb->ref_clk) || + IS_ERR_OR_NULL(ar_ahb->rtc_clk)) { + ath10k_err(ar, "clock(s) is/are not initialized\n"); + ret = -EIO; + goto out; + } + + ret = clk_prepare_enable(ar_ahb->cmd_clk); + if (ret) { + ath10k_err(ar, "failed to enable cmd clk: %d\n", ret); + goto out; + } + + ret = clk_prepare_enable(ar_ahb->ref_clk); + if (ret) { + ath10k_err(ar, "failed to enable ref clk: %d\n", ret); + goto err_cmd_clk_disable; + } + + ret = clk_prepare_enable(ar_ahb->rtc_clk); + if (ret) { + ath10k_err(ar, "failed to enable rtc clk: %d\n", ret); + goto err_ref_clk_disable; + } + + return 0; + +err_ref_clk_disable: + clk_disable_unprepare(ar_ahb->ref_clk); + +err_cmd_clk_disable: + clk_disable_unprepare(ar_ahb->cmd_clk); + +out: + return ret; +} + +static void ath10k_ahb_clock_disable(struct ath10k *ar) +{ + struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar); + + if (!IS_ERR_OR_NULL(ar_ahb->cmd_clk)) + clk_disable_unprepare(ar_ahb->cmd_clk); + + if (!IS_ERR_OR_NULL(ar_ahb->ref_clk)) + clk_disable_unprepare(ar_ahb->ref_clk); + + if (!IS_ERR_OR_NULL(ar_ahb->rtc_clk)) + clk_disable_unprepare(ar_ahb->rtc_clk); +} + static int ath10k_ahb_probe(struct platform_device *pdev) { return 0; diff --git a/drivers/net/wireless/ath/ath10k/ahb.h b/drivers/net/wireless/ath/ath10k/ahb.h index 77d15af..753b433 100644 --- a/drivers/net/wireless/ath/ath10k/ahb.h +++ b/drivers/net/wireless/ath/ath10k/ahb.h @@ -25,6 +25,10 @@ struct ath10k_ahb { void __iomem *mem; void __iomem *gcc_mem; void __iomem *tcsr_mem; + + struct clk *cmd_clk; + struct clk *ref_clk; + struct clk *rtc_clk; }; #ifdef CONFIG_ATH10K_AHB