From patchwork Tue Nov 27 03:42:46 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weiyi Lu X-Patchwork-Id: 10699701 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 F1D12109C for ; Tue, 27 Nov 2018 03:54:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DE6E02A642 for ; Tue, 27 Nov 2018 03:54:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D2C4D2A6F3; Tue, 27 Nov 2018 03:54:33 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8BA802A642 for ; Tue, 27 Nov 2018 03:54:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=YZs6RP0nM++VowwE9ZViGJateNjv6jnn5/mJmw8vj1M=; b=O7ypf8jeEOKJkW 9+NUPnZg6Ep8MlCKuMTqjFFJsUCHnyz/SpJq8X3FENJDwfIJqZ8jOF+4K0iVHMWHMpEX6y0oysKpf QfT/sEKoogr0v7MVOejt+uiIpaRa/bvacLYiScT7Rm2SMBqXK1cDy5AOV4fP7gCx4GjxZEbRFmSQI wsEM8cEsu++qaqbTUUw44fPojfIUiwlTgIteX9L8WOxoWxtMDB6mKY1hdjxPYoHP/SFnE49dK7Rpm MJpm6fUoUKElQS+AyPKOfa58XXKCpqbFubjA1UN6RyYCLNtRCIw8dD8REu9+zGYT3Tt1z3TlZlcuX RN/XlmXAgXNfcdhnV9Jw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gRUSG-0005gg-AS; Tue, 27 Nov 2018 03:54:32 +0000 Received: from [210.61.82.184] (helo=mailgw02.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gRUHg-0005vg-OW; Tue, 27 Nov 2018 03:43:40 +0000 X-UUID: 2f2f4bec1d204466a07233baf229425a-20181127 X-UUID: 2f2f4bec1d204466a07233baf229425a-20181127 Received: from mtkcas09.mediatek.inc [(172.21.101.178)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 1529391168; Tue, 27 Nov 2018 11:43:03 +0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs01n2.mediatek.inc (172.21.101.79) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 27 Nov 2018 11:43:01 +0800 Received: from mtkslt210.mediatek.inc (10.21.14.14) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Tue, 27 Nov 2018 11:43:01 +0800 From: Weiyi Lu To: Nicolas Boichat , Matthias Brugger , Stephen Boyd , Rob Herring Subject: [PATCH v2 03/11] clk: mediatek: Disable tuner_en before change PLL rate Date: Tue, 27 Nov 2018 11:42:46 +0800 Message-ID: <20181127034254.24721-5-weiyi.lu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20181127034254.24721-1-weiyi.lu@mediatek.com> References: <20181127034254.24721-1-weiyi.lu@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: 35944B68AD53D652C6A44804B444FF2682072FDFEC24CF4B5B98C214F1F6F4592000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181126_194337_099247_9504FF4C X-CRM114-Status: GOOD ( 13.00 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: James Liao , Weiyi Lu , srv_heupstream@mediatek.com, linux-kernel@vger.kernel.org, Fan Chen , linux-mediatek@lists.infradead.org, Owen Chen , linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Owen Chen PLLs with tuner_en bit, such as APLL1, need to disable tuner_en before apply new frequency settings, or the new frequency settings (pcw) will not be applied. The tuner_en bit will be disabled during changing PLL rate and be restored after new settings applied. Signed-off-by: Owen Chen --- drivers/clk/mediatek/clk-pll.c | 33 +++++++++++++++++++++++++++++++-- 1 file changed, 31 insertions(+), 2 deletions(-) diff --git a/drivers/clk/mediatek/clk-pll.c b/drivers/clk/mediatek/clk-pll.c index 1db161aced31..81400601f107 100644 --- a/drivers/clk/mediatek/clk-pll.c +++ b/drivers/clk/mediatek/clk-pll.c @@ -27,7 +27,7 @@ #define CON0_BASE_EN BIT(0) #define CON0_PWR_ON BIT(0) #define CON0_ISO_EN BIT(1) -#define CON0_PCW_CHG BIT(31) +#define CON1_PCW_CHG BIT(31) #define AUDPLL_TUNER_EN BIT(31) @@ -97,9 +97,31 @@ static void mtk_pll_set_rate_regs(struct mtk_clk_pll *pll, u32 pcw, { u32 con1, val; int pll_en; + u32 tuner_en = 0; + u32 tuner_en_mask; + void __iomem *tuner_en_addr = NULL; pll_en = readl(pll->base_addr + REG_CON0) & CON0_BASE_EN; + /* disable tuner */ + if (pll->tuner_en_addr) { + tuner_en_addr = pll->tuner_en_addr; + tuner_en_mask = BIT(pll->data->tuner_en_bit); + } else if (pll->tuner_addr) { + tuner_en_addr = pll->tuner_addr; + tuner_en_mask = AUDPLL_TUNER_EN; + } + + if (tuner_en_addr) { + val = readl(tuner_en_addr); + tuner_en = val & tuner_en_mask; + + if (tuner_en) { + val &= ~tuner_en_mask; + writel(val, tuner_en_addr); + } + } + /* set postdiv */ val = readl(pll->pd_addr); val &= ~(POSTDIV_MASK << pll->data->pd_shift); @@ -120,12 +142,19 @@ static void mtk_pll_set_rate_regs(struct mtk_clk_pll *pll, u32 pcw, con1 = readl(pll->base_addr + REG_CON1); if (pll_en) - con1 |= CON0_PCW_CHG; + con1 |= CON1_PCW_CHG; writel(con1, pll->base_addr + REG_CON1); if (pll->tuner_addr) writel(con1 + 1, pll->tuner_addr); + /* restore tuner_en */ + if (tuner_en_addr && tuner_en) { + val = readl(tuner_en_addr); + val |= tuner_en_mask; + writel(val, tuner_en_addr); + } + if (pll_en) udelay(20); }