From patchwork Fri Feb 1 08:30:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weiyi Lu X-Patchwork-Id: 10792097 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 9F8DA746 for ; Fri, 1 Feb 2019 08:41:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8E5CE316EC for ; Fri, 1 Feb 2019 08:41:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 80570318BE; Fri, 1 Feb 2019 08:41:06 +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 E6079316EC for ; Fri, 1 Feb 2019 08:41:05 +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=npxZHUc044CU3qOwPx9tX7wqqZ1+RIqatsw5XJv2Vvw=; b=sfiwTskAvjQgH4 iTKBMD3FlyQaeBgRFMbkdtqCpNFdVZYRfspUeIM2bD969UNzpvUm93D/2SuT4K0+xE4rRhYVsevjM qDh1HO7c02PsvAqFAwqmxgwM7shMZG3+3jRyNtQjGyWlWa874PaTANXBsytSMoEDNVpu0JhB9/W+E OzDyUdcrV1IvQ6Q7GE79a2QIBe8X3eUL87bD93ukU3dpxgEib3tApHMSV3GdHACIG3iYe3T2HDYN0 F1Y+TBXaoE1oIaAdEHQXnoABh36qMhT2M3phjOOH2XCnPhzS36BGPe9CwQc+oD2B9G+XA5T8+sIAi y8353y/Pa2TcLmnhcJhw==; 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 1gpUNg-0005uL-0J; Fri, 01 Feb 2019 08:41:00 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gpUDb-0007GQ-Dx; Fri, 01 Feb 2019 08:30:44 +0000 X-UUID: 76dfbb11821047de9bd12ea426641ece-20190201 X-UUID: 76dfbb11821047de9bd12ea426641ece-20190201 Received: from mtkcas67.mediatek.inc [(172.29.193.45)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 134006222; Fri, 01 Feb 2019 00:30:28 -0800 Received: from mtkmbs03n1.mediatek.inc (172.21.101.181) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Fri, 1 Feb 2019 00:30:27 -0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs03n1.mediatek.inc (172.21.101.181) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Fri, 1 Feb 2019 16:30:25 +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; Fri, 1 Feb 2019 16:30:25 +0800 From: Weiyi Lu To: Nicolas Boichat , Matthias Brugger , Stephen Boyd , Rob Herring Subject: [PATCH v4 01/12] clk: mediatek: Disable tuner_en before change PLL rate Date: Fri, 1 Feb 2019 16:30:05 +0800 Message-ID: <20190201083016.25856-3-weiyi.lu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20190201083016.25856-1-weiyi.lu@mediatek.com> References: <20190201083016.25856-1-weiyi.lu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190201_003035_855487_7066B648 X-CRM114-Status: GOOD ( 11.86 ) 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, stable@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. Another minor change is to correct the macro name of pcw change bit to CON1_PCW_CHG because PCW_CHG(BIT31) is on CON1. Fixes: e2f744a82d725 (clk: mediatek: Add MT2712 clock support) Cc: 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 f54e4015b0b1..f0ff5f535c7e 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) @@ -93,9 +93,31 @@ 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); @@ -116,12 +138,19 @@ 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); }