From patchwork Mon Apr 15 10:10:40 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonas Gorski X-Patchwork-Id: 10900463 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 3F51B1669 for ; Mon, 15 Apr 2019 10:11:49 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 21AAA288BA for ; Mon, 15 Apr 2019 10:11:49 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1F2DE284F5; Mon, 15 Apr 2019 10:11:49 +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_ADSP_CUSTOM_MED, DKIM_SIGNED,DKIM_VALID,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED 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 C2B712884E for ; Mon, 15 Apr 2019 10:11:48 +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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=XsV7SmgRNwztxzG09rTVlKlCrx7wm0LJ8HxcHemCCfU=; b=i/lbKWMPDGV1fHe6W/tUY6KoAY zYF8a0hEMciNwHb6E/Mq3aHdV1VgQx2REIphjz445WhuESgSXoGorDYjSiRTTImPPdIKap5YEV48y HLv5DHpRQOPjZOzX4LbcbxTQaqcnTj/AkmzNeyUX8cMy4gLQ+9iQKE1JTn3hlwJ0s8syIDNVcjvA2 TxS+uZNm4VBWzBosIHH15KlLwtQQTXoYHhgNT1X1e1GkRfX3U/V6ohniiFxhmxdI0kuCJlMt3zaW+ 3vYXGWY+lTmSuStGX4vQCNWWtsShS2y9o5tnV9LcQoyII3oTC+lh25PF94v7Aj6buN0vQ0jUnIXHt pSbn/sMg==; 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 1hFyaZ-0004f8-TV; Mon, 15 Apr 2019 10:11:47 +0000 Received: from mail-wr1-x441.google.com ([2a00:1450:4864:20::441]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hFyZj-0003i1-Bi; Mon, 15 Apr 2019 10:10:57 +0000 Received: by mail-wr1-x441.google.com with SMTP id h4so21149903wre.7; Mon, 15 Apr 2019 03:10:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=o+W2Q634iC3zR2xiEnI5jQwiq7sivbZ81nwPB9eB+tU=; b=gztGjS1hRk4mVTO/iq0Zf3l+AJuYNqz3qjgBMCKMLcEtjTKD1dvxU280eEopc1zqjp 3mVduNg2l6/zUug56BWIGoXgTufkNUR1/GVyyxNeN/v0wFu5hSzGt9z0pBZrFdjHT2JJ FEJBOb31onNhjnwqgxnUDN+Ht3ExstBL4lIlKhhOsIzbsvbedk2DPwC7LDCjnx0hnf3J 6fGKL1Vy9WALTgeQXrtDvb3HvSuH453GwBjxEeLvHiwKJ1KWfowHFSpApbN/60681UAx S7F5tovZ3qcr/9qOTlt2gVrRqjl1AErzJq1UEmFkoH2+C4RrlnByh7gdGymRaUO1IKuX 6YLw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=o+W2Q634iC3zR2xiEnI5jQwiq7sivbZ81nwPB9eB+tU=; b=fjntMKksp14zVbCItyfek0deBzOp8zkrOCxYJS2ONDXQ7BPpi60fdH2AS3rvwtBysc I3MHmEHUIglpQFovJJk7QvL+kJ4gYOPwE6tjZF3+nE3iSz2CBRU1AF+IKuXBGuwoUfvN 9KHBLB+udMpm8nZzwAyqEfGEFPOYk+w44UaHGPKJkB/hTkhCA0LpwgQRxsKoGtmJoxSv hG1YJNk/ImHhyGARXKSpALw8tSzy8mmW1EQFDg/wOQVlXApHAIw0fUTKAOdZnJ0vrw3c HfM1AvqM+8SMnCGswoqfzRUz/tv94WKhI71A+2wBqsNxVeN+JjJo8Tqmrn2QF7i4Irpz Obkg== X-Gm-Message-State: APjAAAUI4VCyFJi6oT3WLkB/XBgdPTh0jmtO8y9ACxkicStceg6micXq Srd0DTddGYr8f6boIrzUrWcZCgbpqL0= X-Google-Smtp-Source: APXvYqwjGrmwlbP67cAxOBoWrpPk6FwlPj8xUIyK9GJsk2OjFotgQsFgHX7W7vJb9Un2uuMuRW2EUg== X-Received: by 2002:a05:6000:1286:: with SMTP id f6mr13099948wrx.93.1555323053789; Mon, 15 Apr 2019 03:10:53 -0700 (PDT) Received: from localhost.localdomain ([2001:470:9e39::64]) by smtp.gmail.com with ESMTPSA id d6sm11592214wrp.9.2019.04.15.03.10.52 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 15 Apr 2019 03:10:53 -0700 (PDT) From: Jonas Gorski To: linux-clk@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-tegra@vger.kernel.org Subject: [PATCH RFT V2 2/8] clk: fractional-divider: add explicit big endian support Date: Mon, 15 Apr 2019 12:10:40 +0200 Message-Id: <20190415101046.5872-3-jonas.gorski@gmail.com> X-Mailer: git-send-email 2.13.2 In-Reply-To: <20190415101046.5872-1-jonas.gorski@gmail.com> References: <20190415101046.5872-1-jonas.gorski@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190415_031055_494672_9A90F5A2 X-CRM114-Status: GOOD ( 15.50 ) 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: Peter De Schrijver , Fabio Estevam , Heiko Stuebner , Stephen Boyd , Benjamin Herrenschmidt , Michael Turquette , Michal Simek , Jonathan Hunter , Prashant Gaikwad , Paul Mackerras , NXP Linux Team , Pengutronix Kernel Team , Michael Ellerman , Thierry Reding , Anatolij Gustschin , Shawn Guo , Sascha Hauer MIME-Version: 1.0 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 Add a clock specific flag to switch register accesses to big endian, to allow runtime configuration of big endian fractional divider clocks. Signed-off-by: Jonas Gorski --- V1 -> V2: * newly added patch drivers/clk/clk-fractional-divider.c | 22 +++++++++++++++++++--- include/linux/clk-provider.h | 4 ++++ 2 files changed, 23 insertions(+), 3 deletions(-) diff --git a/drivers/clk/clk-fractional-divider.c b/drivers/clk/clk-fractional-divider.c index fdfe2e423d15..b9988d3b3828 100644 --- a/drivers/clk/clk-fractional-divider.c +++ b/drivers/clk/clk-fractional-divider.c @@ -13,6 +13,22 @@ #include #include +static inline u32 clk_fd_readl(struct clk_fractional_divider *fd) +{ + if (fd->flags & CLK_FRAC_DIVIDER_BIG_ENDIAN) + return ioread32be(fd->reg); + else + return clk_readl(fd->reg); +} + +static inline void clk_fd_writel(struct clk_fractional_divider *fd, u32 val) +{ + if (fd->flags & CLK_FRAC_DIVIDER_BIG_ENDIAN) + iowrite32be(val, fd->reg); + else + clk_writel(val, fd->reg); +} + static unsigned long clk_fd_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { @@ -27,7 +43,7 @@ static unsigned long clk_fd_recalc_rate(struct clk_hw *hw, else __acquire(fd->lock); - val = clk_readl(fd->reg); + val = clk_fd_readl(fd); if (fd->lock) spin_unlock_irqrestore(fd->lock, flags); @@ -115,10 +131,10 @@ static int clk_fd_set_rate(struct clk_hw *hw, unsigned long rate, else __acquire(fd->lock); - val = clk_readl(fd->reg); + val = clk_fd_readl(fd); val &= ~(fd->mmask | fd->nmask); val |= (m << fd->mshift) | (n << fd->nshift); - clk_writel(val, fd->reg); + clk_fd_writel(fd, val); if (fd->lock) spin_unlock_irqrestore(fd->lock, flags); diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 7117b8cc0c0c..8c07d810acf5 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -607,6 +607,9 @@ void clk_hw_unregister_fixed_factor(struct clk_hw *hw); * is the value read from the register. If CLK_FRAC_DIVIDER_ZERO_BASED * is set then the numerator and denominator are both the value read * plus one. + * CLK_FRAC_DIVIDER_BIG_ENDIAN - By default little endian register accesses are + * used for the divider register. Setting this flag makes the register + * accesses big endian. */ struct clk_fractional_divider { struct clk_hw hw; @@ -627,6 +630,7 @@ struct clk_fractional_divider { #define to_clk_fd(_hw) container_of(_hw, struct clk_fractional_divider, hw) #define CLK_FRAC_DIVIDER_ZERO_BASED BIT(0) +#define CLK_FRAC_DIVIDER_BIG_ENDIAN BIT(1) extern const struct clk_ops clk_fractional_divider_ops; struct clk *clk_register_fractional_divider(struct device *dev,