From patchwork Tue Nov 22 13:07:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 13052331 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B658FC4332F for ; Tue, 22 Nov 2022 13:07:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233121AbiKVNHN (ORCPT ); Tue, 22 Nov 2022 08:07:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36124 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229505AbiKVNHL (ORCPT ); Tue, 22 Nov 2022 08:07:11 -0500 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B8DF62072; Tue, 22 Nov 2022 05:07:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1669122430; x=1700658430; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=13YUW771QBcON+nmTqGzaH6KQD1PytOjrL6vf8Gczwk=; b=dkbSM5QkM7sH8M+BvN90iLnDE/D+ElsbpyLfQwMkdnbvL7HlbfWJIHZ/ d/+E+IgZbCXkGVbA+6cXp79Stfl2W3A7Lo2yWZdwz/tiv/a3x2xT2n47n hm+WWCSLaVImYyt4nZWfF/qcLyNUagNombtsPdwSbIjrGvnAQZ0Z969fS mFtF5LtkAQhuLnDfLtH3lJpSyP57iGgASg2AJH44nWLiu7FHPYor5avU6 n7N4ZjxCxEgsi7JlIJd+nh5//BR/wh/CXvsxMxTNA089vn11wZ7nwRNih YICb9wsoMhga1Hn0A+sI4dbu6UcSzDYbOwJlTVT6TLdg5uwjVIqhkoyBr w==; X-IronPort-AV: E=McAfee;i="6500,9779,10538"; a="301358043" X-IronPort-AV: E=Sophos;i="5.96,184,1665471600"; d="scan'208";a="301358043" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Nov 2022 05:07:09 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10538"; a="619206109" X-IronPort-AV: E=Sophos;i="5.96,184,1665471600"; d="scan'208";a="619206109" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga006.jf.intel.com with ESMTP; 22 Nov 2022 05:07:08 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id D206B128; Tue, 22 Nov 2022 15:07:33 +0200 (EET) From: Andy Shevchenko To: Andy Shevchenko , linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Michael Turquette , Stephen Boyd Subject: [PATCH v2 1/3] clk: fractional-divider: Split out clk_fd_get_div() helper Date: Tue, 22 Nov 2022 15:07:30 +0200 Message-Id: <20221122130732.48537-1-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org Split out clk_fd_get_div() helper for the future use elsewhere. Signed-off-by: Andy Shevchenko --- v2: no changes drivers/clk/clk-fractional-divider.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) diff --git a/drivers/clk/clk-fractional-divider.c b/drivers/clk/clk-fractional-divider.c index 8efa5142ff8c..5c6f1d0f8fb4 100644 --- a/drivers/clk/clk-fractional-divider.c +++ b/drivers/clk/clk-fractional-divider.c @@ -40,6 +40,7 @@ #include #include +#include #include #include #include @@ -63,14 +64,12 @@ static inline void clk_fd_writel(struct clk_fractional_divider *fd, u32 val) writel(val, fd->reg); } -static unsigned long clk_fd_recalc_rate(struct clk_hw *hw, - unsigned long parent_rate) +static void clk_fd_get_div(struct clk_hw *hw, struct u32_fract *fract) { struct clk_fractional_divider *fd = to_clk_fd(hw); unsigned long flags = 0; unsigned long m, n; u32 val; - u64 ret; if (fd->lock) spin_lock_irqsave(fd->lock, flags); @@ -92,11 +91,22 @@ static unsigned long clk_fd_recalc_rate(struct clk_hw *hw, n++; } - if (!n || !m) + fract->numerator = m; + fract->denominator = n; +} + +static unsigned long clk_fd_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) +{ + struct u32_fract fract; + u64 ret; + + clk_fd_get_div(hw, &fract); + + if (!fract.numerator || !fract.denominator) return parent_rate; - ret = (u64)parent_rate * m; - do_div(ret, n); + ret = (u64)parent_rate * fract.numerator; + do_div(ret, fract.denominator); return ret; }