From patchwork Wed May 17 07:40:34 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 9730229 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id DC0B5602DB for ; Wed, 17 May 2017 07:44:11 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CEA7E28718 for ; Wed, 17 May 2017 07:44:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C353C28716; Wed, 17 May 2017 07:44:11 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CB6AB28700 for ; Wed, 17 May 2017 07:44:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753725AbdEQHlV (ORCPT ); Wed, 17 May 2017 03:41:21 -0400 Received: from mail.free-electrons.com ([62.4.15.54]:47735 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753558AbdEQHlM (ORCPT ); Wed, 17 May 2017 03:41:12 -0400 Received: by mail.free-electrons.com (Postfix, from userid 110) id 4FF1020C7C; Wed, 17 May 2017 09:41:10 +0200 (CEST) Received: from localhost (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.free-electrons.com (Postfix) with ESMTPSA id 23FE320C8D; Wed, 17 May 2017 09:41:00 +0200 (CEST) From: Maxime Ripard To: Chen-Yu Tsai , Maxime Ripard , Mike Turquette , Stephen Boyd Cc: Daniel Vetter , David Airlie , dri-devel@lists.freedesktop.org, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Petazzoni Subject: [PATCH v3 05/21] clk: sunxi-ng: mux: split out the pre-divider computation code Date: Wed, 17 May 2017 09:40:34 +0200 Message-Id: <6d3e9ce05c3f58e42975136481a71fa5d556ad1c.1495006350.git-series.maxime.ripard@free-electrons.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: References: In-Reply-To: References: Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The pre-divider retrieval code was merged into the function to apply the current pre-divider onto the parent clock rate so that we can use that adjusted value to do our factors computation. However, since we'll need to do the reverse operation, we need to split out that code into a function that will be shared. Signed-off-by: Maxime Ripard Acked-by: Chen-Yu Tsai --- drivers/clk/sunxi-ng/ccu_mux.c | 32 ++++++++++++++++++++------------ 1 file changed, 20 insertions(+), 12 deletions(-) diff --git a/drivers/clk/sunxi-ng/ccu_mux.c b/drivers/clk/sunxi-ng/ccu_mux.c index 58b6e349a0ed..3eb23d4e6534 100644 --- a/drivers/clk/sunxi-ng/ccu_mux.c +++ b/drivers/clk/sunxi-ng/ccu_mux.c @@ -15,24 +15,20 @@ #include "ccu_gate.h" #include "ccu_mux.h" -void ccu_mux_helper_adjust_parent_for_prediv(struct ccu_common *common, - struct ccu_mux_internal *cm, - int parent_index, - unsigned long *parent_rate) +static u16 ccu_mux_get_prediv(struct ccu_common *common, + struct ccu_mux_internal *cm, + int parent_index) { u16 prediv = 1; u32 reg; - int i; if (!((common->features & CCU_FEATURE_FIXED_PREDIV) || (common->features & CCU_FEATURE_VARIABLE_PREDIV) || (common->features & CCU_FEATURE_ALL_PREDIV))) - return; + return 1; - if (common->features & CCU_FEATURE_ALL_PREDIV) { - *parent_rate = *parent_rate / common->prediv; - return; - } + if (common->features & CCU_FEATURE_ALL_PREDIV) + return common->prediv; reg = readl(common->base + common->reg); if (parent_index < 0) { @@ -40,10 +36,13 @@ void ccu_mux_helper_adjust_parent_for_prediv(struct ccu_common *common, parent_index &= (1 << cm->width) - 1; } - if (common->features & CCU_FEATURE_FIXED_PREDIV) + if (common->features & CCU_FEATURE_FIXED_PREDIV) { + int i; + for (i = 0; i < cm->n_predivs; i++) if (parent_index == cm->fixed_predivs[i].index) prediv = cm->fixed_predivs[i].div; + } if (common->features & CCU_FEATURE_VARIABLE_PREDIV) if (parent_index == cm->variable_prediv.index) { @@ -54,7 +53,16 @@ void ccu_mux_helper_adjust_parent_for_prediv(struct ccu_common *common, prediv = div + 1; } - *parent_rate = *parent_rate / prediv; + return prediv; +} + +void ccu_mux_helper_adjust_parent_for_prediv(struct ccu_common *common, + struct ccu_mux_internal *cm, + int parent_index, + unsigned long *parent_rate) +{ + *parent_rate = *parent_rate / ccu_mux_get_prediv(common, cm, + parent_index); } int ccu_mux_helper_determine_rate(struct ccu_common *common,