From patchwork Sat Dec 31 17:30:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Samuel Holland X-Patchwork-Id: 13086155 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 6BE51C4332F for ; Sat, 31 Dec 2022 17:31:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230015AbiLaRa7 (ORCPT ); Sat, 31 Dec 2022 12:30:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38968 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229694AbiLaRa6 (ORCPT ); Sat, 31 Dec 2022 12:30:58 -0500 Received: from out2-smtp.messagingengine.com (out2-smtp.messagingengine.com [66.111.4.26]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C85E238AF; Sat, 31 Dec 2022 09:30:57 -0800 (PST) Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailout.nyi.internal (Postfix) with ESMTP id 41C305C0086; Sat, 31 Dec 2022 12:30:57 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute5.internal (MEProxy); Sat, 31 Dec 2022 12:30:57 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sholland.org; h= cc:cc:content-transfer-encoding:date:date:from:from:in-reply-to :message-id:mime-version:reply-to:sender:subject:subject:to:to; s=fm3; t=1672507857; x=1672594257; bh=rAkPHCX9plm+ABZSDox55LMS1 3uIo7UeVXFHjSskAHQ=; b=Qo+VuWcep4oeUtwyEADa6CHvTwfGVZbGjif7a2tDY yaOJuMB+uFmLP4vDP1IpzFGe5v/SldOQBHCj6nuU2Klv87MY890lJnZ+VC6h3a6Q qfGYvYMCIMyWKL/tRJQS/dmbUhBA3lJ/1qDgRp7QD0DHGm1eCI7PlgbEZPi4uiLY kbfMrcsG7KMKC+MvAS9hUBLaR8bG8J0SmsYCaimRbn6hUZEGukaraUTpY/CzqASV OMFOA4Ew9nR0oCTpk5EkRBUqs6BRAXTizGzB7tBZi8mhRm6ssqlPmQpPzPvj0Rac CTsoTi6YSqYWK8jkM0YslUxGElEleE3fxJ1ZPkYcXnbXg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding:date:date :feedback-id:feedback-id:from:from:in-reply-to:message-id :mime-version:reply-to:sender:subject:subject:to:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm2; t= 1672507857; x=1672594257; bh=rAkPHCX9plm+ABZSDox55LMS13uIo7UeVXF HjSskAHQ=; b=jwAQQAoEnZQwzdJNOZ2c0YFbC8dROsSnDKxlPJ4ufuQuGuggjth tF9zy3jo9BSw+GH97lJiGWbOudhd3Vis0H6wHpyL2y1Y48S8KFgF42QqbY321v81 /Q555sswcdpg2UuhpSxEDTdvsnbj2Uy5JcrjqX4MvaQpdCNKxS6+kPvakAEEZEP3 9k2zq2HQIzzz3Ks0kGndN2AVHWuhsLA8xFSaTjkhHV6kDc/KG5+lqWYhvkK+EzAI eYBt4reUQlqScDr1N4D67Qplg+lXsOsPfAX78LieG2PJh00DYyrqNkWsJnOui0UW y94odSVxCV56yKLP0RFoXDRkTpndYb8/++w== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedrieekgddutddvucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephffvvefufffkofgggfestdekredtredttdenucfhrhhomhepufgrmhhuvghl ucfjohhllhgrnhguuceoshgrmhhuvghlsehshhholhhlrghnugdrohhrgheqnecuggftrf grthhtvghrnhepkeevlefhjeeuleeltedvjedvfeefteegleehueejffehgffffeekhefh hfekkeegnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomh epshgrmhhuvghlsehshhholhhlrghnugdrohhrgh X-ME-Proxy: Feedback-ID: i0ad843c9:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Sat, 31 Dec 2022 12:30:56 -0500 (EST) From: Samuel Holland To: Chen-Yu Tsai , Jernej Skrabec Cc: Samuel Holland , Michael Turquette , Stephen Boyd , linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-sunxi@lists.linux.dev Subject: [PATCH v2] clk: sunxi-ng: Avoid computing the rate twice Date: Sat, 31 Dec 2022 11:30:55 -0600 Message-Id: <20221231173055.42384-1-samuel@sholland.org> X-Mailer: git-send-email 2.37.4 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org The ccu_*_find_best() functions already compute a best_rate at the same time as the other factors. Return this value so the caller does not need to duplicate the computation. Signed-off-by: Samuel Holland Reviewed-by: Andre Przywara Reviewed-by: Jernej Skrabec --- Changes in v2: - Apply the same change also to nk, nkm, nkmp, and nm - Update the commit message drivers/clk/sunxi-ng/ccu_mp.c | 11 ++++++----- drivers/clk/sunxi-ng/ccu_nk.c | 9 +++++---- drivers/clk/sunxi-ng/ccu_nkm.c | 10 +++++----- drivers/clk/sunxi-ng/ccu_nkmp.c | 10 +++++----- drivers/clk/sunxi-ng/ccu_nm.c | 9 +++++---- 5 files changed, 26 insertions(+), 23 deletions(-) diff --git a/drivers/clk/sunxi-ng/ccu_mp.c b/drivers/clk/sunxi-ng/ccu_mp.c index 57cf2d615148..cc94a694cb67 100644 --- a/drivers/clk/sunxi-ng/ccu_mp.c +++ b/drivers/clk/sunxi-ng/ccu_mp.c @@ -10,9 +10,9 @@ #include "ccu_gate.h" #include "ccu_mp.h" -static void ccu_mp_find_best(unsigned long parent, unsigned long rate, - unsigned int max_m, unsigned int max_p, - unsigned int *m, unsigned int *p) +static unsigned long ccu_mp_find_best(unsigned long parent, unsigned long rate, + unsigned int max_m, unsigned int max_p, + unsigned int *m, unsigned int *p) { unsigned long best_rate = 0; unsigned int best_m = 0, best_p = 0; @@ -35,6 +35,8 @@ static void ccu_mp_find_best(unsigned long parent, unsigned long rate, *m = best_m; *p = best_p; + + return best_rate; } static unsigned long ccu_mp_find_best_with_parent_adj(struct clk_hw *hw, @@ -109,8 +111,7 @@ static unsigned long ccu_mp_round_rate(struct ccu_mux_internal *mux, max_p = cmp->p.max ?: 1 << ((1 << cmp->p.width) - 1); if (!clk_hw_can_set_rate_parent(&cmp->common.hw)) { - ccu_mp_find_best(*parent_rate, rate, max_m, max_p, &m, &p); - rate = *parent_rate / p / m; + rate = ccu_mp_find_best(*parent_rate, rate, max_m, max_p, &m, &p); } else { rate = ccu_mp_find_best_with_parent_adj(hw, parent_rate, rate, max_m, max_p); diff --git a/drivers/clk/sunxi-ng/ccu_nk.c b/drivers/clk/sunxi-ng/ccu_nk.c index c4fb82af97e8..8aa35d5804f3 100644 --- a/drivers/clk/sunxi-ng/ccu_nk.c +++ b/drivers/clk/sunxi-ng/ccu_nk.c @@ -15,8 +15,8 @@ struct _ccu_nk { unsigned long k, min_k, max_k; }; -static void ccu_nk_find_best(unsigned long parent, unsigned long rate, - struct _ccu_nk *nk) +static unsigned long ccu_nk_find_best(unsigned long parent, unsigned long rate, + struct _ccu_nk *nk) { unsigned long best_rate = 0; unsigned int best_k = 0, best_n = 0; @@ -39,6 +39,8 @@ static void ccu_nk_find_best(unsigned long parent, unsigned long rate, nk->k = best_k; nk->n = best_n; + + return best_rate; } static void ccu_nk_disable(struct clk_hw *hw) @@ -104,8 +106,7 @@ static long ccu_nk_round_rate(struct clk_hw *hw, unsigned long rate, _nk.min_k = nk->k.min ?: 1; _nk.max_k = nk->k.max ?: 1 << nk->k.width; - ccu_nk_find_best(*parent_rate, rate, &_nk); - rate = *parent_rate * _nk.n * _nk.k; + rate = ccu_nk_find_best(*parent_rate, rate, &_nk); if (nk->common.features & CCU_FEATURE_FIXED_POSTDIV) rate = rate / nk->fixed_post_div; diff --git a/drivers/clk/sunxi-ng/ccu_nkm.c b/drivers/clk/sunxi-ng/ccu_nkm.c index 67da2c189b53..a0978a50edae 100644 --- a/drivers/clk/sunxi-ng/ccu_nkm.c +++ b/drivers/clk/sunxi-ng/ccu_nkm.c @@ -16,8 +16,8 @@ struct _ccu_nkm { unsigned long m, min_m, max_m; }; -static void ccu_nkm_find_best(unsigned long parent, unsigned long rate, - struct _ccu_nkm *nkm) +static unsigned long ccu_nkm_find_best(unsigned long parent, unsigned long rate, + struct _ccu_nkm *nkm) { unsigned long best_rate = 0; unsigned long best_n = 0, best_k = 0, best_m = 0; @@ -45,6 +45,8 @@ static void ccu_nkm_find_best(unsigned long parent, unsigned long rate, nkm->n = best_n; nkm->k = best_k; nkm->m = best_m; + + return best_rate; } static void ccu_nkm_disable(struct clk_hw *hw) @@ -122,9 +124,7 @@ static unsigned long ccu_nkm_round_rate(struct ccu_mux_internal *mux, if (nkm->common.features & CCU_FEATURE_FIXED_POSTDIV) rate *= nkm->fixed_post_div; - ccu_nkm_find_best(*parent_rate, rate, &_nkm); - - rate = *parent_rate * _nkm.n * _nkm.k / _nkm.m; + rate = ccu_nkm_find_best(*parent_rate, rate, &_nkm); if (nkm->common.features & CCU_FEATURE_FIXED_POSTDIV) rate /= nkm->fixed_post_div; diff --git a/drivers/clk/sunxi-ng/ccu_nkmp.c b/drivers/clk/sunxi-ng/ccu_nkmp.c index 39413cb0985c..99359a06892d 100644 --- a/drivers/clk/sunxi-ng/ccu_nkmp.c +++ b/drivers/clk/sunxi-ng/ccu_nkmp.c @@ -29,8 +29,8 @@ static unsigned long ccu_nkmp_calc_rate(unsigned long parent, return rate; } -static void ccu_nkmp_find_best(unsigned long parent, unsigned long rate, - struct _ccu_nkmp *nkmp) +static unsigned long ccu_nkmp_find_best(unsigned long parent, unsigned long rate, + struct _ccu_nkmp *nkmp) { unsigned long best_rate = 0; unsigned long best_n = 0, best_k = 0, best_m = 0, best_p = 0; @@ -65,6 +65,8 @@ static void ccu_nkmp_find_best(unsigned long parent, unsigned long rate, nkmp->k = best_k; nkmp->m = best_m; nkmp->p = best_p; + + return best_rate; } static void ccu_nkmp_disable(struct clk_hw *hw) @@ -150,10 +152,8 @@ static long ccu_nkmp_round_rate(struct clk_hw *hw, unsigned long rate, _nkmp.min_p = 1; _nkmp.max_p = nkmp->p.max ?: 1 << ((1 << nkmp->p.width) - 1); - ccu_nkmp_find_best(*parent_rate, rate, &_nkmp); + rate = ccu_nkmp_find_best(*parent_rate, rate, &_nkmp); - rate = ccu_nkmp_calc_rate(*parent_rate, _nkmp.n, _nkmp.k, - _nkmp.m, _nkmp.p); if (nkmp->common.features & CCU_FEATURE_FIXED_POSTDIV) rate = rate / nkmp->fixed_post_div; diff --git a/drivers/clk/sunxi-ng/ccu_nm.c b/drivers/clk/sunxi-ng/ccu_nm.c index 9ca9257f4426..c1fd11542c45 100644 --- a/drivers/clk/sunxi-ng/ccu_nm.c +++ b/drivers/clk/sunxi-ng/ccu_nm.c @@ -27,8 +27,8 @@ static unsigned long ccu_nm_calc_rate(unsigned long parent, return rate; } -static void ccu_nm_find_best(unsigned long parent, unsigned long rate, - struct _ccu_nm *nm) +static unsigned long ccu_nm_find_best(unsigned long parent, unsigned long rate, + struct _ccu_nm *nm) { unsigned long best_rate = 0; unsigned long best_n = 0, best_m = 0; @@ -52,6 +52,8 @@ static void ccu_nm_find_best(unsigned long parent, unsigned long rate, nm->n = best_n; nm->m = best_m; + + return best_rate; } static void ccu_nm_disable(struct clk_hw *hw) @@ -157,8 +159,7 @@ static long ccu_nm_round_rate(struct clk_hw *hw, unsigned long rate, _nm.min_m = 1; _nm.max_m = nm->m.max ?: 1 << nm->m.width; - ccu_nm_find_best(*parent_rate, rate, &_nm); - rate = ccu_nm_calc_rate(*parent_rate, _nm.n, _nm.m); + rate = ccu_nm_find_best(*parent_rate, rate, &_nm); if (nm->common.features & CCU_FEATURE_FIXED_POSTDIV) rate /= nm->fixed_post_div;