From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1A4ABC11F69 for ; Fri, 2 Jul 2021 01:04:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E7916613F7 for ; Fri, 2 Jul 2021 01:04:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234576AbhGBBGv (ORCPT ); Thu, 1 Jul 2021 21:06:51 -0400 Received: from mail.kernel.org ([198.145.29.99]:49724 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230369AbhGBBGv (ORCPT ); Thu, 1 Jul 2021 21:06:51 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id EC320613DA; Fri, 2 Jul 2021 01:04:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625187860; bh=6lTjGlBo1chEWk8zH/z2MaOn2rpR7j/WephiT1Q6uDE=; h=In-Reply-To:References:Subject:From:Cc:To:Date:From; b=IP+Y2SZXVQQb5iXv1/hQ7YV6dfKIcp5Ti5vkvU+HiW7ojIKVho+h2BN0WKEDeruDu /TZP3qDxT8uOpuhgT1ojJ7+GjalDMrFj4y2cMKgUY1kZ2qMmqw6iZnV2W56h5Zn9BS c+VAndazUNxxr4jFisx0dOOLi/ONSdyTrU9/OONI2NEwLu0C65voJUelDnKFVd5QlH 6vZjqaBWXVrIq+3xstRPlP0hkCrAxiAz/PlIQVe5eG3kFQXtNw8gmF5JkPhlwsp/HM zmV2uVqtseKHDIMRjHxfxBgvwot4lx5tLaz5uD9THlQ+4Mekw1D5BRIA5ChFScRGfv 749U3EfjsiCYQ== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable In-Reply-To: <20210627223959.188139-3-martin.blumenstingl@googlemail.com> References: <20210627223959.188139-1-martin.blumenstingl@googlemail.com> <20210627223959.188139-3-martin.blumenstingl@googlemail.com> Subject: Re: [PATCH v3 2/3] clk: divider: Switch from .round_rate to .determine_rate by default From: Stephen Boyd Cc: narmstrong@baylibre.com, jbrunet@baylibre.com, khilman@baylibre.com, linux-kernel@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Martin Blumenstingl To: Martin Blumenstingl , linux-clk@vger.kernel.org, mturquette@baylibre.com Date: Thu, 01 Jul 2021 18:04:18 -0700 Message-ID: <162518785878.3570193.8070459883237401552@swboyd.mtv.corp.google.com> User-Agent: alot/0.9.1 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Quoting Martin Blumenstingl (2021-06-27 15:39:58) > .determine_rate is meant to replace .round_rate. The former comes with a > benefit which is especially relevant on 32-bit systems: since > .determine_rate uses an "unsigned long" (compared to a "signed long" > which is used by .round_rate) the maximum value on 32-bit systems > increases from 2^31 (or approx. 2.14GHz) to 2^32 (or approx. 4.29GHz). > Switch to a .determine_rate implementation by default so 32-bit systems > can benefit from the increased maximum value as well as so we have one > fewer user of .round_rate. >=20 > Reviewed-by: Jerome Brunet > Signed-off-by: Martin Blumenstingl > --- > drivers/clk/clk-divider.c | 18 +++++++++--------- > 1 file changed, 9 insertions(+), 9 deletions(-) >=20 > diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c > index 87ba4966b0e8..9e05e81116af 100644 > --- a/drivers/clk/clk-divider.c > +++ b/drivers/clk/clk-divider.c > @@ -425,8 +425,8 @@ long divider_ro_round_rate_parent(struct clk_hw *hw, = struct clk_hw *parent, > } > EXPORT_SYMBOL_GPL(divider_ro_round_rate_parent); > =20 > -static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate, > - unsigned long *prate) > +static int clk_divider_determine_rate(struct clk_hw *hw, > + struct clk_rate_request *req) > { > struct clk_divider *divider =3D to_clk_divider(hw); > =20 > @@ -437,13 +437,13 @@ static long clk_divider_round_rate(struct clk_hw *h= w, unsigned long rate, > val =3D clk_div_readl(divider) >> divider->shift; > val &=3D clk_div_mask(divider->width); > =20 > - return divider_ro_round_rate(hw, rate, prate, divider->ta= ble, > - divider->width, divider->fla= gs, > - val); > + return divider_ro_determine_rate(hw, req, divider->table, > + divider->width, > + divider->flags, val); > } > =20 > - return divider_round_rate(hw, rate, prate, divider->table, > - divider->width, divider->flags); > + return divider_determine_rate(hw, req, divider->table, divider->w= idth, > + divider->flags); > } > =20 > int divider_get_val(unsigned long rate, unsigned long parent_rate, > @@ -500,14 +500,14 @@ static int clk_divider_set_rate(struct clk_hw *hw, = unsigned long rate, > =20 > const struct clk_ops clk_divider_ops =3D { > .recalc_rate =3D clk_divider_recalc_rate, > - .round_rate =3D clk_divider_round_rate, > + .determine_rate =3D clk_divider_determine_rate, Guess was right. $ git grep clk_divider_ops -- drivers/clk/imx/ drivers/clk/imx/clk-divider-gate.c: return clk_divider_ops.round_rate(= hw, rate, prate); > .set_rate =3D clk_divider_set_rate, > }; > EXPORT_SYMBOL_GPL(clk_divider_ops); > =20 > const struct clk_ops clk_divider_ro_ops =3D { > .recalc_rate =3D clk_divider_recalc_rate, > - .round_rate =3D clk_divider_round_rate, > + .determine_rate =3D clk_divider_determine_rate, From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 17F0DC11F67 for ; Fri, 2 Jul 2021 01:06:15 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D3DC561410 for ; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Quoting Martin Blumenstingl (2021-06-27 15:39:58) > .determine_rate is meant to replace .round_rate. The former comes with a > benefit which is especially relevant on 32-bit systems: since > .determine_rate uses an "unsigned long" (compared to a "signed long" > which is used by .round_rate) the maximum value on 32-bit systems > increases from 2^31 (or approx. 2.14GHz) to 2^32 (or approx. 4.29GHz). > Switch to a .determine_rate implementation by default so 32-bit systems > can benefit from the increased maximum value as well as so we have one > fewer user of .round_rate. > > Reviewed-by: Jerome Brunet > Signed-off-by: Martin Blumenstingl > --- > drivers/clk/clk-divider.c | 18 +++++++++--------- > 1 file changed, 9 insertions(+), 9 deletions(-) > > diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c > index 87ba4966b0e8..9e05e81116af 100644 > --- a/drivers/clk/clk-divider.c > +++ b/drivers/clk/clk-divider.c > @@ -425,8 +425,8 @@ long divider_ro_round_rate_parent(struct clk_hw *hw, struct clk_hw *parent, > } > EXPORT_SYMBOL_GPL(divider_ro_round_rate_parent); > > -static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate, > - unsigned long *prate) > +static int clk_divider_determine_rate(struct clk_hw *hw, > + struct clk_rate_request *req) > { > struct clk_divider *divider = to_clk_divider(hw); > > @@ -437,13 +437,13 @@ static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate, > val = clk_div_readl(divider) >> divider->shift; > val &= clk_div_mask(divider->width); > > - return divider_ro_round_rate(hw, rate, prate, divider->table, > - divider->width, divider->flags, > - val); > + return divider_ro_determine_rate(hw, req, divider->table, > + divider->width, > + divider->flags, val); > } > > - return divider_round_rate(hw, rate, prate, divider->table, > - divider->width, divider->flags); > + return divider_determine_rate(hw, req, divider->table, divider->width, > + divider->flags); > } > > int divider_get_val(unsigned long rate, unsigned long parent_rate, > @@ -500,14 +500,14 @@ static int clk_divider_set_rate(struct clk_hw *hw, unsigned long rate, > > const struct clk_ops clk_divider_ops = { > .recalc_rate = clk_divider_recalc_rate, > - .round_rate = clk_divider_round_rate, > + .determine_rate = clk_divider_determine_rate, Guess was right. $ git grep clk_divider_ops -- drivers/clk/imx/ drivers/clk/imx/clk-divider-gate.c: return clk_divider_ops.round_rate(hw, rate, prate); > .set_rate = clk_divider_set_rate, > }; > EXPORT_SYMBOL_GPL(clk_divider_ops); > > const struct clk_ops clk_divider_ro_ops = { > .recalc_rate = clk_divider_recalc_rate, > - .round_rate = clk_divider_round_rate, > + .determine_rate = clk_divider_determine_rate, _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AB30FC11F67 for ; Fri, 2 Jul 2021 01:04:31 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 71D71613DA for ; 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Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1lz7bU-001i6n-7D; Fri, 02 Jul 2021 01:04:24 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1lz7bQ-001i61-G3; Fri, 02 Jul 2021 01:04:21 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id EC320613DA; Fri, 2 Jul 2021 01:04:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625187860; bh=6lTjGlBo1chEWk8zH/z2MaOn2rpR7j/WephiT1Q6uDE=; h=In-Reply-To:References:Subject:From:Cc:To:Date:From; b=IP+Y2SZXVQQb5iXv1/hQ7YV6dfKIcp5Ti5vkvU+HiW7ojIKVho+h2BN0WKEDeruDu /TZP3qDxT8uOpuhgT1ojJ7+GjalDMrFj4y2cMKgUY1kZ2qMmqw6iZnV2W56h5Zn9BS c+VAndazUNxxr4jFisx0dOOLi/ONSdyTrU9/OONI2NEwLu0C65voJUelDnKFVd5QlH 6vZjqaBWXVrIq+3xstRPlP0hkCrAxiAz/PlIQVe5eG3kFQXtNw8gmF5JkPhlwsp/HM zmV2uVqtseKHDIMRjHxfxBgvwot4lx5tLaz5uD9THlQ+4Mekw1D5BRIA5ChFScRGfv 749U3EfjsiCYQ== MIME-Version: 1.0 In-Reply-To: <20210627223959.188139-3-martin.blumenstingl@googlemail.com> References: <20210627223959.188139-1-martin.blumenstingl@googlemail.com> <20210627223959.188139-3-martin.blumenstingl@googlemail.com> Subject: Re: [PATCH v3 2/3] clk: divider: Switch from .round_rate to .determine_rate by default From: Stephen Boyd Cc: narmstrong@baylibre.com, jbrunet@baylibre.com, khilman@baylibre.com, linux-kernel@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Martin Blumenstingl To: Martin Blumenstingl , linux-clk@vger.kernel.org, mturquette@baylibre.com Date: Thu, 01 Jul 2021 18:04:18 -0700 Message-ID: <162518785878.3570193.8070459883237401552@swboyd.mtv.corp.google.com> User-Agent: alot/0.9.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210701_180420_612119_54343BA0 X-CRM114-Status: GOOD ( 17.27 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org Quoting Martin Blumenstingl (2021-06-27 15:39:58) > .determine_rate is meant to replace .round_rate. The former comes with a > benefit which is especially relevant on 32-bit systems: since > .determine_rate uses an "unsigned long" (compared to a "signed long" > which is used by .round_rate) the maximum value on 32-bit systems > increases from 2^31 (or approx. 2.14GHz) to 2^32 (or approx. 4.29GHz). > Switch to a .determine_rate implementation by default so 32-bit systems > can benefit from the increased maximum value as well as so we have one > fewer user of .round_rate. > > Reviewed-by: Jerome Brunet > Signed-off-by: Martin Blumenstingl > --- > drivers/clk/clk-divider.c | 18 +++++++++--------- > 1 file changed, 9 insertions(+), 9 deletions(-) > > diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c > index 87ba4966b0e8..9e05e81116af 100644 > --- a/drivers/clk/clk-divider.c > +++ b/drivers/clk/clk-divider.c > @@ -425,8 +425,8 @@ long divider_ro_round_rate_parent(struct clk_hw *hw, struct clk_hw *parent, > } > EXPORT_SYMBOL_GPL(divider_ro_round_rate_parent); > > -static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate, > - unsigned long *prate) > +static int clk_divider_determine_rate(struct clk_hw *hw, > + struct clk_rate_request *req) > { > struct clk_divider *divider = to_clk_divider(hw); > > @@ -437,13 +437,13 @@ static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate, > val = clk_div_readl(divider) >> divider->shift; > val &= clk_div_mask(divider->width); > > - return divider_ro_round_rate(hw, rate, prate, divider->table, > - divider->width, divider->flags, > - val); > + return divider_ro_determine_rate(hw, req, divider->table, > + divider->width, > + divider->flags, val); > } > > - return divider_round_rate(hw, rate, prate, divider->table, > - divider->width, divider->flags); > + return divider_determine_rate(hw, req, divider->table, divider->width, > + divider->flags); > } > > int divider_get_val(unsigned long rate, unsigned long parent_rate, > @@ -500,14 +500,14 @@ static int clk_divider_set_rate(struct clk_hw *hw, unsigned long rate, > > const struct clk_ops clk_divider_ops = { > .recalc_rate = clk_divider_recalc_rate, > - .round_rate = clk_divider_round_rate, > + .determine_rate = clk_divider_determine_rate, Guess was right. $ git grep clk_divider_ops -- drivers/clk/imx/ drivers/clk/imx/clk-divider-gate.c: return clk_divider_ops.round_rate(hw, rate, prate); > .set_rate = clk_divider_set_rate, > }; > EXPORT_SYMBOL_GPL(clk_divider_ops); > > const struct clk_ops clk_divider_ro_ops = { > .recalc_rate = clk_divider_recalc_rate, > - .round_rate = clk_divider_round_rate, > + .determine_rate = clk_divider_determine_rate, _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic