From patchwork Fri Sep 6 10:34:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chuan Liu via B4 Relay X-Patchwork-Id: 13793915 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 19A5ACE7AFE for ; Fri, 6 Sep 2024 10:38:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Reply-To:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To: References:Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version: Subject:Date:From:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=obJH8D/d9n9ZIzUGPy3+w+L9A7Xc6spQ67mx4jYJPfU=; b=PzC0UP0Ox8dCT2EWjfrVfdX0V5 xCLDytWpQHp7+tqCcn7U/QLvzDeH3IEly5C1Cl0KsKY2O9mdRGQmYapCy19ZjhWeayNkYjA5Hg5BV 4Db8xsLxFmzcPYxfUotmCfi3vehqNOqxpDL2hII1/HL5hhQSqOxQMkMFJqzqnxAqdezVILBBCF8Ek x7j0jvfylOXaaMV9DDxWwJ55yIR9K/l+OR2xg2tbRQUon1WdtSpui7F49MLmVZPhNWn7r1nfY9y+U AIu60uJYnSilW8iig6PxqfORXO/X6R9ygTk+OaWkEXsNkUE4LqYFc+kbbxzBlKpDrRsc0gmFGu6hh uuX3gKQA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1smWLr-0000000BnB3-1EQy; Fri, 06 Sep 2024 10:38:03 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1smWIt-0000000BmTV-0Pw6; Fri, 06 Sep 2024 10:35:01 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id CF0725C5BB7; Fri, 6 Sep 2024 10:34:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 00445C4CEC5; Fri, 6 Sep 2024 10:34:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1725618898; bh=Q5Nu6ki00BNEPUpMCqJOMGrigpdjNMijiEiU0fOJHMs=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=feLd2oA2h1fpNCwu7OpYQg6Jto2lrd2wkK8rIboKdt5MEPbWf8DvzVpLyDlb2+JF1 xS81og+9ExOQU8Hiy7c4cpSGLIrljE3hzX6juND7ZQxvH2qX+R5JHsIocdeokZ8PjG 5KC83NKiI617ls/Ki73IxaFbL0byLlalpjCAqdaasuJh1CjMTtGYOUWTyIyE0PJyFy Yz6KFOaNMOTNAOq9rWnTahxmQRquAGsADK7WmHG8y1XcKSXfIgtV2FvkIirhJggiwY r8u+g4skA+DftSPhHlfORbz78/eGGezkuaOtfioeoBvW5ekwCYwG2E4oZ168wmgiSt KE6zIpKX+G5iQ== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id E02A6CE7AFD; Fri, 6 Sep 2024 10:34:57 +0000 (UTC) From: Chuan Liu via B4 Relay Date: Fri, 06 Sep 2024 18:34:40 +0800 Subject: [PATCH v2 1/3] clk: meson: Support PLL with fixed fractional denominators MIME-Version: 1.0 Message-Id: <20240906-fix_clk-v2-1-7a3941eb2cdf@amlogic.com> References: <20240906-fix_clk-v2-0-7a3941eb2cdf@amlogic.com> In-Reply-To: <20240906-fix_clk-v2-0-7a3941eb2cdf@amlogic.com> To: Neil Armstrong , Jerome Brunet , Michael Turquette , Stephen Boyd , Kevin Hilman , Martin Blumenstingl Cc: linux-amlogic@lists.infradead.org, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Chuan Liu X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1725618896; l=1859; i=chuan.liu@amlogic.com; s=20240902; h=from:subject:message-id; bh=sWmncD36tYvYasLV2agsUM1OmEI/Pbp0y7H5RQI6gyA=; b=4/xHBnoby8jx3W1+dFt1CO/FshqhvP3WwGUal1rMsRXHWSq+LWZPSvMSKC2/icWrRMR/HUXnO PsJNpbDCIRdClPh2zEqrnCf1n7wS7rEGGn5JB6cxFetc3LLQkMSdhul X-Developer-Key: i=chuan.liu@amlogic.com; a=ed25519; pk=fnKDB+81SoWGKW2GJNFkKy/ULvsDmJZRGBE7pR5Xcpo= X-Endpoint-Received: by B4 Relay for chuan.liu@amlogic.com/20240902 with auth_id=203 X-Original-From: Chuan Liu X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240906_033459_306138_9839BBC4 X-CRM114-Status: GOOD ( 11.44 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: chuan.liu@amlogic.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Chuan Liu Some PLLS with fractional multipliers have fractional denominators with fixed values, instead of the previous "(1 << pll-> frc.width)". Signed-off-by: Chuan Liu --- drivers/clk/meson/clk-pll.c | 8 +++++--- drivers/clk/meson/clk-pll.h | 1 + 2 files changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/clk/meson/clk-pll.c b/drivers/clk/meson/clk-pll.c index bc570a2ff3a3..a141ab450009 100644 --- a/drivers/clk/meson/clk-pll.c +++ b/drivers/clk/meson/clk-pll.c @@ -57,12 +57,13 @@ static unsigned long __pll_params_to_rate(unsigned long parent_rate, struct meson_clk_pll_data *pll) { u64 rate = (u64)parent_rate * m; + unsigned int frac_max = unlikely(pll->frac_max) ? pll->frac_max : + (1 << pll->frac.width); if (frac && MESON_PARM_APPLICABLE(&pll->frac)) { u64 frac_rate = (u64)parent_rate * frac; - rate += DIV_ROUND_UP_ULL(frac_rate, - (1 << pll->frac.width)); + rate += DIV_ROUND_UP_ULL(frac_rate, frac_max); } return DIV_ROUND_UP_ULL(rate, n); @@ -100,7 +101,8 @@ static unsigned int __pll_params_with_frac(unsigned long rate, unsigned int n, struct meson_clk_pll_data *pll) { - unsigned int frac_max = (1 << pll->frac.width); + unsigned int frac_max = unlikely(pll->frac_max) ? pll->frac_max : + (1 << pll->frac.width); u64 val = (u64)rate * n; /* Bail out if we are already over the requested rate */ diff --git a/drivers/clk/meson/clk-pll.h b/drivers/clk/meson/clk-pll.h index 7b6b87274073..949157fb7bf5 100644 --- a/drivers/clk/meson/clk-pll.h +++ b/drivers/clk/meson/clk-pll.h @@ -43,6 +43,7 @@ struct meson_clk_pll_data { unsigned int init_count; const struct pll_params_table *table; const struct pll_mult_range *range; + unsigned int frac_max; u8 flags; };