From patchwork Mon Sep 9 10:08:56 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: 13796594 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 CD251ECE57A for ; Mon, 9 Sep 2024 10:10:31 +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=6vLQ4byo2lwrmqUByTGmIk28V6Bq9vpjYY7KKUHmE2E=; b=GNlFHZGgymQV0nf8NtCudAOg/4 e0dXf35A/CnROIqLIdFlQvAzqX2MkZ1YqM8VxMAxdH/Eo7prXXAWiTRLrySPrty4ov7vlWBjMmmsh dEEjPy06sDQfkhcWbT2flhC4+T5LSNRsGW5zKE45RQqgBHMflW9GmeW8nhhuE7LAafTXC37+iZihX a4gpkxG0bk4T15DzX1uvYsSKJjji/3s5PZ4Ma5F9XeF+ZwTGGhgU2+cRDz8m6wSEe0JVbb6B90GXz vpqU3SWBn+86rLLF7oQpCytDhdG3eWS3R/zpKncbHN98G0eOEEjPRwUmHxKIMjz5nBy7d299ZOTgM O17XC+Og==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1snbLi-00000001SCn-3lx0; Mon, 09 Sep 2024 10:10:22 +0000 Received: from nyc.source.kernel.org ([2604:1380:45d1:ec00::3]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1snbKg-00000001Rt6-3hVs; Mon, 09 Sep 2024 10:09:20 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 45D44A4325D; Mon, 9 Sep 2024 10:09:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 61337C4CEC8; Mon, 9 Sep 2024 10:09:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1725876557; bh=RkUWT/0arfso8PoZuHXKVk1Cw40RK964zYOKCHpr3nE=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=EHnOH4k4ZdZj7SxH1Niavu5KXKFCh02h94MH3UcaYiXKHUSywi84ReEY4czfIYVQh 47f0B75OGH6xPtcZg6LZUAXE6XCpDPxhk9r2VuCsLLrDYhkz3zo5ifi7v5/2el0mjr SLA8fzJPRQPc+c89YHZMLI+3TF5MyxkHARsIW5YeHw3aTef8j1X5nxeBhct5cwZFUZ /iS1HgcxR4n0+GDYvx1evlvud5OnTjghoJC1iHQ+SiLNZ0swsTIOZOOglk83JefK2T WiMkwoUiinSFlF4DHZybJevCq/PwZj9yng7rzp5QS9AVmyaFB4jHWTjfabAZklkdUB CZNCIcaKZzVQA== 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 4EB12ECE579; Mon, 9 Sep 2024 10:09:17 +0000 (UTC) From: Chuan Liu via B4 Relay Date: Mon, 09 Sep 2024 18:08:56 +0800 Subject: [PATCH v3 1/3] clk: meson: Support PLL with fixed fractional denominators MIME-Version: 1.0 Message-Id: <20240909-fix_clk-v3-1-a6d8f6333c04@amlogic.com> References: <20240909-fix_clk-v3-0-a6d8f6333c04@amlogic.com> In-Reply-To: <20240909-fix_clk-v3-0-a6d8f6333c04@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=1725876555; l=1833; i=chuan.liu@amlogic.com; s=20240902; h=from:subject:message-id; bh=tm+eqZ6z2/fu+O9mUT6fjnN7chLjmdHoODAhOfI/R44=; b=U11cPwwTOmhBwh26n/Uf/6HYS90n2Yjr6nBrNusbctnjBVmkncO4x1YgCC6W4bb8CpHU6PAXJ FDIVkNCLdYHAyfiGCt9F3/9ZnyZv7DL6hWUl2tTSf0Oti+fqY3IWf+I 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-20240909_030919_079369_400AA3F5 X-CRM114-Status: GOOD ( 11.59 ) 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..89f0f04a16ab 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 = 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 = 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; };