From patchwork Fri Jan 10 11:47:10 2025 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: 13934356 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 4945AE77188 for ; Fri, 10 Jan 2025 11:51:44 +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=YJDQbifl3S3nXYi/s4G7WO8DDH38sOs3MfxUL+uTTjY=; b=wtRUcnX/lr++oB03iOW36B/J1b MK9NwctE6NOJjQGZgPFT5+OOHyn+PRr073IOt0BAzXpnfE2NGyASqY/O0IeKUCRXdyICnCAQVoodp eAJSMauWiPqm3DlrZWeH3y/dgK5dX7xcro9dY1g+nzsnW6t6fDjGEG7QZaxj7F8emYVGQw9WTWJ+b D/ilGDw4hk9Z6gEo08fPHzitRhq+95Z26KRzWqNrYUcAlTJ6Wj8wc/Q5/uSnqIx7JPITx+eaWfAE+ yxzbZF83RvgLI1Mia4YJmKwvcOHskbi3BCbj7dtFaG66IpIlp8hlqc7072uaq64lRW23GS6PoAbx2 WYqlhTvQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tWDY5-0000000FAhl-1wMu; Fri, 10 Jan 2025 11:51:33 +0000 Received: from nyc.source.kernel.org ([147.75.193.91]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tWDUU-0000000FA1f-1sCS; Fri, 10 Jan 2025 11:47:52 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id C44EEA419FB; Fri, 10 Jan 2025 11:46:00 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id E0FA1C4CEE0; Fri, 10 Jan 2025 11:47:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1736509668; bh=2LuqfPJMjVZ/DDPyRk3omDydC7N76YqAGAm21Z7ZFXk=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=i4Vye6nlN8OTpRoVDWqva4QwMK0gSKfbmkEu+tBlYAW2PNLgxS6E+lKjOCahPs7JU vVjDFpFTHUt9IUYjYveEE94LQrjRwbRSmw0T1e7Gc/S2NmFUiAcCdrh6GQNOR1YIFl Jcp9AXqs6t9rDKDC1+Kr+Y8IpqHd/6smiU/YQamWq37nX2aMBmvMv9DzrhKGZjgljK LCtMTQ54Q5+9BwQBhdx1Ld2P1c9R13dMp9wk0rZRpNShhV/H8cX0iiRtf00sxpmLDC SroI3TQODdVyTGUO9SZwAoX1s+8EWGwJ47gPQLTAkYLa1+MAJ+1FdroiJN9RHucD/k 52LIPFxKH/Piw== 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 CFB43E7719D; Fri, 10 Jan 2025 11:47:48 +0000 (UTC) From: Chuan Liu via B4 Relay Date: Fri, 10 Jan 2025 19:47:10 +0800 Subject: [PATCH 1/2] clk: Add initialize the rate boundaries of the clk provider MIME-Version: 1.0 Message-Id: <20250110-limit-rate-range-of-clk-v1-1-dd618adc4aa8@amlogic.com> References: <20250110-limit-rate-range-of-clk-v1-0-dd618adc4aa8@amlogic.com> In-Reply-To: <20250110-limit-rate-range-of-clk-v1-0-dd618adc4aa8@amlogic.com> To: Michael Turquette , Stephen Boyd , Neil Armstrong , Jerome Brunet , Kevin Hilman , Martin Blumenstingl Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Chuan Liu X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1736509666; l=1896; i=chuan.liu@amlogic.com; s=20240902; h=from:subject:message-id; bh=NLbcI+Nns/2o6n4G9nqU4NOW+TQbJwF6LoFvcGM+2I4=; b=/HIhXIBeMDoFfKkG+m2ONfOOFLZiafM1eyQll49aSyxL2rXP4aEC5eWqUqKBgLD+IC9SM+MwL MB/kqgbTb4DCcVAFh9ZPihXtnYXLBLiD4tVb9iZtoh0zjY6mcTxVxc9 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-20250110_034750_650298_10952C4F X-CRM114-Status: GOOD ( 11.94 ) 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 The rate boundaries output by different clk providers vary due to hardware limitations. When registering the clk, limit the rate boundaries of the clk provider to prevent setting the rate of the clk provider beyond the design specifications and causing abnormal conditions. Signed-off-by: Chuan Liu --- drivers/clk/clk.c | 4 ++-- include/linux/clk-provider.h | 4 ++++ 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 9b45fa005030..36e4b4f16f1d 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -4359,8 +4359,8 @@ __clk_register(struct device *dev, struct device_node *np, struct clk_hw *hw) core->hw = hw; core->flags = init->flags; core->num_parents = init->num_parents; - core->min_rate = 0; - core->max_rate = ULONG_MAX; + core->min_rate = init->min_rate ? init->min_rate : 0; + core->max_rate = init->max_rate ? init->max_rate : ULONG_MAX; ret = clk_core_populate_parent_map(core, init); if (ret) diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 2e6e603b7493..46cfc342819e 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -294,6 +294,8 @@ struct clk_parent_data { * @parent_hws: array of pointers to all possible parents (when all parents * are internal to the clk controller) * @num_parents: number of possible parents + * @min_rate: min rate provided by the clk provider + * @max_rate: max rate provided by the clk provider * @flags: framework-level hints and quirks */ struct clk_init_data { @@ -304,6 +306,8 @@ struct clk_init_data { const struct clk_parent_data *parent_data; const struct clk_hw **parent_hws; u8 num_parents; + unsigned long min_rate; + unsigned long max_rate; unsigned long flags; };