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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 124E8C32793 for ; Wed, 24 Aug 2022 15:17:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237831AbiHXPRl (ORCPT ); Wed, 24 Aug 2022 11:17:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44950 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237364AbiHXPRj (ORCPT ); Wed, 24 Aug 2022 11:17:39 -0400 Received: from vps0.lunn.ch (vps0.lunn.ch [185.16.172.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 579BD9751A; Wed, 24 Aug 2022 08:17:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lunn.ch; s=20171124; h=In-Reply-To:Content-Disposition:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:From:Sender:Reply-To:Subject: Date:Message-ID:To:Cc:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:Content-Disposition:In-Reply-To:References; bh=/DMqll070o37agD4hsR3LykeohYCZM/DzML8AAPUSfc=; b=tBUcZ/ifE4bkciSs79+f9iLzeP WojU4oFOqOdyCzMkrzzLtGQpH7LHlksMfsaPhAYRqLX9H1+KlQjZToDI0I63CaOLZW6+QaZFCfF4z jICERoj4yl9fQ4FAql0gXN7ig63gl7b1IRvz2dW+7YKU6wItW8iAx8dMQ9ngZksgBu9A=; Received: from andrew by vps0.lunn.ch with local (Exim 4.94.2) (envelope-from ) id 1oQs83-00ESQC-Hb; Wed, 24 Aug 2022 17:17:15 +0200 Date: Wed, 24 Aug 2022 17:17:15 +0200 From: Andrew Lunn To: "xiaowu.ding" Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, linux@armlinux.org.uk, nicolas.ferre@microchip.com, claudiu.beznea@microchip.com, palmer@dabbelt.com, paul.walmsley@sifive.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: Re: [PATCH net-next] driver: cadence macb driver support acpi mode Message-ID: References: <20220824121351.578-1-xiaowu.ding@jaguarmicro.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220824121351.578-1-xiaowu.ding@jaguarmicro.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > +/* On ACPI platforms, clocks are controlled by firmware and/or > + * ACPI, not by drivers.Need to store the clock value. > + */ > +struct macb_acpi_config { > + u32 hclk_rate; /* amba clock rate*/ > + u32 pclk_rate; /* amba apb clock rate*/ > + u32 txclk_rate; /* tx clock rate*/ > + u32 rxclk_rate; /* rx clock rate*/ > + u32 tsuclk_rate; /* tx clock rate*/ > + bool acpi_enable; /* is acpi or not */ > +}; > +static int macb_acpi_support(struct macb *bp) > +{ > + struct device *dev = &bp->pdev->dev; > + struct macb_acpi_config *config = &bp->acpicfg; > + int ret; > + u32 property; > + > + /*acpi must be report the pclk*/ > + property = 0; > + ret = device_property_read_u32(dev, MACB_SYSPCLOCK, &property); > + if (ret) { > + dev_err(dev, "unable to obtain %s property\n", MACB_SYSPCLOCK); > + return ret; > + } > + > + config->pclk_rate = property; It seems like you could make this simpler by just calling clk_hw_register_fixed_rate(dev, "pclk", NULL, 0, property); You then don't need to modify any other code with respect to clocks. The clock does exist, so model it in the common clock framework. Andrew