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[46.138.85.91]) by smtp.googlemail.com with ESMTPSA id h22sm11140ljk.133.2021.08.18.08.05.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 18 Aug 2021 08:05:23 -0700 (PDT) Subject: Re: [PATCH v8 07/34] clk: tegra: Support runtime PM and power domain To: Thierry Reding Cc: Jonathan Hunter , Ulf Hansson , Viresh Kumar , Stephen Boyd , Peter De Schrijver , Mikko Perttunen , Peter Chen , Mark Brown , Lee Jones , =?UTF-8?Q?Uwe_Kleine-K=c3=b6nig?= , Nishanth Menon , Vignesh Raghavendra , Richard Weinberger , Miquel Raynal , Lucas Stach , Stefan Agner , Adrian Hunter , Mauro Carvalho Chehab , Rob Herring , Michael Turquette , linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org, linux-usb@vger.kernel.org, linux-staging@lists.linux.dev, linux-spi@vger.kernel.org, linux-pwm@vger.kernel.org, linux-mtd@lists.infradead.org, linux-mmc@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-clk@vger.kernel.org References: <20210817012754.8710-1-digetx@gmail.com> <20210817012754.8710-8-digetx@gmail.com> From: Dmitry Osipenko Message-ID: Date: Wed, 18 Aug 2021 18:05:21 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 18.08.2021 17:07, Thierry Reding пишет: > On Tue, Aug 17, 2021 at 04:27:27AM +0300, Dmitry Osipenko wrote: > [...] >> +struct clk *tegra_clk_register(struct clk_hw *hw) >> +{ >> + struct platform_device *pdev; >> + struct device *dev = NULL; >> + struct device_node *np; >> + const char *dev_name; >> + >> + np = tegra_clk_get_of_node(hw); >> + >> + if (!of_device_is_available(np)) >> + goto put_node; >> + >> + dev_name = kasprintf(GFP_KERNEL, "tegra_clk_%s", hw->init->name); >> + if (!dev_name) >> + goto put_node; >> + >> + pdev = of_platform_device_create(np, dev_name, NULL); >> + if (!pdev) { >> + pr_err("%s: failed to create device for %pOF\n", __func__, np); >> + kfree(dev_name); >> + goto put_node; >> + } >> + >> + dev = &pdev->dev; >> + pm_runtime_enable(dev); >> +put_node: >> + of_node_put(np); >> + >> + return clk_register(dev, hw); >> +} > > This looks wrong. Why do we need struct platform_device objects for each > of these clocks? That's going to be a massive amount of platform devices > and they will completely mess up sysfs. RPM works with a device. It's not a massive amount of devices, it's one device for T20 and four devices for T30.