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Tue, 03 Jan 2023 13:13:49 -0800 (PST) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id s22-20020a0568080b1600b0035b439a4b81sm13513958oij.31.2023.01.03.13.13.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Jan 2023 13:13:49 -0800 (PST) Sender: Guenter Roeck Date: Tue, 3 Jan 2023 13:13:48 -0800 From: Guenter Roeck To: Christophe JAILLET Cc: Wim Van Sebroeck , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org Subject: Re: [PATCH] watchdog: meson_gxbb: Use devm_clk_get_enabled() helper Message-ID: <20230103211348.GB212337@roeck-us.net> References: <6c5948373d309408095c1a098b7b4c491c5265f7.1672490071.git.christophe.jaillet@wanadoo.fr> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6c5948373d309408095c1a098b7b4c491c5265f7.1672490071.git.christophe.jaillet@wanadoo.fr> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Dec 31, 2022 at 01:34:44PM +0100, Christophe JAILLET wrote: > The devm_clk_get_enabled() helper: > - calls devm_clk_get() > - calls clk_prepare_enable() and registers what is needed in order to > call clk_disable_unprepare() when needed, as a managed resource. > > This simplifies the code and avoids the need of a dedicated function used > with devm_add_action_or_reset(). > > Signed-off-by: Christophe JAILLET Reviewed-by: Guenter Roeck > --- > drivers/watchdog/meson_gxbb_wdt.c | 16 +--------------- > 1 file changed, 1 insertion(+), 15 deletions(-) > > diff --git a/drivers/watchdog/meson_gxbb_wdt.c b/drivers/watchdog/meson_gxbb_wdt.c > index 981a2f7c3bec..35d80cb39856 100644 > --- a/drivers/watchdog/meson_gxbb_wdt.c > +++ b/drivers/watchdog/meson_gxbb_wdt.c > @@ -146,16 +146,10 @@ static const struct of_device_id meson_gxbb_wdt_dt_ids[] = { > }; > MODULE_DEVICE_TABLE(of, meson_gxbb_wdt_dt_ids); > > -static void meson_clk_disable_unprepare(void *data) > -{ > - clk_disable_unprepare(data); > -} > - > static int meson_gxbb_wdt_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > struct meson_gxbb_wdt *data; > - int ret; > u32 ctrl_reg; > > data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); > @@ -166,18 +160,10 @@ static int meson_gxbb_wdt_probe(struct platform_device *pdev) > if (IS_ERR(data->reg_base)) > return PTR_ERR(data->reg_base); > > - data->clk = devm_clk_get(dev, NULL); > + data->clk = devm_clk_get_enabled(dev, NULL); > if (IS_ERR(data->clk)) > return PTR_ERR(data->clk); > > - ret = clk_prepare_enable(data->clk); > - if (ret) > - return ret; > - ret = devm_add_action_or_reset(dev, meson_clk_disable_unprepare, > - data->clk); > - if (ret) > - return ret; > - > platform_set_drvdata(pdev, data); > > data->wdt_dev.parent = dev; > -- > 2.34.1 >