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Thu, 07 Dec 2023 00:18:25 -0800 (PST) Received: from [192.168.1.20] ([178.197.218.27]) by smtp.gmail.com with ESMTPSA id o13-20020adfe80d000000b003333d46a9e8sm765592wrm.56.2023.12.07.00.18.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 07 Dec 2023 00:18:25 -0800 (PST) Message-ID: <1d58c2b9-4206-409c-b312-87f4fb649512@linaro.org> Date: Thu, 7 Dec 2023 09:18:20 +0100 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/2] media: i2c: Add GC08A3 image sensor driver Content-Language: en-US To: Zhi Mao , mchehab@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org Cc: shengnan.wang@mediatek.com, yaya.chang@mediatek.com, 10572168@qq.com, Project_Global_Chrome_Upstream_Group@mediatek.com, yunkec@chromium.org, conor+dt@kernel.org, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, jacopo.mondi@ideasonboard.com, sakari.ailus@linux.intel.com, hverkuil-cisco@xs4all.nl, heiko@sntech.de, jernej.skrabec@gmail.com, macromorgan@hotmail.com, linus.walleij@linaro.org, laurent.pinchart@ideasonboard.com, hdegoede@redhat.com, tomi.valkeinen@ideasonboard.com, gerald.loacker@wolfvision.net, andy.shevchenko@gmail.com, bingbu.cao@intel.com, dan.scally@ideasonboard.com, linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org References: <20231207052016.25954-1-zhi.mao@mediatek.com> <20231207052016.25954-2-zhi.mao@mediatek.com> From: Krzysztof Kozlowski Autocrypt: addr=krzysztof.kozlowski@linaro.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 07/12/2023 06:20, Zhi Mao wrote: > Add a V4L2 sub-device driver for Galaxycore GC08A3 image sensor. > > Reviewed-By: yunkec@chromium.org I don't see review given here: https://lore.kernel.org/linux-media/20231123115104.32094-1-zhi.mao@mediatek.com/ This does not look like real review. Where was it performed? How thorough was it? How many review iterations did it include? Why there is no name but anonymous review? > Signed-off-by: Zhi Mao > --- > drivers/media/i2c/Kconfig | 14 + > drivers/media/i2c/Makefile | 1 + > drivers/media/i2c/gc08a3.c | 1888 ++++++++++++++++++++++++++++++++++++ > 3 files changed, 1903 insertions(+) > create mode 100644 drivers/media/i2c/gc08a3.c > ... > +static inline struct gc08a3 *to_gc08a3(struct v4l2_subdev *sd) > +{ > + return container_of(sd, struct gc08a3, sd); > +} > + > +static int gc08a3_power_on(struct device *dev) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + struct v4l2_subdev *sd = i2c_get_clientdata(client); > + struct gc08a3 *gc08a3 = to_gc08a3(sd); > + int ret; > + > + gpiod_set_value_cansleep(gc08a3->enable_gpio, 0); Why do you put make enable GPIO low? That's not how enable GPIO is supposed to work... > + usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US); > + > + ret = regulator_bulk_enable(GC08A3_NUM_SUPPLIES, gc08a3->supplies); > + if (ret < 0) { > + dev_err(gc08a3->dev, "failed to enable regulators: %d\n", ret); > + return ret; > + } > + > + ret = clk_prepare_enable(gc08a3->xclk); > + if (ret < 0) { > + regulator_bulk_disable(GC08A3_NUM_SUPPLIES, gc08a3->supplies); > + dev_err(gc08a3->dev, "clk prepare enable failed\n"); > + return ret; > + } > + > + usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US); > + > + gpiod_set_value_cansleep(gc08a3->enable_gpio, 1); > + usleep_range(GC08A3_MIN_SLEEP_US, GC08A3_MAX_SLEEP_US); > + > + return 0; > +} > + > +static int gc08a3_power_off(struct device *dev) > +{ > + struct i2c_client *client = to_i2c_client(dev); > + struct v4l2_subdev *sd = i2c_get_clientdata(client); > + struct gc08a3 *gc08a3 = to_gc08a3(sd); > + > + gpiod_set_value_cansleep(gc08a3->enable_gpio, 0); How making enable GPIO low is related to power off? Enable means you turn on some feature, not shutdown. Look at common GPIO consumer bindings in the kernel. ... > +static int gc08a3_probe(struct i2c_client *client) > +{ > + struct device *dev = &client->dev; > + struct gc08a3 *gc08a3; > + int ret; > + > + ret = gc08a3_parse_fwnode(dev); > + if (ret) > + return ret; > + > + gc08a3 = devm_kzalloc(dev, sizeof(*gc08a3), GFP_KERNEL); > + if (!gc08a3) > + return -ENOMEM; > + > + gc08a3->dev = dev; > + > + gc08a3->xclk = devm_clk_get(dev, NULL); > + if (IS_ERR(gc08a3->xclk)) > + return dev_err_probe(dev, PTR_ERR(gc08a3->xclk), > + "failed to get xclk\n"); Misaligned indentation > + > + ret = clk_set_rate(gc08a3->xclk, GC08A3_DEFAULT_CLK_FREQ); > + if (ret) > + return dev_err_probe(dev, ret, > + "failed to set xclk frequency\n"); Misaligned indentation > + > + ret = gc08a3_get_regulators(dev, gc08a3); > + if (ret < 0) > + return dev_err_probe(dev, ret, > + "failed to get regulators\n"); Misaligned indentation > + > + gc08a3->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW); > + if (IS_ERR(gc08a3->enable_gpio)) > + return dev_err_probe(dev, PTR_ERR(gc08a3->enable_gpio), > + "failed to get gpio\n"); Misaligned indentation... probably entire code is misaligned. Best regards, Krzysztof