Re: [PATCH V11 2/2] media: i2c: ov02a10: Add OV02A10 image sensor driver

From: Sakari Ailus <sakari.ailus@linux.intel.com>
To: Dongchun Zhu <dongchun.zhu@mediatek.com>
Cc: linus.walleij@linaro.org, bgolaszewski@baylibre.com,
	mchehab@kernel.org, andriy.shevchenko@linux.intel.com,
	robh+dt@kernel.org, mark.rutland@arm.com, drinkcat@chromium.org,
	tfiga@chromium.org, matthias.bgg@gmail.com, bingbu.cao@intel.com,
	srv_heupstream@mediatek.com, linux-mediatek@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org, sj.huang@mediatek.com,
	linux-media@vger.kernel.org, devicetree@vger.kernel.org,
	louis.kuo@mediatek.com, shengnan.wang@mediatek.com
Subject: Re: [PATCH V11 2/2] media: i2c: ov02a10: Add OV02A10 image sensor driver
Date: Tue, 30 Jun 2020 12:54:30 +0300	[thread overview]
Message-ID: <20200630095430.GF16711@paasikivi.fi.intel.com> (raw)
In-Reply-To: <20200630024942.20891-3-dongchun.zhu@mediatek.com>

Hi Dongchun,

Thanks for the update.

On Tue, Jun 30, 2020 at 10:49:42AM +0800, Dongchun Zhu wrote:
> Add a V4L2 sub-device driver for OV02A10 image sensor.
> 
> Signed-off-by: Dongchun Zhu <dongchun.zhu@mediatek.com>
> ---
>  MAINTAINERS                 |    1 +
>  drivers/media/i2c/Kconfig   |   13 +
>  drivers/media/i2c/Makefile  |    1 +
>  drivers/media/i2c/ov02a10.c | 1052 +++++++++++++++++++++++++++++++++++++++++++
>  4 files changed, 1067 insertions(+)
>  create mode 100644 drivers/media/i2c/ov02a10.c
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 378c961..a6a2f8b 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -12566,6 +12566,7 @@ L:	linux-media@vger.kernel.org
>  S:	Maintained
>  T:	git git://linuxtv.org/media_tree.git
>  F:	Documentation/devicetree/bindings/media/i2c/ovti,ov02a10.yaml
> +F:	drivers/media/i2c/ov02a10.c
>  
>  OMNIVISION OV13858 SENSOR DRIVER
>  M:	Sakari Ailus <sakari.ailus@linux.intel.com>
> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> index da11036..65519cf 100644
> --- a/drivers/media/i2c/Kconfig
> +++ b/drivers/media/i2c/Kconfig
> @@ -812,6 +812,19 @@ config VIDEO_IMX355
>  	  To compile this driver as a module, choose M here: the
>  	  module will be called imx355.
>  
> +config VIDEO_OV02A10
> +	tristate "OmniVision OV02A10 sensor support"
> +	depends on I2C && VIDEO_V4L2
> +	select MEDIA_CONTROLLER
> +	select VIDEO_V4L2_SUBDEV_API
> +	select V4L2_FWNODE
> +	help
> +	  This is a Video4Linux2 sensor driver for the OmniVision
> +	  OV02A10 camera.
> +
> +	  To compile this driver as a module, choose M here: the
> +	  module will be called ov02a10.
> +
>  config VIDEO_OV2640
>  	tristate "OmniVision OV2640 sensor support"
>  	depends on VIDEO_V4L2 && I2C
> diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
> index 993acab..384e676 100644
> --- a/drivers/media/i2c/Makefile
> +++ b/drivers/media/i2c/Makefile
> @@ -63,6 +63,7 @@ obj-$(CONFIG_VIDEO_VP27SMPX) += vp27smpx.o
>  obj-$(CONFIG_VIDEO_SONY_BTF_MPX) += sony-btf-mpx.o
>  obj-$(CONFIG_VIDEO_UPD64031A) += upd64031a.o
>  obj-$(CONFIG_VIDEO_UPD64083) += upd64083.o
> +obj-$(CONFIG_VIDEO_OV02A10) += ov02a10.o
>  obj-$(CONFIG_VIDEO_OV2640) += ov2640.o
>  obj-$(CONFIG_VIDEO_OV2680) += ov2680.o
>  obj-$(CONFIG_VIDEO_OV2685) += ov2685.o
> diff --git a/drivers/media/i2c/ov02a10.c b/drivers/media/i2c/ov02a10.c
> new file mode 100644
> index 0000000..f7fd329
> --- /dev/null
> +++ b/drivers/media/i2c/ov02a10.c

...

> +	ov02a10->rst_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);

Shouldn't this be GPIOD_OUT_HIGH? That's the state it'll be after powering
the sensor off the first time. Alternatively make reset signal high in
runtime suspend callback.

-- 
Kind regards,

Sakari Ailus