lkml.org 
[lkml]   [2021]   [Feb]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 02/16] media: i2c: rdacm20: Embedded 'serializer' field
Hi Jacopo,

Thank you for the patch.

On Tue, Feb 16, 2021 at 06:41:32PM +0100, Jacopo Mondi wrote:
> There's no reason to allocate dynamically the 'serializer' field in
> the driver structure.
>
> Embed the field and adjust all its users in the driver.
>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>

This requires making the max9271_device structure definition available
to the rdacm20 and other drivers. Given how tightly coupled they are, I
don't think that's an issue, but let's keep in mind in the future that
the camera drivers should not, as a general rule, peek into the
max9271_device structure directly. It may be nice to add a
max9271_init() function that will initialize the client field, and move
the client->addr assignment to max9271_set_address().

Maybe you've already done so in the rest of the series, I'll find out
soon :-) For this patch,

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
> drivers/media/i2c/rdacm20.c | 38 ++++++++++++++++---------------------
> 1 file changed, 16 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/media/i2c/rdacm20.c b/drivers/media/i2c/rdacm20.c
> index f7fd5ae955d0..4d9bac87cba8 100644
> --- a/drivers/media/i2c/rdacm20.c
> +++ b/drivers/media/i2c/rdacm20.c
> @@ -312,7 +312,7 @@ static const struct ov10635_reg {
>
> struct rdacm20_device {
> struct device *dev;
> - struct max9271_device *serializer;
> + struct max9271_device serializer;
> struct i2c_client *sensor;
> struct v4l2_subdev sd;
> struct media_pad pad;
> @@ -399,7 +399,7 @@ static int rdacm20_s_stream(struct v4l2_subdev *sd, int enable)
> {
> struct rdacm20_device *dev = sd_to_rdacm20(sd);
>
> - return max9271_set_serial_link(dev->serializer, enable);
> + return max9271_set_serial_link(&dev->serializer, enable);
> }
>
> static int rdacm20_enum_mbus_code(struct v4l2_subdev *sd,
> @@ -456,11 +456,11 @@ static int rdacm20_initialize(struct rdacm20_device *dev)
> int ret;
>
> /* Verify communication with the MAX9271: ping to wakeup. */
> - dev->serializer->client->addr = MAX9271_DEFAULT_ADDR;
> - i2c_smbus_read_byte(dev->serializer->client);
> + dev->serializer.client->addr = MAX9271_DEFAULT_ADDR;
> + i2c_smbus_read_byte(dev->serializer.client);
>
> /* Serial link disabled during config as it needs a valid pixel clock. */
> - ret = max9271_set_serial_link(dev->serializer, false);
> + ret = max9271_set_serial_link(&dev->serializer, false);
> if (ret)
> return ret;
>
> @@ -468,35 +468,35 @@ static int rdacm20_initialize(struct rdacm20_device *dev)
> * Ensure that we have a good link configuration before attempting to
> * identify the device.
> */
> - max9271_configure_i2c(dev->serializer, MAX9271_I2CSLVSH_469NS_234NS |
> - MAX9271_I2CSLVTO_1024US |
> - MAX9271_I2CMSTBT_105KBPS);
> + max9271_configure_i2c(&dev->serializer, MAX9271_I2CSLVSH_469NS_234NS |
> + MAX9271_I2CSLVTO_1024US |
> + MAX9271_I2CMSTBT_105KBPS);
>
> - max9271_configure_gmsl_link(dev->serializer);
> + max9271_configure_gmsl_link(&dev->serializer);
>
> - ret = max9271_verify_id(dev->serializer);
> + ret = max9271_verify_id(&dev->serializer);
> if (ret < 0)
> return ret;
>
> - ret = max9271_set_address(dev->serializer, dev->addrs[0]);
> + ret = max9271_set_address(&dev->serializer, dev->addrs[0]);
> if (ret < 0)
> return ret;
> - dev->serializer->client->addr = dev->addrs[0];
> + dev->serializer.client->addr = dev->addrs[0];
>
> /*
> * Reset the sensor by cycling the OV10635 reset signal connected to the
> * MAX9271 GPIO1 and verify communication with the OV10635.
> */
> - ret = max9271_enable_gpios(dev->serializer, MAX9271_GPIO1OUT);
> + ret = max9271_enable_gpios(&dev->serializer, MAX9271_GPIO1OUT);
> if (ret)
> return ret;
>
> - ret = max9271_clear_gpios(dev->serializer, MAX9271_GPIO1OUT);
> + ret = max9271_clear_gpios(&dev->serializer, MAX9271_GPIO1OUT);
> if (ret)
> return ret;
> usleep_range(10000, 15000);
>
> - ret = max9271_set_gpios(dev->serializer, MAX9271_GPIO1OUT);
> + ret = max9271_set_gpios(&dev->serializer, MAX9271_GPIO1OUT);
> if (ret)
> return ret;
> usleep_range(10000, 15000);
> @@ -560,13 +560,7 @@ static int rdacm20_probe(struct i2c_client *client)
> if (!dev)
> return -ENOMEM;
> dev->dev = &client->dev;
> -
> - dev->serializer = devm_kzalloc(&client->dev, sizeof(*dev->serializer),
> - GFP_KERNEL);
> - if (!dev->serializer)
> - return -ENOMEM;
> -
> - dev->serializer->client = client;
> + dev->serializer.client = client;
>
> ret = of_property_read_u32_array(client->dev.of_node, "reg",
> dev->addrs, 2);

--
Regards,

Laurent Pinchart

\
 
 \ /
  Last update: 2021-02-22 02:00    [W:0.293 / U:0.588 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site