* [PATCH] iio: light: tsl2563: pass iio device as i2c_client private data
@ 2020-05-22 7:08 Alexandru Ardelean
2020-05-24 14:39 ` Jonathan Cameron
0 siblings, 1 reply; 2+ messages in thread
From: Alexandru Ardelean @ 2020-05-22 7:08 UTC (permalink / raw)
To: linux-iio, linux-kernel; +Cc: jic23, amit.kucheria, Alexandru Ardelean
We may want to get rid of the iio_priv_to_dev() helper. That's a bit
uncertain at this point. The reason is that we will hide some of the
members of the iio_dev structure (to prevent drivers from accessing them
directly), and that will also mean hiding the implementation of the
iio_priv_to_dev() helper inside the IIO core.
Hiding the implementation of iio_priv_to_dev() implies that some fast-paths
may not be fast anymore, so a general idea is to try to get rid of the
iio_priv_to_dev() altogether.
For this driver, it implies passing the IIO device on the i2c client
private data. The implementation of iio_priv() will not be affected by the
rework/hiding of iio_priv_to_dev().
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
---
drivers/iio/light/tsl2563.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/iio/light/tsl2563.c b/drivers/iio/light/tsl2563.c
index 27a5c28aac7f..2987a7a79a97 100644
--- a/drivers/iio/light/tsl2563.c
+++ b/drivers/iio/light/tsl2563.c
@@ -713,7 +713,7 @@ static int tsl2563_probe(struct i2c_client *client,
chip = iio_priv(indio_dev);
- i2c_set_clientdata(client, chip);
+ i2c_set_clientdata(client, indio_dev);
chip->client = client;
err = tsl2563_detect(chip);
@@ -797,8 +797,8 @@ static int tsl2563_probe(struct i2c_client *client,
static int tsl2563_remove(struct i2c_client *client)
{
- struct tsl2563_chip *chip = i2c_get_clientdata(client);
- struct iio_dev *indio_dev = iio_priv_to_dev(chip);
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct tsl2563_chip *chip = iio_priv(indio_dev);
iio_device_unregister(indio_dev);
if (!chip->int_enabled)
@@ -816,7 +816,8 @@ static int tsl2563_remove(struct i2c_client *client)
#ifdef CONFIG_PM_SLEEP
static int tsl2563_suspend(struct device *dev)
{
- struct tsl2563_chip *chip = i2c_get_clientdata(to_i2c_client(dev));
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct tsl2563_chip *chip = iio_priv(indio_dev);
int ret;
mutex_lock(&chip->lock);
@@ -834,7 +835,8 @@ static int tsl2563_suspend(struct device *dev)
static int tsl2563_resume(struct device *dev)
{
- struct tsl2563_chip *chip = i2c_get_clientdata(to_i2c_client(dev));
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct tsl2563_chip *chip = iio_priv(indio_dev);
int ret;
mutex_lock(&chip->lock);
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] iio: light: tsl2563: pass iio device as i2c_client private data
2020-05-22 7:08 [PATCH] iio: light: tsl2563: pass iio device as i2c_client private data Alexandru Ardelean
@ 2020-05-24 14:39 ` Jonathan Cameron
0 siblings, 0 replies; 2+ messages in thread
From: Jonathan Cameron @ 2020-05-24 14:39 UTC (permalink / raw)
To: Alexandru Ardelean; +Cc: linux-iio, linux-kernel, amit.kucheria
On Fri, 22 May 2020 10:08:01 +0300
Alexandru Ardelean <alexandru.ardelean@analog.com> wrote:
> We may want to get rid of the iio_priv_to_dev() helper. That's a bit
> uncertain at this point. The reason is that we will hide some of the
> members of the iio_dev structure (to prevent drivers from accessing them
> directly), and that will also mean hiding the implementation of the
> iio_priv_to_dev() helper inside the IIO core.
>
> Hiding the implementation of iio_priv_to_dev() implies that some fast-paths
> may not be fast anymore, so a general idea is to try to get rid of the
> iio_priv_to_dev() altogether.
>
> For this driver, it implies passing the IIO device on the i2c client
> private data. The implementation of iio_priv() will not be affected by the
> rework/hiding of iio_priv_to_dev().
>
> Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Applied. Thanks,
J
> ---
> drivers/iio/light/tsl2563.c | 12 +++++++-----
> 1 file changed, 7 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/iio/light/tsl2563.c b/drivers/iio/light/tsl2563.c
> index 27a5c28aac7f..2987a7a79a97 100644
> --- a/drivers/iio/light/tsl2563.c
> +++ b/drivers/iio/light/tsl2563.c
> @@ -713,7 +713,7 @@ static int tsl2563_probe(struct i2c_client *client,
>
> chip = iio_priv(indio_dev);
>
> - i2c_set_clientdata(client, chip);
> + i2c_set_clientdata(client, indio_dev);
> chip->client = client;
>
> err = tsl2563_detect(chip);
> @@ -797,8 +797,8 @@ static int tsl2563_probe(struct i2c_client *client,
>
> static int tsl2563_remove(struct i2c_client *client)
> {
> - struct tsl2563_chip *chip = i2c_get_clientdata(client);
> - struct iio_dev *indio_dev = iio_priv_to_dev(chip);
> + struct iio_dev *indio_dev = i2c_get_clientdata(client);
> + struct tsl2563_chip *chip = iio_priv(indio_dev);
>
> iio_device_unregister(indio_dev);
> if (!chip->int_enabled)
> @@ -816,7 +816,8 @@ static int tsl2563_remove(struct i2c_client *client)
> #ifdef CONFIG_PM_SLEEP
> static int tsl2563_suspend(struct device *dev)
> {
> - struct tsl2563_chip *chip = i2c_get_clientdata(to_i2c_client(dev));
> + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
> + struct tsl2563_chip *chip = iio_priv(indio_dev);
> int ret;
>
> mutex_lock(&chip->lock);
> @@ -834,7 +835,8 @@ static int tsl2563_suspend(struct device *dev)
>
> static int tsl2563_resume(struct device *dev)
> {
> - struct tsl2563_chip *chip = i2c_get_clientdata(to_i2c_client(dev));
> + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
> + struct tsl2563_chip *chip = iio_priv(indio_dev);
> int ret;
>
> mutex_lock(&chip->lock);
^ permalink raw reply [flat|nested] 2+ messages in thread
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2020-05-24 14:39 ` Jonathan Cameron
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