* [PATCH] iio: light: tcs3414: use iio helper function to guarantee direct mode
@ 2016-06-07 5:09 Alison Schofield
2016-06-07 5:23 ` Peter Meerwald-Stadler
0 siblings, 1 reply; 4+ messages in thread
From: Alison Schofield @ 2016-06-07 5:09 UTC (permalink / raw)
To: jic23; +Cc: pmeerw, knaack.h, lars, linux-iio, linux-kernel
Replace the code that guarantees the device stays in direct mode
with iio_device_claim_direct_mode() which does same. This allows
removal of an unused lock in the device private global data.
Signed-off-by: Alison Schofield <amsfield22@gmail.com>
Cc: Daniel Baluta <daniel.baluta@gmail.com>
---
drivers/iio/light/tcs3414.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/drivers/iio/light/tcs3414.c b/drivers/iio/light/tcs3414.c
index f90f8c5..8a15fb5 100644
--- a/drivers/iio/light/tcs3414.c
+++ b/drivers/iio/light/tcs3414.c
@@ -53,7 +53,6 @@
struct tcs3414_data {
struct i2c_client *client;
- struct mutex lock;
u8 control;
u8 gain;
u8 timing;
@@ -134,16 +133,16 @@ static int tcs3414_read_raw(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_RAW:
- if (iio_buffer_enabled(indio_dev))
- return -EBUSY;
- mutex_lock(&data->lock);
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
ret = tcs3414_req_data(data);
if (ret < 0) {
- mutex_unlock(&data->lock);
+ iio_device_release_direct_mode(indio_dev);
return ret;
}
ret = i2c_smbus_read_word_data(data->client, chan->address);
- mutex_unlock(&data->lock);
+ iio_device_release_direct_mode(indio_dev);
if (ret < 0)
return ret;
*val = ret;
@@ -288,7 +287,6 @@ static int tcs3414_probe(struct i2c_client *client,
data = iio_priv(indio_dev);
i2c_set_clientdata(client, indio_dev);
data->client = client;
- mutex_init(&data->lock);
indio_dev->dev.parent = &client->dev;
indio_dev->info = &tcs3414_info;
--
2.1.4
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] iio: light: tcs3414: use iio helper function to guarantee direct mode
2016-06-07 5:09 [PATCH] iio: light: tcs3414: use iio helper function to guarantee direct mode Alison Schofield
@ 2016-06-07 5:23 ` Peter Meerwald-Stadler
2016-06-11 15:56 ` Jonathan Cameron
0 siblings, 1 reply; 4+ messages in thread
From: Peter Meerwald-Stadler @ 2016-06-07 5:23 UTC (permalink / raw)
To: Alison Schofield; +Cc: jic23, knaack.h, lars, linux-iio, linux-kernel
> Replace the code that guarantees the device stays in direct mode
> with iio_device_claim_direct_mode() which does same. This allows
> removal of an unused lock in the device private global data.
Acked-by: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
> Signed-off-by: Alison Schofield <amsfield22@gmail.com>
> Cc: Daniel Baluta <daniel.baluta@gmail.com>
> ---
> drivers/iio/light/tcs3414.c | 12 +++++-------
> 1 file changed, 5 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/iio/light/tcs3414.c b/drivers/iio/light/tcs3414.c
> index f90f8c5..8a15fb5 100644
> --- a/drivers/iio/light/tcs3414.c
> +++ b/drivers/iio/light/tcs3414.c
> @@ -53,7 +53,6 @@
>
> struct tcs3414_data {
> struct i2c_client *client;
> - struct mutex lock;
> u8 control;
> u8 gain;
> u8 timing;
> @@ -134,16 +133,16 @@ static int tcs3414_read_raw(struct iio_dev *indio_dev,
>
> switch (mask) {
> case IIO_CHAN_INFO_RAW:
> - if (iio_buffer_enabled(indio_dev))
> - return -EBUSY;
> - mutex_lock(&data->lock);
> + ret = iio_device_claim_direct_mode(indio_dev);
> + if (ret)
> + return ret;
> ret = tcs3414_req_data(data);
> if (ret < 0) {
> - mutex_unlock(&data->lock);
> + iio_device_release_direct_mode(indio_dev);
> return ret;
> }
> ret = i2c_smbus_read_word_data(data->client, chan->address);
> - mutex_unlock(&data->lock);
> + iio_device_release_direct_mode(indio_dev);
> if (ret < 0)
> return ret;
> *val = ret;
> @@ -288,7 +287,6 @@ static int tcs3414_probe(struct i2c_client *client,
> data = iio_priv(indio_dev);
> i2c_set_clientdata(client, indio_dev);
> data->client = client;
> - mutex_init(&data->lock);
>
> indio_dev->dev.parent = &client->dev;
> indio_dev->info = &tcs3414_info;
>
--
Peter Meerwald-Stadler
+43-664-2444418 (mobile)
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] iio: light: tcs3414: use iio helper function to guarantee direct mode
2016-06-07 5:23 ` Peter Meerwald-Stadler
@ 2016-06-11 15:56 ` Jonathan Cameron
2016-06-11 16:07 ` Jonathan Cameron
0 siblings, 1 reply; 4+ messages in thread
From: Jonathan Cameron @ 2016-06-11 15:56 UTC (permalink / raw)
To: Peter Meerwald-Stadler, Alison Schofield
Cc: knaack.h, lars, linux-iio, linux-kernel
On 07/06/16 06:23, Peter Meerwald-Stadler wrote:
>
>> Replace the code that guarantees the device stays in direct mode
>> with iio_device_claim_direct_mode() which does same. This allows
>> removal of an unused lock in the device private global data.
>
> Acked-by: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Applied, thanks.
Joanthan
>
>> Signed-off-by: Alison Schofield <amsfield22@gmail.com>
>> Cc: Daniel Baluta <daniel.baluta@gmail.com>
>> ---
>> drivers/iio/light/tcs3414.c | 12 +++++-------
>> 1 file changed, 5 insertions(+), 7 deletions(-)
>>
>> diff --git a/drivers/iio/light/tcs3414.c b/drivers/iio/light/tcs3414.c
>> index f90f8c5..8a15fb5 100644
>> --- a/drivers/iio/light/tcs3414.c
>> +++ b/drivers/iio/light/tcs3414.c
>> @@ -53,7 +53,6 @@
>>
>> struct tcs3414_data {
>> struct i2c_client *client;
>> - struct mutex lock;
>> u8 control;
>> u8 gain;
>> u8 timing;
>> @@ -134,16 +133,16 @@ static int tcs3414_read_raw(struct iio_dev *indio_dev,
>>
>> switch (mask) {
>> case IIO_CHAN_INFO_RAW:
>> - if (iio_buffer_enabled(indio_dev))
>> - return -EBUSY;
>> - mutex_lock(&data->lock);
>> + ret = iio_device_claim_direct_mode(indio_dev);
>> + if (ret)
>> + return ret;
>> ret = tcs3414_req_data(data);
>> if (ret < 0) {
>> - mutex_unlock(&data->lock);
>> + iio_device_release_direct_mode(indio_dev);
>> return ret;
>> }
>> ret = i2c_smbus_read_word_data(data->client, chan->address);
>> - mutex_unlock(&data->lock);
>> + iio_device_release_direct_mode(indio_dev);
>> if (ret < 0)
>> return ret;
>> *val = ret;
>> @@ -288,7 +287,6 @@ static int tcs3414_probe(struct i2c_client *client,
>> data = iio_priv(indio_dev);
>> i2c_set_clientdata(client, indio_dev);
>> data->client = client;
>> - mutex_init(&data->lock);
>>
>> indio_dev->dev.parent = &client->dev;
>> indio_dev->info = &tcs3414_info;
>>
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] iio: light: tcs3414: use iio helper function to guarantee direct mode
2016-06-11 15:56 ` Jonathan Cameron
@ 2016-06-11 16:07 ` Jonathan Cameron
0 siblings, 0 replies; 4+ messages in thread
From: Jonathan Cameron @ 2016-06-11 16:07 UTC (permalink / raw)
To: Peter Meerwald-Stadler, Alison Schofield
Cc: knaack.h, lars, linux-iio, linux-kernel
On 11/06/16 16:56, Jonathan Cameron wrote:
> On 07/06/16 06:23, Peter Meerwald-Stadler wrote:
>>
>>> Replace the code that guarantees the device stays in direct mode
>>> with iio_device_claim_direct_mode() which does same. This allows
>>> removal of an unused lock in the device private global data.
>>
>> Acked-by: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
> Applied, thanks.
Backed out - see the tcs3472 comment. This lock isn't there to
protect against mode changes...
>
> Joanthan
>>
>>> Signed-off-by: Alison Schofield <amsfield22@gmail.com>
>>> Cc: Daniel Baluta <daniel.baluta@gmail.com>
>>> ---
>>> drivers/iio/light/tcs3414.c | 12 +++++-------
>>> 1 file changed, 5 insertions(+), 7 deletions(-)
>>>
>>> diff --git a/drivers/iio/light/tcs3414.c b/drivers/iio/light/tcs3414.c
>>> index f90f8c5..8a15fb5 100644
>>> --- a/drivers/iio/light/tcs3414.c
>>> +++ b/drivers/iio/light/tcs3414.c
>>> @@ -53,7 +53,6 @@
>>>
>>> struct tcs3414_data {
>>> struct i2c_client *client;
>>> - struct mutex lock;
>>> u8 control;
>>> u8 gain;
>>> u8 timing;
>>> @@ -134,16 +133,16 @@ static int tcs3414_read_raw(struct iio_dev *indio_dev,
>>>
>>> switch (mask) {
>>> case IIO_CHAN_INFO_RAW:
>>> - if (iio_buffer_enabled(indio_dev))
>>> - return -EBUSY;
>>> - mutex_lock(&data->lock);
>>> + ret = iio_device_claim_direct_mode(indio_dev);
>>> + if (ret)
>>> + return ret;
>>> ret = tcs3414_req_data(data);
>>> if (ret < 0) {
>>> - mutex_unlock(&data->lock);
>>> + iio_device_release_direct_mode(indio_dev);
>>> return ret;
>>> }
>>> ret = i2c_smbus_read_word_data(data->client, chan->address);
>>> - mutex_unlock(&data->lock);
>>> + iio_device_release_direct_mode(indio_dev);
>>> if (ret < 0)
>>> return ret;
>>> *val = ret;
>>> @@ -288,7 +287,6 @@ static int tcs3414_probe(struct i2c_client *client,
>>> data = iio_priv(indio_dev);
>>> i2c_set_clientdata(client, indio_dev);
>>> data->client = client;
>>> - mutex_init(&data->lock);
>>>
>>> indio_dev->dev.parent = &client->dev;
>>> indio_dev->info = &tcs3414_info;
>>>
>>
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-iio" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2016-06-11 16:07 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-06-07 5:09 [PATCH] iio: light: tcs3414: use iio helper function to guarantee direct mode Alison Schofield
2016-06-07 5:23 ` Peter Meerwald-Stadler
2016-06-11 15:56 ` Jonathan Cameron
2016-06-11 16:07 ` Jonathan Cameron
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).