On 21, April 2018 18:58, Jonathan Cameron wrote:
> On Fri, 20 Apr 2018 21:30:44 +0200
> David Veenstra <davidjulianveenstra@xxxxxxxxx> wrote:
>
>> The legacy, integer based gpio API is replaced with the descriptor
>> based API.
>>
>> For compatibility, it is first tried to use the platform data to
>> request the gpio's. Otherwise, it looks for the "sample" and "rdvel"
>> gpio function.
>>
>> Signed-off-by: David Veenstra <davidjulianveenstra@xxxxxxxxx>
> I would suggest that we simply force any out of tree users of the
> platform data to update the platform data. Drop the the old
> versions entirely..
>
> We can be mean to out of tree board files so let us make our own
> lives easy.
Alright, I'll remove usage of platform data for v3.
Best regards,
David Veenstra
>
> Jonathan
>
>> ---
>> drivers/staging/iio/resolver/ad2s1200.c | 51 ++++++++++++++++++++++++---------
>> 1 file changed, 37 insertions(+), 14 deletions(-)
>>
>> diff --git a/drivers/staging/iio/resolver/ad2s1200.c b/drivers/staging/iio/resolver/ad2s1200.c
>> index 11ed9c7332e6..29a9bb666e7b 100644
>> --- a/drivers/staging/iio/resolver/ad2s1200.c
>> +++ b/drivers/staging/iio/resolver/ad2s1200.c
>> @@ -14,6 +14,7 @@
>> #include <linux/delay.h>
>> #include <linux/device.h>
>> #include <linux/gpio.h>
>> +#include <linux/gpio/consumer.h>
>> #include <linux/module.h>
>> #include <linux/mutex.h>
>> #include <linux/spi/spi.h>
>> @@ -44,8 +45,8 @@
>> struct ad2s1200_state {
>> struct mutex lock;
>> struct spi_device *sdev;
>> - int sample;
>> - int rdvel;
>> + struct gpio_desc *sample;
>> + struct gpio_desc *rdvel;
>> u8 rx[2] ____cacheline_aligned;
>> };
>>
>> @@ -60,12 +61,12 @@ static int ad2s1200_read_raw(struct iio_dev *indio_dev,
>> u16 vel;
>>
>> mutex_lock(&st->lock);
>> - gpio_set_value(st->sample, 0);
>> + gpiod_set_value(st->sample, 0);
>>
>> /* delay (6 * AD2S1200_TSCLK + 20) nano seconds */
>> udelay(1);
>> - gpio_set_value(st->sample, 1);
>> - gpio_set_value(st->rdvel, !!(chan->type == IIO_ANGL));
>> + gpiod_set_value(st->sample, 1);
>> + gpiod_set_value(st->rdvel, !!(chan->type == IIO_ANGL));
>>
>> ret = spi_read(st->sdev, st->rx, 2);
>> if (ret < 0) {
>> @@ -121,13 +122,18 @@ static int ad2s1200_probe(struct spi_device *spi)
>>
>> dev = &spi->dev;
>>
>> - for (pn = 0; pn < AD2S1200_PN; pn++) {
>> - ret = devm_gpio_request_one(dev, pins[pn], GPIOF_DIR_OUT,
>> - DRV_NAME);
>> - if (ret) {
>> - dev_err(dev, "request gpio pin %d failed\n",
>> - pins[pn]);
>> - return ret;
>> + if (pins) {
>> + for (pn = 0; pn < AD2S1200_PN; pn++) {
>> + ret = devm_gpio_request_one(dev, pins[pn],
>> + GPIOF_DIR_OUT,
>> + DRV_NAME);
>> + if (ret) {
>> + dev_err(dev,
>> + "Failed to claim gpio %d\n: err=%d",
>> + pins[pn],
>> + ret);
>> + return ret;
>> + }
>> }
>> }
>>
>> @@ -139,8 +145,25 @@ static int ad2s1200_probe(struct spi_device *spi)
>> st = iio_priv(indio_dev);
>> mutex_init(&st->lock);
>> st->sdev = spi;
>> - st->sample = pins[0];
>> - st->rdvel = pins[1];
>> +
>> + if (pins) {
>> + st->sample = gpio_to_desc(pins[0]);
>> + st->rdvel = gpio_to_desc(pins[1]);
>> + } else {
>> + st->sample = devm_gpiod_get(dev, "sample", GPIOD_OUT_LOW);
>> + if (IS_ERR(st->sample)) {
>> + dev_err(dev, "Failed to claim SAMPLE gpio: err=%ld\n",
>> + PTR_ERR(st->sample));
>> + return PTR_ERR(st->sample);
>> + }
>> +
>> + st->rdvel = devm_gpiod_get(dev, "rdvel", GPIOD_OUT_LOW);
>> + if (IS_ERR(st->rdvel)) {
>> + dev_err(dev, "Failed to claim RDVEL gpio: err=%ld\n",
>> + PTR_ERR(st->rdvel));
>> + return PTR_ERR(st->rdvel);
>> + }
>> + }
>>
>> indio_dev->dev.parent = dev;
>> indio_dev->info = &ad2s1200_info;
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