158 lines
4.3 KiB
Diff
158 lines
4.3 KiB
Diff
Backport essential fixes from 3.15
|
|
|
|
From Linux 3.10 on this driver required platform data to load, which makes it
|
|
unusable in OpenWRT. This commit backports the following fixes:
|
|
* Move to regulator framework for scaling
|
|
* Set endianness of the ADC to Big endian
|
|
* Fix device-removal path
|
|
This commit should not be moved to newer kernel versions!
|
|
|
|
Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
|
|
---
|
|
--- a/drivers/staging/iio/adc/ad799x_core.c
|
|
+++ b/drivers/staging/iio/adc/ad799x_core.c
|
|
@@ -163,7 +163,6 @@ static int ad799x_read_raw(struct iio_de
|
|
{
|
|
int ret;
|
|
struct ad799x_state *st = iio_priv(indio_dev);
|
|
- unsigned int scale_uv;
|
|
|
|
switch (m) {
|
|
case IIO_CHAN_INFO_RAW:
|
|
@@ -180,10 +179,12 @@ static int ad799x_read_raw(struct iio_de
|
|
RES_MASK(chan->scan_type.realbits);
|
|
return IIO_VAL_INT;
|
|
case IIO_CHAN_INFO_SCALE:
|
|
- scale_uv = (st->int_vref_mv * 1000) >> chan->scan_type.realbits;
|
|
- *val = scale_uv / 1000;
|
|
- *val2 = (scale_uv % 1000) * 1000;
|
|
- return IIO_VAL_INT_PLUS_MICRO;
|
|
+ ret = regulator_get_voltage(st->vref);
|
|
+ if (ret < 0)
|
|
+ return ret;
|
|
+ *val = ret / 1000;
|
|
+ *val2 = chan->scan_type.realbits;
|
|
+ return IIO_VAL_FRACTIONAL_LOG2;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
@@ -474,7 +475,13 @@ static const struct iio_info ad7993_4_7_
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
|
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
|
|
.scan_index = (_index), \
|
|
- .scan_type = IIO_ST('u', _realbits, 16, 12 - (_realbits)), \
|
|
+ .scan_type = { \
|
|
+ .sign = 'u', \
|
|
+ .realbits = (_realbits), \
|
|
+ .storagebits = 16, \
|
|
+ .shift = 12 - (_realbits), \
|
|
+ .endianness = IIO_BE, \
|
|
+ }, \
|
|
.event_mask = (_evmask), \
|
|
}
|
|
|
|
@@ -584,7 +591,6 @@ static int ad799x_probe(struct i2c_clien
|
|
const struct i2c_device_id *id)
|
|
{
|
|
int ret;
|
|
- struct ad799x_platform_data *pdata = client->dev.platform_data;
|
|
struct ad799x_state *st;
|
|
struct iio_dev *indio_dev = iio_device_alloc(sizeof(*st));
|
|
|
|
@@ -601,17 +607,21 @@ static int ad799x_probe(struct i2c_clien
|
|
|
|
/* TODO: Add pdata options for filtering and bit delay */
|
|
|
|
- if (!pdata)
|
|
- return -EINVAL;
|
|
-
|
|
- st->int_vref_mv = pdata->vref_mv;
|
|
-
|
|
- st->reg = regulator_get(&client->dev, "vcc");
|
|
- if (!IS_ERR(st->reg)) {
|
|
- ret = regulator_enable(st->reg);
|
|
- if (ret)
|
|
- goto error_put_reg;
|
|
+ st->reg = devm_regulator_get(&client->dev, "vcc");
|
|
+ if (IS_ERR(st->reg))
|
|
+ return PTR_ERR(st->reg);
|
|
+ ret = regulator_enable(st->reg);
|
|
+ if (ret)
|
|
+ return ret;
|
|
+ st->vref = devm_regulator_get(&client->dev, "vref");
|
|
+ if (IS_ERR(st->vref)) {
|
|
+ ret = PTR_ERR(st->vref);
|
|
+ goto error_disable_reg;
|
|
}
|
|
+ ret = regulator_enable(st->vref);
|
|
+ if (ret)
|
|
+ goto error_disable_reg;
|
|
+
|
|
st->client = client;
|
|
|
|
indio_dev->dev.parent = &client->dev;
|
|
@@ -624,7 +634,7 @@ static int ad799x_probe(struct i2c_clien
|
|
|
|
ret = ad799x_register_ring_funcs_and_init(indio_dev);
|
|
if (ret)
|
|
- goto error_disable_reg;
|
|
+ goto error_disable_vref;
|
|
|
|
if (client->irq > 0) {
|
|
ret = request_threaded_irq(client->irq,
|
|
@@ -648,12 +658,10 @@ error_free_irq:
|
|
free_irq(client->irq, indio_dev);
|
|
error_cleanup_ring:
|
|
ad799x_ring_cleanup(indio_dev);
|
|
+error_disable_vref:
|
|
+ regulator_disable(st->vref);
|
|
error_disable_reg:
|
|
- if (!IS_ERR(st->reg))
|
|
- regulator_disable(st->reg);
|
|
-error_put_reg:
|
|
- if (!IS_ERR(st->reg))
|
|
- regulator_put(st->reg);
|
|
+ regulator_disable(st->reg);
|
|
iio_device_free(indio_dev);
|
|
|
|
return ret;
|
|
@@ -669,10 +677,8 @@ static int ad799x_remove(struct i2c_clie
|
|
free_irq(client->irq, indio_dev);
|
|
|
|
ad799x_ring_cleanup(indio_dev);
|
|
- if (!IS_ERR(st->reg)) {
|
|
- regulator_disable(st->reg);
|
|
- regulator_put(st->reg);
|
|
- }
|
|
+ regulator_disable(st->vref);
|
|
+ regulator_disable(st->reg);
|
|
kfree(st->rx_buf);
|
|
iio_device_free(indio_dev);
|
|
|
|
--- a/drivers/staging/iio/adc/ad799x.h
|
|
+++ b/drivers/staging/iio/adc/ad799x.h
|
|
@@ -103,7 +103,7 @@ struct ad799x_state {
|
|
struct i2c_client *client;
|
|
const struct ad799x_chip_info *chip_info;
|
|
struct regulator *reg;
|
|
- u16 int_vref_mv;
|
|
+ struct regulator *vref;
|
|
unsigned id;
|
|
u16 config;
|
|
|
|
@@ -111,14 +111,6 @@ struct ad799x_state {
|
|
unsigned int transfer_size;
|
|
};
|
|
|
|
-/*
|
|
- * TODO: struct ad799x_platform_data needs to go into include/linux/iio
|
|
- */
|
|
-
|
|
-struct ad799x_platform_data {
|
|
- u16 vref_mv;
|
|
-};
|
|
-
|
|
#ifdef CONFIG_AD799X_RING_BUFFER
|
|
int ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev);
|
|
void ad799x_ring_cleanup(struct iio_dev *indio_dev);
|