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First set of IIO fixes for the 5.0 cycle. 

Been a busy month, so these are rather later than they should have been.
 
 * atlas-ph-sensor:
   - Temperature scale didn't correspond to the ABI.
 * axp288:
   - A few different fixes around the TS-pin handling.
 * ti-ads8688
   - Not enough space in the buffer used to build the scan to allow for
     the timestamp.
 * tools - iio_generic_buffer
   - Make num_loops signed so that we really are running for ever
     rather than just a long time when we specify -1.
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Merge tag 'iio-fixes-5.0a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus

Jonathan writes:

First set of IIO fixes for the 5.0 cycle.

Been a busy month, so these are rather later than they should have been.

* atlas-ph-sensor:
  - Temperature scale didn't correspond to the ABI.
* axp288:
  - A few different fixes around the TS-pin handling.
* ti-ads8688
  - Not enough space in the buffer used to build the scan to allow for
    the timestamp.
* tools - iio_generic_buffer
  - Make num_loops signed so that we really are running for ever
    rather than just a long time when we specify -1.

* tag 'iio-fixes-5.0a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio:
  iio: ti-ads8688: Update buffer allocation for timestamps
  tools: iio: iio_generic_buffer: make num_loops signed
  iio: adc: axp288: Fix TS-pin handling
  iio: chemical: atlas-ph-sensor: correct IIO_TEMP values to millicelsius
This commit is contained in:
Greg Kroah-Hartman 2019-02-03 13:10:41 +01:00
parent 798badf846 f214ff521f
commit 6d923f8fe8
4 changed files with 66 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

76
drivers/iio/adc/axp288_adc.c
View File

@ -27,9 +27,18 @@
#include <linux/iio/machine.h>
#include <linux/iio/driver.h>
#define AXP288_ADC_EN_MASK 0xF1
#define AXP288_ADC_TS_PIN_GPADC 0xF2
#define AXP288_ADC_TS_PIN_ON 0xF3
/*
* This mask enables all ADCs except for the battery temp-sensor (TS), that is
* left as-is to avoid breaking charging on devices without a temp-sensor.
*/
#define AXP288_ADC_EN_MASK 0xF0
#define AXP288_ADC_TS_ENABLE 0x01
#define AXP288_ADC_TS_CURRENT_ON_OFF_MASK GENMASK(1, 0)
#define AXP288_ADC_TS_CURRENT_OFF (0 << 0)
#define AXP288_ADC_TS_CURRENT_ON_WHEN_CHARGING (1 << 0)
#define AXP288_ADC_TS_CURRENT_ON_ONDEMAND (2 << 0)
#define AXP288_ADC_TS_CURRENT_ON (3 << 0)
enum axp288_adc_id {
AXP288_ADC_TS,
@ -44,6 +53,7 @@ enum axp288_adc_id {
struct axp288_adc_info {
int irq;
struct regmap *regmap;
bool ts_enabled;
};
static const struct iio_chan_spec axp288_adc_channels[] = {
@ -115,21 +125,33 @@ static int axp288_adc_read_channel(int *val, unsigned long address,
return IIO_VAL_INT;
}
static int axp288_adc_set_ts(struct regmap *regmap, unsigned int mode,
unsigned long address)
/*
* The current-source used for the battery temp-sensor (TS) is shared
* with the GPADC. For proper fuel-gauge and charger operation the TS
* current-source needs to be permanently on. But to read the GPADC we
* need to temporary switch the TS current-source to ondemand, so that
* the GPADC can use it, otherwise we will always read an all 0 value.
*/
static int axp288_adc_set_ts(struct axp288_adc_info *info,
unsigned int mode, unsigned long address)
{
int ret;
/* channels other than GPADC do not need to switch TS pin */
/* No need to switch the current-source if the TS pin is disabled */
if (!info->ts_enabled)
return 0;
/* Channels other than GPADC do not need the current source */
if (address != AXP288_GP_ADC_H)
return 0;
ret = regmap_write(regmap, AXP288_ADC_TS_PIN_CTRL, mode);
ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL,
AXP288_ADC_TS_CURRENT_ON_OFF_MASK, mode);
if (ret)
return ret;
/* When switching to the GPADC pin give things some time to settle */
if (mode == AXP288_ADC_TS_PIN_GPADC)
if (mode == AXP288_ADC_TS_CURRENT_ON_ONDEMAND)
usleep_range(6000, 10000);
return 0;
@ -145,14 +167,14 @@ static int axp288_adc_read_raw(struct iio_dev *indio_dev,
mutex_lock(&indio_dev->mlock);
switch (mask) {
case IIO_CHAN_INFO_RAW:
if (axp288_adc_set_ts(info->regmap, AXP288_ADC_TS_PIN_GPADC,
if (axp288_adc_set_ts(info, AXP288_ADC_TS_CURRENT_ON_ONDEMAND,
chan->address)) {
dev_err(&indio_dev->dev, "GPADC mode\n");
ret = -EINVAL;
break;
}
ret = axp288_adc_read_channel(val, chan->address, info->regmap);
if (axp288_adc_set_ts(info->regmap, AXP288_ADC_TS_PIN_ON,
if (axp288_adc_set_ts(info, AXP288_ADC_TS_CURRENT_ON,
chan->address))
dev_err(&indio_dev->dev, "TS pin restore\n");
break;
@ -164,13 +186,35 @@ static int axp288_adc_read_raw(struct iio_dev *indio_dev,
return ret;
}
static int axp288_adc_set_state(struct regmap *regmap)
static int axp288_adc_initialize(struct axp288_adc_info *info)
{
/* ADC should be always enabled for internal FG to function */
if (regmap_write(regmap, AXP288_ADC_TS_PIN_CTRL, AXP288_ADC_TS_PIN_ON))
return -EIO;
int ret, adc_enable_val;
return regmap_write(regmap, AXP20X_ADC_EN1, AXP288_ADC_EN_MASK);
/*
* Determine if the TS pin is enabled and set the TS current-source
* accordingly.
*/
ret = regmap_read(info->regmap, AXP20X_ADC_EN1, &adc_enable_val);
if (ret)
return ret;
if (adc_enable_val & AXP288_ADC_TS_ENABLE) {
info->ts_enabled = true;
ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL,
AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
AXP288_ADC_TS_CURRENT_ON);
} else {
info->ts_enabled = false;
ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL,
AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
AXP288_ADC_TS_CURRENT_OFF);
}
if (ret)
return ret;
/* Turn on the ADC for all channels except TS, leave TS as is */
return regmap_update_bits(info->regmap, AXP20X_ADC_EN1,
AXP288_ADC_EN_MASK, AXP288_ADC_EN_MASK);
}
static const struct iio_info axp288_adc_iio_info = {
@ -200,7 +244,7 @@ static int axp288_adc_probe(struct platform_device *pdev)
* Set ADC to enabled state at all time, including system suspend.
* otherwise internal fuel gauge functionality may be affected.
*/
ret = axp288_adc_set_state(axp20x->regmap);
ret = axp288_adc_initialize(info);
if (ret) {
dev_err(&pdev->dev, "unable to enable ADC device\n");
return ret;

3
drivers/iio/adc/ti-ads8688.c
View File

@ -41,6 +41,7 @@
#define ADS8688_VREF_MV 4096
#define ADS8688_REALBITS 16
#define ADS8688_MAX_CHANNELS 8
/*
* enum ads8688_range - ADS8688 reference voltage range
@ -385,7 +386,7 @@ static irqreturn_t ads8688_trigger_handler(int irq, void *p)
{
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
u16 buffer[8];
u16 buffer[ADS8688_MAX_CHANNELS + sizeof(s64)/sizeof(u16)];
int i, j = 0;
for (i = 0; i < indio_dev->masklength; i++) {

7
drivers/iio/chemical/atlas-ph-sensor.c
View File

@ -444,9 +444,8 @@ static int atlas_read_raw(struct iio_dev *indio_dev,
case IIO_CHAN_INFO_SCALE:
switch (chan->type) {
case IIO_TEMP:
*val = 1; /* 0.01 */
*val2 = 100;
break;
*val = 10;
return IIO_VAL_INT;
case IIO_PH:
*val = 1; /* 0.001 */
*val2 = 1000;
@ -477,7 +476,7 @@ static int atlas_write_raw(struct iio_dev *indio_dev,
int val, int val2, long mask)
{
struct atlas_data *data = iio_priv(indio_dev);
__be32 reg = cpu_to_be32(val);
__be32 reg = cpu_to_be32(val / 10);
if (val2 != 0 || val < 0 || val > 20000)
return -EINVAL;

2
tools/iio/iio_generic_buffer.c
View File

@ -330,7 +330,7 @@ static const struct option longopts[] = {
int main(int argc, char **argv)
{
unsigned long long num_loops = 2;
long long num_loops = 2;
unsigned long timedelay = 1000000;
unsigned long buf_len = 128;