The units after application of scale are 100*m/s^2,
The scale calculation is only for the device
with the range of 3, 6, 12, and 24g,
but some other chips have a range of 2, 4, 6, and 8g.
Modified the scales from formula to a list, the scales in the list are
calculated as 9.8/32768*pow(2,reg41+1)*1.5, refer to datasheet 5.3.4.
The new units after the application of scale are m/s^2.
Reviewed-by: Alexandru Ardelean <[email protected]>
Signed-off-by: LI Qingwu <[email protected]>
---
drivers/iio/accel/bmi088-accel-core.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/iio/accel/bmi088-accel-core.c b/drivers/iio/accel/bmi088-accel-core.c
index d74465214feb..3f38967c5a0a 100644
--- a/drivers/iio/accel/bmi088-accel-core.c
+++ b/drivers/iio/accel/bmi088-accel-core.c
@@ -73,6 +73,8 @@
#define BMI088_ACCEL_FIFO_MODE_FIFO 0x40
#define BMI088_ACCEL_FIFO_MODE_STREAM 0x80
+#define BMIO088_ACCEL_ACC_RANGE_MSK GENMASK(1, 0)
+
enum bmi088_accel_axis {
AXIS_X,
AXIS_Y,
@@ -119,6 +121,7 @@ struct bmi088_accel_chip_info {
u8 chip_id;
const struct iio_chan_spec *channels;
int num_channels;
+ const int scale_table[4][2];
};
struct bmi088_accel_data {
@@ -280,6 +283,7 @@ static int bmi088_accel_read_raw(struct iio_dev *indio_dev,
struct bmi088_accel_data *data = iio_priv(indio_dev);
struct device *dev = regmap_get_device(data->regmap);
int ret;
+ int reg;
switch (mask) {
case IIO_CHAN_INFO_RAW:
@@ -330,13 +334,14 @@ static int bmi088_accel_read_raw(struct iio_dev *indio_dev,
return ret;
ret = regmap_read(data->regmap,
- BMI088_ACCEL_REG_ACC_RANGE, val);
+ BMI088_ACCEL_REG_ACC_RANGE, ®);
if (ret)
goto out_read_raw_pm_put;
- *val2 = 15 - (*val & 0x3);
- *val = 3 * 980;
- ret = IIO_VAL_FRACTIONAL_LOG2;
+ reg = FIELD_GET(BMIO088_ACCEL_ACC_RANGE_MSK, reg);
+ *val = data->chip_info->scale_table[reg][0];
+ *val2 = data->chip_info->scale_table[reg][1];
+ ret = IIO_VAL_INT_PLUS_MICRO;
goto out_read_raw_pm_put;
default:
@@ -432,6 +437,7 @@ static const struct bmi088_accel_chip_info bmi088_accel_chip_info_tbl[] = {
.chip_id = 0x1E,
.channels = bmi088_accel_channels,
.num_channels = ARRAY_SIZE(bmi088_accel_channels),
+ .scale_table = {{0, 897}, {0, 1794}, {0, 3589}, {0, 7178}},
},
};
--
2.25.1
Hi LI,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on jic23-iio/togreg]
[also build test ERROR on v5.18 next-20220525]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/intel-lab-lkp/linux/commits/LI-Qingwu/iio-accel-bmi088-support-BMI085-BMI090L/20220525-211157
base: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
config: x86_64-randconfig-a016 (https://download.01.org/0day-ci/archive/20220526/[email protected]/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d52a6e75b0c402c7f3b42a2b1b2873f151220947)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/intel-lab-lkp/linux/commit/71cdfb0a9a6ddbf8737a46bc6161fb921b1ac2f4
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review LI-Qingwu/iio-accel-bmi088-support-BMI085-BMI090L/20220525-211157
git checkout 71cdfb0a9a6ddbf8737a46bc6161fb921b1ac2f4
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <[email protected]>
All errors (new ones prefixed by >>):
>> drivers/iio/accel/bmi088-accel-core.c:341:10: error: call to undeclared function 'FIELD_GET'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
reg = FIELD_GET(BMIO088_ACCEL_ACC_RANGE_MSK, reg);
^
1 error generated.
vim +/FIELD_GET +341 drivers/iio/accel/bmi088-accel-core.c
278
279 static int bmi088_accel_read_raw(struct iio_dev *indio_dev,
280 struct iio_chan_spec const *chan,
281 int *val, int *val2, long mask)
282 {
283 struct bmi088_accel_data *data = iio_priv(indio_dev);
284 struct device *dev = regmap_get_device(data->regmap);
285 int ret;
286 int reg;
287
288 switch (mask) {
289 case IIO_CHAN_INFO_RAW:
290 switch (chan->type) {
291 case IIO_TEMP:
292 ret = pm_runtime_resume_and_get(dev);
293 if (ret)
294 return ret;
295
296 ret = bmi088_accel_get_temp(data, val);
297 goto out_read_raw_pm_put;
298 case IIO_ACCEL:
299 ret = pm_runtime_resume_and_get(dev);
300 if (ret)
301 return ret;
302
303 ret = iio_device_claim_direct_mode(indio_dev);
304 if (ret)
305 goto out_read_raw_pm_put;
306
307 ret = bmi088_accel_get_axis(data, chan, val);
308 iio_device_release_direct_mode(indio_dev);
309 if (!ret)
310 ret = IIO_VAL_INT;
311
312 goto out_read_raw_pm_put;
313 default:
314 return -EINVAL;
315 }
316 case IIO_CHAN_INFO_OFFSET:
317 switch (chan->type) {
318 case IIO_TEMP:
319 /* Offset applies before scale */
320 *val = BMI088_ACCEL_TEMP_OFFSET/BMI088_ACCEL_TEMP_UNIT;
321 return IIO_VAL_INT;
322 default:
323 return -EINVAL;
324 }
325 case IIO_CHAN_INFO_SCALE:
326 switch (chan->type) {
327 case IIO_TEMP:
328 /* 0.125 degrees per LSB */
329 *val = BMI088_ACCEL_TEMP_UNIT;
330 return IIO_VAL_INT;
331 case IIO_ACCEL:
332 ret = pm_runtime_resume_and_get(dev);
333 if (ret)
334 return ret;
335
336 ret = regmap_read(data->regmap,
337 BMI088_ACCEL_REG_ACC_RANGE, ®);
338 if (ret)
339 goto out_read_raw_pm_put;
340
> 341 reg = FIELD_GET(BMIO088_ACCEL_ACC_RANGE_MSK, reg);
342 *val = data->chip_info->scale_table[reg][0];
343 *val2 = data->chip_info->scale_table[reg][1];
344 ret = IIO_VAL_INT_PLUS_MICRO;
345
346 goto out_read_raw_pm_put;
347 default:
348 return -EINVAL;
349 }
350 case IIO_CHAN_INFO_SAMP_FREQ:
351 ret = pm_runtime_resume_and_get(dev);
352 if (ret)
353 return ret;
354
355 ret = bmi088_accel_get_sample_freq(data, val, val2);
356 goto out_read_raw_pm_put;
357 default:
358 break;
359 }
360
361 return -EINVAL;
362
363 out_read_raw_pm_put:
364 pm_runtime_mark_last_busy(dev);
365 pm_runtime_put_autosuspend(dev);
366
367 return ret;
368 }
369
--
0-DAY CI Kernel Test Service
https://01.org/lkp