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5 Commits

Author SHA1 Message Date
Fabrice Gasnier
179858efd9 iio: adc: stm32-dfsdm: fix clock source selection 
Add missing clock source selection. In case "audio" clock is provided,
it's unused currently: "dfsdm" clock is wrongly used by default.

Fixes: bed73904e76f ("IIO: ADC: add stm32 DFSDM core support")

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
 2018-02-24 12:58:39 +00:00
Fabrice Gasnier
4e4f9fbc56 iio: adc: stm32-dfsdm: fix compatible data use 
Fix use of compatible data: stm32h7 regmap configuration is statically
used. Rather use regmap_cfg from compatible data.

Fixes: bed73904e76f ("IIO: ADC: add stm32 DFSDM core support")

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
 2018-02-24 12:55:43 +00:00
Arnaud Pouliquen
abaca806fd
IIO: ADC: stm32-dfsdm: code optimization 
Use of_device_get_match_data to optimize the source code.
No check is needed on dev_data as match table is defined in driver.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
 2018-01-15 18:50:21 +00:00
Arnd Bergmann
2514071741
IIO: ADC: stm32-dfsdm: avoid unused-variable warning 
Building with CONFIG_OF disabled produces a compiler warning:

drivers/iio/adc/stm32-dfsdm-core.c: In function 'stm32_dfsdm_probe':
drivers/iio/adc/stm32-dfsdm-core.c:245:22: error: unused variable 'pnode' [-Werror=unused-variable]

This removes the variable and open-codes it in the only place
it gets used to avoid that warning.

Fixes: bed73904e76f ("IIO: ADC: add stm32 DFSDM core support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
 2018-01-11 12:30:21 +00:00
Arnaud Pouliquen
bed73904e7
IIO: ADC: add stm32 DFSDM core support 
Add driver for stm32 DFSDM pheripheral. Its converts a sigma delta
stream in n bit samples through a low pass filter and an integrator.
stm32-dfsdm-core driver is the core part supporting the filter
instances dedicated to sigma-delta ADC or audio PDM microphone purpose.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
 2018-01-10 10:30:11 +00:00