Commit 51bcacc6 authored by Olivier Moysan's avatar Olivier Moysan Committed by Jonathan Cameron
Browse files

iio: adc: stm32-adc: add debugfs to read raw calibration result 



Add debugfs to read linear ADC STM32 self calibration results.

Signed-off-by: default avatarFabrice Gasnier <fabrice.gasnier@foss.st.com>
Signed-off-by: default avatarOlivier Moysan <olivier.moysan@foss.st.com>
Reviewed-by: default avatarFabrice Gasnier <fabrice.gasnier@foss.st.com>
Link: https://lore.kernel.org/r/20221115103124.70074-4-olivier.moysan@foss.st.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 2206732b

drivers/iio/adc/stm32-adc.c

+22 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ 
 */



#include <linux/clk.h>

#include <linux/debugfs.h>

#include <linux/delay.h>

#include <linux/dma-mapping.h>

#include <linux/dmaengine.h>
@@ -1879,6 +1880,23 @@ static const struct iio_chan_spec_ext_info stm32_adc_ext_info[] = { 
	{},

};



static void stm32_adc_debugfs_init(struct iio_dev *indio_dev)

{

	struct stm32_adc *adc = iio_priv(indio_dev);

	struct dentry *d = iio_get_debugfs_dentry(indio_dev);

	struct stm32_adc_calib *cal = &adc->cal;

	char buf[16];

	unsigned int i;



	if (!adc->cfg->has_linearcal)

		return;



	for (i = 0; i < STM32H7_LINCALFACT_NUM; i++) {

		snprintf(buf, sizeof(buf), "lincalfact%d", i + 1);

		debugfs_create_u32(buf, 0444, d, &cal->lincalfact[i]);

	}

}



static int stm32_adc_fw_get_resolution(struct iio_dev *indio_dev)

{

	struct device *dev = &indio_dev->dev;
@@ -2465,6 +2483,9 @@ static int stm32_adc_probe(struct platform_device *pdev) 
	pm_runtime_mark_last_busy(dev);

	pm_runtime_put_autosuspend(dev);



	if (IS_ENABLED(CONFIG_DEBUG_FS))

		stm32_adc_debugfs_init(indio_dev);



	return 0;



err_hw_stop:
@@ -2493,6 +2514,7 @@ static int stm32_adc_remove(struct platform_device *pdev) 
	struct stm32_adc *adc = iio_priv(indio_dev);



	pm_runtime_get_sync(&pdev->dev);

	/* iio_device_unregister() also removes debugfs entries */

	iio_device_unregister(indio_dev);

	stm32_adc_hw_stop(&pdev->dev);

	pm_runtime_disable(&pdev->dev);