Commit dce5bdfe authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files

Merge tag 'iio-fixes-for-4.0d' of... 

Merge tag 'iio-fixes-for-4.0d' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus

Jonathan writes:

IIO fixes for 4.0 set 4

A couple more IIO fixes.

* Fix check for HAS_IOMEM in the cc100001_adc driver to avoid build errors.
  Rather curiously it was ORed with Regulator and clock support.
* vf610 driver was trying to use an ADC clock outside the possible
  spec on some boards.  The driver assumed a fixed clock speed previously
  across all boards, but that is not true.  This fix ensures that the
  reported frequency is correct on all boards.
* The adis imu common code directly set the current trigger to the
  driver supplied one.  Unfortunately this didn't increase the use count
  leading to a double free via a particular path of changing the trigger
  then removing the driver.
parents 3d8bbe24 4ce7ca89

drivers/iio/adc/Kconfig

+2 −1
Original line number Diff line number Diff line
@@ -137,7 +137,8 @@ config AXP288_ADC 


config CC10001_ADC

	tristate "Cosmic Circuits 10001 ADC driver"

	depends on HAS_IOMEM || HAVE_CLK || REGULATOR

	depends on HAVE_CLK || REGULATOR

	depends on HAS_IOMEM

	select IIO_BUFFER

	select IIO_TRIGGERED_BUFFER

	help

drivers/iio/adc/vf610_adc.c

+61 −30
Original line number Diff line number Diff line
@@ -141,9 +141,13 @@ struct vf610_adc { 
	struct regulator *vref;

	struct vf610_adc_feature adc_feature;



	u32 sample_freq_avail[5];



	struct completion completion;

};



static const u32 vf610_hw_avgs[] = { 1, 4, 8, 16, 32 };



#define VF610_ADC_CHAN(_idx, _chan_type) {			\

	.type = (_chan_type),					\

	.indexed = 1,						\
@@ -180,35 +184,47 @@ static const struct iio_chan_spec vf610_adc_iio_channels[] = { 
	/* sentinel */

};



static inline void vf610_adc_calculate_rates(struct vf610_adc *info)

{

	unsigned long adck_rate, ipg_rate = clk_get_rate(info->clk);

	int i;



	/*

 * ADC sample frequency, unit is ADCK cycles.

 * ADC clk source is ipg clock, which is the same as bus clock.

	 * Calculate ADC sample frequencies

	 * Sample time unit is ADCK cycles. ADCK clk source is ipg clock,

	 * which is the same as bus clock.

	 *

	 * ADC conversion time = SFCAdder + AverageNum x (BCT + LSTAdder)

	 * SFCAdder: fixed to 6 ADCK cycles

	 * AverageNum: 1, 4, 8, 16, 32 samples for hardware average.

	 * BCT (Base Conversion Time): fixed to 25 ADCK cycles for 12 bit mode

	 * LSTAdder(Long Sample Time): fixed to 3 ADCK cycles

 *

 * By default, enable 12 bit resolution mode, clock source

 * set to ipg clock, So get below frequency group:

	 */

static const u32 vf610_sample_freq_avail[5] =

{1941176, 559332, 286957, 145374, 73171};

	adck_rate = ipg_rate / info->adc_feature.clk_div;

	for (i = 0; i < ARRAY_SIZE(vf610_hw_avgs); i++)

		info->sample_freq_avail[i] =

			adck_rate / (6 + vf610_hw_avgs[i] * (25 + 3));

}



static inline void vf610_adc_cfg_init(struct vf610_adc *info)

{

	struct vf610_adc_feature *adc_feature = &info->adc_feature;



	/* set default Configuration for ADC controller */

	info->adc_feature.clk_sel = VF610_ADCIOC_BUSCLK_SET;

	info->adc_feature.vol_ref = VF610_ADCIOC_VR_VREF_SET;

	adc_feature->clk_sel = VF610_ADCIOC_BUSCLK_SET;

	adc_feature->vol_ref = VF610_ADCIOC_VR_VREF_SET;



	info->adc_feature.calibration = true;

	info->adc_feature.ovwren = true;

	adc_feature->calibration = true;

	adc_feature->ovwren = true;



	info->adc_feature.clk_div = 1;

	info->adc_feature.res_mode = 12;

	info->adc_feature.sample_rate = 1;

	info->adc_feature.lpm = true;

	adc_feature->res_mode = 12;

	adc_feature->sample_rate = 1;

	adc_feature->lpm = true;



	/* Use a save ADCK which is below 20MHz on all devices */

	adc_feature->clk_div = 8;



	vf610_adc_calculate_rates(info);

}



static void vf610_adc_cfg_post_set(struct vf610_adc *info)
@@ -290,12 +306,10 @@ static void vf610_adc_cfg_set(struct vf610_adc *info) 


	cfg_data = readl(info->regs + VF610_REG_ADC_CFG);



	/* low power configuration */

	cfg_data &= ~VF610_ADC_ADLPC_EN;

	if (adc_feature->lpm)

		cfg_data |= VF610_ADC_ADLPC_EN;



	/* disable high speed */

	cfg_data &= ~VF610_ADC_ADHSC_EN;



	writel(cfg_data, info->regs + VF610_REG_ADC_CFG);
@@ -435,10 +449,27 @@ static irqreturn_t vf610_adc_isr(int irq, void *dev_id) 
	return IRQ_HANDLED;

}



static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("1941176, 559332, 286957, 145374, 73171");

static ssize_t vf610_show_samp_freq_avail(struct device *dev,

				struct device_attribute *attr, char *buf)

{

	struct vf610_adc *info = iio_priv(dev_to_iio_dev(dev));

	size_t len = 0;

	int i;



	for (i = 0; i < ARRAY_SIZE(info->sample_freq_avail); i++)

		len += scnprintf(buf + len, PAGE_SIZE - len,

			"%u ", info->sample_freq_avail[i]);



	/* replace trailing space by newline */

	buf[len - 1] = '\n';



	return len;

}



static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(vf610_show_samp_freq_avail);



static struct attribute *vf610_attributes[] = {

	&iio_const_attr_sampling_frequency_available.dev_attr.attr,

	&iio_dev_attr_sampling_frequency_available.dev_attr.attr,

	NULL

};
@@ -502,7 +533,7 @@ static int vf610_read_raw(struct iio_dev *indio_dev, 
		return IIO_VAL_FRACTIONAL_LOG2;



	case IIO_CHAN_INFO_SAMP_FREQ:

		*val = vf610_sample_freq_avail[info->adc_feature.sample_rate];

		*val = info->sample_freq_avail[info->adc_feature.sample_rate];

		*val2 = 0;

		return IIO_VAL_INT;
@@ -525,9 +556,9 @@ static int vf610_write_raw(struct iio_dev *indio_dev, 
	switch (mask) {

		case IIO_CHAN_INFO_SAMP_FREQ:

			for (i = 0;

				i < ARRAY_SIZE(vf610_sample_freq_avail);

				i < ARRAY_SIZE(info->sample_freq_avail);

				i++)

				if (val == vf610_sample_freq_avail[i]) {

				if (val == info->sample_freq_avail[i]) {

					info->adc_feature.sample_rate = i;

					vf610_adc_sample_set(info);

					return 0;

drivers/iio/imu/adis_trigger.c

+1 −1
Original line number Diff line number Diff line
@@ -60,7 +60,7 @@ int adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev) 
	iio_trigger_set_drvdata(adis->trig, adis);

	ret = iio_trigger_register(adis->trig);



	indio_dev->trig = adis->trig;

	indio_dev->trig = iio_trigger_get(adis->trig);

	if (ret)

		goto error_free_irq;

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