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path: root/drivers/iio/adc
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Diffstat (limited to 'drivers/iio/adc')
-rw-r--r--drivers/iio/adc/meson_saradc.c4
-rw-r--r--drivers/iio/adc/stm32-dfsdm-adc.c39
-rw-r--r--drivers/iio/adc/stm32-dfsdm-core.c12
3 files changed, 34 insertions, 21 deletions
diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 29fa7736d80c..ede955d9b2a4 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -462,8 +462,10 @@ static int meson_sar_adc_lock(struct iio_dev *indio_dev)
regmap_read(priv->regmap, MESON_SAR_ADC_DELAY, &val);
} while (val & MESON_SAR_ADC_DELAY_BL30_BUSY && timeout--);
- if (timeout < 0)
+ if (timeout < 0) {
+ mutex_unlock(&indio_dev->mlock);
return -ETIMEDOUT;
+ }
}
return 0;
diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c
index daa026d6a94f..01422d11753c 100644
--- a/drivers/iio/adc/stm32-dfsdm-adc.c
+++ b/drivers/iio/adc/stm32-dfsdm-adc.c
@@ -54,7 +54,6 @@ struct stm32_dfsdm_adc {
struct stm32_dfsdm *dfsdm;
const struct stm32_dfsdm_dev_data *dev_data;
unsigned int fl_id;
- unsigned int ch_id;
/* ADC specific */
unsigned int oversamp;
@@ -384,7 +383,7 @@ static ssize_t dfsdm_adc_audio_set_spiclk(struct iio_dev *indio_dev,
{
struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
struct stm32_dfsdm_filter *fl = &adc->dfsdm->fl_list[adc->fl_id];
- struct stm32_dfsdm_channel *ch = &adc->dfsdm->ch_list[adc->ch_id];
+ struct stm32_dfsdm_channel *ch = &adc->dfsdm->ch_list[chan->channel];
unsigned int sample_freq = adc->sample_freq;
unsigned int spi_freq;
int ret;
@@ -419,18 +418,20 @@ static ssize_t dfsdm_adc_audio_set_spiclk(struct iio_dev *indio_dev,
return len;
}
-static int stm32_dfsdm_start_conv(struct stm32_dfsdm_adc *adc, bool dma)
+static int stm32_dfsdm_start_conv(struct stm32_dfsdm_adc *adc,
+ const struct iio_chan_spec *chan,
+ bool dma)
{
struct regmap *regmap = adc->dfsdm->regmap;
int ret;
unsigned int dma_en = 0, cont_en = 0;
- ret = stm32_dfsdm_start_channel(adc->dfsdm, adc->ch_id);
+ ret = stm32_dfsdm_start_channel(adc->dfsdm, chan->channel);
if (ret < 0)
return ret;
ret = stm32_dfsdm_filter_configure(adc->dfsdm, adc->fl_id,
- adc->ch_id);
+ chan->channel);
if (ret < 0)
goto stop_channels;
@@ -464,12 +465,13 @@ stop_channels:
regmap_update_bits(regmap, DFSDM_CR1(adc->fl_id),
DFSDM_CR1_RCONT_MASK, 0);
- stm32_dfsdm_stop_channel(adc->dfsdm, adc->fl_id);
+ stm32_dfsdm_stop_channel(adc->dfsdm, chan->channel);
return ret;
}
-static void stm32_dfsdm_stop_conv(struct stm32_dfsdm_adc *adc)
+static void stm32_dfsdm_stop_conv(struct stm32_dfsdm_adc *adc,
+ const struct iio_chan_spec *chan)
{
struct regmap *regmap = adc->dfsdm->regmap;
@@ -482,7 +484,7 @@ static void stm32_dfsdm_stop_conv(struct stm32_dfsdm_adc *adc)
regmap_update_bits(regmap, DFSDM_CR1(adc->fl_id),
DFSDM_CR1_RCONT_MASK, 0);
- stm32_dfsdm_stop_channel(adc->dfsdm, adc->ch_id);
+ stm32_dfsdm_stop_channel(adc->dfsdm, chan->channel);
}
static int stm32_dfsdm_set_watermark(struct iio_dev *indio_dev,
@@ -609,6 +611,7 @@ static int stm32_dfsdm_adc_dma_start(struct iio_dev *indio_dev)
static int stm32_dfsdm_postenable(struct iio_dev *indio_dev)
{
struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
+ const struct iio_chan_spec *chan = &indio_dev->channels[0];
int ret;
/* Reset adc buffer index */
@@ -618,7 +621,7 @@ static int stm32_dfsdm_postenable(struct iio_dev *indio_dev)
if (ret < 0)
return ret;
- ret = stm32_dfsdm_start_conv(adc, true);
+ ret = stm32_dfsdm_start_conv(adc, chan, true);
if (ret) {
dev_err(&indio_dev->dev, "Can't start conversion\n");
goto stop_dfsdm;
@@ -635,7 +638,7 @@ static int stm32_dfsdm_postenable(struct iio_dev *indio_dev)
return 0;
err_stop_conv:
- stm32_dfsdm_stop_conv(adc);
+ stm32_dfsdm_stop_conv(adc, chan);
stop_dfsdm:
stm32_dfsdm_stop_dfsdm(adc->dfsdm);
@@ -645,11 +648,12 @@ stop_dfsdm:
static int stm32_dfsdm_predisable(struct iio_dev *indio_dev)
{
struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
+ const struct iio_chan_spec *chan = &indio_dev->channels[0];
if (adc->dma_chan)
dmaengine_terminate_all(adc->dma_chan);
- stm32_dfsdm_stop_conv(adc);
+ stm32_dfsdm_stop_conv(adc, chan);
stm32_dfsdm_stop_dfsdm(adc->dfsdm);
@@ -730,7 +734,7 @@ static int stm32_dfsdm_single_conv(struct iio_dev *indio_dev,
if (ret < 0)
goto stop_dfsdm;
- ret = stm32_dfsdm_start_conv(adc, false);
+ ret = stm32_dfsdm_start_conv(adc, chan, false);
if (ret < 0) {
regmap_update_bits(adc->dfsdm->regmap, DFSDM_CR2(adc->fl_id),
DFSDM_CR2_REOCIE_MASK, DFSDM_CR2_REOCIE(0));
@@ -751,7 +755,7 @@ static int stm32_dfsdm_single_conv(struct iio_dev *indio_dev,
else
ret = IIO_VAL_INT;
- stm32_dfsdm_stop_conv(adc);
+ stm32_dfsdm_stop_conv(adc, chan);
stop_dfsdm:
stm32_dfsdm_stop_dfsdm(adc->dfsdm);
@@ -765,7 +769,7 @@ static int stm32_dfsdm_write_raw(struct iio_dev *indio_dev,
{
struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
struct stm32_dfsdm_filter *fl = &adc->dfsdm->fl_list[adc->fl_id];
- struct stm32_dfsdm_channel *ch = &adc->dfsdm->ch_list[adc->ch_id];
+ struct stm32_dfsdm_channel *ch = &adc->dfsdm->ch_list[chan->channel];
unsigned int spi_freq = adc->spi_freq;
int ret = -EINVAL;
@@ -972,7 +976,6 @@ static int stm32_dfsdm_adc_chan_init_one(struct iio_dev *indio_dev,
}
ch->scan_type.realbits = 24;
ch->scan_type.storagebits = 32;
- adc->ch_id = ch->channel;
return stm32_dfsdm_chan_configure(adc->dfsdm,
&adc->dfsdm->ch_list[ch->channel]);
@@ -1001,7 +1004,7 @@ static int stm32_dfsdm_audio_init(struct iio_dev *indio_dev)
}
ch->info_mask_separate = BIT(IIO_CHAN_INFO_SAMP_FREQ);
- d_ch = &adc->dfsdm->ch_list[adc->ch_id];
+ d_ch = &adc->dfsdm->ch_list[ch->channel];
if (d_ch->src != DFSDM_CHANNEL_SPI_CLOCK_EXTERNAL)
adc->spi_freq = adc->dfsdm->spi_master_freq;
@@ -1042,8 +1045,8 @@ static int stm32_dfsdm_adc_init(struct iio_dev *indio_dev)
return -ENOMEM;
for (chan_idx = 0; chan_idx < num_ch; chan_idx++) {
- ch->scan_index = chan_idx;
- ret = stm32_dfsdm_adc_chan_init_one(indio_dev, ch);
+ ch[chan_idx].scan_index = chan_idx;
+ ret = stm32_dfsdm_adc_chan_init_one(indio_dev, &ch[chan_idx]);
if (ret < 0) {
dev_err(&indio_dev->dev, "Channels init failed\n");
return ret;
diff --git a/drivers/iio/adc/stm32-dfsdm-core.c b/drivers/iio/adc/stm32-dfsdm-core.c
index 6290332cfd3f..e50efdcc41ff 100644
--- a/drivers/iio/adc/stm32-dfsdm-core.c
+++ b/drivers/iio/adc/stm32-dfsdm-core.c
@@ -83,7 +83,7 @@ int stm32_dfsdm_start_dfsdm(struct stm32_dfsdm *dfsdm)
{
struct dfsdm_priv *priv = container_of(dfsdm, struct dfsdm_priv, dfsdm);
struct device *dev = &priv->pdev->dev;
- unsigned int clk_div = priv->spi_clk_out_div;
+ unsigned int clk_div = priv->spi_clk_out_div, clk_src;
int ret;
if (atomic_inc_return(&priv->n_active_ch) == 1) {
@@ -100,6 +100,14 @@ int stm32_dfsdm_start_dfsdm(struct stm32_dfsdm *dfsdm)
}
}
+ /* select clock source, e.g. 0 for "dfsdm" or 1 for "audio" */
+ clk_src = priv->aclk ? 1 : 0;
+ ret = regmap_update_bits(dfsdm->regmap, DFSDM_CHCFGR1(0),
+ DFSDM_CHCFGR1_CKOUTSRC_MASK,
+ DFSDM_CHCFGR1_CKOUTSRC(clk_src));
+ if (ret < 0)
+ goto disable_aclk;
+
/* Output the SPI CLKOUT (if clk_div == 0 clock if OFF) */
ret = regmap_update_bits(dfsdm->regmap, DFSDM_CHCFGR1(0),
DFSDM_CHCFGR1_CKOUTDIV_MASK,
@@ -274,7 +282,7 @@ static int stm32_dfsdm_probe(struct platform_device *pdev)
dfsdm->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "dfsdm",
dfsdm->base,
- &stm32h7_dfsdm_regmap_cfg);
+ dev_data->regmap_cfg);
if (IS_ERR(dfsdm->regmap)) {
ret = PTR_ERR(dfsdm->regmap);
dev_err(&pdev->dev, "%s: Failed to allocate regmap: %d\n",
generated by cgit (git 2.34.1) at 2024-06-08 07:31:31 +0000