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drivers: adc: xec: Handle incomplete ADC channel conversions

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Report an error when the ADC # channels conversion is not
complete.

Signed-off-by: Jose Alberto Meza <jose.a.meza.arellano@intel.com>
This commit is contained in:
Jose Alberto Meza 2022-08-29 14:48:55 -07:00 committed by Fabio Baltieri
parent 1b0d97574a
commit bccc4e62f2
1 changed files with 17 additions and 5 deletions
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22
drivers/adc/adc_mchp_xec.c
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@ -221,7 +221,7 @@ static int adc_xec_read_async(const struct device *dev,
}
#endif /* CONFIG_ADC_ASYNC */
static void xec_adc_get_sample(const struct device *dev)
static int xec_adc_get_sample(const struct device *dev)
{
struct adc_xec_regs *adc_regs = ADC_XEC_REG_BASE;
struct adc_xec_data *data = dev->data;
@ -240,7 +240,6 @@ static void xec_adc_get_sample(const struct device *dev)
bit = find_lsb_set(channels);
while (bit != 0) {
idx = bit - 1;
*data->buffer = (uint16_t)adc_regs->channel_read_reg[idx];
data->buffer++;
@ -250,6 +249,15 @@ static void xec_adc_get_sample(const struct device *dev)
/* Clear the status register */
adc_regs->status_reg = ch_status;
/* Return error when requested ADC conversion was incomplete
* for some channels.
*/
if (ch_status != adc_regs->single_reg) {
return -EIO;
}
return 0;
}
static void adc_xec_isr(const struct device *dev)
@ -257,6 +265,7 @@ static void adc_xec_isr(const struct device *dev)
struct adc_xec_regs *adc_regs = ADC_XEC_REG_BASE;
struct adc_xec_data *data = dev->data;
uint32_t reg;
int ret;
/* Clear START_SINGLE bit and clear SINGLE_DONE_STATUS */
reg = adc_regs->control_reg;
@ -267,9 +276,12 @@ static void adc_xec_isr(const struct device *dev)
/* Also clear GIRQ source status bit */
MCHP_GIRQ_SRC(MCHP_ADC_GIRQ) = MCHP_ADC_SNG_DONE_GIRQ_VAL;
xec_adc_get_sample(dev);
adc_context_on_sampling_done(&data->ctx, dev);
ret = xec_adc_get_sample(dev);
if (ret) {
adc_context_complete(&data->ctx, ret);
} else {
adc_context_on_sampling_done(&data->ctx, dev);
}
LOG_DBG("ADC ISR triggered.");
}