Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
iio: adc: adi-axi-adc: add oversampling
Add support for enabling/disabling oversampling.
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Link: https://patch.msgid.link/20250214131955.31973-8-antoniu.miclaus@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
authored by
Antoniu Miclaus
and committed by
Jonathan Cameron
208a94c8
7a794e3a
+24
+24
drivers/iio/adc/adi-axi-adc.c
+24
drivers/iio/adc/adi-axi-adc.c
···
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#define ADI_AXI_ADC_CTRL_DDR_EDGESEL_MASK BIT(1)
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#define ADI_AXI_ADC_REG_CNTRL_3 0x004c
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#define AXI_AD485X_CNTRL_3_OS_EN_MSK BIT(2)
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#define AXI_AD485X_CNTRL_3_PACKET_FORMAT_MSK GENMASK(1, 0)
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#define AXI_AD485X_PACKET_FORMAT_20BIT 0x0
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#define AXI_AD485X_PACKET_FORMAT_24BIT 0x1
···
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FIELD_PREP(AXI_AD485X_CNTRL_3_PACKET_FORMAT_MSK, val));
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}
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static int axi_adc_ad485x_oversampling_ratio_set(struct iio_backend *back,
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unsigned int ratio)
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{
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struct adi_axi_adc_state *st = iio_backend_get_priv(back);
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/* The current state of the function enables or disables the
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* oversampling in REG_CNTRL_3 register. A ratio equal to 1 implies no
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* oversampling, while a value greater than 1 implies oversampling being
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* enabled.
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*/
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switch (ratio) {
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case 0:
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return -EINVAL;
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case 1:
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return regmap_clear_bits(st->regmap, ADI_AXI_ADC_REG_CNTRL_3,
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AXI_AD485X_CNTRL_3_OS_EN_MSK);
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default:
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return regmap_set_bits(st->regmap, ADI_AXI_ADC_REG_CNTRL_3,
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AXI_AD485X_CNTRL_3_OS_EN_MSK);
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}
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}
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static struct iio_buffer *axi_adc_request_buffer(struct iio_backend *back,
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struct iio_dev *indio_dev)
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{
···
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.chan_status = axi_adc_chan_status,
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.interface_type_get = axi_adc_interface_type_get,
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.data_size_set = axi_adc_ad485x_data_size_set,
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.oversampling_ratio_set = axi_adc_ad485x_oversampling_ratio_set,
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.debugfs_reg_access = iio_backend_debugfs_ptr(axi_adc_reg_access),
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.debugfs_print_chan_status =
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iio_backend_debugfs_ptr(axi_adc_debugfs_print_chan_status),