[PATCH v7 5/8] iio: dac: ad3552r: changes to use FIELD_PREP

Angelo Dureghello
2024-10-21T12:41:42Z

From: Angelo Dureghello <adureghello@baylibre.com>

Changes to use FIELD_PREP, so that driver-specific ad3552r_field_prep
is removed. Variables (arrays) that was used to call ad3552r_field_prep
are removed too.

Signed-off-by: Angelo Dureghello <adureghello@baylibre.com>
---
drivers/iio/dac/ad3552r.c | 166 ++++++++++++++--------------------------------
1 file changed, 49 insertions(+), 117 deletions(-)

diff --git a/drivers/iio/dac/ad3552r.c b/drivers/iio/dac/ad3552r.c
index 7d61b2fe6624..75825d6a398b 100644
--- a/drivers/iio/dac/ad3552r.c
+++ b/drivers/iio/dac/ad3552r.c
@@ -210,46 +210,6 @@ static const s32 gains_scaling_table[] = {
[AD3552R_CH_GAIN_SCALING_0_125] = 125
};

-enum ad3552r_dev_attributes {
- /* - Direct register values */
- /* From 0-3 */
- AD3552R_SDO_DRIVE_STRENGTH,
- /*
- * 0 -> Internal Vref, vref_io pin floating (default)
- * 1 -> Internal Vref, vref_io driven by internal vref
- * 2 or 3 -> External Vref
- */
- AD3552R_VREF_SELECT,
- /* Read registers in ascending order if set. Else descending */
- AD3552R_ADDR_ASCENSION,
-};
-
-enum ad3552r_ch_attributes {
- /* DAC powerdown */
- AD3552R_CH_DAC_POWERDOWN,
- /* DAC amplifier powerdown */
- AD3552R_CH_AMPLIFIER_POWERDOWN,
- /* Select the output range. Select from enum ad3552r_ch_output_range */
- AD3552R_CH_OUTPUT_RANGE_SEL,
- /*
- * Over-rider the range selector in order to manually set the output
- * voltage range
- */
- AD3552R_CH_RANGE_OVERRIDE,
- /* Manually set the offset voltage */
- AD3552R_CH_GAIN_OFFSET,
- /* Sets the polarity of the offset. */
- AD3552R_CH_GAIN_OFFSET_POLARITY,
- /* PDAC gain scaling */
- AD3552R_CH_GAIN_SCALING_P,
- /* NDAC gain scaling */
- AD3552R_CH_GAIN_SCALING_N,
- /* Rfb value */
- AD3552R_CH_RFB,
- /* Channel select. When set allow Input -> DAC and Mask -> DAC */
- AD3552R_CH_SELECT,
-};
-
struct ad3552r_ch_data {
s32 scale_int;
s32 scale_dec;
@@ -285,45 +245,6 @@ struct ad3552r_desc {
unsigned int num_ch;
};

-static const u16 addr_mask_map[][2] = {
- [AD3552R_ADDR_ASCENSION] = {
- AD3552R_REG_ADDR_INTERFACE_CONFIG_A,
- AD3552R_MASK_ADDR_ASCENSION
- },
- [AD3552R_SDO_DRIVE_STRENGTH] = {
- AD3552R_REG_ADDR_INTERFACE_CONFIG_D,
- AD3552R_MASK_SDO_DRIVE_STRENGTH
- },
- [AD3552R_VREF_SELECT] = {
- AD3552R_REG_ADDR_SH_REFERENCE_CONFIG,
- AD3552R_MASK_REFERENCE_VOLTAGE_SEL
- },
-};
-
-/* 0 -> reg addr, 1->ch0 mask, 2->ch1 mask */
-static const u16 addr_mask_map_ch[][3] = {
- [AD3552R_CH_DAC_POWERDOWN] = {
- AD3552R_REG_ADDR_POWERDOWN_CONFIG,
- AD3552R_MASK_CH_DAC_POWERDOWN(0),
- AD3552R_MASK_CH_DAC_POWERDOWN(1)
- },
- [AD3552R_CH_AMPLIFIER_POWERDOWN] = {
- AD3552R_REG_ADDR_POWERDOWN_CONFIG,
- AD3552R_MASK_CH_AMPLIFIER_POWERDOWN(0),
- AD3552R_MASK_CH_AMPLIFIER_POWERDOWN(1)
- },
- [AD3552R_CH_OUTPUT_RANGE_SEL] = {
- AD3552R_REG_ADDR_CH0_CH1_OUTPUT_RANGE,
- AD3552R_MASK_CH_OUTPUT_RANGE_SEL(0),
- AD3552R_MASK_CH_OUTPUT_RANGE_SEL(1)
- },
- [AD3552R_CH_SELECT] = {
- AD3552R_REG_ADDR_CH_SELECT_16B,
- AD3552R_MASK_CH(0),
- AD3552R_MASK_CH(1)
- }
-};
-
static u8 _ad3552r_reg_len(u8 addr)
{
switch (addr) {
@@ -399,11 +320,6 @@ static int ad3552r_read_reg(struct ad3552r_desc *dac, u8 addr, u16 *val)
return 0;
}

-static u16 ad3552r_field_prep(u16 val, u16 mask)
-{
- return (val << __ffs(mask)) & mask;
-}
-
/* Update field of a register, shift val if needed */
static int ad3552r_update_reg_field(struct ad3552r_desc *dac, u8 addr, u16 mask,
u16 val)
@@ -416,21 +332,11 @@ static int ad3552r_update_reg_field(struct ad3552r_desc *dac, u8 addr, u16 mask,
return ret;

reg &= ~mask;
- reg |= ad3552r_field_prep(val, mask);
+ reg |= val;

return ad3552r_write_reg(dac, addr, reg);
}

-static int ad3552r_set_ch_value(struct ad3552r_desc *dac,
- enum ad3552r_ch_attributes attr,
- u8 ch,
- u16 val)
-{
- /* Update register related to attributes in chip */
- return ad3552r_update_reg_field(dac, addr_mask_map_ch[attr][0],
- addr_mask_map_ch[attr][ch + 1], val);
-}
-
#define AD3552R_CH_DAC(_idx) ((struct iio_chan_spec) { \
.type = IIO_VOLTAGE, \
.output = true, \
@@ -510,8 +416,14 @@ static int ad3552r_write_raw(struct iio_dev *indio_dev,
val);
break;
case IIO_CHAN_INFO_ENABLE:
- err = ad3552r_set_ch_value(dac, AD3552R_CH_DAC_POWERDOWN,
- chan->channel, !val);
+ if (chan->channel == 0)
+ val = FIELD_PREP(AD3552R_MASK_CH_DAC_POWERDOWN(0), !val);
+ else
+ val = FIELD_PREP(AD3552R_MASK_CH_DAC_POWERDOWN(1), !val);
+
+ err = ad3552r_update_reg_field(dac, AD3552R_REG_ADDR_POWERDOWN_CONFIG,
+ AD3552R_MASK_CH_DAC_POWERDOWN(chan->channel),
+ val);
break;
default:
err = -EINVAL;
@@ -715,9 +627,9 @@ static int ad3552r_reset(struct ad3552r_desc *dac)
}

return ad3552r_update_reg_field(dac,
- addr_mask_map[AD3552R_ADDR_ASCENSION][0],
- addr_mask_map[AD3552R_ADDR_ASCENSION][1],
- val);
+ AD3552R_REG_ADDR_INTERFACE_CONFIG_A,
+ AD3552R_MASK_ADDR_ASCENSION,
+ FIELD_PREP(AD3552R_MASK_ADDR_ASCENSION, val));
}

static void ad3552r_get_custom_range(struct ad3552r_desc *dac, s32 i, s32 *v_min,
@@ -812,20 +724,20 @@ static int ad3552r_configure_custom_gain(struct ad3552r_desc *dac,
"mandatory custom-output-range-config property missing\n");

dac->ch_data[ch].range_override = 1;
- reg |= ad3552r_field_prep(1, AD3552R_MASK_CH_RANGE_OVERRIDE);
+ reg |= FIELD_PREP(AD3552R_MASK_CH_RANGE_OVERRIDE, 1);

err = fwnode_property_read_u32(gain_child, "adi,gain-scaling-p", &val);
if (err)
return dev_err_probe(dev, err,
"mandatory adi,gain-scaling-p property missing\n");
- reg |= ad3552r_field_prep(val, AD3552R_MASK_CH_GAIN_SCALING_P);
+ reg |= FIELD_PREP(AD3552R_MASK_CH_GAIN_SCALING_P, val);
dac->ch_data[ch].p = val;

err = fwnode_property_read_u32(gain_child, "adi,gain-scaling-n", &val);
if (err)
return dev_err_probe(dev, err,
"mandatory adi,gain-scaling-n property missing\n");
- reg |= ad3552r_field_prep(val, AD3552R_MASK_CH_GAIN_SCALING_N);
+ reg |= FIELD_PREP(AD3552R_MASK_CH_GAIN_SCALING_N, val);
dac->ch_data[ch].n = val;

err = fwnode_property_read_u32(gain_child, "adi,rfb-ohms", &val);
@@ -841,9 +753,9 @@ static int ad3552r_configure_custom_gain(struct ad3552r_desc *dac,
dac->ch_data[ch].gain_offset = val;

offset = abs((s32)val);
- reg |= ad3552r_field_prep((offset >> 8), AD3552R_MASK_CH_OFFSET_BIT_8);
+ reg |= FIELD_PREP(AD3552R_MASK_CH_OFFSET_BIT_8, (offset >> 8));

- reg |= ad3552r_field_prep((s32)val < 0, AD3552R_MASK_CH_OFFSET_POLARITY);
+ reg |= FIELD_PREP(AD3552R_MASK_CH_OFFSET_POLARITY, (s32)val < 0);
addr = AD3552R_REG_ADDR_CH_GAIN(ch);
err = ad3552r_write_reg(dac, addr,
offset & AD3552R_MASK_CH_OFFSET_BITS_0_7);
@@ -886,9 +798,9 @@ static int ad3552r_configure_device(struct ad3552r_desc *dac)
}

err = ad3552r_update_reg_field(dac,
- addr_mask_map[AD3552R_VREF_SELECT][0],
- addr_mask_map[AD3552R_VREF_SELECT][1],
- val);
+ AD3552R_REG_ADDR_SH_REFERENCE_CONFIG,
+ AD3552R_MASK_REFERENCE_VOLTAGE_SEL,
+ FIELD_PREP(AD3552R_MASK_REFERENCE_VOLTAGE_SEL, val));
if (err)
return err;

@@ -900,9 +812,9 @@ static int ad3552r_configure_device(struct ad3552r_desc *dac)
}

err = ad3552r_update_reg_field(dac,
- addr_mask_map[AD3552R_SDO_DRIVE_STRENGTH][0],
- addr_mask_map[AD3552R_SDO_DRIVE_STRENGTH][1],
- val);
+ AD3552R_REG_ADDR_INTERFACE_CONFIG_D,
+ AD3552R_MASK_SDO_DRIVE_STRENGTH,
+ FIELD_PREP(AD3552R_MASK_SDO_DRIVE_STRENGTH, val));
if (err)
return err;
}
@@ -938,9 +850,15 @@ static int ad3552r_configure_device(struct ad3552r_desc *dac)
"Invalid adi,output-range-microvolt value\n");

val = err;
- err = ad3552r_set_ch_value(dac,
- AD3552R_CH_OUTPUT_RANGE_SEL,
- ch, val);
+ if (ch == 0)
+ val = FIELD_PREP(AD3552R_MASK_CH_OUTPUT_RANGE_SEL(0), val);
+ else
+ val = FIELD_PREP(AD3552R_MASK_CH_OUTPUT_RANGE_SEL(1), val);
+
+ err = ad3552r_update_reg_field(dac,
+ AD3552R_REG_ADDR_CH0_CH1_OUTPUT_RANGE,
+ AD3552R_MASK_CH_OUTPUT_RANGE_SEL(ch),
+ val);
if (err)
return err;

@@ -958,7 +876,14 @@ static int ad3552r_configure_device(struct ad3552r_desc *dac)
ad3552r_calc_gain_and_offset(dac, ch);
dac->enabled_ch |= BIT(ch);

- err = ad3552r_set_ch_value(dac, AD3552R_CH_SELECT, ch, 1);
+ if (ch == 0)
+ val = FIELD_PREP(AD3552R_MASK_CH(0), 1);
+ else
+ val = FIELD_PREP(AD3552R_MASK_CH(1), 1);
+
+ err = ad3552r_update_reg_field(dac,
+ AD3552R_REG_ADDR_CH_SELECT_16B,
+ AD3552R_MASK_CH(ch), val);
if (err < 0)
return err;

@@ -970,8 +895,15 @@ static int ad3552r_configure_device(struct ad3552r_desc *dac)
/* Disable unused channels */
for_each_clear_bit(ch, &dac->enabled_ch,
dac->model_data->num_hw_channels) {
- err = ad3552r_set_ch_value(dac, AD3552R_CH_AMPLIFIER_POWERDOWN,
- ch, 1);
+ if (ch == 0)
+ val = FIELD_PREP(AD3552R_MASK_CH_AMPLIFIER_POWERDOWN(0), 1);
+ else
+ val = FIELD_PREP(AD3552R_MASK_CH_AMPLIFIER_POWERDOWN(1), 1);
+
+ err = ad3552r_update_reg_field(dac,
+ AD3552R_REG_ADDR_POWERDOWN_CONFIG,
+ AD3552R_MASK_CH_AMPLIFIER_POWERDOWN(ch),
+ val);
if (err)
return err;
}

--
2.45.0.rc1