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iio: health/afe440x: Always use separate gain values 

Locking the two gain stages to the same setting adds no value for us,
so initialize them as unlocked and remove the sysfs for unlocking them.
This also allows us to greatly simplify showing and setting the gain
registers.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
hifive-unleashed-5.1
Andrew F. Davis 2016-05-01 15:36:54 -05:00 committed by Jonathan Cameron
parent e85fa0338b
commit 81f517270d
4 changed files with 37 additions and 107 deletions
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9
Documentation/ABI/testing/sysfs-bus-iio-health-afe440x
View File

@ -8,15 +8,6 @@ Description:
Transimpedance Amplifier. Y is 1 for Rf1 and Cf1, Y is 2 for
Rf2 and Cf2 values.
What: /sys/bus/iio/devices/iio:deviceX/tia_separate_en
Date: December 2015
KernelVersion:
Contact: Andrew F. Davis <afd@ti.com>
Description:
Enable or disable separate settings for the TransImpedance
Amplifier above, when disabled both values are set by the
first channel.
What: /sys/bus/iio/devices/iio:deviceX/in_intensity_ledY_raw
/sys/bus/iio/devices/iio:deviceX/in_intensity_ledY_ambient_raw
Date: December 2015

60
drivers/iio/health/afe4403.c
View File

@ -180,9 +180,9 @@ static ssize_t afe440x_show_register(struct device *dev,
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct afe4403_data *afe = iio_priv(indio_dev);
struct afe440x_attr *afe440x_attr = to_afe440x_attr(attr);
unsigned int reg_val, type;
unsigned int reg_val;
int vals[2];
int ret, val_len;
int ret;
ret = regmap_read(afe->regmap, afe440x_attr->reg, &reg_val);
if (ret)
@ -191,27 +191,13 @@ static ssize_t afe440x_show_register(struct device *dev,
reg_val &= afe440x_attr->mask;
reg_val >>= afe440x_attr->shift;
switch (afe440x_attr->type) {
case SIMPLE:
type = IIO_VAL_INT;
val_len = 1;
vals[0] = reg_val;
break;
case RESISTANCE:
case CAPACITANCE:
type = IIO_VAL_INT_PLUS_MICRO;
val_len = 2;
if (reg_val < afe440x_attr->table_size) {
vals[0] = afe440x_attr->val_table[reg_val].integer;
vals[1] = afe440x_attr->val_table[reg_val].fract;
break;
}
if (reg_val >= afe440x_attr->table_size)
return -EINVAL;
default:
return -EINVAL;
}
return iio_format_value(buf, type, val_len, vals);
vals[0] = afe440x_attr->val_table[reg_val].integer;
vals[1] = afe440x_attr->val_table[reg_val].fract;
return iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, vals);
}
static ssize_t afe440x_store_register(struct device *dev,
@ -227,22 +213,12 @@ static ssize_t afe440x_store_register(struct device *dev,
if (ret)
return ret;
switch (afe440x_attr->type) {
case SIMPLE:
val = integer;
break;
case RESISTANCE:
case CAPACITANCE:
for (val = 0; val < afe440x_attr->table_size; val++)
if (afe440x_attr->val_table[val].integer == integer &&
afe440x_attr->val_table[val].fract == fract)
break;
if (val == afe440x_attr->table_size)
return -EINVAL;
break;
default:
for (val = 0; val < afe440x_attr->table_size; val++)
if (afe440x_attr->val_table[val].integer == integer &&
afe440x_attr->val_table[val].fract == fract)
break;
if (val == afe440x_attr->table_size)
return -EINVAL;
}
ret = regmap_update_bits(afe->regmap, afe440x_attr->reg,
afe440x_attr->mask,
@ -253,16 +229,13 @@ static ssize_t afe440x_store_register(struct device *dev,
return count;
}
static AFE440X_ATTR(tia_separate_en, AFE4403_TIAGAIN, AFE440X_TIAGAIN_ENSEPGAIN, SIMPLE, NULL, 0);
static AFE440X_ATTR(tia_resistance1, AFE4403_TIAGAIN, AFE4403_TIAGAIN_RES, afe4403_res_table);
static AFE440X_ATTR(tia_capacitance1, AFE4403_TIAGAIN, AFE4403_TIAGAIN_CAP, afe4403_cap_table);
static AFE440X_ATTR(tia_resistance1, AFE4403_TIAGAIN, AFE4403_TIAGAIN_RES, RESISTANCE, afe4403_res_table, ARRAY_SIZE(afe4403_res_table));
static AFE440X_ATTR(tia_capacitance1, AFE4403_TIAGAIN, AFE4403_TIAGAIN_CAP, CAPACITANCE, afe4403_cap_table, ARRAY_SIZE(afe4403_cap_table));
static AFE440X_ATTR(tia_resistance2, AFE4403_TIA_AMB_GAIN, AFE4403_TIAGAIN_RES, RESISTANCE, afe4403_res_table, ARRAY_SIZE(afe4403_res_table));
static AFE440X_ATTR(tia_capacitance2, AFE4403_TIA_AMB_GAIN, AFE4403_TIAGAIN_RES, CAPACITANCE, afe4403_cap_table, ARRAY_SIZE(afe4403_cap_table));
static AFE440X_ATTR(tia_resistance2, AFE4403_TIA_AMB_GAIN, AFE4403_TIAGAIN_RES, afe4403_res_table);
static AFE440X_ATTR(tia_capacitance2, AFE4403_TIA_AMB_GAIN, AFE4403_TIAGAIN_RES, afe4403_cap_table);
static struct attribute *afe440x_attributes[] = {
&afe440x_attr_tia_separate_en.dev_attr.attr,
&afe440x_attr_tia_resistance1.dev_attr.attr,
&afe440x_attr_tia_capacitance1.dev_attr.attr,
&afe440x_attr_tia_resistance2.dev_attr.attr,
@ -473,6 +446,7 @@ static const struct iio_trigger_ops afe4403_trigger_ops = {
static const struct reg_sequence afe4403_reg_sequences[] = {
AFE4403_TIMING_PAIRS,
{ AFE440X_CONTROL1, AFE440X_CONTROL1_TIMEREN },
{ AFE4403_TIAGAIN, AFE440X_TIAGAIN_ENSEPGAIN },
};
static const struct regmap_range afe4403_yes_ranges[] = {

60
drivers/iio/health/afe4404.c
View File

@ -193,9 +193,9 @@ static ssize_t afe440x_show_register(struct device *dev,
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct afe4404_data *afe = iio_priv(indio_dev);
struct afe440x_attr *afe440x_attr = to_afe440x_attr(attr);
unsigned int reg_val, type;
unsigned int reg_val;
int vals[2];
int ret, val_len;
int ret;
ret = regmap_read(afe->regmap, afe440x_attr->reg, &reg_val);
if (ret)
@ -204,27 +204,13 @@ static ssize_t afe440x_show_register(struct device *dev,
reg_val &= afe440x_attr->mask;
reg_val >>= afe440x_attr->shift;
switch (afe440x_attr->type) {
case SIMPLE:
type = IIO_VAL_INT;
val_len = 1;
vals[0] = reg_val;
break;
case RESISTANCE:
case CAPACITANCE:
type = IIO_VAL_INT_PLUS_MICRO;
val_len = 2;
if (reg_val < afe440x_attr->table_size) {
vals[0] = afe440x_attr->val_table[reg_val].integer;
vals[1] = afe440x_attr->val_table[reg_val].fract;
break;
}
if (reg_val >= afe440x_attr->table_size)
return -EINVAL;
default:
return -EINVAL;
}
return iio_format_value(buf, type, val_len, vals);
vals[0] = afe440x_attr->val_table[reg_val].integer;
vals[1] = afe440x_attr->val_table[reg_val].fract;
return iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, vals);
}
static ssize_t afe440x_store_register(struct device *dev,
@ -240,22 +226,12 @@ static ssize_t afe440x_store_register(struct device *dev,
if (ret)
return ret;
switch (afe440x_attr->type) {
case SIMPLE:
val = integer;
break;
case RESISTANCE:
case CAPACITANCE:
for (val = 0; val < afe440x_attr->table_size; val++)
if (afe440x_attr->val_table[val].integer == integer &&
afe440x_attr->val_table[val].fract == fract)
break;
if (val == afe440x_attr->table_size)
return -EINVAL;
break;
default:
for (val = 0; val < afe440x_attr->table_size; val++)
if (afe440x_attr->val_table[val].integer == integer &&
afe440x_attr->val_table[val].fract == fract)
break;
if (val == afe440x_attr->table_size)
return -EINVAL;
}
ret = regmap_update_bits(afe->regmap, afe440x_attr->reg,
afe440x_attr->mask,
@ -266,16 +242,13 @@ static ssize_t afe440x_store_register(struct device *dev,
return count;
}
static AFE440X_ATTR(tia_separate_en, AFE4404_TIA_GAIN_SEP, AFE440X_TIAGAIN_ENSEPGAIN, SIMPLE, NULL, 0);
static AFE440X_ATTR(tia_resistance1, AFE4404_TIA_GAIN, AFE4404_TIA_GAIN_RES, afe4404_res_table);
static AFE440X_ATTR(tia_capacitance1, AFE4404_TIA_GAIN, AFE4404_TIA_GAIN_CAP, afe4404_cap_table);
static AFE440X_ATTR(tia_resistance1, AFE4404_TIA_GAIN, AFE4404_TIA_GAIN_RES, RESISTANCE, afe4404_res_table, ARRAY_SIZE(afe4404_res_table));
static AFE440X_ATTR(tia_capacitance1, AFE4404_TIA_GAIN, AFE4404_TIA_GAIN_CAP, CAPACITANCE, afe4404_cap_table, ARRAY_SIZE(afe4404_cap_table));
static AFE440X_ATTR(tia_resistance2, AFE4404_TIA_GAIN_SEP, AFE4404_TIA_GAIN_RES, RESISTANCE, afe4404_res_table, ARRAY_SIZE(afe4404_res_table));
static AFE440X_ATTR(tia_capacitance2, AFE4404_TIA_GAIN_SEP, AFE4404_TIA_GAIN_CAP, CAPACITANCE, afe4404_cap_table, ARRAY_SIZE(afe4404_cap_table));
static AFE440X_ATTR(tia_resistance2, AFE4404_TIA_GAIN_SEP, AFE4404_TIA_GAIN_RES, afe4404_res_table);
static AFE440X_ATTR(tia_capacitance2, AFE4404_TIA_GAIN_SEP, AFE4404_TIA_GAIN_CAP, afe4404_cap_table);
static struct attribute *afe440x_attributes[] = {
&afe440x_attr_tia_separate_en.dev_attr.attr,
&afe440x_attr_tia_resistance1.dev_attr.attr,
&afe440x_attr_tia_capacitance1.dev_attr.attr,
&afe440x_attr_tia_resistance2.dev_attr.attr,
@ -443,6 +416,7 @@ static const struct iio_trigger_ops afe4404_trigger_ops = {
static const struct reg_sequence afe4404_reg_sequences[] = {
AFE4404_TIMING_PAIRS,
{ AFE440X_CONTROL1, AFE440X_CONTROL1_TIMEREN },
{ AFE4404_TIA_GAIN_SEP, AFE440X_TIAGAIN_ENSEPGAIN },
{ AFE440X_CONTROL2, AFE440X_CONTROL3_OSC_ENABLE },
};

15
drivers/iio/health/afe440x.h
View File

@ -71,8 +71,7 @@
#define AFE440X_CONTROL1_TIMEREN BIT(8)
/* TIAGAIN register fields */
#define AFE440X_TIAGAIN_ENSEPGAIN_MASK BIT(15)
#define AFE440X_TIAGAIN_ENSEPGAIN_SHIFT 15
#define AFE440X_TIAGAIN_ENSEPGAIN BIT(15)
/* CONTROL2 register fields */
#define AFE440X_CONTROL2_PDN_AFE BIT(0)
@ -133,12 +132,6 @@ struct afe440x_reg_info {
.output = true, \
}
enum afe440x_reg_type {
SIMPLE,
RESISTANCE,
CAPACITANCE,
};
struct afe440x_val_table {
int integer;
int fract;
@ -167,7 +160,6 @@ struct afe440x_attr {
unsigned int reg;
unsigned int shift;
unsigned int mask;
enum afe440x_reg_type type;
const struct afe440x_val_table *val_table;
unsigned int table_size;
};
@ -175,7 +167,7 @@ struct afe440x_attr {
#define to_afe440x_attr(_dev_attr) \
container_of(_dev_attr, struct afe440x_attr, dev_attr)
#define AFE440X_ATTR(_name, _reg, _field, _type, _table, _size) \
#define AFE440X_ATTR(_name, _reg, _field, _table) \
struct afe440x_attr afe440x_attr_##_name = { \
.dev_attr = __ATTR(_name, (S_IRUGO | S_IWUSR), \
afe440x_show_register, \
@ -183,9 +175,8 @@ struct afe440x_attr {
.reg = _reg, \
.shift = _field ## _SHIFT, \
.mask = _field ## _MASK, \
.type = _type, \
.val_table = _table, \
.table_size = _size, \
.table_size = ARRAY_SIZE(_table), \
}
#endif /* _AFE440X_H */