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Message-ID: <c875266c-f675-bba3-4e05-bf34ea02df2c@kernel.org>
Date: Wed, 4 May 2016 11:02:29 +0100
From: Jonathan Cameron <jic23@...nel.org>
To: "Andrew F. Davis" <afd@...com>, Hartmut Knaack <knaack.h@....de>,
Lars-Peter Clausen <lars@...afoo.de>,
Peter Meerwald <pmeerw@...erw.net>
Cc: linux-iio@...r.kernel.org, linux-api@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/13] iio: health/afe440x: Always use separate gain
values
On 01/05/16 21:36, Andrew F. Davis wrote:
> 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@...com>
Hmm. ABI change but as you said it's an improvement.
Honestly I doubt anyone is using this device without also using userspace that
you are providing so lets apply this an cross our fingers that no one minds.
Applied.
> ---
> .../ABI/testing/sysfs-bus-iio-health-afe440x | 9 ----
> drivers/iio/health/afe4403.c | 60 ++++++----------------
> drivers/iio/health/afe4404.c | 60 ++++++----------------
> drivers/iio/health/afe440x.h | 15 ++----
> 4 files changed, 37 insertions(+), 107 deletions(-)
>
> diff --git a/Documentation/ABI/testing/sysfs-bus-iio-health-afe440x b/Documentation/ABI/testing/sysfs-bus-iio-health-afe440x
> index 3740f25..b19053a 100644
> --- a/Documentation/ABI/testing/sysfs-bus-iio-health-afe440x
> +++ b/Documentation/ABI/testing/sysfs-bus-iio-health-afe440x
> @@ -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@...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
> diff --git a/drivers/iio/health/afe4403.c b/drivers/iio/health/afe4403.c
> index 5484785..bcff528 100644
> --- a/drivers/iio/health/afe4403.c
> +++ b/drivers/iio/health/afe4403.c
> @@ -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, ®_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, 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_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_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[] = {
> diff --git a/drivers/iio/health/afe4404.c b/drivers/iio/health/afe4404.c
> index 2d4c522..b9c1666 100644
> --- a/drivers/iio/health/afe4404.c
> +++ b/drivers/iio/health/afe4404.c
> @@ -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, ®_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, 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_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_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 },
> };
>
> diff --git a/drivers/iio/health/afe440x.h b/drivers/iio/health/afe440x.h
> index c671ab7..544bbab 100644
> --- a/drivers/iio/health/afe440x.h
> +++ b/drivers/iio/health/afe440x.h
> @@ -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 */
>
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