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SubjectRe: [PATCH 10/13] iio: health/afe440x: Make gain settings a modifier for the stages
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Date
On 01/05/16 21:37, Andrew F. Davis wrote:
> Currently the TIA gain settings are exported to userspace as sysfs
> entries that do not clearly represent their internal relation to the
> sampling stages. The gain settings are enabled on a per-stage basis,
> this can be seen in figure 24 of the current AFE4404 datasheet.
> These gain settings should therefore be tied to the channels that are
> read during these stages. Make this change here.
>
> Signed-off-by: Andrew F. Davis <afd@ti.com>
I'd not understood this right originally. Good to clear this up!

Applied. I'll add a reply to the cover letter later explaining why
I am risking these ABI changes, whilst bouncing back much smaller ones.

Jonathan
> ---
> .../ABI/testing/sysfs-bus-iio-health-afe440x | 19 ++++++------
> drivers/iio/health/afe4403.c | 34 ++++++++++++++--------
> drivers/iio/health/afe4404.c | 34 ++++++++++++++--------
> 3 files changed, 53 insertions(+), 34 deletions(-)
>
> diff --git a/Documentation/ABI/testing/sysfs-bus-iio-health-afe440x b/Documentation/ABI/testing/sysfs-bus-iio-health-afe440x
> index a067073..6adba90 100644
> --- a/Documentation/ABI/testing/sysfs-bus-iio-health-afe440x
> +++ b/Documentation/ABI/testing/sysfs-bus-iio-health-afe440x
> @@ -1,13 +1,3 @@
> -What: /sys/bus/iio/devices/iio:deviceX/tia_resistanceY
> - /sys/bus/iio/devices/iio:deviceX/tia_capacitanceY
> -Date: December 2015
> -KernelVersion:
> -Contact: Andrew F. Davis <afd@ti.com>
> -Description:
> - Get and set the resistance and the capacitance settings for the
> - Transimpedance Amplifier. Y is 1 for Rf1 and Cf1, Y is 2 for
> - Rf2 and Cf2 values.
> -
> What: /sys/bus/iio/devices/iio:deviceX/in_intensityY_raw
> Date: May 2016
> KernelVersion:
> @@ -33,6 +23,15 @@ Description:
> Get and set the offset cancellation DAC setting for these
> stages. The values are expressed in 5-bit sign-magnitude.
>
> +What: /sys/bus/iio/devices/iio:deviceX/in_intensityY_resistance
> +What: /sys/bus/iio/devices/iio:deviceX/in_intensityY_capacitance
> +Date: May 2016
> +KernelVersion:
> +Contact: Andrew F. Davis <afd@ti.com>
> +Description:
> + Get and set the resistance and the capacitance settings for the
> + Transimpedance Amplifier during the associated stage.
> +
> What: /sys/bus/iio/devices/iio:deviceX/out_currentY_raw
> Date: May 2016
> KernelVersion:
> diff --git a/drivers/iio/health/afe4403.c b/drivers/iio/health/afe4403.c
> index 1950155..610631b 100644
> --- a/drivers/iio/health/afe4403.c
> +++ b/drivers/iio/health/afe4403.c
> @@ -161,7 +161,7 @@ static const struct afe440x_val_table afe4403_res_table[] = {
> { 500000 }, { 250000 }, { 100000 }, { 50000 },
> { 25000 }, { 10000 }, { 1000000 }, { 0 },
> };
> -AFE440X_TABLE_ATTR(tia_resistance_available, afe4403_res_table);
> +AFE440X_TABLE_ATTR(in_intensity_resistance_available, afe4403_res_table);
>
> static const struct afe440x_val_table afe4403_cap_table[] = {
> { 0, 5000 }, { 0, 10000 }, { 0, 20000 }, { 0, 25000 },
> @@ -173,7 +173,7 @@ static const struct afe440x_val_table afe4403_cap_table[] = {
> { 0, 205000 }, { 0, 210000 }, { 0, 220000 }, { 0, 225000 },
> { 0, 230000 }, { 0, 235000 }, { 0, 245000 }, { 0, 250000 },
> };
> -AFE440X_TABLE_ATTR(tia_capacitance_available, afe4403_cap_table);
> +AFE440X_TABLE_ATTR(in_intensity_capacitance_available, afe4403_cap_table);
>
> static ssize_t afe440x_show_register(struct device *dev,
> struct device_attribute *attr,
> @@ -226,19 +226,29 @@ static ssize_t afe440x_store_register(struct device *dev,
> return count;
> }
>
> -static AFE440X_ATTR(tia_resistance1, F_RF_LED1, afe4403_res_table);
> -static AFE440X_ATTR(tia_capacitance1, F_CF_LED1, afe4403_cap_table);
> +static AFE440X_ATTR(in_intensity1_resistance, F_RF_LED, afe4403_res_table);
> +static AFE440X_ATTR(in_intensity1_capacitance, F_CF_LED, afe4403_cap_table);
>
> -static AFE440X_ATTR(tia_resistance2, F_RF_LED, afe4403_res_table);
> -static AFE440X_ATTR(tia_capacitance2, F_CF_LED, afe4403_cap_table);
> +static AFE440X_ATTR(in_intensity2_resistance, F_RF_LED, afe4403_res_table);
> +static AFE440X_ATTR(in_intensity2_capacitance, F_CF_LED, afe4403_cap_table);
> +
> +static AFE440X_ATTR(in_intensity3_resistance, F_RF_LED1, afe4403_res_table);
> +static AFE440X_ATTR(in_intensity3_capacitance, F_CF_LED1, afe4403_cap_table);
> +
> +static AFE440X_ATTR(in_intensity4_resistance, F_RF_LED1, afe4403_res_table);
> +static AFE440X_ATTR(in_intensity4_capacitance, F_CF_LED1, afe4403_cap_table);
>
> static struct attribute *afe440x_attributes[] = {
> - &afe440x_attr_tia_resistance1.dev_attr.attr,
> - &afe440x_attr_tia_capacitance1.dev_attr.attr,
> - &afe440x_attr_tia_resistance2.dev_attr.attr,
> - &afe440x_attr_tia_capacitance2.dev_attr.attr,
> - &dev_attr_tia_resistance_available.attr,
> - &dev_attr_tia_capacitance_available.attr,
> + &dev_attr_in_intensity_resistance_available.attr,
> + &dev_attr_in_intensity_capacitance_available.attr,
> + &afe440x_attr_in_intensity1_resistance.dev_attr.attr,
> + &afe440x_attr_in_intensity1_capacitance.dev_attr.attr,
> + &afe440x_attr_in_intensity2_resistance.dev_attr.attr,
> + &afe440x_attr_in_intensity2_capacitance.dev_attr.attr,
> + &afe440x_attr_in_intensity3_resistance.dev_attr.attr,
> + &afe440x_attr_in_intensity3_capacitance.dev_attr.attr,
> + &afe440x_attr_in_intensity4_resistance.dev_attr.attr,
> + &afe440x_attr_in_intensity4_capacitance.dev_attr.attr,
> NULL
> };
>
> diff --git a/drivers/iio/health/afe4404.c b/drivers/iio/health/afe4404.c
> index 0d1af4a..69116cd 100644
> --- a/drivers/iio/health/afe4404.c
> +++ b/drivers/iio/health/afe4404.c
> @@ -179,7 +179,7 @@ static const struct afe440x_val_table afe4404_res_table[] = {
> { .integer = 1000000, .fract = 0 },
> { .integer = 2000000, .fract = 0 },
> };
> -AFE440X_TABLE_ATTR(tia_resistance_available, afe4404_res_table);
> +AFE440X_TABLE_ATTR(in_intensity_resistance_available, afe4404_res_table);
>
> static const struct afe440x_val_table afe4404_cap_table[] = {
> { .integer = 0, .fract = 5000 },
> @@ -191,7 +191,7 @@ static const struct afe440x_val_table afe4404_cap_table[] = {
> { .integer = 0, .fract = 25000 },
> { .integer = 0, .fract = 22500 },
> };
> -AFE440X_TABLE_ATTR(tia_capacitance_available, afe4404_cap_table);
> +AFE440X_TABLE_ATTR(in_intensity_capacitance_available, afe4404_cap_table);
>
> static ssize_t afe440x_show_register(struct device *dev,
> struct device_attribute *attr,
> @@ -244,19 +244,29 @@ static ssize_t afe440x_store_register(struct device *dev,
> return count;
> }
>
> -static AFE440X_ATTR(tia_resistance1, F_TIA_GAIN, afe4404_res_table);
> -static AFE440X_ATTR(tia_capacitance1, TIA_CF, afe4404_cap_table);
> +static AFE440X_ATTR(in_intensity1_resistance, F_TIA_GAIN_SEP, afe4404_res_table);
> +static AFE440X_ATTR(in_intensity1_capacitance, F_TIA_CF_SEP, afe4404_cap_table);
>
> -static AFE440X_ATTR(tia_resistance2, F_TIA_GAIN_SEP, afe4404_res_table);
> -static AFE440X_ATTR(tia_capacitance2, F_TIA_CF_SEP, afe4404_cap_table);
> +static AFE440X_ATTR(in_intensity2_resistance, F_TIA_GAIN_SEP, afe4404_res_table);
> +static AFE440X_ATTR(in_intensity2_capacitance, F_TIA_CF_SEP, afe4404_cap_table);
> +
> +static AFE440X_ATTR(in_intensity3_resistance, F_TIA_GAIN, afe4404_res_table);
> +static AFE440X_ATTR(in_intensity3_capacitance, TIA_CF, afe4404_cap_table);
> +
> +static AFE440X_ATTR(in_intensity4_resistance, F_TIA_GAIN, afe4404_res_table);
> +static AFE440X_ATTR(in_intensity4_capacitance, TIA_CF, afe4404_cap_table);
>
> static struct attribute *afe440x_attributes[] = {
> - &afe440x_attr_tia_resistance1.dev_attr.attr,
> - &afe440x_attr_tia_capacitance1.dev_attr.attr,
> - &afe440x_attr_tia_resistance2.dev_attr.attr,
> - &afe440x_attr_tia_capacitance2.dev_attr.attr,
> - &dev_attr_tia_resistance_available.attr,
> - &dev_attr_tia_capacitance_available.attr,
> + &dev_attr_in_intensity_resistance_available.attr,
> + &dev_attr_in_intensity_capacitance_available.attr,
> + &afe440x_attr_in_intensity1_resistance.dev_attr.attr,
> + &afe440x_attr_in_intensity1_capacitance.dev_attr.attr,
> + &afe440x_attr_in_intensity2_resistance.dev_attr.attr,
> + &afe440x_attr_in_intensity2_capacitance.dev_attr.attr,
> + &afe440x_attr_in_intensity3_resistance.dev_attr.attr,
> + &afe440x_attr_in_intensity3_capacitance.dev_attr.attr,
> + &afe440x_attr_in_intensity4_resistance.dev_attr.attr,
> + &afe440x_attr_in_intensity4_capacitance.dev_attr.attr,
> NULL
> };
>
>

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