linux-kernel - Re: [PATCH v2 11/14] iio: accel: adxl345: add activity event feature

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Message-ID: <20250216174312.2424443a@jic23-huawei>
Date: Sun, 16 Feb 2025 17:43:12 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: Lothar Rubusch <l.rubusch@...il.com>
Cc: lars@...afoo.de, Michael.Hennerich@...log.com,
 linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
 eraretuya@...il.com
Subject: Re: [PATCH v2 11/14] iio: accel: adxl345: add activity event
 feature

On Mon, 10 Feb 2025 11:01:16 +0000
Lothar Rubusch <l.rubusch@...il.com> wrote:

> Make the sensor detect and issue interrupts at activity. Activity
> events are configured by a threshold.
> 
> Activity, together with ODR and range setting are preparing a setup
> together with inactivity coming in a follow up patch.
> 
> Signed-off-by: Lothar Rubusch <l.rubusch@...il.com>
> ---
>  drivers/iio/accel/adxl345_core.c | 172 ++++++++++++++++++++++++++++++-
>  1 file changed, 171 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/accel/adxl345_core.c b/drivers/iio/accel/adxl345_core.c
> index ea7bfe193d31..16dea2a222d9 100644
> --- a/drivers/iio/accel/adxl345_core.c
> +++ b/drivers/iio/accel/adxl345_core.c
> @@ -35,6 +35,7 @@
>  
>  #define ADXL345_REG_TAP_AXIS_MSK	GENMASK(2, 0)
>  #define ADXL345_REG_TAP_SUPPRESS_MSK	BIT(3)
> +#define ADXL345_REG_ACT_AXIS_MSK	GENMASK(6, 4)
>  
>  enum adxl345_axis {
>  	ADXL345_Z_EN = BIT(0),
> @@ -67,6 +68,23 @@ static const unsigned int adxl345_tap_time_reg[3] = {
>  	[ADXL345_TAP_TIME_DUR] = ADXL345_REG_DUR,
>  };
>  
> +/* activity/inactivity */
> +enum adxl345_activity_type {
> +	ADXL345_ACTIVITY,
> +};
> +
> +static const unsigned int adxl345_act_int_reg[2] = {
> +	[ADXL345_ACTIVITY] = ADXL345_INT_ACTIVITY,
As before [] for these to avoid having to set to 1 here and
update in next patch.

> +};
> +
> +static const unsigned int adxl345_act_thresh_reg[2] = {
> +	[ADXL345_ACTIVITY] = ADXL345_REG_THRESH_ACT,
> +};
> +
> +static const unsigned int adxl345_act_axis_msk[2] = {
> +	[ADXL345_ACTIVITY] = ADXL345_REG_ACT_AXIS_MSK,
> +};

> +
> +static int adxl345_set_act_inact_en(struct adxl345_state *st,
> +				    enum adxl345_activity_type type, bool cmd_en)
> +{
> +	bool axis_en, en = false;
> +	int ret;
> +
> +	ret = adxl345_write_act_axis(st, type, cmd_en);
> +	if (ret)
> +		return ret;
> +
> +	if (type == ADXL345_ACTIVITY) {
> +		axis_en = FIELD_GET(ADXL345_REG_ACT_AXIS_MSK, st->act_axis_ctrl) > 0;
> +		en = axis_en && st->act_threshold > 0;
> +	}
> +
> +	en ? __set_bit(ilog2(adxl345_act_int_reg[type]), (unsigned long *)&st->int_map)
> +		: __clear_bit(ilog2(adxl345_act_int_reg[type]), (unsigned long *)&st->int_map);

Similar comment to earlier on __set_bit()