| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Mon, 21 Aug 2017 10:47:41 +0200
From: Martin Kepplinger <martink@...teo.de>
To: Harinath Nampally <harinath922@...il.com>
Cc: jic23@...nel.org, knaack.h@....de, lars@...afoo.de,
pmeerw@...erw.net, gregkh@...uxfoundation.org,
linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
amsfield22@...il.com, linux-iio-owner@...r.kernel.org
Subject: Re: [PATCH v4] iio: accel: mma8452: improvements to handle
multiple events
Thanks. I may have missed something, but I'm concerned about only one
thing:
devices without transient event registers. See my comments below.
Am 20.08.2017 18:06 schrieb Harinath Nampally:
> This driver supports multiple devices like mma8653,
> mma8652, mma8452, mma8453 and fxls8471. Almost all
> these devices have more than one event.
>
> Current driver design hardcodes the event specific
> information, so only one event can be supported by this
> driver at any given time.
> Also current design doesn't have the flexibility to
> add more events.
>
> This patch improves by detaching the event related
> information from chip_info struct,and based on channel
> type and event direction the corresponding event
> configuration registers are picked dynamically.
> Hence both transient and freefall events can be
> handled in read/write callbacks.
>
> Changes are thoroughly tested on fxls8471 device on imx6UL
> Eval board using iio_event_monitor user space program.
>
> After this fix both Freefall and Transient events are
> handled by the driver without any conflicts.
>
> Changes since v3 -> v4
> -Add 'const struct ev_regs_accel_falling'
> -Add 'const struct ev_regs_accel_rising'
> -Refactor mma8452_get_event_regs function to
> remove the fill in the struct and return above structs
> -Condense the commit's subject message
>
> Changes since v2 -> v3
> -Fix typo in commit message
> -Replace word 'Bugfix' with 'Improvements'
> -Describe more accurate commit message
> -Replace breaks with returns
> -Initialise transient event threshold mask
> -Remove unrelated change of IIO_ACCEL channel type
> check in read/write event callbacks
>
> Changes since v1 -> v2
> -Fix indentations
> -Remove unused fields in mma8452_event_regs struct
> -Remove redundant return statement
> -Remove unrelated changes like checkpatch.pl warning fixes
>
> Signed-off-by: Harinath Nampally <harinath922@...il.com>
> ---
> drivers/iio/accel/mma8452.c | 277
> ++++++++++++++++++++------------------------
> 1 file changed, 123 insertions(+), 154 deletions(-)
>
> diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
> index eb6e3dc..7bfc257 100644
> --- a/drivers/iio/accel/mma8452.c
> +++ b/drivers/iio/accel/mma8452.c
> @@ -59,7 +59,9 @@
> #define MMA8452_FF_MT_THS 0x17
> #define MMA8452_FF_MT_THS_MASK 0x7f
> #define MMA8452_FF_MT_COUNT 0x18
> +#define MMA8452_FF_MT_CHAN_SHIFT 3
> #define MMA8452_TRANSIENT_CFG 0x1d
> +#define MMA8452_TRANSIENT_CFG_CHAN(chan) BIT(chan + 1)
> #define MMA8452_TRANSIENT_CFG_HPF_BYP BIT(0)
> #define MMA8452_TRANSIENT_CFG_ELE BIT(4)
> #define MMA8452_TRANSIENT_SRC 0x1e
> @@ -69,6 +71,7 @@
> #define MMA8452_TRANSIENT_THS 0x1f
> #define MMA8452_TRANSIENT_THS_MASK GENMASK(6, 0)
> #define MMA8452_TRANSIENT_COUNT 0x20
> +#define MMA8452_TRANSIENT_CHAN_SHIFT 1
> #define MMA8452_CTRL_REG1 0x2a
> #define MMA8452_CTRL_ACTIVE BIT(0)
> #define MMA8452_CTRL_DR_MASK GENMASK(5, 3)
> @@ -107,6 +110,42 @@ struct mma8452_data {
> const struct mma_chip_info *chip_info;
> };
>
> + /**
> + * struct mma8452_event_regs - chip specific data related to events
> + * @ev_cfg: event config register address
> + * @ev_src: event source register address
> + * @ev_ths: event threshold register address
> + * @ev_ths_mask: mask for the threshold value
> + * @ev_count: event count (period) register address
> + *
> + * Since not all chips supported by the driver support comparing high
> pass
> + * filtered data for events (interrupts), different interrupt sources
> are
> + * used for different chips and the relevant registers are included
> here.
> + */
> +struct mma8452_event_regs {
> + u8 ev_cfg;
> + u8 ev_src;
> + u8 ev_ths;
> + u8 ev_ths_mask;
> + u8 ev_count;
> +};
> +
> +static const struct mma8452_event_regs ev_regs_accel_falling = {
> + .ev_cfg = MMA8452_FF_MT_CFG,
> + .ev_src = MMA8452_FF_MT_SRC,
> + .ev_ths = MMA8452_FF_MT_THS,
> + .ev_ths_mask = MMA8452_FF_MT_THS_MASK,
> + .ev_count = MMA8452_FF_MT_COUNT
> +};
> +
> +static const struct mma8452_event_regs ev_regs_accel_rising = {
> + .ev_cfg = MMA8452_TRANSIENT_CFG,
> + .ev_src = MMA8452_TRANSIENT_SRC,
> + .ev_ths = MMA8452_TRANSIENT_THS,
> + .ev_ths_mask = MMA8452_TRANSIENT_THS_MASK,
> + .ev_count = MMA8452_TRANSIENT_COUNT,
> +};
For devices without transient event registers, this cannot work. See
below.
> +
> /**
> * struct mma_chip_info - chip specific data
> * @chip_id: WHO_AM_I register's value
> @@ -116,40 +155,12 @@ struct mma8452_data {
> * @mma_scales: scale factors for converting register values
> * to m/s^2; 3 modes: 2g, 4g, 8g; 2 integers
> * per mode: m/s^2 and micro m/s^2
> - * @ev_cfg: event config register address
> - * @ev_cfg_ele: latch bit in event config register
> - * @ev_cfg_chan_shift: number of the bit to enable events in X
> - * direction; in event config register
> - * @ev_src: event source register address
> - * @ev_src_xe: bit in event source register that indicates
> - * an event in X direction
> - * @ev_src_ye: bit in event source register that indicates
> - * an event in Y direction
> - * @ev_src_ze: bit in event source register that indicates
> - * an event in Z direction
> - * @ev_ths: event threshold register address
> - * @ev_ths_mask: mask for the threshold value
> - * @ev_count: event count (period) register address
> - *
> - * Since not all chips supported by the driver support comparing high
> pass
> - * filtered data for events (interrupts), different interrupt sources
> are
> - * used for different chips and the relevant registers are included
> here.
> */
> struct mma_chip_info {
> u8 chip_id;
> const struct iio_chan_spec *channels;
> int num_channels;
> const int mma_scales[3][2];
> - u8 ev_cfg;
> - u8 ev_cfg_ele;
> - u8 ev_cfg_chan_shift;
> - u8 ev_src;
> - u8 ev_src_xe;
> - u8 ev_src_ye;
> - u8 ev_src_ze;
> - u8 ev_ths;
> - u8 ev_ths_mask;
> - u8 ev_count;
> };
>
> enum {
> @@ -602,9 +613,8 @@ static int mma8452_set_power_mode(struct
> mma8452_data *data, u8 mode)
> static int mma8452_freefall_mode_enabled(struct mma8452_data *data)
> {
> int val;
> - const struct mma_chip_info *chip = data->chip_info;
>
> - val = i2c_smbus_read_byte_data(data->client, chip->ev_cfg);
> + val = i2c_smbus_read_byte_data(data->client, MMA8452_FF_MT_CFG);
> if (val < 0)
> return val;
>
> @@ -614,29 +624,28 @@ static int mma8452_freefall_mode_enabled(struct
> mma8452_data *data)
> static int mma8452_set_freefall_mode(struct mma8452_data *data, bool
> state)
> {
> int val;
> - const struct mma_chip_info *chip = data->chip_info;
>
> if ((state && mma8452_freefall_mode_enabled(data)) ||
> (!state && !(mma8452_freefall_mode_enabled(data))))
> return 0;
>
> - val = i2c_smbus_read_byte_data(data->client, chip->ev_cfg);
> + val = i2c_smbus_read_byte_data(data->client, MMA8452_FF_MT_CFG);
> if (val < 0)
> return val;
>
> if (state) {
> - val |= BIT(idx_x + chip->ev_cfg_chan_shift);
> - val |= BIT(idx_y + chip->ev_cfg_chan_shift);
> - val |= BIT(idx_z + chip->ev_cfg_chan_shift);
> + val |= BIT(idx_x + MMA8452_FF_MT_CHAN_SHIFT);
> + val |= BIT(idx_y + MMA8452_FF_MT_CHAN_SHIFT);
> + val |= BIT(idx_z + MMA8452_FF_MT_CHAN_SHIFT);
> val &= ~MMA8452_FF_MT_CFG_OAE;
> } else {
> - val &= ~BIT(idx_x + chip->ev_cfg_chan_shift);
> - val &= ~BIT(idx_y + chip->ev_cfg_chan_shift);
> - val &= ~BIT(idx_z + chip->ev_cfg_chan_shift);
> + val &= ~BIT(idx_x + MMA8452_FF_MT_CHAN_SHIFT);
> + val &= ~BIT(idx_y + MMA8452_FF_MT_CHAN_SHIFT);
> + val &= ~BIT(idx_z + MMA8452_FF_MT_CHAN_SHIFT);
> val |= MMA8452_FF_MT_CFG_OAE;
> }
>
> - return mma8452_change_config(data, chip->ev_cfg, val);
> + return mma8452_change_config(data, MMA8452_FF_MT_CFG, val);
> }
>
> static int mma8452_set_hp_filter_frequency(struct mma8452_data *data,
> @@ -740,6 +749,28 @@ static int mma8452_write_raw(struct iio_dev
> *indio_dev,
> return ret;
> }
>
> +static int mma8452_get_event_regs(const struct iio_chan_spec *chan,
> + enum iio_event_direction dir, const struct mma8452_event_regs
> **ev_reg)
> +{
> + if (!chan)
> + return -EINVAL;
> + switch (chan->type) {
> + case IIO_ACCEL:
> + switch (dir) {
> + case IIO_EV_DIR_FALLING:
> + *ev_reg = &ev_regs_accel_falling;
> + return 0;
> + case IIO_EV_DIR_RISING:
> + *ev_reg = &ev_regs_accel_rising;
> + return 0;
> + default:
> + return -EINVAL;
> + }
> + default:
> + return -EINVAL;
> + }
> +}
> +
> static int mma8452_read_thresh(struct iio_dev *indio_dev,
> const struct iio_chan_spec *chan,
> enum iio_event_type type,
> @@ -749,21 +780,23 @@ static int mma8452_read_thresh(struct iio_dev
> *indio_dev,
> {
> struct mma8452_data *data = iio_priv(indio_dev);
> int ret, us, power_mode;
> + const struct mma8452_event_regs *ev_regs;
>
> + ret = mma8452_get_event_regs(chan, dir, &ev_regs);
> + if (ret)
> + return ret;
> switch (info) {
> case IIO_EV_INFO_VALUE:
> - ret = i2c_smbus_read_byte_data(data->client,
> - data->chip_info->ev_ths);
> + ret = i2c_smbus_read_byte_data(data->client, ev_regs->ev_ths);
> if (ret < 0)
> return ret;
>
> - *val = ret & data->chip_info->ev_ths_mask;
> + *val = ret & ev_regs->ev_ths_mask;
>
> return IIO_VAL_INT;
>
> case IIO_EV_INFO_PERIOD:
> - ret = i2c_smbus_read_byte_data(data->client,
> - data->chip_info->ev_count);
> + ret = i2c_smbus_read_byte_data(data->client, ev_regs->ev_count);
> if (ret < 0)
> return ret;
>
> @@ -809,14 +842,18 @@ static int mma8452_write_thresh(struct iio_dev
> *indio_dev,
> {
> struct mma8452_data *data = iio_priv(indio_dev);
> int ret, reg, steps;
> + const struct mma8452_event_regs *ev_regs;
> +
> + ret = mma8452_get_event_regs(chan, dir, &ev_regs);
> + if (ret)
> + return ret;
>
> switch (info) {
> case IIO_EV_INFO_VALUE:
> - if (val < 0 || val > MMA8452_TRANSIENT_THS_MASK)
> + if (val < 0 || val > ev_regs->ev_ths_mask)
> return -EINVAL;
>
> - return mma8452_change_config(data, data->chip_info->ev_ths,
> - val);
> + return mma8452_change_config(data, ev_regs->ev_ths, val);
>
> case IIO_EV_INFO_PERIOD:
> ret = mma8452_get_power_mode(data);
> @@ -830,8 +867,7 @@ static int mma8452_write_thresh(struct iio_dev
> *indio_dev,
> if (steps < 0 || steps > 0xff)
> return -EINVAL;
>
> - return mma8452_change_config(data, data->chip_info->ev_count,
> - steps);
> + return mma8452_change_config(data, ev_regs->ev_count, steps);
>
> case IIO_EV_INFO_HIGH_PASS_FILTER_3DB:
> reg = i2c_smbus_read_byte_data(data->client,
> @@ -861,23 +897,18 @@ static int mma8452_read_event_config(struct
> iio_dev *indio_dev,
> enum iio_event_direction dir)
> {
> struct mma8452_data *data = iio_priv(indio_dev);
> - const struct mma_chip_info *chip = data->chip_info;
> int ret;
>
> switch (dir) {
> case IIO_EV_DIR_FALLING:
> return mma8452_freefall_mode_enabled(data);
> case IIO_EV_DIR_RISING:
> - if (mma8452_freefall_mode_enabled(data))
> - return 0;
> -
> - ret = i2c_smbus_read_byte_data(data->client,
> - data->chip_info->ev_cfg);
> + ret = i2c_smbus_read_byte_data(data->client, MMA8452_TRANSIENT_CFG);
> if (ret < 0)
> return ret;
>
> - return !!(ret & BIT(chan->scan_index +
> - chip->ev_cfg_chan_shift));
> + return !!(ret & MMA8452_TRANSIENT_CFG_CHAN(chan->scan_index));
> +
> default:
> return -EINVAL;
> }
There are chips that don't have transient event registers at all. See
below.
> @@ -890,7 +921,6 @@ static int mma8452_write_event_config(struct
> iio_dev *indio_dev,
> int state)
> {
> struct mma8452_data *data = iio_priv(indio_dev);
> - const struct mma_chip_info *chip = data->chip_info;
> int val, ret;
>
> ret = mma8452_set_runtime_pm_state(data->client, state);
> @@ -901,28 +931,18 @@ static int mma8452_write_event_config(struct
> iio_dev *indio_dev,
> case IIO_EV_DIR_FALLING:
> return mma8452_set_freefall_mode(data, state);
> case IIO_EV_DIR_RISING:
> - val = i2c_smbus_read_byte_data(data->client, chip->ev_cfg);
> + val = i2c_smbus_read_byte_data(data->client, MMA8452_TRANSIENT_CFG);
> if (val < 0)
> return val;
>
> - if (state) {
> - if (mma8452_freefall_mode_enabled(data)) {
> - val &= ~BIT(idx_x + chip->ev_cfg_chan_shift);
> - val &= ~BIT(idx_y + chip->ev_cfg_chan_shift);
> - val &= ~BIT(idx_z + chip->ev_cfg_chan_shift);
> - val |= MMA8452_FF_MT_CFG_OAE;
> - }
> - val |= BIT(chan->scan_index + chip->ev_cfg_chan_shift);
> - } else {
> - if (mma8452_freefall_mode_enabled(data))
> - return 0;
> -
> - val &= ~BIT(chan->scan_index + chip->ev_cfg_chan_shift);
> - }
> + if (state)
> + val |= MMA8452_TRANSIENT_CFG_CHAN(chan->scan_index);
> + else
> + val &= ~MMA8452_TRANSIENT_CFG_CHAN(chan->scan_index);
>
> - val |= chip->ev_cfg_ele;
> + val |= MMA8452_TRANSIENT_CFG_ELE;
>
> - return mma8452_change_config(data, chip->ev_cfg, val);
> + return mma8452_change_config(data, MMA8452_TRANSIENT_CFG, val);
> default:
> return -EINVAL;
> }
> @@ -934,35 +954,25 @@ static void mma8452_transient_interrupt(struct
> iio_dev *indio_dev)
> s64 ts = iio_get_time_ns(indio_dev);
> int src;
>
> - src = i2c_smbus_read_byte_data(data->client,
> data->chip_info->ev_src);
> + src = i2c_smbus_read_byte_data(data->client, MMA8452_TRANSIENT_SRC);
> if (src < 0)
> return;
>
> - if (mma8452_freefall_mode_enabled(data)) {
> - iio_push_event(indio_dev,
> - IIO_MOD_EVENT_CODE(IIO_ACCEL, 0,
> - IIO_MOD_X_AND_Y_AND_Z,
> - IIO_EV_TYPE_MAG,
> - IIO_EV_DIR_FALLING),
> - ts);
> - return;
> - }
> -
> - if (src & data->chip_info->ev_src_xe)
> + if (src & MMA8452_TRANSIENT_SRC_XTRANSE)
> iio_push_event(indio_dev,
> IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X,
> IIO_EV_TYPE_MAG,
> IIO_EV_DIR_RISING),
> ts);
>
> - if (src & data->chip_info->ev_src_ye)
> + if (src & MMA8452_TRANSIENT_SRC_YTRANSE)
> iio_push_event(indio_dev,
> IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_Y,
> IIO_EV_TYPE_MAG,
> IIO_EV_DIR_RISING),
> ts);
>
> - if (src & data->chip_info->ev_src_ze)
> + if (src & MMA8452_TRANSIENT_SRC_ZTRANSE)
> iio_push_event(indio_dev,
> IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_Z,
> IIO_EV_TYPE_MAG,
> @@ -974,23 +984,42 @@ static irqreturn_t mma8452_interrupt(int irq,
> void *p)
> {
> struct iio_dev *indio_dev = p;
> struct mma8452_data *data = iio_priv(indio_dev);
> - const struct mma_chip_info *chip = data->chip_info;
> int ret = IRQ_NONE;
> int src;
> + int enabled_interrupts;
>
> src = i2c_smbus_read_byte_data(data->client, MMA8452_INT_SRC);
> if (src < 0)
> return IRQ_NONE;
>
> + enabled_interrupts = i2c_smbus_read_byte_data(data->client,
> + MMA8452_CTRL_REG4);
> + if (enabled_interrupts < 0)
> + return enabled_interrupts;
> +
> + if (!(src & enabled_interrupts))
> + return IRQ_NONE;
> +
> if (src & MMA8452_INT_DRDY) {
> iio_trigger_poll_chained(indio_dev->trig);
> ret = IRQ_HANDLED;
> }
>
> - if ((src & MMA8452_INT_TRANS &&
> - chip->ev_src == MMA8452_TRANSIENT_SRC) ||
> - (src & MMA8452_INT_FF_MT &&
> - chip->ev_src == MMA8452_FF_MT_SRC)) {
> + if (src & MMA8452_INT_FF_MT) {
> + if (mma8452_freefall_mode_enabled(data)) {
> + s64 ts = iio_get_time_ns(indio_dev);
> +
> + iio_push_event(indio_dev,
> + IIO_MOD_EVENT_CODE(IIO_ACCEL, 0,
> + IIO_MOD_X_AND_Y_AND_Z,
> + IIO_EV_TYPE_MAG,
> + IIO_EV_DIR_FALLING),
> + ts);
> + }
> + ret = IRQ_HANDLED;
> + }
> +
> + if (src & MMA8452_INT_TRANS) {
> mma8452_transient_interrupt(indio_dev);
> ret = IRQ_HANDLED;
> }
> @@ -1222,96 +1251,36 @@ static const struct mma_chip_info
> mma_chip_info_table[] = {
> * g * N * 1000000 / 2048 for N = 2, 4, 8 and g=9.80665
> */
> .mma_scales = { {0, 2394}, {0, 4788}, {0, 9577} },
> - .ev_cfg = MMA8452_TRANSIENT_CFG,
> - .ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE,
> - .ev_cfg_chan_shift = 1,
> - .ev_src = MMA8452_TRANSIENT_SRC,
> - .ev_src_xe = MMA8452_TRANSIENT_SRC_XTRANSE,
> - .ev_src_ye = MMA8452_TRANSIENT_SRC_YTRANSE,
> - .ev_src_ze = MMA8452_TRANSIENT_SRC_ZTRANSE,
> - .ev_ths = MMA8452_TRANSIENT_THS,
> - .ev_ths_mask = MMA8452_TRANSIENT_THS_MASK,
> - .ev_count = MMA8452_TRANSIENT_COUNT,
> },
> [mma8452] = {
> .chip_id = MMA8452_DEVICE_ID,
> .channels = mma8452_channels,
> .num_channels = ARRAY_SIZE(mma8452_channels),
> .mma_scales = { {0, 9577}, {0, 19154}, {0, 38307} },
> - .ev_cfg = MMA8452_TRANSIENT_CFG,
> - .ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE,
> - .ev_cfg_chan_shift = 1,
> - .ev_src = MMA8452_TRANSIENT_SRC,
> - .ev_src_xe = MMA8452_TRANSIENT_SRC_XTRANSE,
> - .ev_src_ye = MMA8452_TRANSIENT_SRC_YTRANSE,
> - .ev_src_ze = MMA8452_TRANSIENT_SRC_ZTRANSE,
> - .ev_ths = MMA8452_TRANSIENT_THS,
> - .ev_ths_mask = MMA8452_TRANSIENT_THS_MASK,
> - .ev_count = MMA8452_TRANSIENT_COUNT,
> },
> [mma8453] = {
> .chip_id = MMA8453_DEVICE_ID,
> .channels = mma8453_channels,
> .num_channels = ARRAY_SIZE(mma8453_channels),
> .mma_scales = { {0, 38307}, {0, 76614}, {0, 153228} },
> - .ev_cfg = MMA8452_TRANSIENT_CFG,
> - .ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE,
> - .ev_cfg_chan_shift = 1,
> - .ev_src = MMA8452_TRANSIENT_SRC,
> - .ev_src_xe = MMA8452_TRANSIENT_SRC_XTRANSE,
> - .ev_src_ye = MMA8452_TRANSIENT_SRC_YTRANSE,
> - .ev_src_ze = MMA8452_TRANSIENT_SRC_ZTRANSE,
> - .ev_ths = MMA8452_TRANSIENT_THS,
> - .ev_ths_mask = MMA8452_TRANSIENT_THS_MASK,
> - .ev_count = MMA8452_TRANSIENT_COUNT,
> },
> [mma8652] = {
> .chip_id = MMA8652_DEVICE_ID,
> .channels = mma8652_channels,
> .num_channels = ARRAY_SIZE(mma8652_channels),
> .mma_scales = { {0, 9577}, {0, 19154}, {0, 38307} },
> - .ev_cfg = MMA8452_FF_MT_CFG,
> - .ev_cfg_ele = MMA8452_FF_MT_CFG_ELE,
> - .ev_cfg_chan_shift = 3,
> - .ev_src = MMA8452_FF_MT_SRC,
> - .ev_src_xe = MMA8452_FF_MT_SRC_XHE,
> - .ev_src_ye = MMA8452_FF_MT_SRC_YHE,
> - .ev_src_ze = MMA8452_FF_MT_SRC_ZHE,
> - .ev_ths = MMA8452_FF_MT_THS,
> - .ev_ths_mask = MMA8452_FF_MT_THS_MASK,
> - .ev_count = MMA8452_FF_MT_COUNT,
> },
> [mma8653] = {
> .chip_id = MMA8653_DEVICE_ID,
> .channels = mma8653_channels,
> .num_channels = ARRAY_SIZE(mma8653_channels),
> .mma_scales = { {0, 38307}, {0, 76614}, {0, 153228} },
> - .ev_cfg = MMA8452_FF_MT_CFG,
> - .ev_cfg_ele = MMA8452_FF_MT_CFG_ELE,
> - .ev_cfg_chan_shift = 3,
> - .ev_src = MMA8452_FF_MT_SRC,
> - .ev_src_xe = MMA8452_FF_MT_SRC_XHE,
> - .ev_src_ye = MMA8452_FF_MT_SRC_YHE,
> - .ev_src_ze = MMA8452_FF_MT_SRC_ZHE,
> - .ev_ths = MMA8452_FF_MT_THS,
> - .ev_ths_mask = MMA8452_FF_MT_THS_MASK,
> - .ev_count = MMA8452_FF_MT_COUNT,
Are you sure you don't break MMA8652FC and MMA8653FC? Those chips don't
have
transient event registers. Aren't you trying to use those registers
nevertheless in your
code above?
What I think about is:
If rising: use transient OR ff_mt device-dependent like before. But now
save it in a simple flag,
whether transient registers are available.
If falling: switch to ff_mt in any case. (fixing freefall for the
transient-devices)
But please explain if I missed something!
thanks
martin
> },
> [fxls8471] = {
> .chip_id = FXLS8471_DEVICE_ID,
> .channels = mma8451_channels,
> .num_channels = ARRAY_SIZE(mma8451_channels),
> .mma_scales = { {0, 2394}, {0, 4788}, {0, 9577} },
> - .ev_cfg = MMA8452_TRANSIENT_CFG,
> - .ev_cfg_ele = MMA8452_TRANSIENT_CFG_ELE,
> - .ev_cfg_chan_shift = 1,
> - .ev_src = MMA8452_TRANSIENT_SRC,
> - .ev_src_xe = MMA8452_TRANSIENT_SRC_XTRANSE,
> - .ev_src_ye = MMA8452_TRANSIENT_SRC_YTRANSE,
> - .ev_src_ze = MMA8452_TRANSIENT_SRC_ZTRANSE,
> - .ev_ths = MMA8452_TRANSIENT_THS,
> - .ev_ths_mask = MMA8452_TRANSIENT_THS_MASK,
> - .ev_count = MMA8452_TRANSIENT_COUNT,
> },
> };
Powered by blists - more mailing lists