kernel/linux.git/include/linux/iio/imu, branch v5.7.4

iio: imu: adis: add a note better explaining state_lock

2020-03-08T17:28:51+00:00

The 'state_lock' mutex was renamed from 'txrx_lock' in a previous patch and is intended to be used by ADIS drivers to protect the state of devices during consecutive R/W ops. The initial patch that introduced this change did not do a good [well, any] job at explaining this. This patch adds a comment to the 'state_lock' better explaining it's use. Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron

iio: imu: adis: update 'adis_data' struct doc-string

2020-03-08T17:28:50+00:00

The doc-string has been neglected over time. This change updates it with all the missing info. Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron

iio: imu: adis: add doc-string for 'adis' struct

2020-03-08T17:28:46+00:00

This change adds a doc-string for the 'adis' struct. It details the fields and their roles. Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron

iio: imu: adis: add support product ID check in adis_initial_startup

2020-03-08T17:28:31+00:00

Each driver/chip that wants to validate it's product id, can now specify a 'prod_id_reg' and an expected 'prod_id' value. The 'prod_id' value is intentionally left 0 (uninitialized). There aren't (yet) any product IDs with value 0; this enforces that both 'prod_id_reg' and 'prod_id' are specified. At the very least, this routine validates that the SPI connection to the ADIS chip[s] works well. Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron

iio: imu: adis: Add self_test_reg variable

2020-03-08T17:28:30+00:00

This patch adds a dedicated self_test_reg variable. This is also a step to let new drivers make use of `adis_initial_startup()`. Some devices use MSG_CTRL reg to request a self_test command while others use the GLOB_CMD register. Signed-off-by: Nuno Sá Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron

iio: imu: adis: add unlocked __adis_initial_startup()

2020-03-08T17:28:29+00:00

This change splits the __adis_initial_startup() away from adis_initial_startup(). The unlocked version can be used in certain calls during probe, where races won't happen since the ADIS driver may not be registered yet with IIO. Signed-off-by: Nuno Sá Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron

iio: adis: Remove startup_delay

2020-01-12T11:34:13+00:00

All timeouts are now handled by a dedicated timeout struct. This variable is no longer needed. Signed-off-by: Nuno Sá Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron

iio: adis: Introduce timeouts structure

2020-01-12T11:34:12+00:00

The adis library only allows to define a `startup_delay` which for some devices is enough. However, other devices define different timeouts with significantly different timings which could lead to devices to not wait enough time or to wait a lot more than necessary (which is not efficient). This patch introduces a new timeout struct that must be passed into `adis_init()`. There are mainly, for now, three timeouts used. This is also an introductory patch with the goal of refactoring `adis_initial_startup()`. New driver's (eg: adis16480, adis16460) are replicating code for the device initial setup. With some changes (being this the first one) we can pass this to `adis_initial_startup()`. Signed-off-by: Nuno Sá Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron

iio: imu: adis: create an unlocked version of adis_reset()

2019-11-23T12:05:17+00:00

The reset routine may also be important to be protected by the state-lock and grouped with other operations, so create an unlocked version, so that this can be done. Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron

iio: imu: adis: create an unlocked version of adis_check_status()

2019-11-23T12:02:05+00:00

This one also gets re-used in certain operations, so it makes sense to have an unlocked version of this to group it with other reads/writes/operations to have a single lock for the whole state change. Signed-off-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron