From a508fbfed333aea05e4ac42d98803a031cda8ce8 Mon Sep 17 00:00:00 2001 From: Matti Vaittinen Date: Thu, 4 May 2023 10:58:52 +0300 Subject: [PATCH] iio: kx022a: Probe asynchronously Devices which may take a while to initialize during probe and which have no strong reason to probe synchronously can request asynchronous probing as default probe strategy. This can speed-up start times on some platforms. The KX022A gets probe delayed for at least two reasons. It enables the supply regulator, (which is likely to have ramp-up delay if it was disabled) and additionally it delays while the sensor itself is initializing. Changing to asynchronous probing may cause problems. Some of which are discussed in: https://lore.kernel.org/all/06db017f-e985-4434-8d1d-02ca2100cca0@sirena.org.uk/ Enable asynchronous probing for KX022A. Signed-off-by: Matti Vaittinen Link: https://lore.kernel.org/r/24cea76c282a28b7a4dba297ab627176f8097907.1683185765.git.mazziesaccount@gmail.com Signed-off-by: Jonathan Cameron --- drivers/iio/accel/kionix-kx022a-i2c.c | 1 + drivers/iio/accel/kionix-kx022a-spi.c | 1 + 2 files changed, 2 insertions(+) diff --git a/drivers/iio/accel/kionix-kx022a-i2c.c b/drivers/iio/accel/kionix-kx022a-i2c.c index e6fd02d..ee98220 100644 --- a/drivers/iio/accel/kionix-kx022a-i2c.c +++ b/drivers/iio/accel/kionix-kx022a-i2c.c @@ -40,6 +40,7 @@ static struct i2c_driver kx022a_i2c_driver = { .driver = { .name = "kx022a-i2c", .of_match_table = kx022a_of_match, + .probe_type = PROBE_PREFER_ASYNCHRONOUS, }, .probe_new = kx022a_i2c_probe, }; diff --git a/drivers/iio/accel/kionix-kx022a-spi.c b/drivers/iio/accel/kionix-kx022a-spi.c index 9cd047f7..f45a468 100644 --- a/drivers/iio/accel/kionix-kx022a-spi.c +++ b/drivers/iio/accel/kionix-kx022a-spi.c @@ -46,6 +46,7 @@ static struct spi_driver kx022a_spi_driver = { .driver = { .name = "kx022a-spi", .of_match_table = kx022a_of_match, + .probe_type = PROBE_PREFER_ASYNCHRONOUS, }, .probe = kx022a_spi_probe, .id_table = kx022a_id, -- 2.7.4