linux.git/drivers/spi/spi-loopback-test.c, branch v4.16

spi: loopback-test: implement testing with no CS

2017-07-26T12:08:56+00:00

To run spi-loopback-tests on HW without modifications, we need to
disable Chip Select. This should avoid surprising side effects for
SPI devices by testing patterns.

Signed-off-by: Oleksij Rempel 
Signed-off-by: Mark Brown

spi: loopback-test: make several module parameters static

2017-07-18T13:10:01+00:00

Several module parameters are local to the source, so make them
static. Cleans up several sparse warnings such as:

"symbol 'loop_req' was not declared. Should it be static?"

Signed-off-by: Colin Ian King 
Signed-off-by: Mark Brown

spi: loopback-test: provide loop_req option.

2017-07-17T14:27:26+00:00

Provide a module parameter to request internal loop by the SPI master
controller.
This should make loop testing easier without extra HW modification.

For test automation a logic analyzer is recommended for host
controller-independent verification.
An example test rig configuration and procedure:
  i.MX6S RIoRBoard           Logic Analyzer
  -----------------------------------------
  (J13  4) GND ------------- GND
  (J13  6) CSPI3-CLK ------> PIN 3
  (J13  8) CSPI3-MOSI <----- PIN 2
     ^ - internal loop configured by SPI_LOOP
     |   or can be user external jamper.
  (J13 10) CSPI3-MISO -----> PIN 1

grab some data and decode it:
sigrok-cli -d fx2lafw --time 160000 --config samplerate=10m  \
  --channels 0-2 -o dump.sr
sigrok-cli -i dump.sr -P spi:mosi=1:clk=2 > result_for_regression_tests

Signed-off-by: Oleksij Rempel 
Signed-off-by: Mark Brown

spi: loopback-test: Fix kfree() NULL pointer error.

2017-06-28T19:16:41+00:00

Here, rx/tx allocation can fail. So avoid kvfree call
with NULL pointer.

Signed-off-by: Arvind Yadav 
Signed-off-by: Mark Brown

spi: loopback-test: fix spelling mistake: "reruning" -> "rerunning"

2017-06-28T19:03:09+00:00

trivial fix to spelling mistake in dev_info error message

Signed-off-by: Colin Ian King 
Signed-off-by: Mark Brown

Merge remote-tracking branches 'spi/topic/spidev', 'spi/topic/spidev-test', 'spi/topic/sunxi', 'spi/topic/tegra' and 'spi/topic/test' into spi-next

2017-04-26T14:58:16+00:00

spi: loopback-test: fix spelling mistake: "minimam" -> "minimum"

2017-03-30T10:15:53+00:00

trivial fix to spelling mistake in dev_err error message

Signed-off-by: Colin Ian King 
Signed-off-by: Mark Brown

spi: loopback-test: fix potential integer overflow on multiple

2017-03-20T16:11:39+00:00

A multiplication of 8U * xfer-len with the type of a 32 bit unsigned int
is evaluated using 32 bit arithmetic and then used in a context that
expects an expression of type unsigned long long (64 bits).  Avoid any
potential overflow by casting BITS_PER_BYTE to unsigned long long.

Detected by CoverityScan, CID#1419691 ("Unintentional integer overflow")

Fixes: ea9936f324356 ("spi: loopback-test: add elapsed time check")
Signed-off-by: Colin Ian King 
Signed-off-by: Mark Brown

spi: loopback-test: add test spi_message with delay after transfers

2017-03-17T21:54:12+00:00

This adds a new test to check whether the spi_transfer.delay_usecs
setting has properly taken effect.

Signed-off-by: Akinobu Mita 
Signed-off-by: Mark Brown

spi: loopback-test: add elapsed time check

2017-03-17T21:54:08+00:00

This adds checks whether the elapsed time is longer than the minimam
estimated time.  The estimated time is calculated with the total
transfer length per clock rate and optional spi_transfer.delay_usecs.

Signed-off-by: Akinobu Mita 
Signed-off-by: Mark Brown