Support setting the word delay using the -w/--word-delay command line
parameter. Note that spidev exposes word delay only as an u8, allowing
for a maximum of 255us of delay to be inserted.

Signed-off-by: Jonas Rebmann <jre@pengutronix.de>
---
 tools/spi/spidev_test.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/spi/spidev_test.c b/tools/spi/spidev_test.c
index 9179942d7f15ceb5cab17477d950800f545b6ab4..f2135d619a0bb4aa3eff830af0f2114ad9991cc5 100644
--- a/tools/spi/spidev_test.c
+++ b/tools/spi/spidev_test.c
@@ -42,6 +42,7 @@ static char *input_file;
 static char *output_file;
 static uint32_t speed = 500000;
 static uint16_t delay;
+static uint16_t word_delay;
 static int verbose;
 static int transfer_size;
 static int iterations;
@@ -124,6 +125,7 @@ static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len)
 		.rx_buf = (unsigned long)rx,
 		.len = len,
 		.delay_usecs = delay,
+		.word_delay_usecs = word_delay,
 		.speed_hz = speed,
 		.bits_per_word = bits,
 	};
@@ -172,11 +174,12 @@ static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len)
 
 static void print_usage(const char *prog)
 {
-	printf("Usage: %s [-2348CDFHILMNORSZbdilopsv]\n", prog);
+	printf("Usage: %s [-2348CDFHILMNORSZbdilopsvw]\n", prog);
 	puts("general device settings:\n"
 		 "  -D --device         device to use (default /dev/spidev1.1)\n"
 		 "  -s --speed          max speed (Hz)\n"
 		 "  -d --delay          delay (usec)\n"
+		 "  -w --word-delay     word delay (usec)\n"
 		 "  -l --loop           loopback\n"
 		 "spi mode:\n"
 		 "  -H --cpha           clock phase\n"
@@ -213,6 +216,7 @@ static void parse_opts(int argc, char *argv[])
 			{ "device",        1, 0, 'D' },
 			{ "speed",         1, 0, 's' },
 			{ "delay",         1, 0, 'd' },
+			{ "word-delay",    1, 0, 'w' },
 			{ "loop",          0, 0, 'l' },
 			{ "cpha",          0, 0, 'H' },
 			{ "cpol",          0, 0, 'O' },
@@ -237,7 +241,7 @@ static void parse_opts(int argc, char *argv[])
 		};
 		int c;
 
-		c = getopt_long(argc, argv, "D:s:d:b:i:o:lHOLC3ZFMNR248p:vS:I:",
+		c = getopt_long(argc, argv, "D:s:d:w:b:i:o:lHOLC3ZFMNR248p:vS:I:",
 				lopts, NULL);
 
 		if (c == -1)
@@ -253,6 +257,9 @@ static void parse_opts(int argc, char *argv[])
 		case 'd':
 			delay = atoi(optarg);
 			break;
+		case 'w':
+			word_delay = atoi(optarg);
+			break;
 		case 'b':
 			bits = atoi(optarg);
 			break;

---
base-commit: 9852d85ec9d492ebef56dc5f229416c925758edc
change-id: 20241107-spidev-test-word-delay-1abab23743ab

Best regards,
-- 
Jonas Rebmann <jre@pengutronix.de>

On Thu, 07 Nov 2024 16:07:31 +0100, Jonas Rebmann wrote:
> Support setting the word delay using the -w/--word-delay command line
> parameter. Note that spidev exposes word delay only as an u8, allowing
> for a maximum of 255us of delay to be inserted.
> 
> 

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next

Thanks!

[1/1] spi: spidev_test: add support for word delay
      commit: 3ec83a377a995559c18880ff780a6873df9cc5d3

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark