Applied "spi: spidev_test: output to a file" to the spi tree

[Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

The patch

   spi: spidev_test: output to a file

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

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

>From 983b27886a3c7f6eff4e987ddba932da74703f4e Mon Sep 17 00:00:00 2001
From: Joshua Clayton <stillcompiling-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Date: Wed, 18 Nov 2015 14:30:40 -0800
Subject: [PATCH] spi: spidev_test: output to a file

For testing of larger data transfers, output unmodified data
directly to a file.

Signed-off-by: Joshua Clayton <stillcompiling-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Signed-off-by: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
---
 tools/spi/spidev_test.c | 26 +++++++++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)

diff --git a/tools/spi/spidev_test.c b/tools/spi/spidev_test.c
index 71a45a4d7d49..02fc3a44901b 100644
--- a/tools/spi/spidev_test.c
+++ b/tools/spi/spidev_test.c
@@ -35,6 +35,7 @@ static const char *device = "/dev/spidev1.1";
 static uint32_t mode;
 static uint8_t bits = 8;
 static char *input_file;
+static char *output_file;
 static uint32_t speed = 500000;
 static uint16_t delay;
 static int verbose;
@@ -105,7 +106,7 @@ static int unescape(char *_dst, char *_src, size_t len)
 static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len)
 {
 	int ret;
-
+	int out_fd;
 	struct spi_ioc_transfer tr = {
 		.tx_buf = (unsigned long)tx,
 		.rx_buf = (unsigned long)rx,
@@ -136,7 +137,21 @@ static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len)
 
 	if (verbose)
 		hex_dump(tx, len, 32, "TX");
-	hex_dump(rx, len, 32, "RX");
+
+	if (output_file) {
+		out_fd = open(output_file, O_WRONLY | O_CREAT | O_TRUNC, 0666);
+		if (out_fd < 0)
+			pabort("could not open output file");
+
+		ret = write(out_fd, rx, len);
+		if (ret != len)
+			pabort("not all bytes written to utput file");
+
+		close(out_fd);
+	}
+
+	if (verbose || !output_file)
+		hex_dump(rx, len, 32, "RX");
 }
 
 static void print_usage(const char *prog)
@@ -147,6 +162,7 @@ static void print_usage(const char *prog)
 	     "  -d --delay    delay (usec)\n"
 	     "  -b --bpw      bits per word \n"
 	     "  -i --input    input data from a file (e.g. \"test.bin\")\n"
+	     "  -o --output   output data to a file (e.g. \"results.bin\")\n"
 	     "  -l --loop     loopback\n"
 	     "  -H --cpha     clock phase\n"
 	     "  -O --cpol     clock polarity\n"
@@ -171,6 +187,7 @@ static void parse_opts(int argc, char *argv[])
 			{ "delay",   1, 0, 'd' },
 			{ "bpw",     1, 0, 'b' },
 			{ "input",   1, 0, 'i' },
+			{ "output",  1, 0, 'o' },
 			{ "loop",    0, 0, 'l' },
 			{ "cpha",    0, 0, 'H' },
 			{ "cpol",    0, 0, 'O' },
@@ -186,7 +203,7 @@ static void parse_opts(int argc, char *argv[])
 		};
 		int c;
 
-		c = getopt_long(argc, argv, "D:s:d:b:i:lHOLC3NR24p:v",
+		c = getopt_long(argc, argv, "D:s:d:b:i:o:lHOLC3NR24p:v",
 				lopts, NULL);
 
 		if (c == -1)
@@ -208,6 +225,9 @@ static void parse_opts(int argc, char *argv[])
 		case 'i':
 			input_file = optarg;
 			break;
+		case 'o':
+			output_file = optarg;
+			break;
 		case 'l':
 			mode |= SPI_LOOP;
 			break;
-- 
2.6.2

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