spi: spidev_test: Cleaned hexadecimal dump

Signed-off-by: Adrian Remonda <adrianremonda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/spi/spidev_test.c b/Documentation/spi/spidev_test.c
index 3a2f9d59edabf9d7858a1fff178fc722971dafd3..9cb09184a3d6f86a646e2de7a28dd0c23da5b809 100644 (file)
--- a/Documentation/spi/spidev_test.c
+++ b/Documentation/spi/spidev_test.c
@@ -15,6 +15,7 @@
 #include <unistd.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <getopt.h>
 #include <fcntl.h>
 #include <sys/ioctl.h>
@@ -35,6 +36,33 @@ static uint8_t bits = 8;
 static uint32_t speed = 500000;
 static uint16_t delay;
 
+static void hex_dump(const void *src, size_t length, size_t line_size, char *prefix)
+{
+       int i = 0;
+       const unsigned char *address = src;
+       const unsigned char *line = address;
+       unsigned char c;
+
+       printf("%s | ", prefix);
+       while (length-- > 0) {
+               printf("%02X ", *address++);
+               if (!(++i % line_size) || (length == 0 && i % line_size)) {
+                       if (length == 0) {
+                               while (i++ % line_size)
+                                       printf("__ ");
+                       }
+                       printf(" | ");  /* right close */
+                       while (line < address) {
+                               c = *line++;
+                               printf("%c", (c < 33 || c == 255) ? 0x2E : c);
+                       }
+                       printf("\n");
+                       if (length > 0)
+                               printf("%s | ", prefix);
+               }
+       }
+}
+
 static void transfer(int fd)
 {
        int ret;
@@ -76,12 +104,7 @@ static void transfer(int fd)
        if (ret < 1)
                pabort("can't send spi message");
 
-       for (ret = 0; ret < ARRAY_SIZE(tx); ret++) {
-               if (!(ret % 6))
-                       puts("");
-               printf("%.2X ", rx[ret]);
-       }
-       puts("");
+       hex_dump(rx, ARRAY_SIZE(rx), 32, "RX");
 }
 
 static void print_usage(const char *prog)