* linux_spi.c (linuxspi_open): ensure correct SPI mode is

Submitted by Lars Ollén:
set (submitted in the audit trail of patch #9816).




git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@1498 81a1dc3b-b13d-400b-aceb-764788c761c2

Author: dl8dtl

ChangeLog

@@ -1,3 +1,9 @@
+2021-11-27  Joerg Wunsch <[email protected]>
+
+	Submitted by Lars Ollén:
+	* linux_spi.c (linuxspi_open): ensure correct SPI mode is
+	set (submitted in the audit trail of patch #9816).
+
 2021-11-27  Joerg Wunsch <[email protected]>
 
 	* linuxspi.c: Use -B <bitclock> rather than -b <baudrate>

linuxspi.c

@@ -166,6 +166,13 @@ static int linuxspi_open(PROGRAMMER *pgm, char *port)
         return -1;
     }
 
+    uint32_t mode = SPI_MODE_0 | SPI_NO_CS;
+    ret = ioctl(fd_spidev, SPI_IOC_WR_MODE32, &mode);
+    if (ret == -1) {
+        avrdude_message(MSG_INFO, "%s: error: Unable to set SPI mode %0X on %s\n",
+                        progname, mode, spidev);
+        goto close_spidev;
+    }
     fd_gpiochip = open(gpiochip, 0);
     if (fd_gpiochip < 0) {
         avrdude_message(MSG_INFO, "\n%s error: Unable to open the gpiochip %s", progname, gpiochip);