PR #816 merged

Copy over man page additions into texinfo file as well.

NEWS

@@ -105,6 +105,7 @@ Changes since version 6.4:
     - jtagmkii: Reduce the number of sync attempts to 10 + print
       number of attempts #844
     - CMake: add initial support for installing lib and include files #829
+    - Add SPI support to USBtiny #816
 
   * Internals:
 

src/avrdude.1

@@ -1282,7 +1282,9 @@ This also applies to the STK500 and STK600 in parallel programming mode.
 .Pp
 The USBasp and USBtinyISP drivers do not offer any option to distinguish multiple
 devices connected simultaneously, so effectively only a single device
-is supported.  Slave Select must be externally held low for direct SPI when
+is supported.
+.Pp
+Slave Select must be externally held low for direct SPI when
 using USBtinyISP, and send must be a multiple of four bytes.
 .Pp
 The avrftdi driver allows one to select specific devices using any combination of vid,pid

src/doc/avrdude.texi

@@ -1309,7 +1309,9 @@ Display the device signature bytes.
 
 @item spi
 Enter direct SPI mode.  The @emph{pgmled} pin acts as slave select.
-@emph{Only supported on parallel bitbang programmers.}
+@emph{Only supported on parallel bitbang programmers, and partially by USBtiny.}
+Slave Select must be externally held low for direct SPI when
+using USBtinyISP, and send must be a multiple of four bytes.
 
 @item part
 Display the current part settings and parameters.  Includes chip