add "hvupdi_variant" property to avrdude.conf

src/avrdude.conf.in

@@ -17118,6 +17118,8 @@ part parent    ".avr8x"
     id			       = ".avr8x_tiny";
     desc		       = "AVR8X tiny family common values";
     family_id      = "tinyAVR";
+    # Shared UPDI pin, HV on UPDI pin
+    hvupdi_variant = 0;
 
     memory "userrow"
         size	  	= 0x20;
@@ -17139,6 +17141,8 @@ part parent    ".avr8x"
     id			       = ".avr8x_mega";
     desc		       = "AVR8X mega family common values";
     family_id	     = "megaAVR";
+    # Dedicated UPDI pin, no HV
+    hvupdi_variant = 1;
 
     memory "userrow"
         size		  = 0x40;
@@ -18245,6 +18249,8 @@ part
     has_updi       = yes;
     nvm_base       = 0x1000;
     ocd_base       = 0x0F80;
+    # Dedicated UPDI pin, no HV
+    hvupdi_variant = 1;
 
     memory "signature"
         size		= 3;
@@ -19213,6 +19219,8 @@ part parent    ".avrdx"
 part parent ".avrdx"
     id			       = ".avrex";
     desc		       = "AVR-Ex family common values";
+    # Shared UPDI pin, HV on _RESET
+    hvupdi_variant = 2;
 
     memory "userrow"
         size      = 0x40;

src/config_gram.y

@@ -81,6 +81,7 @@ static int pin_name;
 %token K_DEFAULT_SERIAL
 %token K_DESC
 %token K_FAMILY_ID
+%token K_HVUPDI_VARIANT
 %token K_DEVICECODE
 %token K_STK500_DEVCODE
 %token K_AVR910_DEVCODE
@@ -676,6 +677,12 @@ part_parm :
       free_token($3);
     } |
 
+  K_HVUPDI_VARIANT TKN_EQUAL TKN_NUMBER
+    {
+      current_part->hvupdi_variant = $3->value.number;
+      free_token($3);
+    } |
+
   K_DEVICECODE TKN_EQUAL TKN_NUMBER {
     {
       yyerror("devicecode is deprecated, use "

src/lexer.l

@@ -159,6 +159,7 @@ hventerstabdelay { yylval=NULL; return K_HVENTERSTABDELAY; }
 hvleavestabdelay { yylval=NULL; return K_HVLEAVESTABDELAY; }
 hvsp_controlstack  { yylval=NULL; return K_HVSP_CONTROLSTACK; }
 hvspcmdexedelay  { yylval=NULL; return K_HVSPCMDEXEDELAY; }
+hvupdi_variant   { yylval=NULL; return K_HVUPDI_VARIANT; }
 id               { yylval=NULL; return K_ID; }
 idr              { yylval=NULL; return K_IDR; }
 io               { yylval=new_token(K_IO); return K_IO; }

src/libavrdude.h

@@ -202,6 +202,7 @@ typedef struct avrpart {
   char          desc[AVR_DESCLEN];  /* long part name */
   char          id[AVR_IDLEN];      /* short part name */
   char          family_id[AVR_FAMILYIDLEN+1]; /* family id in the SIB (avr8x) */
+  int           hvupdi_variant;     /* 12V pulse on UPDI pin, no pin or RESET pin */
   int           stk500_devcode;     /* stk500 device code */
   int           avr910_devcode;     /* avr910 device code */
   int           chip_erase_delay;   /* microseconds */