software/liblitedram/sdram: keep sdrwlon/sdrwloff private.

litex/soc/software/bios/cmds/cmd_litedram.c

@@ -24,26 +24,6 @@
 define_command(sdrinit, sdrinit, "Start SDRAM initialisation", LITEDRAM_CMDS);
 #endif
 
-/**
- * Command "sdrwlon"
- *
- * Write leveling ON
- *
- */
-#if defined(CSR_DDRPHY_BASE) && defined(SDRAM_PHY_WRITE_LEVELING_CAPABLE) && defined(CSR_SDRAM_BASE)
-define_command(sdrwlon, sdrwlon, "Enable write leveling", LITEDRAM_CMDS);
-#endif
-
-/**
- * Command "sdrwloff"
- *
- * Write leveling OFF
- *
- */
-#if defined(CSR_DDRPHY_BASE) && defined(SDRAM_PHY_WRITE_LEVELING_CAPABLE) && defined(CSR_SDRAM_BASE)
-define_command(sdrwloff, sdrwloff, "Disable write leveling", LITEDRAM_CMDS);
-#endif
-
 /**
  * Command "sdrlevel"
  *

litex/soc/software/liblitedram/sdram.c

@@ -91,7 +91,7 @@ void sdrhw(void)
 
 int sdrwl_delays[16];
 
-void sdrwlon(void)
+static void sdrwlon(void)
 {
 	sdram_dfii_pi0_address_write(DDRX_MR1 | (1 << 7));
 	sdram_dfii_pi0_baddress_write(1);
@@ -106,7 +106,7 @@ void sdrwlon(void)
 	ddrphy_wlevel_en_write(1);
 }
 
-void sdrwloff(void)
+static void sdrwloff(void)
 {
 	sdram_dfii_pi0_address_write(DDRX_MR1);
 	sdram_dfii_pi0_baddress_write(1);

litex/soc/software/liblitedram/sdram.h

@@ -20,9 +20,6 @@ void sdrhw(void);
 /*-----------------------------------------------------------------------*/
 /* Write Leveling                                                        */
 /*-----------------------------------------------------------------------*/
-
-void sdrwlon(void);
-void sdrwloff(void);
 int write_level(void);
 
 /*-----------------------------------------------------------------------*/