Blackfin: do not program voltage regulator on parts that do not have one

Some newer Blackfins (like the BF51x) do not have an on-chip voltage
regulator, so do not attempt to program the memory as if it does.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/cpu/blackfin/initcode.c b/cpu/blackfin/initcode.c
index 1352fd6..bbc2fa5 100644 (file)
--- a/cpu/blackfin/initcode.c
+++ b/cpu/blackfin/initcode.c
@@ -203,6 +203,15 @@ static inline void serial_putc(char c)
 # define CONFIG_VR_CTL_VAL (CONFIG_VR_CTL_CLKBUF | CONFIG_VR_CTL_VLEV | CONFIG_VR_CTL_FREQ)
 #endif
 
+/* some parts do not have an on-chip voltage regulator */
+#if defined(__ADSPBF51x__)
+# define CONFIG_HAS_VR 0
+# undef CONFIG_VR_CTL_VAL
+# define CONFIG_VR_CTL_VAL 0
+#else
+# define CONFIG_HAS_VR 1
+#endif
+
 #ifndef EBIU_RSTCTL
 /* Blackfin with SDRAM */
 #ifndef CONFIG_EBIU_SDBCTL_VAL
@@ -302,15 +311,23 @@ void initcode(ADI_BOOT_DATA *bootstruct)
                serial_putc('S');
 
                ADI_SYSCTRL_VALUES memory_settings;
-               memory_settings.uwVrCtl = CONFIG_VR_CTL_VAL;
+               uint32_t actions = SYSCTRL_WRITE | SYSCTRL_PLLCTL | SYSCTRL_PLLDIV | SYSCTRL_LOCKCNT;
+               if (CONFIG_HAS_VR) {
+                       actions |= SYSCTRL_VRCTL;
+                       if (CONFIG_VR_CTL_VAL & FREQ_MASK)
+                               actions |= SYSCTRL_INTVOLTAGE;
+                       else
+                               actions |= SYSCTRL_EXTVOLTAGE;
+                       memory_settings.uwVrCtl = CONFIG_VR_CTL_VAL;
+               } else
+                       actions |= SYSCTRL_EXTVOLTAGE;
                memory_settings.uwPllCtl = CONFIG_PLL_CTL_VAL;
                memory_settings.uwPllDiv = CONFIG_PLL_DIV_VAL;
                memory_settings.uwPllLockCnt = CONFIG_PLL_LOCKCNT_VAL;
 #if ANOMALY_05000432
                bfin_write_SIC_IWR1(0);
 #endif
-               syscontrol(SYSCTRL_WRITE | SYSCTRL_VRCTL | SYSCTRL_PLLCTL | SYSCTRL_PLLDIV | SYSCTRL_LOCKCNT |
-                       (CONFIG_VR_CTL_VAL & FREQ_MASK ? SYSCTRL_INTVOLTAGE : SYSCTRL_EXTVOLTAGE), &memory_settings, NULL);
+               bfrom_SysControl(actions, &memory_settings, NULL);
 #if ANOMALY_05000432
                bfin_write_SIC_IWR1(-1);
 #endif