Blackfin: workaround anomaly 05000440

We cannot rely on the syscontrol rom func to program PLL_DIV with anomaly
05000440 is in effect, so manually program the MMR when necessary.

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

diff --git a/arch/blackfin/cpu/initcode.c b/arch/blackfin/cpu/initcode.c
index 007f5ce..433d477 100644 (file)
--- a/arch/blackfin/cpu/initcode.c
+++ b/arch/blackfin/cpu/initcode.c
@@ -391,7 +391,9 @@ program_clocks(ADI_BOOT_DATA *bs, bool put_into_srfs)
 
                /* Always programming PLL_LOCKCNT avoids Anomaly 05000430 */
                ADI_SYSCTRL_VALUES memory_settings;
-               uint32_t actions = SYSCTRL_WRITE | SYSCTRL_PLLCTL | SYSCTRL_PLLDIV | SYSCTRL_LOCKCNT;
+               uint32_t actions = SYSCTRL_WRITE | SYSCTRL_PLLCTL | SYSCTRL_LOCKCNT;
+               if (!ANOMALY_05000440)
+                       actions |= SYSCTRL_PLLDIV;
                if (CONFIG_HAS_VR) {
                        actions |= SYSCTRL_VRCTL;
                        if (CONFIG_VR_CTL_VAL & FREQ_MASK)
@@ -410,6 +412,8 @@ program_clocks(ADI_BOOT_DATA *bs, bool put_into_srfs)
                serial_putc('e');
                bfrom_SysControl(actions, &memory_settings, NULL);
                serial_putc('f');
+               if (ANOMALY_05000440)
+                       bfin_write_PLL_DIV(CONFIG_PLL_DIV_VAL);
 #if ANOMALY_05000432
                bfin_write_SIC_IWR1(-1);
 #endif