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Blackfin: workaround anomaly 05000440

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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>
This commit is contained in:
Mike Frysinger 2010-10-14 14:29:17 -04:00
parent e5d8984be6
commit 5641f34f8b
1 changed files with 5 additions and 1 deletions
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6
arch/blackfin/cpu/initcode.c
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@ -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