From 5641f34f8b83b3dcb64ba5f6c0f83d2204c41387 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Thu, 14 Oct 2010 14:29:17 -0400
Subject: [PATCH] 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>
---
arch/blackfin/cpu/initcode.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/blackfin/cpu/initcode.c b/arch/blackfin/cpu/initcode.c
index 007f5ce775..433d477ddf 100644
--- 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
--
2.39.5