Blackfin: add note about anomaly 05000242 being worked around

Document anomaly 05000242 workaround in source code.

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

diff --git a/arch/blackfin/mach-common/clocks-init.c b/arch/blackfin/mach-common/clocks-init.c
index 35393651359bfc004d996154fb7d8d2497e45b5b..ef6870e9eea6d37c4771cfbd73906d85ffe03dec 100644 (file)
--- a/arch/blackfin/mach-common/clocks-init.c
+++ b/arch/blackfin/mach-common/clocks-init.c
@@ -72,6 +72,7 @@ void init_clocks(void)
 #endif
        bfin_write_PLL_LOCKCNT(0x300);
        do_sync();
+       /* We always write PLL_CTL thus avoiding Anomaly 05000242 */
        bfin_write16(PLL_CTL, PLL_CTL_VAL);
        __asm__ __volatile__("IDLE;");
        bfin_write_PLL_DIV(CONFIG_CCLK_ACT_DIV | CONFIG_SCLK_DIV);