The clock fix-up for tegra is still present in the code. It causes a divide-by-zero bug after relocation when chain-loading U-Boot from coreboot. Fix this by adding a check.
Signed-off-by: Simon Glass sjg@chromium.org Fixes: 7468676 (ARM: tegra: fix clock_get_periph_rate() for UART clocks) ---
Changes in v2: None
arch/arm/mach-tegra/clock.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-tegra/clock.c b/arch/arm/mach-tegra/clock.c index ce68c7d0cc..dc58b3027d 100644 --- a/arch/arm/mach-tegra/clock.c +++ b/arch/arm/mach-tegra/clock.c @@ -339,8 +339,11 @@ unsigned long clock_get_periph_rate(enum periph_id periph_id, * return value doesn't help. In summary this clock driver is * quite broken but I'm afraid I have no idea how to fix it * without completely replacing it. + * + * Be careful to avoid a divide by zero error. */ - div -= 2; + if (div >= 1) + div -= 2; break; #endif default: