[PATCH v3 3/5] arm64: dts: Add support for Spreadtrum SC9836 SoC in dts and Makefile

Catalin Marinas
2014-11-28T14:29:13Z

On Thu, Nov 27, 2014 at 01:43:09PM +0000, Mark Rutland wrote:
> On Thu, Nov 27, 2014 at 12:12:15PM +0000, Catalin Marinas wrote:
> > On Thu, Nov 27, 2014 at 11:50:43AM +0000, Mark Rutland wrote:
> > > On Tue, Nov 25, 2014 at 12:16:56PM +0000, Chunyan Zhang wrote:
> > > > +
> > > > + timer {
> > > > + compatible = "arm,armv8-timer";
> > > > + interrupts = <1 13 0xff01>,
> > > > + <1 14 0xff01>,
> > > > + <1 11 0xff01>,
> > > > + <1 10 0xff01>;
> > > > + clock-frequency = <26000000>;
> > >
> > > Please remove the clock-frequency property. Your FW should initialise
> > > CNTFRQ_EL0 on all CPUs (certainly PSCI 0.2 requires that you do this).
> >
> > Since this comes up regularly, I think we need a dev_warn() in the arch
> > timer driver when CONFIG_ARM64.
>
> I'll ack such a patch ;)

How rude would this be?

diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 2133f9d59d06..aaaf3433ccb9 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -371,7 +371,8 @@ arch_timer_detect_rate(void __iomem *cntbase, struct device_node *np)
return;

/* Try to determine the frequency from the device tree or CNTFRQ */
- if (of_property_read_u32(np, "clock-frequency", &arch_timer_rate)) {
+ if (IS_ENABLED(CONFIG_ARM64) ||
+ of_property_read_u32(np, "clock-frequency", &arch_timer_rate)) {
if (cntbase)
arch_timer_rate = readl_relaxed(cntbase + CNTFRQ);
else