[PATCH v3 3/5] arm64: dts: Add support for Spreadtrum SC9836 SoC in dts and Makefile
From: catalin.marinas@arm.com (Catalin Marinas)
Date: 2014-11-28 14:29:44
Also in:
linux-api, linux-devicetree, linux-serial, lkml
Subsystem:
arm architected timer driver, clocksource, clockevent drivers, the rest · Maintainers:
Mark Rutland, Marc Zyngier, Daniel Lezcano, Thomas Gleixner, Linus Torvalds
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:quoted
On Thu, Nov 27, 2014 at 11:50:43AM +0000, Mark Rutland wrote:quoted
On Tue, Nov 25, 2014 at 12:16:56PM +0000, Chunyan Zhang wrote:quoted
+ + 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