[U-Boot] [PATCH v6 13/15] tegra: Set CNTFRQ for secondary CPUs

[Jan Kiszka]

We only set CNTFRQ in arch_timer_init for the boot CPU. But this has to
happen for all cores.

Fixing this resolves problems of KVM with emulating the generic
timer/counter.

Signed-off-by: Jan Kiszka <jan.kiszka at siemens.com>
Reviewed-by: Tom Rini <trini at konsulko.com>
Reviewed-by: Thierry Reding <treding at nvidia.com>
Tested-by: Thierry Reding <treding at nvidia.com>
Tested-by: Ian Campbell <ijc at hellion.org.uk>
---
 arch/arm/mach-tegra/psci.S | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm/mach-tegra/psci.S b/arch/arm/mach-tegra/psci.S
index e4733e6..b836da1 100644
--- a/arch/arm/mach-tegra/psci.S
+++ b/arch/arm/mach-tegra/psci.S
@@ -51,12 +51,25 @@ ENTRY(psci_arch_init)
 	str	r5, [r4]
 
 	bl	psci_get_cpu_id		@ CPU ID => r0
+
+	adr	r5, _sys_clock_freq
+	cmp	r0, #0
+
+	mrceq	p15, 0, r7, c14, c0, 0	@ read CNTFRQ from CPU0
+	streq	r7, [r5]
+
+	ldrne	r7, [r5]
+	mcrne	p15, 0, r7, c14, c0, 0	@ write CNTFRQ to CPU1..3
+
 	bl	psci_get_cpu_stack_top	@ stack top => r0
 	mov	sp, r0
 
 	bx	r6
 ENDPROC(psci_arch_init)
 
+_sys_clock_freq:
+	.word	0
+
 ENTRY(psci_cpu_off)
 	bl	psci_cpu_off_common
 
-- 
2.1.4