ARM: shmobile: force enable of r8a7790 arch timer
Implement a SoC-specific timer init function for
r8a7790 that makes sure the architected timer
is started regardless of boot loader setting.
Signed-off-by: Magnus Damm <damm@opensource.se>
Tested-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
diff --git a/arch/arm/mach-shmobile/setup-r8a7790.c b/arch/arm/mach-shmobile/setup-r8a7790.c
index cfccf6c..49de2d5 100644
--- a/arch/arm/mach-shmobile/setup-r8a7790.c
+++ b/arch/arm/mach-shmobile/setup-r8a7790.c
@@ -118,6 +118,18 @@
r8a7790_register_irqc(0);
}
+void __init r8a7790_timer_init(void)
+{
+ void __iomem *cntcr;
+
+ /* make sure arch timer is started by setting bit 0 of CNTCT */
+ cntcr = ioremap(0xe6080000, PAGE_SIZE);
+ iowrite32(1, cntcr);
+ iounmap(cntcr);
+
+ shmobile_timer_init();
+}
+
#ifdef CONFIG_USE_OF
void __init r8a7790_add_standard_devices_dt(void)
{
@@ -132,7 +144,7 @@
DT_MACHINE_START(R8A7790_DT, "Generic R8A7790 (Flattened Device Tree)")
.init_irq = irqchip_init,
.init_machine = r8a7790_add_standard_devices_dt,
- .init_time = shmobile_timer_init,
+ .init_time = r8a7790_timer_init,
.dt_compat = r8a7790_boards_compat_dt,
MACHINE_END
#endif /* CONFIG_USE_OF */