Makes it possible to define a rockchip,pmu phandle in the cpus node directly
referencing the pmu syscon instead of searching for specific compatible.
The old way of finding the pmu stays of course available.
Signed-off-by: Heiko Stuebner <heiko at sntech.de>
Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
---
Changes in v3:
- add this patch
Changes in v2: None
arch/arm/mach-rockchip/platsmp.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/arch/arm/mach-rockchip/platsmp.c b/arch/arm/mach-rockchip/platsmp.c
index 4c36fbf..57b53b3 100644
--- a/arch/arm/mach-rockchip/platsmp.c
+++ b/arch/arm/mach-rockchip/platsmp.c
@@ -155,6 +155,19 @@ static int __init rockchip_smp_prepare_pmu(void)
struct device_node *node;
void __iomem *pmu_base;
+ /*
+ * This function is only called via smp_ops->smp_prepare_cpu().
+ * That only happens if a "/cpus" device tree node exists
+ * and has an "enable-method" property that selects the SMP
+ * operations defined herein.
+ */
+ node = of_find_node_by_path("/cpus");
+
+ pmu = syscon_regmap_lookup_by_phandle(node, "rockchip,pmu");
+ of_node_put(node);
+ if (!IS_ERR(pmu))
+ return 0;
+
pmu = syscon_regmap_lookup_by_compatible("rockchip,rk3066-pmu");
if (!IS_ERR(pmu))
return 0;
--
1.9.1
