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authorHeiko Stuebner <heiko@sntech.de>2014-10-15 10:23:01 -0700
committerHeiko Stuebner <heiko@sntech.de>2014-11-05 22:18:36 +0100
commit6de2d21adaf05b7a456077625b6e311feabd3718 (patch)
tree2e49cd6325051c13dd43e21652f9a8362581c308 /arch/arm/mach-rockchip
parentd003b58c8389d596e9fc6a131fc2901e3d039343 (diff)
downloadlinux-6de2d21adaf05b7a456077625b6e311feabd3718.tar.bz2
ARM: rockchip: add option to access the pmu via a phandle in smp_operations
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: Kever Yang <kever.yang@rock-chips.com> Tested-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Diffstat (limited to 'arch/arm/mach-rockchip')
-rw-r--r--arch/arm/mach-rockchip/platsmp.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm/mach-rockchip/platsmp.c b/arch/arm/mach-rockchip/platsmp.c
index 4c36fbf99afb..57b53b32e103 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;