[PATCH v3 3/6] ARM: rockchip: add option to access the pmu via a phandle in smp_operations
From: Kever Yang <hidden>
Date: 2014-10-10 21:27:28
Also in:
lkml
Subsystem:
arm port, arm/rockchip soc support, the rest · Maintainers:
Russell King, Heiko Stuebner, Linus Torvalds
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@sntech.de> Signed-off-by: Kever Yang <redacted> --- 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