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Diffstat (limited to 'arch/arm/mach-exynos')
-rw-r--r--arch/arm/mach-exynos/firmware.c1
-rw-r--r--arch/arm/mach-exynos/suspend.c21
2 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/firmware.c b/arch/arm/mach-exynos/firmware.c
index fd6da5419b51..2199c3adfd84 100644
--- a/arch/arm/mach-exynos/firmware.c
+++ b/arch/arm/mach-exynos/firmware.c
@@ -205,6 +205,7 @@ void __init exynos_firmware_init(void)
return;
addr = of_get_address(nd, 0, NULL, NULL);
+ of_node_put(nd);
if (!addr) {
pr_err("%s: No address specified.\n", __func__);
return;
diff --git a/arch/arm/mach-exynos/suspend.c b/arch/arm/mach-exynos/suspend.c
index 3e1430a886b2..b406c12077b9 100644
--- a/arch/arm/mach-exynos/suspend.c
+++ b/arch/arm/mach-exynos/suspend.c
@@ -500,8 +500,27 @@ early_wakeup:
static void exynos5420_prepare_pm_resume(void)
{
+ unsigned int mpidr, cluster;
+
+ mpidr = read_cpuid_mpidr();
+ cluster = MPIDR_AFFINITY_LEVEL(mpidr, 1);
+
if (IS_ENABLED(CONFIG_EXYNOS5420_MCPM))
WARN_ON(mcpm_cpu_powered_up());
+
+ if (IS_ENABLED(CONFIG_HW_PERF_EVENTS) && cluster != 0) {
+ /*
+ * When system is resumed on the LITTLE/KFC core (cluster 1),
+ * the DSCR is not properly updated until the power is turned
+ * on also for the cluster 0. Enable it for a while to
+ * propagate the SPNIDEN and SPIDEN signals from Secure JTAG
+ * block and avoid undefined instruction issue on CP14 reset.
+ */
+ pmu_raw_writel(S5P_CORE_LOCAL_PWR_EN,
+ EXYNOS_COMMON_CONFIGURATION(0));
+ pmu_raw_writel(0,
+ EXYNOS_COMMON_CONFIGURATION(0));
+ }
}
static void exynos5420_pm_resume(void)
@@ -715,8 +734,10 @@ void __init exynos_pm_init(void)
if (WARN_ON(!of_find_property(np, "interrupt-controller", NULL))) {
pr_warn("Outdated DT detected, suspend/resume will NOT work\n");
+ of_node_put(np);
return;
}
+ of_node_put(np);
pm_data = (const struct exynos_pm_data *) match->data;