[RFC PATCH V3 5/5] powernv/cpuidle: Enable idle powernv cpu to call into the cpuidle framework.
From: Deepthi Dharwar <hidden>
Date: 2013-08-19 04:29:20
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
This patch enables idle cpu on the powernv platform to hook on to the cpuidle framework, if available, else call on to default idle platform code. Signed-off-by: Deepthi Dharwar <redacted> --- arch/powerpc/platforms/powernv/setup.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c
index 84438af..fc62f21 100644
--- a/arch/powerpc/platforms/powernv/setup.c
+++ b/arch/powerpc/platforms/powernv/setup.c@@ -25,6 +25,7 @@ #include <linux/of.h> #include <linux/interrupt.h> #include <linux/bug.h> +#include <linux/cpuidle.h> #include <asm/machdep.h> #include <asm/firmware.h>
@@ -175,6 +176,17 @@ static void __init pnv_setup_machdep_rtas(void) } #endif /* CONFIG_PPC_POWERNV_RTAS */ +void powernv_idle(void) +{ + /* Hook to cpuidle framework if available, else + * call on default platform idle code + */ + if (cpuidle_idle_call()) { + HMT_low(); + HMT_very_low(); + } +} + static int __init pnv_probe(void) { unsigned long root = of_get_flat_dt_root();
@@ -205,7 +217,7 @@ define_machine(powernv) { .show_cpuinfo = pnv_show_cpuinfo, .progress = pnv_progress, .machine_shutdown = pnv_shutdown, - .power_save = power7_idle, + .power_save = powernv_idle, .calibrate_decr = generic_calibrate_decr, #ifdef CONFIG_KEXEC .kexec_cpu_down = pnv_kexec_cpu_down,