ARM: EXYNOS: add coupled cpuidle support for Exynos3250
The following patch adds coupled cpuidle support for Exynos3250 to
an existing cpuidle-exynos driver. As a result it enables AFTR mode
to be used by default on Exynos3250 without the need to hot unplug
CPU1 first.
The detailed changelog:
- use exynos_[get,set]_boot_addr() in cpuidle-exynos.c and then make
cpu_boot_reg_base() static
- use exynos_core_restart() in exynos_cpu0_enter_aftr()
- add missing smp_rmb() to exynos_cpu0_enter_aftr() (to make the code
in-sync with the platform SMP code)
- add call_firmware_op(cpu_boot, 1) to exynos_cpu0_enter_aftr()
- use dsb_sev() instead of IPI wakeup for Exynos3250 in
exynos_cpu0_enter_aftr()
- add CPU0 vs CPU1 synchronization based on S5P_PMU_SPARE2 register
for Exynos3250 to cpuidle-exynos.c
- add flush_cache_all() for CPU1/0 before powerdown/AFTR for
Exynos3250 to exynos_wfi_finisher()/exynos_do_idle()
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c
index 5917a30..4bd8b76 100644
--- a/arch/arm/mach-exynos/exynos.c
+++ b/arch/arm/mach-exynos/exynos.c
@@ -234,7 +234,8 @@
exynos_sysram_init();
#if defined(CONFIG_SMP) && defined(CONFIG_ARM_EXYNOS_CPUIDLE)
- if (of_machine_is_compatible("samsung,exynos4210"))
+ if (of_machine_is_compatible("samsung,exynos4210") ||
+ of_machine_is_compatible("samsung,exynos3250"))
exynos_cpuidle.dev.platform_data = &cpuidle_coupled_exynos_data;
#endif
if (of_machine_is_compatible("samsung,exynos4210") ||