From mboxrd@z Thu Jan 1 00:00:00 1970 From: santosh.shilimkar@ti.com (Santosh Shilimkar) Date: Sat, 19 Feb 2011 16:12:27 +0530 Subject: [PATCH 06/17] omap4: pm: Program CPU1 to hit OFF when off-lined In-Reply-To: <1298112158-28469-1-git-send-email-santosh.shilimkar@ti.com> References: <1298112158-28469-1-git-send-email-santosh.shilimkar@ti.com> Message-ID: <1298112158-28469-7-git-send-email-santosh.shilimkar@ti.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Program non-boot CPUs to hit lowest supported power state when it is off-lined using cpu hotplug framework. Signed-off-by: Santosh Shilimkar Reviewed-by: Kevin Hilman --- arch/arm/mach-omap2/omap-hotplug.c | 18 +++++++++++++----- 1 files changed, 13 insertions(+), 5 deletions(-) diff --git a/arch/arm/mach-omap2/omap-hotplug.c b/arch/arm/mach-omap2/omap-hotplug.c index 4976b93..9f8f097 100644 --- a/arch/arm/mach-omap2/omap-hotplug.c +++ b/arch/arm/mach-omap2/omap-hotplug.c @@ -20,6 +20,9 @@ #include #include +#include + +#include "powerdomain.h" int platform_cpu_kill(unsigned int cpu) { @@ -32,6 +35,8 @@ int platform_cpu_kill(unsigned int cpu) */ void platform_cpu_die(unsigned int cpu) { + unsigned int this_cpu; + flush_cache_all(); dsb(); @@ -39,18 +44,21 @@ void platform_cpu_die(unsigned int cpu) * we're ready for shutdown now, so do it */ if (omap_modify_auxcoreboot0(0x0, 0x200) != 0x0) - printk(KERN_CRIT "Secure clear status failed\n"); + pr_err("Secure clear status failed\n"); for (;;) { /* - * Execute WFI + * Enter into low power state + * clear all interrupt wakeup sources */ - do_wfi(); - - if (omap_read_auxcoreboot0() == cpu) { + omap_wakeupgen_irqmask_all(cpu, 1); + omap4_enter_lowpower(cpu, PWRDM_POWER_OFF); + this_cpu = hard_smp_processor_id(); + if (omap_read_auxcoreboot0() == this_cpu) { /* * OK, proper wakeup, we're done */ + omap_wakeupgen_irqmask_all(this_cpu, 0); break; } pr_debug("CPU%u: spurious wakeup call\n", cpu); -- 1.6.0.4