From mboxrd@z Thu Jan 1 00:00:00 1970 From: nicolas.pitre@linaro.org (Nicolas Pitre) Date: Wed, 17 Jul 2013 23:28:36 -0400 Subject: [PATCH 4/4] ARM: vexpress/TC2: implement PM suspend method In-Reply-To: <1374118116-16836-1-git-send-email-nicolas.pitre@linaro.org> References: <1374118116-16836-1-git-send-email-nicolas.pitre@linaro.org> Message-ID: <1374118116-16836-5-git-send-email-nicolas.pitre@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Nicolas Pitre Similar to power_down(), except that for a suspend, the firmware mailbox address has to be set prior entering low power mode. The residency argument is not used yet, so the last man always shuts down the cluster for now. Signed-off-by: Nicolas Pitre Acked-by: Pawel Moll --- arch/arm/mach-vexpress/tc2_pm.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-vexpress/tc2_pm.c b/arch/arm/mach-vexpress/tc2_pm.c index 26dbe782fb..dfb55d45b6 100644 --- a/arch/arm/mach-vexpress/tc2_pm.c +++ b/arch/arm/mach-vexpress/tc2_pm.c @@ -84,7 +84,7 @@ static int tc2_pm_power_up(unsigned int cpu, unsigned int cluster) return 0; } -static void tc2_pm_power_down(void) +static void tc2_pm_down(u64 residency) { unsigned int mpidr, cpu, cluster; bool last_man = false, skip_wfi = false; @@ -198,6 +198,22 @@ static void tc2_pm_power_down(void) /* Not dead at this point? Let our caller cope. */ } +static void tc2_pm_power_down(void) +{ + tc2_pm_down(0); +} + +static void tc2_pm_suspend(u64 residency) +{ + unsigned int mpidr, cpu, cluster; + + mpidr = read_cpuid_mpidr(); + cpu = MPIDR_AFFINITY_LEVEL(mpidr, 0); + cluster = MPIDR_AFFINITY_LEVEL(mpidr, 1); + ve_spc_set_resume_addr(cluster, cpu, virt_to_phys(mcpm_entry_point)); + tc2_pm_down(residency); +} + static void tc2_pm_powered_up(void) { unsigned int mpidr, cpu, cluster; @@ -231,6 +247,7 @@ static void tc2_pm_powered_up(void) static const struct mcpm_platform_ops tc2_pm_power_ops = { .power_up = tc2_pm_power_up, .power_down = tc2_pm_power_down, + .suspend = tc2_pm_suspend, .powered_up = tc2_pm_powered_up, }; -- 1.8.1.2