From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joseph Lo Subject: [PATCH V2 4/4] ARM: tegra114: bring up secondary CPU for SMP Date: Wed, 27 Feb 2013 10:28:07 +0800 Message-ID: <1361932087-13372-5-git-send-email-josephl@nvidia.com> References: <1361932087-13372-1-git-send-email-josephl@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1361932087-13372-1-git-send-email-josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Stephen Warren Cc: linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Joseph Lo List-Id: linux-tegra@vger.kernel.org The secondary CPU can be brought up by toggling the power in PMC. Then the flow controller will release CPU to go by clearing the reset and clamp signal automatically. Based on the work by: Bo Yan Signed-off-by: Joseph Lo --- V2: * no change --- arch/arm/mach-tegra/platsmp.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm/mach-tegra/platsmp.c b/arch/arm/mach-tegra/platsmp.c index 601bd0c..516aab2 100644 --- a/arch/arm/mach-tegra/platsmp.c +++ b/arch/arm/mach-tegra/platsmp.c @@ -146,6 +146,12 @@ remove_clamps: return 0; } +static int tegra114_boot_secondary(unsigned int cpu, struct task_struct *idle) +{ + cpu = cpu_logical_map(cpu); + return tegra_pmc_cpu_power_on(cpu); +} + static int __cpuinit tegra_boot_secondary(unsigned int cpu, struct task_struct *idle) { @@ -153,6 +159,8 @@ static int __cpuinit tegra_boot_secondary(unsigned int cpu, return tegra20_boot_secondary(cpu, idle); if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) && tegra_chip_id == TEGRA30) return tegra30_boot_secondary(cpu, idle); + if (IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) && tegra_chip_id == TEGRA114) + return tegra114_boot_secondary(cpu, idle); return -EINVAL; } -- 1.8.1.1