From 65fe31da5cede3597938b0f3bba99f604369018d Mon Sep 17 00:00:00 2001 From: Peter De Schrijver Date: Fri, 10 Feb 2012 01:47:49 +0200 Subject: ARM: tegra: support for Tegra30 CPU powerdomains Secondary CPU powerdomains can be powergated on Tegra30. Add the necessary functions to do this. This will be used to boot the secondary CPUs later on. Signed-off-by: Peter De Schrijver Acked-by: Stephen Warren Tested-by: Stephen Warren Signed-off-by: Olof Johansson --- arch/arm/mach-tegra/powergate.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) (limited to 'arch/arm/mach-tegra/powergate.c') diff --git a/arch/arm/mach-tegra/powergate.c b/arch/arm/mach-tegra/powergate.c index 7120ad7e135..c238699ae86 100644 --- a/arch/arm/mach-tegra/powergate.c +++ b/arch/arm/mach-tegra/powergate.c @@ -41,6 +41,14 @@ #define PWRGATE_STATUS 0x38 static int tegra_num_powerdomains; +static int tegra_num_cpu_domains; +static u8 *tegra_cpu_domains; +static u8 tegra30_cpu_domains[] = { + TEGRA_POWERGATE_CPU0, + TEGRA_POWERGATE_CPU1, + TEGRA_POWERGATE_CPU2, + TEGRA_POWERGATE_CPU3, +}; static DEFINE_SPINLOCK(tegra_powergate_lock); @@ -161,6 +169,14 @@ err_power: return ret; } +int tegra_cpu_powergate_id(int cpuid) +{ + if (cpuid > 0 && cpuid < tegra_num_cpu_domains) + return tegra_cpu_domains[cpuid]; + + return -EINVAL; +} + int __init tegra_powergate_init(void) { switch (tegra_chip_id) { @@ -169,6 +185,8 @@ int __init tegra_powergate_init(void) break; case TEGRA30: tegra_num_powerdomains = 14; + tegra_num_cpu_domains = 4; + tegra_cpu_domains = tegra30_cpu_domains; break; default: /* Unknown Tegra variant. Disable powergating */ @@ -178,7 +196,6 @@ int __init tegra_powergate_init(void) return 0; } -arch_initcall(tegra_powergate_init); #ifdef CONFIG_DEBUG_FS -- cgit v1.2.3-70-g09d2