@@ -27,6 +27,7 @@
#include <asm/hardware/gic.h>
#include <mach/iomap.h>
+#include <mach/powergate.h>
#include "board.h"
#include "clock.h"
@@ -120,6 +121,7 @@ void __init tegra20_init_early(void)
tegra_clk_init_from_table(tegra20_clk_init_table);
tegra_init_cache(0x331, 0x441);
tegra_pmc_init();
+ tegra_powergate_init();
}
#endif
#ifdef CONFIG_ARCH_TEGRA_3x_SOC
@@ -129,5 +131,6 @@ void __init tegra30_init_early(void)
tegra30_init_clocks();
tegra_init_cache(0x441, 0x551);
tegra_pmc_init();
+ tegra_powergate_init();
}
#endif
@@ -38,6 +38,9 @@
#define TEGRA_POWERGATE_CPU0 TEGRA_POWERGATE_CPU
#define TEGRA_POWERGATE_3D0 TEGRA_POWERGATE_3D
+int __init tegra_powergate_init(void);
+
+int tegra_cpu_powergate_id(int cpuid);
int tegra_powergate_is_powered(int id);
int tegra_powergate_power_on(int id);
int tegra_powergate_power_off(int id);
@@ -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
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 <pdeschrijver@nvidia.com> --- arch/arm/mach-tegra/common.c | 3 +++ arch/arm/mach-tegra/include/mach/powergate.h | 3 +++ arch/arm/mach-tegra/powergate.c | 19 ++++++++++++++++++- 3 files changed, 24 insertions(+), 1 deletions(-)