diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-tegra/flowctrl.h | 1 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/platsmp.c | 25 |
2 files changed, 25 insertions, 1 deletions
diff --git a/arch/arm/mach-tegra/flowctrl.h b/arch/arm/mach-tegra/flowctrl.h index 67eab56699b..7a29bae799a 100644 --- a/arch/arm/mach-tegra/flowctrl.h +++ b/arch/arm/mach-tegra/flowctrl.h @@ -25,6 +25,7 @@ #define FLOW_CTRL_WAITEVENT (2 << 29) #define FLOW_CTRL_WAIT_FOR_INTERRUPT (4 << 29) #define FLOW_CTRL_JTAG_RESUME (1 << 28) +#define FLOW_CTRL_SCLK_RESUME (1 << 27) #define FLOW_CTRL_HALT_CPU_IRQ (1 << 10) #define FLOW_CTRL_HALT_CPU_FIQ (1 << 8) #define FLOW_CTRL_CPU0_CSR 0x8 diff --git a/arch/arm/mach-tegra/platsmp.c b/arch/arm/mach-tegra/platsmp.c index fad4226ef71..554aedc98c9 100644 --- a/arch/arm/mach-tegra/platsmp.c +++ b/arch/arm/mach-tegra/platsmp.c @@ -140,8 +140,31 @@ remove_clamps: static int tegra114_boot_secondary(unsigned int cpu, struct task_struct *idle) { + int ret = 0; + cpu = cpu_logical_map(cpu); - return tegra_pmc_cpu_power_on(cpu); + + if (cpumask_test_cpu(cpu, &tegra_cpu_init_mask)) { + /* + * Warm boot flow + * The flow controller in charge of the power state and + * control for each CPU. + */ + /* set SCLK as event trigger for flow controller */ + flowctrl_write_cpu_csr(cpu, 1); + flowctrl_write_cpu_halt(cpu, + FLOW_CTRL_WAITEVENT | FLOW_CTRL_SCLK_RESUME); + } else { + /* + * Cold boot flow + * The CPU is powered up by toggling PMC directly. It will + * also initial power state in flow controller. After that, + * the CPU's power state is maintained by flow controller. + */ + ret = tegra_pmc_cpu_power_on(cpu); + } + + return ret; } static int __cpuinit tegra_boot_secondary(unsigned int cpu, |