diff options
Diffstat (limited to 'plat/nvidia/tegra/common/drivers/pmc/pmc.c')
| -rw-r--r-- | plat/nvidia/tegra/common/drivers/pmc/pmc.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/plat/nvidia/tegra/common/drivers/pmc/pmc.c b/plat/nvidia/tegra/common/drivers/pmc/pmc.c index 5796ac79..d48b5754 100644 --- a/plat/nvidia/tegra/common/drivers/pmc/pmc.c +++ b/plat/nvidia/tegra/common/drivers/pmc/pmc.c @@ -52,6 +52,13 @@ void tegra_pmc_cpu_on(int cpu) uint32_t val; /* + * Check if CPU is already power ungated + */ + val = tegra_pmc_read_32(PMC_PWRGATE_STATUS); + if (val & (1 << pmc_cpu_powergate_id[cpu])) + return; + + /* * The PMC deasserts the START bit when it starts the power * ungate process. Loop till no power toggle is in progress. */ @@ -98,6 +105,11 @@ void tegra_pmc_lock_cpu_vectors(void) { uint32_t val; + /* lock PMC_SECURE_SCRATCH22 */ + val = tegra_pmc_read_32(PMC_SECURE_DISABLE2); + val |= PMC_SECURE_DISABLE2_WRITE22_ON; + tegra_pmc_write_32(PMC_SECURE_DISABLE2, val); + /* lock PMC_SECURE_SCRATCH34/35 */ val = tegra_pmc_read_32(PMC_SECURE_DISABLE3); val |= (PMC_SECURE_DISABLE3_WRITE34_ON | |