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Tegra: PMC: lock SCRATCH22 register 

The PMC Scratch22 register contains the CPU reset vector to
be used by the warmboot code to power up the CPU while resuming
from  system suspend. This patch locks this PMC register to avoid
any further writes.

Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
This commit is contained in:
Varun Wadekar 2015-07-16 10:38:11 +05:30
parent 2e7aea3d48
commit 764c57f6f5
1 changed files with 5 additions and 0 deletions
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5
plat/nvidia/tegra/common/drivers/pmc/pmc.c
View File

@ -105,6 +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 |