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firmware: PSCI: Fix PSCI support for OF live trees 

When CONFIG_OF_LIVE is enabled, dev_of_offset() cannot be used and
if used returns an invalid offset. This causes the call to
fdt_stringlist_get() in the psci_probe() to fail to read the 'method'
property from the PSCI node for the device and hence prevents PSCI
from working. Fix this by using the ofnode_read_string() API instead
of the fdt_stringlist_get() because this will handle reading the
property both when CONFIG_OF_LIVE is enabled or disabled.

Due to the above problem and since commit 81ea00838c ("efi_loader:
PSCI reset and shutdown") was added, the EFI system reset has been
broken for Tegra210 and Tegra196 platforms. This also fixes the EFI
system reset for these Tegra platforms.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
This commit is contained in:
Jon Hunter 2020-06-18 12:54:38 +01:00 committed by Tom Warren
parent 9cb895203a
commit fb264efbd2
1 changed files with 1 additions and 3 deletions
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4
drivers/firmware/psci.c
View File

@ -67,11 +67,9 @@ static int psci_bind(struct udevice *dev)
static int psci_probe(struct udevice *dev)
{
DECLARE_GLOBAL_DATA_PTR;
const char *method;
method = fdt_stringlist_get(gd->fdt_blob, dev_of_offset(dev), "method",
0, NULL);
method = ofnode_read_string(dev_ofnode(dev), "method");
if (!method) {
pr_warn("missing \"method\" property\n");
return -ENXIO;