On 17/11/16 17:31, Thierry Reding wrote:
On Thu, Nov 17, 2016 at 05:28:53PM +0000, Sudeep Holla wrote:
On 17/11/16 17:16, Thierry Reding wrote:
From: Thierry Reding <treding@xxxxxxxxxx>
The power management controller on Tegra186 has changed in backwards-
incompatible ways with respect to earlier generations. This implements a
new driver that supports inversion of the PMU interrupt as well as the
"recovery", "bootloader" and "forced-recovery" reboot commands.
Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
---
.../bindings/arm/tegra/nvidia,tegra186-pmc.txt | 34 +++++
drivers/soc/tegra/Makefile | 2 +-
drivers/soc/tegra/pmc-tegra186.c | 169 +++++++++++++++++++++
3 files changed, 204 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/arm/tegra/nvidia,tegra186-pmc.txt
create mode 100644 drivers/soc/tegra/pmc-tegra186.c
[...]
diff --git a/drivers/soc/tegra/pmc-tegra186.c b/drivers/soc/tegra/pmc-tegra186.c
new file mode 100644
index 000000000000..ee28eddd8e3c
--- /dev/null
+++ b/drivers/soc/tegra/pmc-tegra186.c
[...]
+
+ /*
+ * If available, call the system restart implementation that was
+ * registered earlier (typically PSCI).
+ */
+ if (pmc->system_restart) {
+ pmc->system_restart(reboot_mode, cmd);
+ return NOTIFY_DONE;
+ }
+
IIUC, Tegra186 implements PSCI v1.0 and it always takes above path.
So what other platforms does this driver support ? The name is
pmc-tegra186.c, hence the confusion.
It's technically possible to run Tegra186 without PSCI enabled, or even
boot it with firmware that doesn't implement PSCI. In such cases it
OK, with enable-method as "spin-table" I suppose ?
would be nice to still be able to reboot via the PMC code above.
I assume it's only for development purposes as you won't have much CPU
power management support without PSCI.
--
Regards,
Sudeep
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