On 07/06/2016 07:42 PM, Alexandre Courbot wrote:
On Tue, Jul 5, 2016 at 6:04 PM, Joseph Lo <jose...@nvidia.com> wrote:
The BPMP is a specific processor in Tegra chip, which is designed for
booting process handling and offloading the power management, clock
management, and reset control tasks from the CPU. The binding document
defines the resources that would be used by the BPMP firmware driver,
which can create the interprocessor communication (IPC) between the CPU
and BPMP.
Signed-off-by: Joseph Lo <jose...@nvidia.com>
---
Changes in V2:
- update the message that the BPMP is clock and reset control provider
- add tegra186-clock.h and tegra186-reset.h header files
- revise the description of the required properties
---
.../bindings/firmware/nvidia,tegra186-bpmp.txt | 77 ++
include/dt-bindings/clock/tegra186-clock.h | 940 +++++++++++++++++++++
include/dt-bindings/reset/tegra186-reset.h | 217 +++++
3 files changed, 1234 insertions(+)
create mode 100644
Documentation/devicetree/bindings/firmware/nvidia,tegra186-bpmp.txt
create mode 100644 include/dt-bindings/clock/tegra186-clock.h
create mode 100644 include/dt-bindings/reset/tegra186-reset.h
diff --git
a/Documentation/devicetree/bindings/firmware/nvidia,tegra186-bpmp.txt
b/Documentation/devicetree/bindings/firmware/nvidia,tegra186-bpmp.txt
new file mode 100644
index 000000000000..4d0b6eba56c5
--- /dev/null
+++ b/Documentation/devicetree/bindings/firmware/nvidia,tegra186-bpmp.txt
@@ -0,0 +1,77 @@
+NVIDIA Tegra Boot and Power Management Processor (BPMP)
+
+The BPMP is a specific processor in Tegra chip, which is designed for
+booting process handling and offloading the power management, clock
+management, and reset control tasks from the CPU. The binding document
+defines the resources that would be used by the BPMP firmware driver,
+which can create the interprocessor communication (IPC) between the CPU
+and BPMP.
+
+Required properties:
+- name : Should be bpmp
+- compatible
+ Array of strings
+ One of:
+ - "nvidia,tegra186-bpmp"
+- mboxes : The phandle of mailbox controller and the mailbox specifier.
+- shmem : List of the phandle of the TX and RX shared memory area that
+ the IPC between CPU and BPMP is based on.
+- #clock-cells : Should be 1.
+- #reset-cells : Should be 1.
+
+This node is a mailbox consumer. See the following files for details of
+the mailbox subsystem, and the specifiers implemented by the relevant
+provider(s):
+
+- Documentation/devicetree/bindings/mailbox/mailbox.txt
+- Documentation/devicetree/bindings/mailbox/nvidia,tegra186-hsp.txt
+
+This node is a clock and reset provider. See the following files for
+general documentation of those features, and the specifiers implemented
+by this node:
+
+- Documentation/devicetree/bindings/clock/clock-bindings.txt
+- include/dt-bindings/clock/tegra186-clock.h
+- Documentation/devicetree/bindings/reset/reset.txt
+- include/dt-bindings/reset/tegra186-reset.h
+
+The shared memory bindings for BPMP
+-----------------------------------
+
+The shared memory area for the IPC TX and RX between CPU and BPMP are
+predefined and work on top of sysram, which is an SRAM inside the chip.
+
+See "Documentation/devicetree/bindings/sram/sram.txt" for the bindings.
+
+Example:
+
+hsp_top0: hsp@03c00000 {
+ ...
+ #mbox-cells = <1>;
+};
+
+sysram@30000000 {
+ compatible = "nvidia,tegra186-sysram", "mmio-ram";
Shouldn't the second compatible be "mmio-sram"?
If so, then you have the same typo in tegra186.dtsi as well.
Good catch, will fix.
Thanks,
-Joseph
