On Fri, Feb 14, 2020 at 11:18:15AM +0200, Tero Kristo wrote:
The ESM (Error Signaling Module) is used to route error signals within the K3 SoCs somewhat similar to interrupts. The handling for these is different though, and can be routed for hardware error handling, to be handled by safety processor or just as error interrupts handled by the main processor. The u-boot level ESM driver is just used to configure the ESM signals so that they get routed to proper destination.
Signed-off-by: Tero Kristo t-kristo@ti.com
doc/device-tree-bindings/misc/esm-k3.txt | 25 +++++++ drivers/misc/Kconfig | 5 ++ drivers/misc/Makefile | 1 + drivers/misc/k3_esm.c | 87 ++++++++++++++++++++++++ 4 files changed, 118 insertions(+) create mode 100644 doc/device-tree-bindings/misc/esm-k3.txt create mode 100644 drivers/misc/k3_esm.c
diff --git a/doc/device-tree-bindings/misc/esm-k3.txt b/doc/device-tree-bindings/misc/esm-k3.txt new file mode 100644 index 0000000000..01c8b6b294 --- /dev/null +++ b/doc/device-tree-bindings/misc/esm-k3.txt @@ -0,0 +1,25 @@ +Texas Instruments K3 ESM Binding +======================
+ESM (Error Signaling Module) is an IP block on TI K3 devices that allows +handling of safety events somewhat similar to what interrupt controller +would do. The safety signals have their separate paths within the SoC, +and they are handled by the ESM, which routes them to the proper +destination, which can be system reset, interrupt controller, etc. In +the simplest configuration the signals are just routed to reset the +SoC.
+Required properties : +- compatible : "ti,j721e-esm" +- ti,esm-pins : integer array of esm events IDs to route to external event
pin which can be used to reset the SoC. The array canhave arbitrary amount of event IDs listed on it.+Example +=======
- main_esm: esm@700000 {
compatible = "ti,j721e-esm";reg = <0x0 0x700000 0x0 0x1000>;ti,esm-pins = <344>, <345>;- };
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index f18aa8f7ba..38588b2cbd 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -462,6 +462,11 @@ config IHS_FPGA gdsys devices, which supply the majority of the functionality offered by the devices. This driver supports both CON and CPU variants of the devices, depending on the device tree entry.
missing space.
Otherwise: Reviewed-by: Tom Rini trini@konsulko.com
And if there's no other feedback, Lokesh, please just fix that up when applying, thanks.