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 <[email protected]> > --- > 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 can > + have 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 <[email protected]> And if there's no other feedback, Lokesh, please just fix that up when applying, thanks. -- Tom
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