On Thu, 2015-10-15 at 07:11 +0000, Joakim Tjernlund wrote: > On Wed, 2015-10-14 at 19:11 -0500, Scott Wood wrote: > > On Wed, 2015-10-14 at 19:37 +0000, Joakim Tjernlund wrote: > > > I am trying to figure out how to describe/map external IRQ7 in the > > > devicetree. > > > > > > Basically either IRQ7 to be left alone by Linux(becase u-boot already > > > set > > > it up) > > > or map IRQ7 to sie 0(MPIC_EILR7=0xf0) and prio=0xf(MPIC_EIVPR7=0x4f0000) > > > > > > There is no need for SW handler because IRQ7 will be routed to the DDR > > > controller > > > and case an automatic Self Refresh just before CPU reset. > > > > > > I cannot figure out how to do this. Any ideas? > > > > > > If not possible from devicetree, then can one do it from board code? > > > > The device tree describes the hardware. Priority is configuration, and > > thus > > doesn't belong there. You can call mpic_irq_set_priority() from board > > code. > > Right. > > > > > Likewise, the fact that you want to route irq7 to sie0 is configuration, > > not > > hardware description. At most, the device tree should describe is what > > is > > connected to each sie output. There's no current Linux support for > > routing > > an interrupt to sie or anything other than "int". > > That explains why I could not find any mpic function for that .. > > I found mpic dev. trees property "protected-sources" which might do what I > want, just > leave the the irq alone but I cannot figure out what value to write there. > Could you give me any example how to calculate dev. tree irq number for > IRQ7? > > The mpic.txt mentions "Interrupt Source Configuration Registers" but google > did > not turn up anything useful for me.
The device tree number for external IRQ 7 is 7. Another option is to use the pic-no-reset property. -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
