Hi Tom, Felix, all > -----Original Message----- > From: Tom Rini [mailto:[email protected]] > Sent: Saturday, July 14, 2018 6:50 PM > To: Wolfgang Denk <[email protected]> > Cc: Felix Brack <[email protected]>; [email protected]; Stefan Roese > <[email protected]>; Alexey Brodkin <[email protected]>; > Alexander Graf <[email protected]>; Michal Simek <[email protected]> > Subject: Re: [U-Boot] [PATCH] serial: ns16550: Add register shift variable > > On Sat, Jul 14, 2018 at 12:47:21PM +0200, Wolfgang Denk wrote: > > Dear Felix, > > > > In message <[email protected]> you wrote: > > > > > > The motivation for writing this patch originates in the > > > effort of synchronizing U-Boot DT to Linux DT for am33xx SOCs. > > > The current am33xx.dtsi file from U-Boot defines the <reg-shift> > > > property for all UART nodes. The actual (4.18+) am33xx.dtsi > > > file from Linux does not define <reg-shift> anymore. To prevent > > > (probably difficult) changes in many .dts and .dtsi files once > > > the synchronization is done, one can use this new variable. For > > > the pdu001 board, for example, SYS_NS16550_REG_SHIFT is set > > > to 2; no need to clutter U-Boot and board specific dts files > > > with <reg-shift> properties. > > > > Does this mean that U-Boot will not be able to use the same DTB as > > Linux? > > To be clear, it's the other way around. We can't use the Linux dtb/dts > files as they've dropped (and in other cases, aren't adding) these > properties as it's handled differently.
Any chance to get a reference to the commit in Linux kernel that introduces that change? I still see a bunch of: ----------------------------->8---------------------- reg-shift = <2>; reg-io-width = <4>; ----------------------------->8---------------------- in .dts files for ARC boards even in linux-next git tree. -Alexey _______________________________________________ U-Boot mailing list [email protected] https://lists.denx.de/listinfo/u-boot
