Messages in this thread | | | From | Geert Uytterhoeven <> | Date | Mon, 4 Jan 2021 17:49:03 +0100 | Subject | Re: [PATCH v2] drivers/soc/litex: Add restart handler |
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On Mon, Jan 4, 2021 at 5:45 PM Geert Uytterhoeven <geert@linux-m68k.org> wrote: > Let the LiteX SoC Controller a register a restart handler, which resets > the LiteX SoC by writing 1 to CSR_CTRL_RESET_ADDR. > > Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> > --- > Tested with linux-on-litex-vexriscv. > > This patch is based on upstream, i.e. not on top of Gabriel Somlo's > "[PATCH v5 0/4] drivers/soc/litex: support 32-bit subregisters, 64-bit > CPUs" > (https://lore.kernel.org/lkml/20201227161320.2194830-1-gsomlo@gmail.com/)
Bummer, and that's why the RESET_REG_* definitions are no longer next to the SCRATCH_REG_* definitions :-(
Well, I assume that will be fixed by evolution ;-)
> v2: > - Rebase on top of v5.11-rc1, > - Change reset handler priority to recommended default value of 128 > (was 192). > > (v1 was not sent to a mailing list) > --- > drivers/soc/litex/litex_soc_ctrl.c | 33 +++++++++++++++++++++++++++--- > 1 file changed, 30 insertions(+), 3 deletions(-) > > diff --git a/drivers/soc/litex/litex_soc_ctrl.c b/drivers/soc/litex/litex_soc_ctrl.c > index 1217cafdfd4d1d2b..d729ad50d4ffca5e 100644 > --- a/drivers/soc/litex/litex_soc_ctrl.c > +++ b/drivers/soc/litex/litex_soc_ctrl.c > @@ -15,6 +15,11 @@ > #include <linux/module.h> > #include <linux/errno.h> > #include <linux/io.h> > +#include <linux/reboot.h> > + > +/* reset register located at the base address */ > +#define RESET_REG_OFF 0x00 > +#define RESET_REG_VALUE 0x00000001 > > /* > * LiteX SoC Generator, depending on the configuration, can split a single
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
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