On Mon, 9 Mar 2009, Tony Lindgren wrote: > * Juha Yrjola <[email protected]> [090308 10:20]: > > The reboot mode can be communicated to a bootloader (or the > > kernel itself) with a scratchpad register. This functionality > > is especially useful, if userspace is allowed to change > > the reboot mode. > > > > Signed-off-by: Juha Yrjola <[email protected]> > > --- > > arch/arm/mach-omap2/prcm.c | 10 ++++++++-- > > 1 files changed, 8 insertions(+), 2 deletions(-) > > > > diff --git a/arch/arm/mach-omap2/prcm.c b/arch/arm/mach-omap2/prcm.c > > index f945156..2bd239e 100644 > > --- a/arch/arm/mach-omap2/prcm.c > > +++ b/arch/arm/mach-omap2/prcm.c > > @@ -43,9 +43,15 @@ void omap_prcm_arch_reset(char mode) > > > > if (cpu_is_omap24xx()) > > prcm_offs = WKUP_MOD; > > - else if (cpu_is_omap34xx()) > > + else if (cpu_is_omap34xx()) { > > + u32 l; > > + > > prcm_offs = OMAP3430_GR_MOD; > > - else > > + l = ('B' << 24) | ('M' << 16) | mode; > > + /* Reserve the first word in scratchpad for communicating > > + * with the boot ROM. */ > > + omap_writel(l, OMAP343X_SCRATCHPAD + 4); > > + } else > > WARN_ON(1); > > > > prm_set_mod_reg_bits(OMAP_RST_DPLL3, prcm_offs, RM_RSTCTRL); > > Looks OK to me, any comments from Kevin or Paul?
Can't find "BMxx" in the Rev O 34xx TRM. Is this a NOLO-specific feature, or is this a known standard supported by other bootloaders? If the former, maybe it would be good to add a few lines of documentation in Documentation/arm/OMAP/rebooting or some other place? - Paul -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
