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Commit 692ec4ab authored by Juha Yrjola's avatar Juha Yrjola Committed by Kevin Hilman
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OMAP: Store reboot mode in scratchpad on OMAP34xx 



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: default avatarJuha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
Signed-off-by: default avatarKevin Hilman <khilman@deeprootsystems.com>
parent bf07c9f2

arch/arm/mach-omap2/prcm.c

+11 −2
Original line number Original line Diff line number Diff line
@@ -135,9 +135,18 @@ void omap_prcm_arch_reset(char mode) 




	if (cpu_is_omap24xx())

	if (cpu_is_omap24xx())

		prcm_offs = WKUP_MOD;

		prcm_offs = WKUP_MOD;

	else if (cpu_is_omap34xx())

	else if (cpu_is_omap34xx()) {

		u32 l;



		prcm_offs = OMAP3430_GR_MOD;

		prcm_offs = OMAP3430_GR_MOD;

	else

		l = ('B' << 24) | ('M' << 16) | mode;

		/* Reserve the first word in scratchpad for communicating

		 * with the boot ROM. A pointer to a data structure

		 * describing the boot process can be stored there,

		 * cf. OMAP34xx TRM, Initialization / Software Booting

		 * Configuration. */

		omap_writel(l, OMAP343X_SCRATCHPAD + 4);

	} else

		WARN_ON(1);

		WARN_ON(1);





	prm_set_mod_reg_bits(OMAP_RST_DPLL3, prcm_offs, RM_RSTCTRL);

	prm_set_mod_reg_bits(OMAP_RST_DPLL3, prcm_offs, RM_RSTCTRL);