OMAP3: control/PRCM: add omap3_ctrl_write_boot_mode()

Get rid of the open-coded scratchpad write in mach-omap2/prcm.c and
replace it with an actual API, omap3_ctrl_write_boot_mode().  While
there, get rid of the gratuitous omap_writel().

There's not much documentation available for what should wind up in
the scratchpad here, so more documentation would be appreciated.
Also, at some point, we should formalize our treatment of the scratchpad;
right now, accesses to the scratchpad are not well-documented.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Reviewed-by: Kevin Hilman <khilman@deeprootsystems.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>

1 files changed, 1 insertions, 9 deletions

diff --git a/arch/arm/mach-omap2/prcm.c b/arch/arm/mach-omap2/prcm.c
index a51846e3a6fa..2eca8475d396 100644
--- a/arch/arm/mach-omap2/prcm.c
+++ b/arch/arm/mach-omap2/prcm.c
@@ -143,16 +143,8 @@ void omap_prcm_arch_reset(char mode, const char *cmd)
 
                 prcm_offs = WKUP_MOD;
         } else if (cpu_is_omap34xx()) {
-                u32 l;
-
                 prcm_offs = OMAP3430_GR_MOD;
-                l = ('B' << 24) | ('M' << 16) | (cmd ? (u8)*cmd : 0);
-                /* 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);
+                omap3_ctrl_write_boot_mode((cmd ? (u8)*cmd : 0));
         } else if (cpu_is_omap44xx())
                 prcm_offs = OMAP4430_PRM_DEVICE_MOD;
         else