ARM: OMAP3: Fix hardware detection for omap3630 when booted with device tree

SoC family definitions at the moment are reactive to board needs
as a result, beagle-xm would matchup with ti,omap3 which invokes
omap3430_init_early instead of omap3630_init_early. Obviously, this is
the wrong behavior.

With clock node dts conversion, we get the following warnings before
system hangs as a result and 3630 based platforms fails to boot
(uart4 clocks are only present in OMAP3630 and not present in
OMAP3430):

...
omap_hwmod: uart4: cannot clk_get main_clk uart4_fck
omap_hwmod: uart4: cannot _init_clocks

WARNING: CPU: 0 PID: 1 at arch/arm/mach-omap2/omap_hwmod.c:2434
_init+0x6c/0x80()
omap_hwmod: uart4: couldn't init clocks
...

WARNING: CPU: 0 PID: 1 at arch/arm/mach-omap2/omap_hwmod.c:2126
_enable+0x254/0x280()
omap_hwmod: timer12: enabled state can only be entered from
initialized, idle, or disabled state
...

WARNING: CPU: 0 PID: 46 at arch/arm/mach-omap2/omap_hwmod.c:2224
_idle+0xd4/0xf8()
omap_hwmod: timer12: idle state can only be entered from enabled state

WARNING: CPU: 0 PID: 1 at arch/arm/mach-omap2/omap_hwmod.c:2126
_enable+0x254/0x280()
omap_hwmod: uart4: enabled state can only be entered from
initialized, idle, or disabled state

So, add specific compatiblity for 3630 to allow match for Beagle-XM
platform.

Signed-off-by: Nishanth Menon <nm@ti.com>
[tony@atomide.com: left out ti,omap343x, updated comments]
Signed-off-by: Tony Lindgren <tony@atomide.com>

2 files changed, 19 insertions, 1 deletions

diff --git a/arch/arm/boot/dts/omap3-beagle-xm.dts b/arch/arm/boot/dts/omap3-beagle-xm.dts
index 0c514dc8460c..2816bf612672 100644
--- a/arch/arm/boot/dts/omap3-beagle-xm.dts
+++ b/arch/arm/boot/dts/omap3-beagle-xm.dts
@@ -11,7 +11,7 @@
 
 / {
         model = "TI OMAP3 BeagleBoard xM";
-        compatible = "ti,omap3-beagle-xm", "ti,omap3-beagle", "ti,omap3";
+        compatible = "ti,omap3-beagle-xm", "ti,omap36xx", "ti,omap3";
 
         cpus {
                 cpu@0 {
diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c
index 39c78387ddec..87162e1b94a5 100644
--- a/arch/arm/mach-omap2/board-generic.c
+++ b/arch/arm/mach-omap2/board-generic.c
@@ -129,6 +129,24 @@ DT_MACHINE_START(OMAP3_DT, "Generic OMAP3 (Flattened Device Tree)")
         .restart        = omap3xxx_restart,
 MACHINE_END
 
+static const char *omap36xx_boards_compat[] __initdata = {
+        "ti,omap36xx",
+        NULL,
+};
+
+DT_MACHINE_START(OMAP36XX_DT, "Generic OMAP36xx (Flattened Device Tree)")
+        .reserve        = omap_reserve,
+        .map_io         = omap3_map_io,
+        .init_early     = omap3630_init_early,
+        .init_irq       = omap_intc_of_init,
+        .handle_irq     = omap3_intc_handle_irq,
+        .init_machine   = omap_generic_init,
+        .init_late      = omap3_init_late,
+        .init_time      = omap3_sync32k_timer_init,
+        .dt_compat      = omap36xx_boards_compat,
+        .restart        = omap3xxx_restart,
+MACHINE_END
+
 static const char *omap3_gp_boards_compat[] __initdata = {
         "ti,omap3-beagle",
         "timll,omap3-devkit8000",