Re: [PATCH, RFC 6/8] ARM: OMAP2+: am43: basic dt support

From: Santosh Shilimkar
Date: Tue Feb 19 2013 - 05:31:40 EST

On Monday 18 February 2013 05:08 PM, Afzal Mohammed wrote:
Describe minimal DT boot machine details for AM43 based SoC's. AM43
family of SoC's are ARM Cortex-A9 based with one core in SMP
configuration. Low level debug could be achieved by selecting
DEBUG_AM33XXUART1. To boot AM43 SoC, this change is sufficient w.r.t
Kernel (considering the fact that strictly speaking DT sources does
not classify as a part of Kernel). Here private timer of the one and
only core is being used as clock event (as well as, as time source).

Signed-off-by: Afzal Mohammed <afzal@xxxxxx>
As discussed already, lets just call this as Cortex-A9 single core
machine to avoid confusion.

arch/arm/mach-omap2/board-generic.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c
index 0274ff7..e083f08 100644
--- a/arch/arm/mach-omap2/board-generic.c
+++ b/arch/arm/mach-omap2/board-generic.c
@@ -15,7 +15,10 @@
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/irqdomain.h>
+#include <linux/irqchip.h>

+#include <asm/mach/map.h>
+#include <asm/smp_twd.h>
#include <asm/mach/arch.h>

#include "common.h"
@@ -182,3 +185,18 @@ DT_MACHINE_START(OMAP5_DT, "Generic OMAP5 (Flattened Device Tree)")
.restart = omap44xx_restart,
+#ifdef CONFIG_SOC_AM43
+static const char *am43_boards_compat[] __initdata = {
+ "ti,am43",
+DT_MACHINE_START(AM43_DT, "Generic AM43 (Flattened Device Tree)")
+ .map_io = debug_ll_io_init,
+ .init_irq = irqchip_init,
With Arnds patch [1], the above can be dropped..

+ .init_machine = omap_generic_init,
+ .init_time = twd_local_timer_of_register,
This one needs to take care of other timers as well from start. So
better to take that approach from start.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at