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authorIvaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>2016-01-01 14:49:36 +0300
committerRussell King <rmk+kernel@arm.linux.org.uk>2016-01-04 14:26:00 +0300
commit8c51b034938fb37b7ffc2e7c49a39b284f5c08c0 (patch)
tree9a3ed1552f7da64fd15bfb08bd956f76b5a19bcb /arch/arm/mach-omap2/board-generic.c
parent6e0306a97d18bb9bec71b1f3db0dbc6b14c5f51b (diff)
downloadlinux-8c51b034938fb37b7ffc2e7c49a39b284f5c08c0.tar.xz
ARM: 8496/1: OMAP: RX51: save ATAGS data in the early boot stage
This fixes a regression with device tree based booting compared to legacy booting for n900 to make the n900 legacy user space to also work with device tree based booting Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-omap2/board-generic.c')
-rw-r--r--arch/arm/mach-omap2/board-generic.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c
index 04a56cc04dfa..809827265fb3 100644
--- a/arch/arm/mach-omap2/board-generic.c
+++ b/arch/arm/mach-omap2/board-generic.c
@@ -16,6 +16,7 @@
#include <linux/of_platform.h>
#include <linux/irqdomain.h>
+#include <asm/setup.h>
#include <asm/mach/arch.h>
#include "common.h"
@@ -76,8 +77,17 @@ static const char *const n900_boards_compat[] __initconst = {
NULL,
};
+/* Legacy userspace on Nokia N900 needs ATAGS exported in /proc/atags,
+ * save them while the data is still not overwritten
+ */
+static void __init rx51_reserve(void)
+{
+ save_atags((const struct tag *)(PAGE_OFFSET + 0x100));
+ omap_reserve();
+}
+
DT_MACHINE_START(OMAP3_N900_DT, "Nokia RX-51 board")
- .reserve = omap_reserve,
+ .reserve = rx51_reserve,
.map_io = omap3_map_io,
.init_early = omap3430_init_early,
.init_machine = omap_generic_init,