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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-25 03:53:42 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-25 03:53:42 -0300
commit03dd4cb26d967f9588437b0fc9cc0e8353322bb7 (patch)
treefa581f6dc1c0596391690d1f67eceef3af8246dc /arch/arm/mach-omap2/board-generic.c
parentd4e493caf788ef44982e131ff9c786546904d934 (diff)
Linux-libre 4.5-gnu
Diffstat (limited to 'arch/arm/mach-omap2/board-generic.c')
-rw-r--r--arch/arm/mach-omap2/board-generic.c32
1 files changed, 31 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c
index 04a56cc04..bab814d2f 100644
--- a/arch/arm/mach-omap2/board-generic.c
+++ b/arch/arm/mach-omap2/board-generic.c
@@ -16,7 +16,9 @@
#include <linux/of_platform.h>
#include <linux/irqdomain.h>
+#include <asm/setup.h>
#include <asm/mach/arch.h>
+#include <asm/system_info.h>
#include "common.h"
@@ -76,8 +78,36 @@ static const char *const n900_boards_compat[] __initconst = {
NULL,
};
+/* Set system_rev from atags */
+static void __init rx51_set_system_rev(const struct tag *tags)
+{
+ const struct tag *tag;
+
+ if (tags->hdr.tag != ATAG_CORE)
+ return;
+
+ for_each_tag(tag, tags) {
+ if (tag->hdr.tag == ATAG_REVISION) {
+ system_rev = tag->u.revision.rev;
+ break;
+ }
+ }
+}
+
+/* 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)
+{
+ const struct tag *tags = (const struct tag *)(PAGE_OFFSET + 0x100);
+
+ save_atags(tags);
+ rx51_set_system_rev(tags);
+ 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,