meson: Add soc_rev to environment

Add SoC revision to environment. This can be useful to select the
correct device tree at runtime (N2/N2+).

Signed-off-by: Pascal Vizeli <pvizeli@syshack.ch>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/arch/arm/mach-meson/board-info.c b/arch/arm/mach-meson/board-info.c
index a0bcf38f29..90e7dfaa3c 100644
--- a/arch/arm/mach-meson/board-info.c
+++ b/arch/arm/mach-meson/board-info.c
@@ -187,3 +187,15 @@ int show_board_info(void)
 
 	return 0;
 }
+
+int meson_get_soc_rev(char *buff, size_t buff_len)
+{
+	unsigned int socinfo;
+
+	socinfo = get_socinfo();
+	if (!socinfo)
+		return -1;
+
+	/* Write SoC info */
+	return snprintf(buff, buff_len, "%x", socinfo_to_minor(socinfo));
+}