This patch adds parts from u-boot code for doing RPi revision detection
and take care about the "warranty bit". I got this bit on my RPi2.
Signed-off-by: Alexander Aring <alex.ar...@gmail.com>
---
arch/arm/boards/raspberry-pi/rpi.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/arch/arm/boards/raspberry-pi/rpi.c
b/arch/arm/boards/raspberry-pi/rpi.c
index f9406d4..faf48a5 100644
--- a/arch/arm/boards/raspberry-pi/rpi.c
+++ b/arch/arm/boards/raspberry-pi/rpi.c
@@ -203,7 +203,22 @@ static void rpi_get_board_rev(void)
return;
}
+ /* Comments from u-boot:
+ * For details of old-vs-new scheme, see:
+ * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
+ * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
+ * (a few posts down)
+ *
+ * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
+ * lower byte to use as the board rev:
+ *
http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
+ * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
+ */
rpi_board_rev = msg->get_board_rev.body.resp.rev;
+ if (rpi_board_rev & 0x800000)
+ rpi_board_rev = (rpi_board_rev >> 4) & 0xff;
+ else
+ rpi_board_rev &= 0xff;
if (rpi_board_rev >= ARRAY_SIZE(models)) {
printf("RPI: Board rev %u outside known range\n",
rpi_board_rev);
--
2.6.1
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