diff options
| author | Alexander Aring <alex.aring@gmail.com> | 2015-12-19 19:34:03 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2016-01-04 09:38:12 +0100 |
| commit | 8430b903308e2907845a67e182fbd4d3e44ed3fa (patch) | |
| tree | 15cc242800eb432b0f0a59c18f81b558fb7c6836 /arch/arm/boards/raspberry-pi | |
| parent | 801a8d40c1095588f315138988307ad5e33f1126 (diff) | |
| download | barebox-8430b903308e2907845a67e182fbd4d3e44ed3fa.tar.gz barebox-8430b903308e2907845a67e182fbd4d3e44ed3fa.tar.xz | |
rpi: sync revision detection with u-boot
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.aring@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/boards/raspberry-pi')
| -rw-r--r-- | arch/arm/boards/raspberry-pi/rpi.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm/boards/raspberry-pi/rpi.c b/arch/arm/boards/raspberry-pi/rpi.c index f9406d4623..faf48a55cd 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); |