Hello Chris,
Am 09.06.22 um 09:20 schrieb Chris Johns:
OK push.
Thanks.
(I am not familiar with these devices so ...) Is the needed device tree
fragments easily available to the user?
The device tree for the i.MX6 and i.MX7 series are basically just the
ones from FreeBSD or Linux. So there are a lot of examples available.
With the additional hints that I added with this patch, it should be
possible to create one that is working well for a custom board.
Best regards
Christian
Thanks
Chris
On 9/6/2022 5:03 pm, Christian Mauderer wrote:
This adds information how to use a second Ethernet controller on the
i.MX BSPs.
---
user/bsps/arm/imx.rst | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/user/bsps/arm/imx.rst b/user/bsps/arm/imx.rst
index ee98f0b..e2fd7f2 100644
--- a/user/bsps/arm/imx.rst
+++ b/user/bsps/arm/imx.rst
@@ -174,6 +174,23 @@ config like that:
SYSINIT_DRIVER_REFERENCE(ksz8091rnb, miibus);
#include <machine/rtems-bsd-config.h>
+On chips with two Ethernet controllers, the MDIO lines are shared between the
+two controllers for a number of chips variants. This is currently supported
with
+some restrictions on the initialization order. For this configuration to work,
+you have to make sure that the pins are assigned to the Ethernet controller
that
+is initialized first. The initialization order in `libbsd` depends on the order
+of the Ethernet controllers in the device tree. So if (for example) `fec2` is
+defined in the device tree sources before `fec1`, make sure that the MDIO lines
+are routed to `fec2` and that the Ethernet PHYs are a sub-node of `fec2` in the
+device tree.
+
+Note that the clock for the second Ethernet controller is not necessarily
+enabled in the `CCM`. On the i.MX6UL/ULL, the clock will be enabled by the
+startup code if the node that is compatible with `fsl,imx6ul-anatop` can be
+found in the device tree. If you have trouble with the second Ethernet
+controller make sure that the `ENET2_125M_EN` bit in the `CCM_ANALOG_PLL_ENET`
+register is set as expected.
+
MMC/SDCard Driver
-----------------
--
--------------------------------------------
embedded brains GmbH
Herr Christian MAUDERER
Dornierstr. 4
82178 Puchheim
Germany
email: christian.maude...@embedded-brains.de
phone: +49-89-18 94 741 - 18
fax: +49-89-18 94 741 - 08
Registergericht: Amtsgericht München
Registernummer: HRB 157899
Vertretungsberechtigte Geschäftsführer: Peter Rasmussen, Thomas Dörfler
Unsere Datenschutzerklärung finden Sie hier:
https://embedded-brains.de/datenschutzerklaerung/
_______________________________________________
devel mailing list
devel@rtems.org
http://lists.rtems.org/mailman/listinfo/devel
