Hello Simon,
Am 05.02.2020 um 18:59 schrieb Simon Glass:
Hi Heiko,
On Wed, 5 Feb 2020 at 02:04, Heiko Schocher <h...@denx.de> wrote:
Hello Bin, Simon,
I just porting the mpc83xx based kmcoge5ne board support DTS and got
problems using the serial ns16550 driver.
I need the serial driver before rolcation, so I enabled
"u-boot,dm-pre-reloc;" as usual in the device tree, but board does not
boot ...
I found the commit:
commit 4687919684e0e4390b9fc20d1809ecaa9dc3cb81
Author: Bin Meng <bmeng...@gmail.com>
Date: Wed Oct 24 06:36:36 2018 -0700
serial: Remove DM_FLAG_PRE_RELOC flag in various drivers
which added to the ns16550 serial driver:
diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index 04b604fa2c..1e6fc6c668 100644
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -487,7 +487,9 @@ U_BOOT_DRIVER(ns16550_serial) = {
.priv_auto_alloc_size = sizeof(struct NS16550),
.probe = ns16550_serial_probe,
.ops = &ns16550_serial_ops,
+#if !CONFIG_IS_ENABLED(OF_CONTROL)
.flags = DM_FLAG_PRE_RELOC,
+#endif
};
#endif
#endif /* SERIAL_PRESENT */
So, as OF_CONTROL is defined for me, the flag "u-boot,dm-pre-reloc" seems
not working anymore ...
Adding this back:
hs@xmglap:u-boot-secu [20200205-temp] $ git diff
diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index 9851663dc5..386ca9cffa 100644
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -528,7 +528,7 @@ U_BOOT_DRIVER(ns16550_serial) = {
.priv_auto_alloc_size = sizeof(struct NS16550),
.probe = ns16550_serial_probe,
.ops = &ns16550_serial_ops,
-#if !CONFIG_IS_ENABLED(OF_CONTROL)
+#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
.flags = DM_FLAG_PRE_RELOC,
#endif
};
and board boots fine with the flag "u-boot,dm-pre-reloc" in DTS ...
May I do something wrong here? I found in mainline for example
the "arch/powerpc/dts/gdsys/gazerbeam-uboot.dtsi" board, which
has the exactly same dts settings than I have now.
@Dirk: Can you check, if this board boots with current mainline?
Shouldn;t be the logic, that in case OF_CONTROL is enabled and if
flag "u-boot,dm-pre-reloc" is set in DTS for the device, the device
should be bound before relocation, and we do not need to check, if
the driver sets DM_FLAG_PRE_RELOC ?
But may I miss here something ...
Any hints?
+Tom Rini
I found I needed this for rpi.
http://patchwork.ozlabs.org/patch/1202913/
But I still haven't gone back to figure out why Tom doesn't.
Hmm... I have added the "u-boot,dm-pre-reloc;" to the uart node.
Like it is for the gazerbeam board, see [1]
It works if "DM_FLAG_PRE_RELOC" is set the driver in flags... no
need for a gpio node before relocation like it is inabove patch.
I wonder if we need DM_FLAG_PRE_RELOC at all in a driver and
OF_CONTROL case. Shouldn't it be enough if the DTB node for the
driver contains the "u-boot,dm-pre-reloc;" property?
bye,
Heiko
[1]
https://gitlab.denx.de/u-boot/u-boot/blob/master/arch/powerpc/dts/gdsys/gazerbeam-uboot.dtsi#L238
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