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riscv: qemu: Remove the simple-bus driver for the SoC node

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Prior to QEMU v3.1.0, QEMU generated the 'virt' SoC node with a
"riscv-virtio-soc" compatible string, and a "simple-bus" driver
was created to accommodate that special case in U-Boot.

Starting from QEMU v3.1.0, the SoC node was set as a "simple-bus",
hence the special simple-bus driver is no longer needed.

Update the doc to mention the latest tested QEMU version 4.2.0.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Bin Meng 2020-04-16 08:09:28 -07:00 committed by Andes
parent 846b612014
commit ed1475e2f4
2 changed files with 1 additions and 15 deletions
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14
arch/riscv/cpu/generic/cpu.c
View file

@ -4,7 +4,6 @@
*/
#include <common.h>
#include <dm.h>
#include <irq_func.h>
/*
@ -21,16 +20,3 @@ int cleanup_before_linux(void)
return 0;
}
/* To enumerate devices on the /soc/ node, create a "simple-bus" driver */
static const struct udevice_id riscv_virtio_soc_ids[] = {
{ .compatible = "riscv-virtio-soc" },
{ }
};
U_BOOT_DRIVER(riscv_virtio_soc) = {
.name = "riscv_virtio_soc",
.id = UCLASS_SIMPLE_BUS,
.of_match = riscv_virtio_soc_ids,
.flags = DM_FLAG_PRE_RELOC,
};

2
doc/board/emulation/qemu-riscv.rst
View file

@ -56,7 +56,7 @@ For instructions on how to run U-Boot in supervisor mode on QEMU
with OpenSBI, see the documentation available with OpenSBI:
https://github.com/riscv/opensbi/blob/master/docs/platform/qemu_virt.md
These have been tested in QEMU 3.0.0.
These have been tested in QEMU 4.2.0.
Running U-Boot SPL
------------------