bus: uniphier-system-bus: add UniPhier System Bus driver

Since commit 1517126fda ("ARM: uniphier: select DM_ETH"), DM-based
drivers/net/smc911x.c is compiled, but it is never probed because the
parent node lacks the DM-based driver.

I need a skeleton driver to populate child devices (but the next commit
will move more hardware settings to the this driver).

I put this to drivers/bus/uniphier-system-bus.c because this is the
same path as the driver in Linux kernel.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Masahiro Yamada 2020-07-09 15:08:18 +09:00
parent d69d49d3ec
commit e2bb0be2fc
6 changed files with 40 additions and 0 deletions

View file

@ -83,6 +83,7 @@ config CACHE_UNIPHIER
config MICRO_SUPPORT_CARD
bool "Use Micro Support Card"
depends on UNIPHIER_SYSTEM_BUS
help
This option provides support for the expansion board, available
on some UniPhier reference boards.

View file

@ -10,6 +10,8 @@ source "drivers/ata/Kconfig"
source "drivers/axi/Kconfig"
source "drivers/bus/Kconfig"
source "drivers/block/Kconfig"
source "drivers/bootcount/Kconfig"

View file

@ -74,6 +74,7 @@ ifeq ($(CONFIG_SPL_BUILD)$(CONFIG_TPL_BUILD),)
obj-y += adc/
obj-y += ata/
obj-y += bus/
obj-$(CONFIG_DM_DEMO) += demo/
obj-$(CONFIG_BIOSEMU) += bios_emulator/
obj-y += block/

16
drivers/bus/Kconfig Normal file
View file

@ -0,0 +1,16 @@
# SPDX-License-Identifier: GPL-2.0
#
# Bus Devices
#
menu "Bus devices"
config UNIPHIER_SYSTEM_BUS
bool "UniPhier System Bus driver"
depends on ARCH_UNIPHIER
default y
help
Support for UniPhier System Bus, a simple external bus. This is
needed to use on-board devices connected to UniPhier SoCs.
endmenu

6
drivers/bus/Makefile Normal file
View file

@ -0,0 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
#
# Makefile for the bus drivers.
#
obj-$(CONFIG_UNIPHIER_SYSTEM_BUS) += uniphier-system-bus.o

View file

@ -0,0 +1,14 @@
// SPDX-License-Identifier: GPL-2.0-or-later
#include <dm.h>
static const struct udevice_id uniphier_system_bus_match[] = {
{ .compatible = "socionext,uniphier-system-bus" },
{ /* sentinel */ }
};
U_BOOT_DRIVER(uniphier_system_bus_driver) = {
.name = "uniphier-system-bus",
.id = UCLASS_SIMPLE_BUS,
.of_match = uniphier_system_bus_match,
};