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authorZhichang Yuan <yuanzhichang@hisilicon.com>2018-03-21 17:23:02 -0500
committerBjorn Helgaas <helgaas@kernel.org>2018-04-04 08:42:48 -0500
commitadf38bb0b5956ab5469acb1ca981a9287c7ad1d8 (patch)
treec08d2e7f88c69883ae7aff65647e0c9d9589e928 /drivers/bus/Kconfig
parent65af618d2c559f8eb19d80d03a23029651a59de4 (diff)
downloadlinux-adf38bb0b5956ab5469acb1ca981a9287c7ad1d8.tar.bz2
HISI LPC: Support the LPC host on Hip06/Hip07 with DT bindings
The low-pin-count (LPC) interface of Hip06/Hip07 accesses I/O port space of peripherals. Implement the LPC host controller driver which performs the I/O operations on the underlying hardware. We don't want to touch existing drivers such as ipmi-bt, so this driver applies the indirect-IO introduced in the previous patch after registering an indirect-IO node to the indirect-IO devices list which will be searched by the I/O accessors to retrieve the host-local I/O port. The driver config is set as a bool instead of a tristate. The reason here is that, by the very nature of the driver providing a logical PIO range, it does not make sense to have this driver as a loadable module. Another more specific reason is that the Huawei D03 board which includes Hip06 SoC requires the LPC bus for UART console, so should be built in. Tested-by: dann frazier <dann.frazier@canonical.com> Signed-off-by: Zou Rongrong <zourongrong@huawei.com> Signed-off-by: Zhichang Yuan <yuanzhichang@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Acked-by: Rob Herring <robh@kernel.org> # dts part
Diffstat (limited to 'drivers/bus/Kconfig')
-rw-r--r--drivers/bus/Kconfig8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig
index 57e011d36a79..a3fad0f0292f 100644
--- a/drivers/bus/Kconfig
+++ b/drivers/bus/Kconfig
@@ -65,6 +65,14 @@ config BRCMSTB_GISB_ARB
arbiter. This driver provides timeout and target abort error handling
and internal bus master decoding.
+config HISILICON_LPC
+ bool "Support for ISA I/O space on HiSilicon Hip06/7"
+ depends on ARM64 && (ARCH_HISI || COMPILE_TEST)
+ select INDIRECT_PIO
+ help
+ Driver to enable I/O access to devices attached to the Low Pin
+ Count bus on the HiSilicon Hip06/7 SoC.
+
config IMX_WEIM
bool "Freescale EIM DRIVER"
depends on ARCH_MXC