diff options
| author | MaJun <majun258@huawei.com> | 2016-03-17 16:34:00 +0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-03-21 11:24:10 +0100 |
| commit | d0e286415dc1f4fea2971d6186b0775c7062575b (patch) | |
| tree | 463bff92457de600485e01c7585b56525d0fa347 /Documentation | |
| parent | 46f920d8a970cf102e18f25814a4ff4729ad8537 (diff) | |
| download | linux-d0e286415dc1f4fea2971d6186b0775c7062575b.tar.bz2 | |
irqchip/mbigen: Adjust DT bindings to handle multiple devices in a module
A mbigen hardware module can contain more than one device node. These device
nodes contain the same register definition.
mbigen_dev1:intc_dev1 {
...
reg = <0x0 0xc0080000 0x0 0x10000>;
...
};
mbigen_dev2:intc_dev2 {
...
reg = <0x0 0xc0080000 0x0 0x10000>;
...
};
In this case both devices try to request the same resource resulting in a
resource conflict.
To address this problem the devices need to be subnodes of the mbigen hardware
module, which then contains the unique register space.
[ tglx: Massaged changelog ]
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Ma Jun <majun258@huawei.com>
Cc: jason@lakedaemon.net
Cc: marc.zyngier@arm.com
Cc: Catalin.Marinas@arm.com
Cc: guohanjun@huawei.com
Cc: Will.Deacon@arm.com
Cc: huxinwei@huawei.com
Cc: lizefan@huawei.com
Cc: dingtianhong@huawei.com
Cc: zhaojunhua@hisilicon.com
Cc: liguozhu@hisilicon.com
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20160203111602.GA1234@leverpostej
Link: http://lkml.kernel.org/r/1458203641-17172-2-git-send-email-majun258@huawei.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/interrupt-controller/hisilicon,mbigen-v2.txt | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/Documentation/devicetree/bindings/interrupt-controller/hisilicon,mbigen-v2.txt b/Documentation/devicetree/bindings/interrupt-controller/hisilicon,mbigen-v2.txt index 720f7c92e9a1..3b2f4c43ad8d 100644 --- a/Documentation/devicetree/bindings/interrupt-controller/hisilicon,mbigen-v2.txt +++ b/Documentation/devicetree/bindings/interrupt-controller/hisilicon,mbigen-v2.txt @@ -21,6 +21,8 @@ Mbigen main node required properties: - reg: Specifies the base physical address and size of the Mbigen registers. +Mbigen sub node required properties: +------------------------------------------ - interrupt controller: Identifies the node as an interrupt controller - msi-parent: Specifies the MSI controller this mbigen use. @@ -45,13 +47,23 @@ Mbigen main node required properties: Examples: - mbigen_device_gmac:intc { + mbigen_chip_dsa { compatible = "hisilicon,mbigen-v2"; reg = <0x0 0xc0080000 0x0 0x10000>; - interrupt-controller; - msi-parent = <&its_dsa 0x40b1c>; - num-pins = <9>; - #interrupt-cells = <2>; + + mbigen_gmac:intc_gmac { + interrupt-controller; + msi-parent = <&its_dsa 0x40b1c>; + num-pins = <9>; + #interrupt-cells = <2>; + }; + + mbigen_i2c:intc_i2c { + interrupt-controller; + msi-parent = <&its_dsa 0x40b0e>; + num-pins = <2>; + #interrupt-cells = <2>; + }; }; Devices connect to mbigen required properties: |