AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-14 19:36:39 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

dt-bindings: pinctrl: bcm4708-pinmux: rework binding to use syscon

Browse Source 
As pointed by Rob, CRU is a kind of block that can't be guaranteed to
have everything exposed as subnodes. It's a set of various registers
that aren't tied to any single device. It could be described much more
accurately as MFD (Multi-Function Device).

Some hardware blocks may indeed want to access a register or two of the
CRU which requires describing it as the "syscon".

While at it replace exmple node name with the standard "pinctrl" (also
pointed out by Rob).

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Rafał Miłecki 2018-12-18 16:57:44 +01:00 committed by Linus Walleij
parent 6ac5af6ec1
commit 2ae80900f2
1 changed files with 7 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
Documentation/devicetree/bindings/pinctrl/brcm,bcm4708-pinmux.txt
View File

@ -7,13 +7,15 @@ configure controller correctly.
A list of pins varies across chipsets so few bindings are available.
Node of the pinmux must be nested in the CRU (Central Resource Unit) "syscon"
noce.
Required properties:
- compatible: must be one of:
"brcm,bcm4708-pinmux"
"brcm,bcm4709-pinmux"
"brcm,bcm53012-pinmux"
- reg: iomem address range of CRU (Central Resource Unit) pin registers
- reg-names: "cru_gpio_control" - the only needed & supported reg right now
- offset: offset of pin registers in the CRU block
Functions and their groups available for all chipsets:
- "spi": "spi_grp"
@ -37,16 +39,12 @@ Example:
#size-cells = <1>;
cru@100 {
compatible = "simple-bus";
compatible = "syscon", "simple-mfd";
reg = <0x100 0x1a4>;
ranges;
#address-cells = <1>;
#size-cells = <1>;
pin-controller@1c0 {
pinctrl {
compatible = "brcm,bcm4708-pinmux";
reg = <0x1c0 0x24>;
reg-names = "cru_gpio_control";
offset = <0xc0>;
spi-pins {
function = "spi";