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dt-bindings: pinctrl: bcm4708-pinmux: improve example binding

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Broadcom SoC pins are controlled using CRU ("Clock and Reset Unit" or
"Central Resource Unit") registers. There are more CRU registers and
functions so CRU should be represented as a separated block in DT.

Moreover CRU is a sub-block of DMU ("Device Management Unit") so that
one should also get its own node.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Rafał Miłecki 2018-10-15 11:30:13 +02:00 • committed by Linus Walleij
parent ce96a3a041
commit 93d39737b2
1 changed files with 22 additions and 7 deletions
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29
Documentation/devicetree/bindings/pinctrl/brcm,bcm4708-pinmux.txt
View file

@ -30,13 +30,28 @@ For documentation of subnodes see:
Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
Example:
pinctrl@1800c1c0 {
compatible = "brcm,bcm4708-pinmux";
reg = <0x1800c1c0 0x24>;
reg-names = "cru_gpio_control";
dmu@1800c000 {
compatible = "simple-bus";
ranges = <0 0x1800c000 0x1000>;
#address-cells = <1>;
#size-cells = <1>;
spi {
function = "spi";
groups = "spi_grp";
cru@100 {
compatible = "simple-bus";
reg = <0x100 0x1a4>;
ranges;
#address-cells = <1>;
#size-cells = <1>;
pin-controller@1c0 {
compatible = "brcm,bcm4708-pinmux";
reg = <0x1c0 0x24>;
reg-names = "cru_gpio_control";
spi-pins {
function = "spi";
groups = "spi_grp";
};
};
};
};