pinctrl: Amend bindings for STM32 pinctrl
Adds "ngpios" and "gpio-ranges" bindings definition. Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
parent
117bd6e842
commit
d4168be73c
|
@ -38,8 +38,23 @@ Optional properties:
|
|||
- st,syscfg: Should be phandle/offset pair. The phandle to the syscon node
|
||||
which includes IRQ mux selection register, and the offset of the IRQ mux
|
||||
selection register.
|
||||
- ngpios: Number of gpios in a bank (to use if bank gpio numbers is less
|
||||
than 16).
|
||||
- gpio-ranges: Define a dedicated mapping between a pin-controller and
|
||||
a gpio controller. Format is <&phandle a b c> with:
|
||||
-(phandle): phandle of pin-controller.
|
||||
-(a): gpio base offset in range.
|
||||
-(b): pin base offset in range.
|
||||
-(c): gpio count in range
|
||||
This entry has to be used either if there are holes inside a bank:
|
||||
GPIOB0/B1/B2/B14/B15 (see example 2)
|
||||
or if banks are not contiguous:
|
||||
GPIOA/B/C/E...
|
||||
NOTE: If "gpio-ranges" is used for a gpio controller, all gpio-controller
|
||||
have to use a "gpio-ranges" entry.
|
||||
More details in Documentation/devicetree/bindings/gpio/gpio.txt.
|
||||
|
||||
Example:
|
||||
Example 1:
|
||||
#include <dt-bindings/pinctrl/stm32f429-pinfunc.h>
|
||||
...
|
||||
|
||||
|
@ -61,6 +76,43 @@ Example:
|
|||
pin-functions nodes follow...
|
||||
};
|
||||
|
||||
Example 2:
|
||||
#include <dt-bindings/pinctrl/stm32f429-pinfunc.h>
|
||||
...
|
||||
|
||||
pinctrl: pin-controller {
|
||||
#address-cells = <1>;
|
||||
#size-cells = <1>;
|
||||
compatible = "st,stm32f429-pinctrl";
|
||||
ranges = <0 0x40020000 0x3000>;
|
||||
pins-are-numbered;
|
||||
|
||||
gpioa: gpio@40020000 {
|
||||
gpio-controller;
|
||||
#gpio-cells = <2>;
|
||||
reg = <0x0 0x400>;
|
||||
resets = <&reset_ahb1 0>;
|
||||
st,bank-name = "GPIOA";
|
||||
gpio-ranges = <&pinctrl 0 0 16>;
|
||||
};
|
||||
|
||||
gpiob: gpio@40020400 {
|
||||
gpio-controller;
|
||||
#gpio-cells = <2>;
|
||||
reg = <0x0 0x400>;
|
||||
resets = <&reset_ahb1 0>;
|
||||
st,bank-name = "GPIOB";
|
||||
ngpios = 4;
|
||||
gpio-ranges = <&pinctrl 0 16 3>,
|
||||
<&pinctrl 14 30 2>;
|
||||
};
|
||||
|
||||
|
||||
...
|
||||
pin-functions nodes follow...
|
||||
};
|
||||
|
||||
|
||||
Contents of function subnode node:
|
||||
----------------------------------
|
||||
Subnode format
|
||||
|
|
Loading…
Reference in New Issue