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| author | Alexandre TORGUE <alexandre.torgue@st.com> | 2017-01-27 19:15:16 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-02-06 11:47:17 +0300 |
| commit | d4168be73c8fdc3e9cdc61aa4b513e6c9b7bcf10 (patch) | |
| tree | eb35d9d6250d59bf1f54c58b73144ef496f3a587 | |
| parent | 117bd6e842a8d52e48f0d18be260a05bf96dc854 (diff) | |
| download | linux-d4168be73c8fdc3e9cdc61aa4b513e6c9b7bcf10.tar.xz | |
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>
| -rw-r--r-- | Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.txt | 54 |
1 files changed, 53 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.txt index 620c09b3d801..eac20aa33907 100644 --- a/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.txt +++ b/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.txt @@ -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 |