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Diffstat (limited to 'dts/Bindings/pinctrl/st,stm32-pinctrl.txt')
| -rw-r--r-- | dts/Bindings/pinctrl/st,stm32-pinctrl.txt | 208 |
1 files changed, 0 insertions, 208 deletions
diff --git a/dts/Bindings/pinctrl/st,stm32-pinctrl.txt b/dts/Bindings/pinctrl/st,stm32-pinctrl.txt deleted file mode 100644 index 00169255e4..0000000000 --- a/dts/Bindings/pinctrl/st,stm32-pinctrl.txt +++ /dev/null @@ -1,208 +0,0 @@ -* STM32 GPIO and Pin Mux/Config controller - -STMicroelectronics's STM32 MCUs intregrate a GPIO and Pin mux/config hardware -controller. It controls the input/output settings on the available pins and -also provides ability to multiplex and configure the output of various on-chip -controllers onto these pads. - -Pin controller node: -Required properies: - - compatible: value should be one of the following: - "st,stm32f429-pinctrl" - "st,stm32f469-pinctrl" - "st,stm32f746-pinctrl" - "st,stm32f769-pinctrl" - "st,stm32h743-pinctrl" - "st,stm32mp157-pinctrl" - "st,stm32mp157-z-pinctrl" - - #address-cells: The value of this property must be 1 - - #size-cells : The value of this property must be 1 - - ranges : defines mapping between pin controller node (parent) to - gpio-bank node (children). - - pins-are-numbered: Specify the subnodes are using numbered pinmux to - specify pins. - -GPIO controller/bank node: -Required properties: - - gpio-controller : Indicates this device is a GPIO controller - - #gpio-cells : Should be two. - The first cell is the pin number - The second one is the polarity: - - 0 for active high - - 1 for active low - - reg : The gpio address range, relative to the pinctrl range - - clocks : clock that drives this bank - - st,bank-name : Should be a name string for this bank as specified in - the datasheet - -Optional properties: - - reset: : Reference to the reset controller - - st,syscfg: Should be phandle/offset/mask. - -The phandle to the syscon node which includes IRQ mux selection register. - -The offset of the IRQ mux selection register - -The field mask of IRQ mux, needed if different of 0xf. - - 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. - - st,bank-ioport: should correspond to the EXTI IOport selection (EXTI line - used to select GPIOs as interrupts). - - hwlocks: reference to a phandle of a hardware spinlock provider node. - - st,package: Indicates the SOC package used. - More details in include/dt-bindings/pinctrl/stm32-pinfunc.h - -Example 1: -#include <dt-bindings/pinctrl/stm32f429-pinfunc.h> -... - - 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"; - }; - ... - 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 -A pinctrl node should contain at least one subnode representing the -pinctrl group available on the machine. Each subnode will list the -pins it needs, and how they should be configured, with regard to muxer -configuration, pullups, drive, output high/low and output speed. - - node { - pinmux = <PIN_NUMBER_PINMUX>; - GENERIC_PINCONFIG; - }; - -Required properties: -- pinmux: integer array, represents gpio pin number and mux setting. - Supported pin number and mux varies for different SoCs, and are defined in - dt-bindings/pinctrl/<soc>-pinfunc.h directly. - These defines are calculated as: - ((port * 16 + line) << 8) | function - With: - - port: The gpio port index (PA = 0, PB = 1, ..., PK = 11) - - line: The line offset within the port (PA0 = 0, PA1 = 1, ..., PA15 = 15) - - function: The function number, can be: - * 0 : GPIO - * 1 : Alternate Function 0 - * 2 : Alternate Function 1 - * 3 : Alternate Function 2 - * ... - * 16 : Alternate Function 15 - * 17 : Analog - - To simplify the usage, macro is available to generate "pinmux" field. - This macro is available here: - - include/dt-bindings/pinctrl/stm32-pinfunc.h - - Some examples of using macro: - /* GPIO A9 set as alernate function 2 */ - ... { - pinmux = <STM32_PINMUX('A', 9, AF2)>; - }; - /* GPIO A9 set as GPIO */ - ... { - pinmux = <STM32_PINMUX('A', 9, GPIO)>; - }; - /* GPIO A9 set as analog */ - ... { - pinmux = <STM32_PINMUX('A', 9, ANALOG)>; - }; - -Optional properties: -- GENERIC_PINCONFIG: is the generic pinconfig options to use. - Available options are: - - bias-disable, - - bias-pull-down, - - bias-pull-up, - - drive-push-pull, - - drive-open-drain, - - output-low - - output-high - - slew-rate = <x>, with x being: - < 0 > : Low speed - < 1 > : Medium speed - < 2 > : Fast speed - < 3 > : High speed - -Example: - -pin-controller { -... - usart1_pins_a: usart1@0 { - pins1 { - pinmux = <STM32_PINMUX('A', 9, AF7)>; - bias-disable; - drive-push-pull; - slew-rate = <0>; - }; - pins2 { - pinmux = <STM32_PINMUX('A', 10, AF7)>; - bias-disable; - }; - }; -}; - -&usart1 { - pinctrl-0 = <&usart1_pins_a>; - pinctrl-names = "default"; -}; |