Lines Matching +full:board +full:- +full:pinctrl

2 # SPDX-License-Identifier: Apache-2.0
7     states are composed by groups of pre-defined pin muxing definitions and user
10     Each Zephyr-based application has its own set of pin muxing/pin configuration
11     requirements. The next steps use ESP-WROVER-KIT's I2C_0 to illustrate how one
12     could change a node's pin state properties. Though based on a particular board,
13     the same steps can be tweaked to address specifics of any other target board.
15     Suppose an application running on top of the ESP-WROVER-KIT board, for some
17     that board's original device tree source file (i.e., 'esp_wrover_kit.dts'),
18     you'll notice that the I2C_0 node is already assigned to a pre-defined state.
22         #include "esp_wrover_kit-pinctrl.dtsi"
26                 pinctrl-0 = <&i2c0_default>;
27                 pinctrl-names = "default";
31     From the above excerpt, the pincrl-0 property is assigned the 'i2c0_default'
32     state value. This and other pin states of the board are defined on another file
33     (in this case, 'esp_wrover_kit-pinctrl.dtsi') on the same folder of the DTS file.
41                         bias-pull-up;
42                         drive-open-drain;
43                         output-high;
50     by your target hardware. For example, some custom board may have an external
51     pull-up resistor soldered to GPIO_21's pin pad, in which case, 'bias-pull-up'
68     https://github.com/zephyrproject-rtos/zephyr/tree/main/include/zephyr/dt-bindings/pinctrl
71     The ESP-WROVER-KIT board is based on the ESP32 SoC, in that case, we search
72     through the file 'esp32-pinctrl.h' in the above URL. Luckily for us, there is
80     Now, we go back to edit 'esp_wrover_kit-pinctrl.dtsi' and create a new pin state
89                         bias-pull-up;
90                         drive-open-drain;
91                         output-high;
104           bias-push-pull, drive-open-drain, etc) can be freely chosen, given the
113 compatible: "espressif,esp32-pinctrl"
117 child-binding:
120   child-binding:
125       - name: pincfg-node.yaml
126         property-allowlist:
127           - bias-disable
128           - bias-pull-down
129           - bias-pull-up
130           - drive-push-pull
131           - drive-open-drain
132           - input-enable
133           - output-enable
134           - output-high
135           - output-low
143           pin. The array elements are pre-declared macros taken from Espressif's