101 lines
1.9 KiB
C
101 lines
1.9 KiB
C
/*
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* Copyright (c) 2017 Intel Corporation
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* Copyright (c) 2021 Espressif Systems (Shanghai) Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define DT_DRV_COMPAT espressif_esp32_pinmux
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/* Include esp-idf headers first to avoid redefining BIT() macro */
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#include <soc/soc.h>
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#include <hal/gpio_types.h>
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#include <hal/gpio_ll.h>
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#include <errno.h>
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#include <drivers/pinmux.h>
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static int pinmux_set(const struct device *dev, uint32_t pin, uint32_t func)
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{
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ARG_UNUSED(dev);
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if ((func > PINMUX_FUNC_G) || (pin >= GPIO_NUM_MAX)) {
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return -EINVAL;
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}
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gpio_ll_iomux_func_sel(GPIO_PIN_MUX_REG[pin], func);
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return 0;
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}
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static int pinmux_get(const struct device *dev, uint32_t pin, uint32_t *func)
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{
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ARG_UNUSED(dev);
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if (pin >= GPIO_NUM_MAX) {
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return -EINVAL;
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}
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*func = REG_GET_FIELD(GPIO_PIN_MUX_REG[pin], MCU_SEL);
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return 0;
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}
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static int pinmux_pullup(const struct device *dev, uint32_t pin, uint8_t func)
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{
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ARG_UNUSED(dev);
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switch (func) {
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case PINMUX_PULLUP_DISABLE:
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gpio_ll_pullup_dis(&GPIO, pin);
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break;
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case PINMUX_PULLUP_ENABLE:
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gpio_ll_pullup_en(&GPIO, pin);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int pinmux_input(const struct device *dev, uint32_t pin, uint8_t func)
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{
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ARG_UNUSED(dev);
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switch (func) {
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case PINMUX_INPUT_ENABLED:
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gpio_ll_input_enable(&GPIO, pin);
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break;
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case PINMUX_OUTPUT_ENABLED:
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gpio_ll_output_enable(&GPIO, pin);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static struct pinmux_driver_api api_funcs = {
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.set = pinmux_set,
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.get = pinmux_get,
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.pullup = pinmux_pullup,
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.input = pinmux_input
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};
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static int pinmux_initialize(const struct device *dev)
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{
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ARG_UNUSED(dev);
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return 0;
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}
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/* Initialize using PRE_KERNEL_1 priority so that GPIO can use the pin
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* mux driver.
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*/
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DEVICE_DT_INST_DEFINE(0, &pinmux_initialize,
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NULL, NULL, NULL,
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PRE_KERNEL_2, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
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&api_funcs);
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