1c1bd9a018
STM32F401 allows for upto 16 alternate functions on each pin. Change-Id: Ib1c14fd31abaa2b05a5ab0f7bd1b4a4748f10f84 Signed-off-by: Ricardo Salveti <ricardo.salveti@linaro.org> Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org> Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
/*
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* Copyright (c) 2016 Linaro Limited.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <errno.h>
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#include "soc.h"
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#include <device.h>
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#include <misc/util.h>
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#include <pinmux/stm32/pinmux_stm32.h>
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#include <drivers/clock_control/stm32_clock_control.h>
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static const stm32_pin_func_t pin_pb6_funcs[] = {
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[STM32F4_PINMUX_FUNC_PB6_USART1_TX - 1] =
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STM32F4X_PIN_CONFIG_AF_PUSH_UP,
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};
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static const stm32_pin_func_t pin_pb7_funcs[] = {
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[STM32F4_PINMUX_FUNC_PB7_USART1_RX - 1] =
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STM32F4X_PIN_CONFIG_AF_PUSH_UP,
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};
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static const stm32_pin_func_t pin_pa2_funcs[] = {
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[STM32F4_PINMUX_FUNC_PA2_USART2_TX - 1] =
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STM32F4X_PIN_CONFIG_AF_PUSH_UP,
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};
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static const stm32_pin_func_t pin_pa3_funcs[] = {
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[STM32F4_PINMUX_FUNC_PA3_USART2_RX - 1] =
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STM32F4X_PIN_CONFIG_AF_PUSH_UP,
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};
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/**
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* @brief pin configuration
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*/
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static const struct stm32_pinmux_conf pins[] = {
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STM32_PIN_CONF(STM32_PIN_PB6, pin_pb6_funcs),
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STM32_PIN_CONF(STM32_PIN_PB7, pin_pb7_funcs),
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STM32_PIN_CONF(STM32_PIN_PA2, pin_pa2_funcs),
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STM32_PIN_CONF(STM32_PIN_PA3, pin_pa3_funcs),
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};
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int stm32_get_pin_config(int pin, int func)
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{
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/* GPIO function is always available, to save space it is not
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* listed in alternate functions array
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*/
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if (func == STM32_PINMUX_FUNC_GPIO) {
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return STM32F4X_PIN_CONFIG_BIAS_HIGH_IMPEDANCE;
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}
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/* analog function is another 'known' setting */
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if (func == STM32_PINMUX_FUNC_ANALOG) {
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return STM32F4X_PIN_CONFIG_ANALOG;
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}
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func -= 1;
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for (int i = 0; i < ARRAY_SIZE(pins); i++) {
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if (pins[i].pin == pin) {
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if (func > pins[i].nfuncs) {
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return -EINVAL;
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}
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return pins[i].funcs[func];
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}
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}
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return -EINVAL;
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}
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