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76 lines
2.6 KiB
76 lines
2.6 KiB
/* |
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* Copyright (c) 2025 Silicon Laboratories Inc. |
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* |
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* SPDX-License-Identifier: Apache-2.0 |
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*/ |
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#include <zephyr/drivers/pinctrl.h> |
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#include <rail.h> |
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#define DT_DRV_COMPAT silabs_pti |
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struct silabs_pti_config { |
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const struct pinctrl_dev_config *pcfg; |
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RAIL_PtiMode_t mode; |
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uint32_t baud; |
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}; |
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int silabs_pti_init(const struct device *dev) |
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{ |
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const struct silabs_pti_config *config = dev->config; |
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const struct pinctrl_state *state; |
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RAIL_PtiConfig_t pti_config = { |
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.mode = config->mode, |
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.baud = config->baud, |
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}; |
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RAIL_Status_t status; |
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int err; |
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/* The RAIL API to configure PTI requires GPIO port and pin as part of its configuration |
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* struct, and does the pin configuration itself internally. Create the configuration |
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* struct from the pinctrl node instead of using pinctrl_apply_state(). |
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*/ |
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err = pinctrl_lookup_state(config->pcfg, PINCTRL_STATE_DEFAULT, &state); |
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if (err < 0) { |
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return err; |
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} |
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for (int i = 0; i < state->pin_cnt; i++) { |
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switch (state->pins[i].en_bit) { |
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case _GPIO_FRC_ROUTEEN_DCLKPEN_SHIFT: |
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pti_config.dclkPort = state->pins[i].port; |
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pti_config.dclkPin = state->pins[i].pin; |
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break; |
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case _GPIO_FRC_ROUTEEN_DFRAMEPEN_SHIFT: |
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pti_config.dframePort = state->pins[i].port; |
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pti_config.dframePin = state->pins[i].pin; |
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break; |
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case _GPIO_FRC_ROUTEEN_DOUTPEN_SHIFT: |
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pti_config.doutPort = state->pins[i].port; |
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pti_config.doutPin = state->pins[i].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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} |
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status = RAIL_ConfigPti(RAIL_EFR32_HANDLE, &pti_config); |
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if (status != RAIL_STATUS_NO_ERROR) { |
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return -EIO; |
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} |
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return 0; |
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} |
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#define SILABS_PTI_INIT(idx) \ |
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PINCTRL_DT_INST_DEFINE(idx); \ |
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\ |
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static const struct silabs_pti_config silabs_pti_config_##idx = { \ |
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.pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(idx), \ |
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.mode = DT_INST_ENUM_IDX(idx, mode), \ |
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.baud = DT_INST_PROP(idx, clock_frequency), \ |
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}; \ |
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\ |
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DEVICE_DT_INST_DEFINE(idx, &silabs_pti_init, NULL, NULL, &silabs_pti_config_##idx, \ |
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POST_KERNEL, CONFIG_DEBUG_DRIVER_INIT_PRIORITY, NULL); |
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DT_INST_FOREACH_STATUS_OKAY(SILABS_PTI_INIT)
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