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https://github.com/zephyrproject-rtos/zephyr
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a3c0b03915
Add UART driver for Realtek RTS5912. Signed-off-by: Lin Yu-Cheng <lin_yu_cheng@realtek.com>
76 lines
2.9 KiB
C
76 lines
2.9 KiB
C
/*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Copyright (c) 2024 Realtek Semiconductor Corporation, SIBG-SD7
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* Author: Lin Yu-Cheng <lin_yu_cheng@realtek.com>
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*/
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#define DT_DRV_COMPAT realtek_rts5912_uart
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#include <zephyr/kernel.h>
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#include <zephyr/drivers/pinctrl.h>
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#include <zephyr/drivers/uart.h>
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#include <zephyr/drivers/gpio.h>
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#include <zephyr/drivers/clock_control.h>
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#include <zephyr/drivers/clock_control/clock_control_rts5912.h>
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(uart_rts5912, CONFIG_UART_LOG_LEVEL);
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BUILD_ASSERT(CONFIG_UART_RTS5912_INIT_PRIORITY < CONFIG_SERIAL_INIT_PRIORITY,
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"The uart_realtek_rts5912 driver must be initialized before the uart_ns16550 driver");
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/* device config */
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struct uart_rts5912_device_config {
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const struct pinctrl_dev_config *pcfg;
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const struct device *clk_dev;
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struct rts5912_sccon_subsys sccon_cfg;
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};
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/** Device data structure */
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struct uart_rts5912_dev_data {
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};
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static int rts5912_uart_init(const struct device *dev)
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{
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const struct uart_rts5912_device_config *const dev_cfg = dev->config;
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int rc;
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if (!device_is_ready(dev_cfg->clk_dev)) {
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return -ENODEV;
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}
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rc = clock_control_on(dev_cfg->clk_dev, (clock_control_subsys_t)&dev_cfg->sccon_cfg);
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if (rc != 0) {
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return rc;
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}
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rc = pinctrl_apply_state(dev_cfg->pcfg, PINCTRL_STATE_DEFAULT);
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if (rc != 0) {
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return rc;
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}
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return 0;
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}
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#define UART_RTS5912_DEVICE_INIT(n) \
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PINCTRL_DT_INST_DEFINE(n); \
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\
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static const struct uart_rts5912_device_config uart_rts5912_dev_cfg_##n = { \
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.pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(n), \
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.clk_dev = DEVICE_DT_GET(DT_INST_CLOCKS_CTLR(n)), \
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.sccon_cfg = \
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{ \
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.clk_grp = DT_INST_CLOCKS_CELL_BY_NAME(n, uart##n, clk_grp), \
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.clk_idx = DT_INST_CLOCKS_CELL_BY_NAME(n, uart##n, clk_idx), \
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}, \
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}; \
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\
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static struct uart_rts5912_dev_data uart_rts5912_dev_data_##n; \
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\
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DEVICE_DT_INST_DEFINE(n, &rts5912_uart_init, NULL, &uart_rts5912_dev_data_##n, \
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&uart_rts5912_dev_cfg_##n, PRE_KERNEL_1, \
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CONFIG_UART_RTS5912_INIT_PRIORITY, NULL);
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DT_INST_FOREACH_STATUS_OKAY(UART_RTS5912_DEVICE_INIT)
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