drivers: serial: added UART interrupts for Raspberry Pi Pico board
added UART interrupts driver for Raspberry Pi Pico board moved baudrate from config to data structure Signed-off-by: Andrei-Edward Popa <andrei_edward.popa@upb.ro>
This commit is contained in:
Andrei-Edward Popa
Anas Nashif
parent
2fc2928fa5
commit
5e8b0723e2
2 changed files with 242 additions and 15 deletions
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@ -9,3 +9,4 @@ config UART_RPI_PICO
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default $(dt_compat_enabled,$(DT_COMPAT_RPI_PICO_UART))
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select SERIAL_HAS_DRIVER
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select PICOSDK_USE_UART
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select SERIAL_SUPPORT_INTERRUPT
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@ -1,5 +1,6 @@
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/*
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* Copyright (c) 2021, Yonatan Schachter
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* Copyright (c) 2022, Andrei-Edward Popa
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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@ -14,8 +15,19 @@
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struct uart_rpi_config {
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uart_inst_t *const uart_dev;
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uint32_t baudrate;
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uart_hw_t *const uart_regs;
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const struct pinctrl_dev_config *pcfg;
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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uart_irq_config_func_t irq_config_func;
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#endif /* CONFIG_UART_INTERRUPT_DRIVEN */
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};
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struct uart_rpi_data {
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uint32_t baudrate;
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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uart_irq_callback_user_data_t irq_cb;
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void *irq_cb_data;
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#endif /* CONFIG_UART_INTERRUPT_DRIVEN */
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};
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static int uart_rpi_poll_in(const struct device *dev, unsigned char *c)
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@ -56,27 +68,241 @@ static int uart_rpi_init(const struct device *dev)
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return -EINVAL;
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}
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hw_clear_bits(&uart_hw->lcr_h, UART_UARTLCR_H_FEN_BITS);
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uart_hw->dr = 0U;
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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config->irq_config_func(dev);
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#endif /* CONFIG_UART_INTERRUPT_DRIVEN */
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return 0;
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}
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static int uart_rpi_err_check(const struct device *dev)
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{
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const struct uart_rpi_config * const config = dev->config;
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uart_hw_t * const uart_hw = config->uart_regs;
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uint32_t data_reg = uart_hw->dr;
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int errors = 0;
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if (data_reg & UART_UARTDR_OE_BITS) {
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errors |= UART_ERROR_OVERRUN;
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}
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if (data_reg & UART_UARTDR_BE_BITS) {
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errors |= UART_BREAK;
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}
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if (data_reg & UART_UARTDR_PE_BITS) {
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errors |= UART_ERROR_PARITY;
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}
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if (data_reg & UART_UARTDR_FE_BITS) {
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errors |= UART_ERROR_FRAMING;
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}
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return errors;
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}
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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static int uart_rpi_fifo_fill(const struct device *dev,
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const uint8_t *tx_data, int len)
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{
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const struct uart_rpi_config * const config = dev->config;
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uart_hw_t * const uart_hw = config->uart_regs;
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int tx_len = 0;
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while (!(uart_hw->fr & UART_UARTFR_TXFF_BITS) && (len - tx_len) > 0) {
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uart_hw->dr = tx_data[tx_len++];
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}
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return tx_len;
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}
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static int uart_rpi_fifo_read(const struct device *dev,
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uint8_t *rx_data, const int len)
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{
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const struct uart_rpi_config * const config = dev->config;
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uart_hw_t * const uart_hw = config->uart_regs;
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int rx_len = 0;
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while (!(uart_hw->fr & UART_UARTFR_RXFE_BITS) && (len - rx_len) > 0) {
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rx_data[rx_len++] = (uint8_t)uart_hw->dr;
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}
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return rx_len;
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}
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static void uart_rpi_irq_tx_enable(const struct device *dev)
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{
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const struct uart_rpi_config * const config = dev->config;
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uart_hw_t * const uart_hw = config->uart_regs;
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uart_hw->imsc |= UART_UARTIMSC_TXIM_BITS;
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uart_hw->ifls &= ~UART_UARTIFLS_TXIFLSEL_BITS;
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}
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static void uart_rpi_irq_tx_disable(const struct device *dev)
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{
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const struct uart_rpi_config * const config = dev->config;
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uart_hw_t * const uart_hw = config->uart_regs;
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uart_hw->imsc &= ~UART_UARTIMSC_TXIM_BITS;
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}
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static int uart_rpi_irq_tx_ready(const struct device *dev)
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{
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const struct uart_rpi_config * const config = dev->config;
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uart_hw_t * const uart_hw = config->uart_regs;
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return (uart_hw->mis & UART_UARTMIS_TXMIS_BITS) == UART_UARTMIS_TXMIS_BITS;
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}
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static void uart_rpi_irq_rx_enable(const struct device *dev)
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{
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const struct uart_rpi_config * const config = dev->config;
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uart_hw_t * const uart_hw = config->uart_regs;
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uart_hw->imsc |= UART_UARTIMSC_RXIM_BITS;
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uart_hw->ifls &= ~UART_UARTIFLS_RXIFLSEL_BITS;
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}
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static void uart_rpi_irq_rx_disable(const struct device *dev)
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{
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const struct uart_rpi_config * const config = dev->config;
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uart_hw_t * const uart_hw = config->uart_regs;
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uart_hw->imsc &= ~UART_UARTIMSC_RXIM_BITS;
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}
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static int uart_rpi_irq_tx_complete(const struct device *dev)
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{
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const struct uart_rpi_config * const config = dev->config;
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uart_hw_t * const uart_hw = config->uart_regs;
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return !!(uart_hw->fr & UART_UARTFR_TXFE_BITS);
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}
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static int uart_rpi_irq_rx_ready(const struct device *dev)
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{
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const struct uart_rpi_config * const config = dev->config;
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uart_hw_t * const uart_hw = config->uart_regs;
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return (uart_hw->mis & UART_UARTMIS_RXMIS_BITS) == UART_UARTMIS_RXMIS_BITS;
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}
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static void uart_rpi_irq_err_enable(const struct device *dev)
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{
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const struct uart_rpi_config * const config = dev->config;
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uart_hw_t * const uart_hw = config->uart_regs;
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uart_hw->imsc |= (UART_UARTIMSC_OEIM_BITS |
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UART_UARTIMSC_BEIM_BITS |
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UART_UARTIMSC_PEIM_BITS |
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UART_UARTIMSC_FEIM_BITS |
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UART_UARTIMSC_RTIM_BITS);
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}
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static void uart_rpi_irq_err_disable(const struct device *dev)
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{
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const struct uart_rpi_config * const config = dev->config;
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uart_hw_t * const uart_hw = config->uart_regs;
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uart_hw->imsc &= ~(UART_UARTIMSC_OEIM_BITS |
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UART_UARTIMSC_BEIM_BITS |
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UART_UARTIMSC_PEIM_BITS |
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UART_UARTIMSC_FEIM_BITS |
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UART_UARTIMSC_RTIM_BITS);
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}
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static int uart_rpi_irq_is_pending(const struct device *dev)
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{
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return !!(uart_rpi_irq_rx_ready(dev) || uart_rpi_irq_tx_ready(dev));
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}
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static int uart_rpi_irq_update(const struct device *dev)
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{
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return 1;
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}
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static void uart_rpi_irq_callback_set(const struct device *dev,
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uart_irq_callback_user_data_t cb,
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void *cb_data)
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{
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struct uart_rpi_data * const data = dev->data;
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data->irq_cb = cb;
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data->irq_cb_data = cb_data;
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}
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static void uart_rpi_isr(const struct device *dev)
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{
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struct uart_rpi_data * const data = dev->data;
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if (data->irq_cb) {
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data->irq_cb(dev, data->irq_cb_data);
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}
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}
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#endif /* CONFIG_UART_INTERRUPT_DRIVEN */
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static const struct uart_driver_api uart_rpi_driver_api = {
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.poll_in = uart_rpi_poll_in,
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.poll_out = uart_rpi_poll_out,
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.err_check = uart_rpi_err_check,
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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.fifo_fill = uart_rpi_fifo_fill,
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.fifo_read = uart_rpi_fifo_read,
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.irq_tx_enable = uart_rpi_irq_tx_enable,
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.irq_tx_disable = uart_rpi_irq_tx_disable,
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.irq_tx_ready = uart_rpi_irq_tx_ready,
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.irq_rx_enable = uart_rpi_irq_rx_enable,
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.irq_rx_disable = uart_rpi_irq_rx_disable,
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.irq_tx_complete = uart_rpi_irq_tx_complete,
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.irq_rx_ready = uart_rpi_irq_rx_ready,
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.irq_err_enable = uart_rpi_irq_err_enable,
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.irq_err_disable = uart_rpi_irq_err_disable,
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.irq_is_pending = uart_rpi_irq_is_pending,
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.irq_update = uart_rpi_irq_update,
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.irq_callback_set = uart_rpi_irq_callback_set,
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#endif /* CONFIG_UART_INTERRUPT_DRIVEN */
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};
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#define RPI_UART_INIT(idx) \
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PINCTRL_DT_INST_DEFINE(idx); \
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static const struct uart_rpi_config uart_rpi_cfg_##idx = { \
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.uart_dev = (uart_inst_t *)DT_INST_REG_ADDR(idx), \
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.baudrate = DT_INST_PROP(idx, current_speed), \
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.pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(idx), \
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}; \
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\
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DEVICE_DT_INST_DEFINE(idx, &uart_rpi_init, \
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NULL, \
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NULL, \
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&uart_rpi_cfg_##idx, PRE_KERNEL_1, \
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CONFIG_SERIAL_INIT_PRIORITY, \
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&uart_rpi_driver_api);
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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#define RPI_UART_IRQ_CONFIG_INIT(idx) \
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.irq_config_func = uart##idx##_rpi_irq_config_func
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#else
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#define RPI_UART_IRQ_CONFIG_INIT(idx)
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#endif /* CONFIG_UART_INTERRUPT_DRIVEN*/
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#define RPI_UART_INIT(idx) \
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PINCTRL_DT_INST_DEFINE(idx); \
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\
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static void uart##idx##_rpi_irq_config_func(const struct device *port) \
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{ \
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IRQ_CONNECT(DT_INST_IRQN(idx), \
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DT_INST_IRQ(idx, priority), \
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uart_rpi_isr, \
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DEVICE_DT_INST_GET(idx), 0); \
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irq_enable(DT_INST_IRQN(idx)); \
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} \
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\
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static const struct uart_rpi_config uart##idx##_rpi_config = { \
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.uart_dev = uart##idx, \
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.uart_regs = (uart_hw_t *)uart##idx, \
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.pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(idx), \
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RPI_UART_IRQ_CONFIG_INIT(idx), \
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}; \
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\
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static struct uart_rpi_data uart##idx##_rpi_data = { \
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.baudrate = DT_INST_PROP(idx, current_speed), \
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}; \
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\
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DEVICE_DT_INST_DEFINE(idx, &uart_rpi_init, \
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NULL, &uart##idx##_rpi_data, \
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&uart##idx##_rpi_config, PRE_KERNEL_1, \
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CONFIG_SERIAL_INIT_PRIORITY, \
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&uart_rpi_driver_api); \
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DT_INST_FOREACH_STATUS_OKAY(RPI_UART_INIT)
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