drivers: spi: gecko: add new driver for SPI communication via EUSART
Added a new driver to support SPI communication via EUSART. Since the Silabs EFR32MG24 family SoCs have only one USART, EUSART support is necessary for implementing SPI functionality. Signed-off-by: Teresa Zepeda Ventura <teresa.zvent@gmail.com>
This commit is contained in:
parent
33594595c9
commit
6773f33445
10 changed files with 419 additions and 5 deletions
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@ -24,6 +24,11 @@ int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt, uintp
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(void)base;
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#endif /*USART_COUNT > 1*/
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#ifdef CONFIG_SPI_GECKO_EUSART
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EUSART_TypeDef *ebase = (EUSART_TypeDef *)reg;
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int eusart_num = EUSART_NUM(ebase);
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#endif
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#endif
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#ifdef CONFIG_I2C_GECKO
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@ -171,7 +176,53 @@ int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt, uintp
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#endif /* CONFIG_SOC_FAMILY_SILABS_S1 */
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#endif /* CONFIG_UART_GECKO */
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#ifdef CONFIG_SPI_GECKO
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#ifdef CONFIG_SPI_GECKO_EUSART
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case GECKO_FUN_SPI_SCK:
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pin_config.mode = gpioModePushPull;
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pin_config.out = 1;
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GPIO->EUSARTROUTE[eusart_num].SCLKROUTE =
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(pin_config.port << _GPIO_EUSART_SCLKROUTE_PORT_SHIFT) |
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(pin_config.pin << _GPIO_EUSART_SCLKROUTE_PIN_SHIFT);
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GPIO->EUSARTROUTE[eusart_num].ROUTEEN |= GPIO_EUSART_ROUTEEN_SCLKPEN;
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GPIO_PinModeSet(pin_config.port, pin_config.pin, pin_config.mode,
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pin_config.out);
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break;
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case GECKO_FUN_SPI_CSN:
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pin_config.mode = gpioModePushPull;
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pin_config.out = 1;
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GPIO->EUSARTROUTE[eusart_num].CSROUTE =
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(pin_config.port << _GPIO_EUSART_CSROUTE_PORT_SHIFT) |
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(pin_config.pin << _GPIO_EUSART_CSROUTE_PIN_SHIFT);
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GPIO->EUSARTROUTE[eusart_num].ROUTEEN |= GPIO_EUSART_ROUTEEN_CSPEN;
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GPIO_PinModeSet(pin_config.port, pin_config.pin, pin_config.mode,
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pin_config.out);
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break;
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case GECKO_FUN_SPI_MOSI:
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pin_config.mode = gpioModePushPull;
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pin_config.out = 1;
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GPIO->EUSARTROUTE[eusart_num].TXROUTE =
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(pin_config.port << _GPIO_EUSART_TXROUTE_PORT_SHIFT) |
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(pin_config.pin << _GPIO_EUSART_TXROUTE_PIN_SHIFT);
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GPIO->EUSARTROUTE[eusart_num].ROUTEEN |= GPIO_EUSART_ROUTEEN_TXPEN;
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GPIO_PinModeSet(pin_config.port, pin_config.pin, pin_config.mode,
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pin_config.out);
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break;
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case GECKO_FUN_SPI_MISO:
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pin_config.mode = gpioModeInput;
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pin_config.out = 1;
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GPIO->EUSARTROUTE[eusart_num].RXROUTE =
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(pin_config.port << _GPIO_EUSART_RXROUTE_PORT_SHIFT) |
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(pin_config.pin << _GPIO_EUSART_RXROUTE_PIN_SHIFT);
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GPIO->EUSARTROUTE[EUSART_NUM(EUSART1)].ROUTEEN |= GPIO_EUSART_ROUTEEN_RXPEN;
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GPIO_PinModeSet(pin_config.port, pin_config.pin, pin_config.mode,
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pin_config.out);
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break;
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#endif /*CONFIG_SPI_GECKO_EUSART*/
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#ifdef CONFIG_SPI_GECKO_USART
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#ifdef CONFIG_SOC_FAMILY_SILABS_S1
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case GECKO_FUN_SPIM_SCK:
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pin_config.mode = gpioModePushPull;
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@ -287,7 +338,7 @@ int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt, uintp
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pin_config.out);
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break;
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#endif /* CONFIG_SOC_FAMILY_SILABS_S1 */
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#endif /* CONFIG_SPI_GECKO */
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#endif /* CONFIG_SPI_GECKO_USART */
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#ifdef CONFIG_I2C_GECKO
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case GECKO_FUN_I2C_SDA:
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@ -28,7 +28,8 @@ zephyr_library_sources_ifdef(CONFIG_SPI_LITEX spi_litex.c)
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zephyr_library_sources_ifdef(CONFIG_SPI_LITEX_LITESPI spi_litex_litespi.c)
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zephyr_library_sources_ifdef(CONFIG_SPI_OC_SIMPLE spi_oc_simple.c)
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zephyr_library_sources_ifdef(CONFIG_SPI_XEC_QMSPI spi_xec_qmspi.c)
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zephyr_library_sources_ifdef(CONFIG_SPI_GECKO spi_gecko.c)
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zephyr_library_sources_ifdef(CONFIG_SPI_GECKO_USART spi_gecko_usart.c)
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zephyr_library_sources_ifdef(CONFIG_SPI_GECKO_EUSART spi_gecko_eusart.c)
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zephyr_library_sources_ifdef(CONFIG_SPI_XLNX_AXI_QUADSPI spi_xlnx_axi_quadspi.c)
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zephyr_library_sources_ifdef(CONFIG_ESP32_SPIM spi_esp32_spim.c)
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zephyr_library_sources_ifdef(CONFIG_SPI_TEST spi_test.c)
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@ -111,7 +111,9 @@ source "drivers/spi/Kconfig.oc_simple"
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source "drivers/spi/Kconfig.xec_qmspi"
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source "drivers/spi/Kconfig.gecko"
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source "drivers/spi/Kconfig.gecko_usart"
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source "drivers/spi/Kconfig.gecko_eusart"
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source "drivers/spi/Kconfig.xlnx"
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13
drivers/spi/Kconfig.gecko_eusart
Normal file
13
drivers/spi/Kconfig.gecko_eusart
Normal file
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@ -0,0 +1,13 @@
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# Gecko SPI configuration option
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# Copyright (c) 2024 Daikin Comfort Technologies North America, Inc.
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# SPDX-License-Identifier: Apache-2.0
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config SPI_GECKO_EUSART
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bool "Gecko EUSART SPI controller driver"
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default y
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depends on DT_HAS_SILABS_GECKO_SPI_EUSART_ENABLED
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depends on GPIO
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select SOC_GECKO_EUSART
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help
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Enable the EUSART SPI peripherals on Gecko
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@ -3,7 +3,7 @@
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# Copyright (c) 2019 Christian Taedcke <hacking@taedcke.com>
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# SPDX-License-Identifier: Apache-2.0
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config SPI_GECKO
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config SPI_GECKO_USART
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bool "Gecko SPI controller driver"
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default y
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depends on DT_HAS_SILABS_GECKO_SPI_USART_ENABLED
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319
drivers/spi/spi_gecko_eusart.c
Normal file
319
drivers/spi/spi_gecko_eusart.c
Normal file
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@ -0,0 +1,319 @@
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/*
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* Copyright (c) 2024 Daikin Comfort Technologies North America, Inc.
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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 silabs_gecko_spi_eusart
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#include <stdbool.h>
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#include <zephyr/sys/sys_io.h>
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#include <zephyr/device.h>
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#include <zephyr/drivers/spi.h>
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#include <zephyr/drivers/clock_control.h>
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#include <zephyr/drivers/clock_control/clock_control_silabs.h>
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#include <zephyr/drivers/pinctrl.h>
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#include <zephyr/logging/log.h>
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#include <em_cmu.h>
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#include <em_eusart.h>
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LOG_MODULE_REGISTER(spi_gecko_eusart, CONFIG_SPI_LOG_LEVEL);
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#include "spi_context.h"
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#define SPI_WORD_SIZE 8
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/* Structure Declarations */
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struct spi_gecko_eusart_data {
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struct spi_context ctx;
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};
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struct spi_gecko_eusart_config {
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EUSART_TypeDef *base;
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const struct device *clock_dev;
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const struct silabs_clock_control_cmu_config clock_cfg;
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uint32_t clock_frequency;
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const struct pinctrl_dev_config *pcfg;
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};
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/* Helper Functions */
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static int spi_eusart_config(const struct device *dev, const struct spi_config *config,
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uint16_t *control)
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{
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struct spi_gecko_eusart_data *data = dev->data;
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const struct spi_gecko_eusart_config *gecko_config = dev->config;
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uint32_t spi_frequency;
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EUSART_SpiAdvancedInit_TypeDef eusartAdvancedSpiInit = EUSART_SPI_ADVANCED_INIT_DEFAULT;
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EUSART_SpiInit_TypeDef eusartInit = EUSART_SPI_MASTER_INIT_DEFAULT_HF;
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int err;
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err = clock_control_get_rate(gecko_config->clock_dev,
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(clock_control_subsys_t)&gecko_config->clock_cfg,
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&spi_frequency);
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if (err) {
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return err;
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}
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/* Max supported SPI frequency is half the source clock */
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spi_frequency /= 2;
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if (spi_context_configured(&data->ctx, config)) {
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/* Already configured. No need to do it again. */
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return 0;
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}
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if (config->operation & SPI_HALF_DUPLEX) {
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LOG_ERR("Half-duplex not supported");
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return -ENOTSUP;
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}
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if (SPI_WORD_SIZE_GET(config->operation) != SPI_WORD_SIZE) {
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LOG_ERR("Word size must be %d", SPI_WORD_SIZE);
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return -ENOTSUP;
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}
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if (IS_ENABLED(CONFIG_SPI_EXTENDED_MODES) &&
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(config->operation & SPI_LINES_MASK) != SPI_LINES_SINGLE) {
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LOG_ERR("Only supports single mode");
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return -ENOTSUP;
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}
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if (config->operation & SPI_TRANSFER_LSB) {
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LOG_ERR("LSB first not supported");
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return -ENOTSUP;
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}
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if (config->operation & SPI_OP_MODE_SLAVE) {
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LOG_ERR("Slave mode not supported");
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return -ENOTSUP;
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}
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/* Set frequency to the minimum of what the device supports, what the
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* user has configured the controller to, and the max frequency for the
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* transaction.
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*/
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if (gecko_config->clock_frequency > spi_frequency) {
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LOG_ERR("SPI clock-frequency too high");
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return -EINVAL;
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}
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spi_frequency = MIN(gecko_config->clock_frequency, spi_frequency);
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if (config->frequency) {
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spi_frequency = MIN(config->frequency, spi_frequency);
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}
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eusartInit.bitRate = spi_frequency;
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if (config->operation & SPI_MODE_LOOP) {
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eusartInit.loopbackEnable = eusartLoopbackEnable;
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} else {
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eusartInit.loopbackEnable = eusartLoopbackDisable;
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}
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/* Set Clock Mode */
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if (config->operation & SPI_MODE_CPOL) {
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if (config->operation & SPI_MODE_CPHA) {
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eusartInit.clockMode = eusartClockMode3;
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} else {
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eusartInit.clockMode = eusartClockMode2;
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}
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} else {
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if (config->operation & SPI_MODE_CPHA) {
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eusartInit.clockMode = eusartClockMode1;
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} else {
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eusartInit.clockMode = eusartClockMode0;
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}
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}
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if (config->operation & SPI_CS_ACTIVE_HIGH) {
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eusartAdvancedSpiInit.csPolarity = eusartCsActiveHigh;
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} else {
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eusartAdvancedSpiInit.csPolarity = eusartCsActiveLow;
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}
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eusartInit.databits = eusartDataBits8;
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eusartInit.advancedSettings = &eusartAdvancedSpiInit;
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/* Enable EUSART clock */
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err = clock_control_on(gecko_config->clock_dev,
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(clock_control_subsys_t)&gecko_config->clock_cfg);
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if (err < 0) {
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return err;
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}
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/* Initialize the EUSART */
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EUSART_SpiInit(gecko_config->base, &eusartInit);
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data->ctx.config = config;
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/* Enable the peripheral */
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gecko_config->base->CMD = (uint32_t)eusartEnable;
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return 0;
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}
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static void spi_gecko_eusart_send(EUSART_TypeDef *eusart, uint8_t frame)
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{
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/* Write frame to register */
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EUSART_Tx(eusart, frame);
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/* Wait until the transfer ends */
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while (!(eusart->STATUS & EUSART_STATUS_TXC)) {
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}
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}
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static uint8_t spi_gecko_eusart_recv(EUSART_TypeDef *eusart)
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{
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/* Return data inside rx register */
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return EUSART_Rx(eusart);
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}
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static bool spi_eusart_transfer_ongoing(struct spi_gecko_eusart_data *data)
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{
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return spi_context_tx_on(&data->ctx) || spi_context_rx_on(&data->ctx);
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}
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static inline uint8_t spi_eusart_next_tx(struct spi_gecko_eusart_data *data)
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{
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uint8_t tx_frame = 0;
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if (spi_context_tx_buf_on(&data->ctx)) {
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tx_frame = UNALIGNED_GET((uint8_t *)(data->ctx.tx_buf));
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}
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return tx_frame;
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}
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static int spi_eusart_shift_frames(EUSART_TypeDef *eusart, struct spi_gecko_eusart_data *data)
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{
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uint8_t tx_frame;
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uint8_t rx_frame;
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tx_frame = spi_eusart_next_tx(data);
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spi_gecko_eusart_send(eusart, tx_frame);
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spi_context_update_tx(&data->ctx, 1, 1);
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rx_frame = spi_gecko_eusart_recv(eusart);
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if (spi_context_rx_buf_on(&data->ctx)) {
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UNALIGNED_PUT(rx_frame, (uint8_t *)data->ctx.rx_buf);
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}
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spi_context_update_rx(&data->ctx, 1, 1);
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return 0;
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}
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static void spi_gecko_eusart_xfer(const struct device *dev, const struct spi_config *config)
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{
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int ret;
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struct spi_gecko_eusart_data *data = dev->data;
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struct spi_context *ctx = &data->ctx;
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const struct spi_gecko_eusart_config *gecko_config = dev->config;
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spi_context_cs_control(ctx, true);
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do {
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ret = spi_eusart_shift_frames(gecko_config->base, data);
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} while (!ret && spi_eusart_transfer_ongoing(data));
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spi_context_cs_control(ctx, false);
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spi_context_complete(ctx, dev, 0);
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}
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/* API Functions */
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static int spi_gecko_eusart_init(const struct device *dev)
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{
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int err;
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const struct spi_gecko_eusart_config *config = dev->config;
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struct spi_gecko_eusart_data *data = dev->data;
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err = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_DEFAULT);
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if (err < 0) {
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return err;
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}
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err = spi_context_cs_configure_all(&data->ctx);
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if (err < 0) {
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return err;
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}
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spi_context_unlock_unconditionally(&data->ctx);
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return 0;
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}
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static int spi_gecko_eusart_transceive(const struct device *dev, const struct spi_config *config,
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const struct spi_buf_set *tx_bufs,
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const struct spi_buf_set *rx_bufs)
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{
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struct spi_gecko_eusart_data *data = dev->data;
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uint16_t control = 0;
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int ret;
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spi_context_lock(&data->ctx, false, NULL, NULL, config);
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ret = spi_eusart_config(dev, config, &control);
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if (ret < 0) {
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spi_context_release(&data->ctx, ret);
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return ret;
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}
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spi_context_buffers_setup(&data->ctx, tx_bufs, rx_bufs, 1);
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spi_gecko_eusart_xfer(dev, config);
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spi_context_release(&data->ctx, ret);
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return 0;
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}
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#ifdef CONFIG_SPI_ASYNC
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static int spi_gecko_eusart_transceive_async(const struct device *dev,
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const struct spi_config *config,
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const struct spi_buf_set *tx_bufs,
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const struct spi_buf_set *rx_bufs,
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struct k_poll_signal *async)
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{
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return -ENOTSUP;
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}
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#endif /* CONFIG_SPI_ASYNC */
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static int spi_gecko_eusart_release(const struct device *dev, const struct spi_config *config)
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{
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const struct spi_gecko_eusart_config *gecko_config = dev->config;
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struct spi_gecko_eusart_data *data = dev->data;
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spi_context_unlock_unconditionally(&data->ctx);
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if (!(gecko_config->base->STATUS & EUSART_STATUS_TXIDLE)) {
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return -EBUSY;
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}
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return 0;
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}
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/* Device Instantiation */
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static const struct spi_driver_api spi_gecko_eusart_api = {
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.transceive = spi_gecko_eusart_transceive,
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#ifdef CONFIG_SPI_ASYNC
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.transceive_async = spi_gecko_eusart_transceive_async,
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#endif /* CONFIG_SPI_ASYNC */
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.release = spi_gecko_eusart_release,
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};
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||||
|
||||
#define SPI_INIT(n) \
|
||||
PINCTRL_DT_INST_DEFINE(n); \
|
||||
static struct spi_gecko_eusart_data spi_gecko_eusart_data_##n = { \
|
||||
SPI_CONTEXT_INIT_LOCK(spi_gecko_eusart_data_##n, ctx), \
|
||||
SPI_CONTEXT_INIT_SYNC(spi_gecko_eusart_data_##n, ctx), \
|
||||
SPI_CONTEXT_CS_GPIOS_INITIALIZE(DT_DRV_INST(n), ctx)}; \
|
||||
static struct spi_gecko_eusart_config spi_gecko_eusart_cfg_##n = { \
|
||||
.pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(n), \
|
||||
.base = (EUSART_TypeDef *)DT_INST_REG_ADDR(n), \
|
||||
.clock_dev = DEVICE_DT_GET(DT_INST_CLOCKS_CTLR(n)), \
|
||||
.clock_cfg = SILABS_DT_INST_CLOCK_CFG(n), \
|
||||
.clock_frequency = DT_INST_PROP_OR(n, clock_frequency, 1000000) \
|
||||
}; \
|
||||
DEVICE_DT_INST_DEFINE(n, spi_gecko_eusart_init, NULL, &spi_gecko_eusart_data_##n, \
|
||||
&spi_gecko_eusart_cfg_##n, POST_KERNEL, CONFIG_SPI_INIT_PRIORITY, \
|
||||
&spi_gecko_eusart_api);
|
||||
|
||||
DT_INST_FOREACH_STATUS_OKAY(SPI_INIT)
|
|
@ -127,6 +127,7 @@
|
|||
clocks = <&cmu CLOCK_EUSART0 CLOCK_BRANCH_EUSART0CLK>;
|
||||
status = "disabled";
|
||||
};
|
||||
|
||||
eusart1: eusart@500a0000 {
|
||||
compatible = "silabs,gecko-spi-eusart";
|
||||
reg = <0x500A0000 0x4000>;
|
||||
|
|
21
dts/bindings/spi/silabs,gecko-spi-eusart.yaml
Normal file
21
dts/bindings/spi/silabs,gecko-spi-eusart.yaml
Normal file
|
@ -0,0 +1,21 @@
|
|||
description: GECKO EUSART SPI
|
||||
|
||||
compatible: "silabs,gecko-spi-eusart"
|
||||
|
||||
include: [spi-controller.yaml, pinctrl-device.yaml]
|
||||
|
||||
properties:
|
||||
reg:
|
||||
required: true
|
||||
|
||||
interrupts:
|
||||
required: true
|
||||
|
||||
pinctrl-0:
|
||||
required: true
|
||||
|
||||
pinctrl-names:
|
||||
required: true
|
||||
|
||||
clocks:
|
||||
required: true
|
|
@ -105,6 +105,12 @@ config SOC_GECKO_USART
|
|||
Set if the Universal Synchronous Asynchronous Receiver/Transmitter (USART)
|
||||
HAL module is used.
|
||||
|
||||
config SOC_GECKO_EUSART
|
||||
bool
|
||||
help
|
||||
Set if the Extended Universal Synchronous Asynchronous Receiver/Transmitter (EUSART)
|
||||
HAL module is used.
|
||||
|
||||
config SOC_GECKO_WDOG
|
||||
bool
|
||||
help
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue