Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Driver for AT91 USART
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2018 Microchip Technology
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Author: Radu Pirea <radu.pirea@microchip.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <dt-bindings/mfd/at91-usart.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/mfd/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/property.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static const struct mfd_cell at91_usart_spi_subdev = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	.name = "at91_usart_spi",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	.of_compatible = "microchip,at91sam9g45-usart-spi",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static const struct mfd_cell at91_usart_serial_subdev = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	.name = "atmel_usart_serial",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	.of_compatible = "atmel,at91rm9200-usart-serial",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static int at91_usart_mode_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	const struct mfd_cell *cell;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	u32 opmode = AT91_USART_MODE_SERIAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	device_property_read_u32(&pdev->dev, "atmel,usart-mode", &opmode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	switch (opmode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	case AT91_USART_MODE_SPI:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		cell = &at91_usart_spi_subdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	case AT91_USART_MODE_SERIAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 		cell = &at91_usart_serial_subdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 		dev_err(&pdev->dev, "atmel,usart-mode has an invalid value %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 			opmode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	return devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_AUTO, cell, 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 			      NULL, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static const struct of_device_id at91_usart_mode_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	{ .compatible = "atmel,at91rm9200-usart" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	{ .compatible = "atmel,at91sam9260-usart" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	{ /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) MODULE_DEVICE_TABLE(of, at91_usart_mode_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static struct platform_driver at91_usart_mfd = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	.probe	= at91_usart_mode_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	.driver	= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 		.name		= "at91_usart_mode",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 		.of_match_table	= at91_usart_mode_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) module_platform_driver(at91_usart_mfd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) MODULE_AUTHOR("Radu Pirea <radu.pirea@microchip.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) MODULE_DESCRIPTION("AT91 USART MFD driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) MODULE_LICENSE("GPL v2");