1 // SPDX-License-Identifier: GPL-2.0+
2 /* SC16IS7xx SPI interface driver */
8 #include <linux/spi/spi.h>
14 /* SPI definitions */
17 static int sc16is7xx_spi_probe(struct spi_device *spi)  in sc16is7xx_spi_probe()  argument
25 	/* Setup SPI bus */  in sc16is7xx_spi_probe()
26 	spi->bits_per_word	= 8;  in sc16is7xx_spi_probe()
27 	/* For all variants, only mode 0 is supported */  in sc16is7xx_spi_probe()
28 	if ((spi->mode & SPI_MODE_X_MASK) != SPI_MODE_0)  in sc16is7xx_spi_probe()
29 		return dev_err_probe(&spi->dev, -EINVAL, "Unsupported SPI mode\n");  in sc16is7xx_spi_probe()
31 	spi->mode		= spi->mode ? : SPI_MODE_0;  in sc16is7xx_spi_probe()
32 	spi->max_speed_hz	= spi->max_speed_hz ? : 4 * HZ_PER_MHZ;  in sc16is7xx_spi_probe()
33 	ret = spi_setup(spi);  in sc16is7xx_spi_probe()
37 	devtype = spi_get_device_match_data(spi);  in sc16is7xx_spi_probe()
39 		return dev_err_probe(&spi->dev, -ENODEV, "Failed to match device\n");  in sc16is7xx_spi_probe()
43 	for (i = 0; i < devtype->nr_uart; i++) {  in sc16is7xx_spi_probe()
53 		regmaps[i] = devm_regmap_init_spi(spi, &regcfg);  in sc16is7xx_spi_probe()
56 	return sc16is7xx_probe(&spi->dev, devtype, regmaps, spi->irq);  in sc16is7xx_spi_probe()
59 static void sc16is7xx_spi_remove(struct spi_device *spi)  in sc16is7xx_spi_remove()  argument
61 	sc16is7xx_remove(&spi->dev);  in sc16is7xx_spi_remove()
74 MODULE_DEVICE_TABLE(spi, sc16is7xx_spi_id_table);
89 MODULE_DESCRIPTION("SC16IS7xx SPI interface driver");