2  * SPI OF support routines
5  * Support routines for deriving SPI device attachments from the device
12 #include <linux/spi/spi.h>
17  * of_register_spi_devices - Register child devices onto the SPI bus
25 	struct spi_device *spi;  in of_register_spi_devices()  local
36 		spi = spi_alloc_device(master);  in of_register_spi_devices()
37 		if (!spi) {  in of_register_spi_devices()
40 			spi_dev_put(spi);  in of_register_spi_devices()
45 		if (of_modalias_node(nc, spi->modalias,  in of_register_spi_devices()
46 				     sizeof(spi->modalias)) < 0) {  in of_register_spi_devices()
49 			spi_dev_put(spi);  in of_register_spi_devices()
58 			spi_dev_put(spi);  in of_register_spi_devices()
61 		spi->chip_select = be32_to_cpup(prop);  in of_register_spi_devices()
64 		if (of_find_property(nc, "spi-cpha", NULL))  in of_register_spi_devices()
65 			spi->mode |= SPI_CPHA;  in of_register_spi_devices()
66 		if (of_find_property(nc, "spi-cpol", NULL))  in of_register_spi_devices()
67 			spi->mode |= SPI_CPOL;  in of_register_spi_devices()
68 		if (of_find_property(nc, "spi-cs-high", NULL))  in of_register_spi_devices()
69 			spi->mode |= SPI_CS_HIGH;  in of_register_spi_devices()
72 		prop = of_get_property(nc, "spi-max-frequency", &len);  in of_register_spi_devices()
74 			dev_err(&master->dev, "%s has no 'spi-max-frequency' property\n",  in of_register_spi_devices()
76 			spi_dev_put(spi);  in of_register_spi_devices()
79 		spi->max_speed_hz = be32_to_cpup(prop);  in of_register_spi_devices()
82 		spi->irq = irq_of_parse_and_map(nc, 0);  in of_register_spi_devices()
86 		spi->dev.of_node = nc;  in of_register_spi_devices()
89 		request_module(spi->modalias);  in of_register_spi_devices()
90 		rc = spi_add_device(spi);  in of_register_spi_devices()
94 			spi_dev_put(spi);  in of_register_spi_devices()