drivers/of/of_spi.c

17  * of_register_spi_devices - Register child devices onto the SPI bus
20  * Registers an spi_device for each child node of master node which has a 'reg'
21  * property.
31 	if (!master->dev.of_node)  in of_register_spi_devices()
34 	for_each_child_of_node(master->dev.of_node, nc) {  in of_register_spi_devices()
38 			dev_err(&master->dev, "spi_device alloc error for %s\n",  in of_register_spi_devices()
39 				nc->full_name);  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()
47 			dev_err(&master->dev, "cannot find modalias for %s\n",  in of_register_spi_devices()
48 				nc->full_name);  in of_register_spi_devices()
56 			dev_err(&master->dev, "%s has no 'reg' property\n",  in of_register_spi_devices()
57 				nc->full_name);  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()
75 				nc->full_name);  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()
84 		/* Store a pointer to the node in the device structure */  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()
92 			dev_err(&master->dev, "spi_device register error %s\n",  in of_register_spi_devices()
93 				nc->full_name);  in of_register_spi_devices()