soc/aspeed/aspeed-uart-routing.c

1 // SPDX-License-Identifier: GPL-2.0+
65 /* routing selector for AST25xx */
287 /* routing selector for AST26xx */
499 	regmap_read(uart_routing->map, sel->reg, &val);  in aspeed_uart_routing_show()
500 	val = (val >> sel->shift) & sel->mask;  in aspeed_uart_routing_show()
503 	for (pos = 0; sel->options[pos] != NULL; ++pos) {  in aspeed_uart_routing_show()
505 			len += sysfs_emit_at(buf, len, "[%s] ", sel->options[pos]);  in aspeed_uart_routing_show()
507 			len += sysfs_emit_at(buf, len, "%s ", sel->options[pos]);  in aspeed_uart_routing_show()
526 	val = __sysfs_match_string(sel->options, -1, buf);  in aspeed_uart_routing_store()
529 		return -EINVAL;  in aspeed_uart_routing_store()
532 	regmap_update_bits(uart_routing->map, sel->reg,  in aspeed_uart_routing_store()
533 			(sel->mask << sel->shift),  in aspeed_uart_routing_store()
534 			(val & sel->mask) << sel->shift);  in aspeed_uart_routing_store()
542 	struct device *dev = &pdev->dev;  in aspeed_uart_routing_probe()
545 	uart_routing = devm_kzalloc(&pdev->dev, sizeof(*uart_routing), GFP_KERNEL);  in aspeed_uart_routing_probe()
547 		return -ENOMEM;  in aspeed_uart_routing_probe()
549 	uart_routing->map = syscon_node_to_regmap(dev->parent->of_node);  in aspeed_uart_routing_probe()
550 	if (IS_ERR(uart_routing->map)) {  in aspeed_uart_routing_probe()
552 		return PTR_ERR(uart_routing->map);  in aspeed_uart_routing_probe()
555 	uart_routing->attr_grp = of_device_get_match_data(dev);  in aspeed_uart_routing_probe()
557 	rc = sysfs_create_group(&dev->kobj, uart_routing->attr_grp);  in aspeed_uart_routing_probe()
570 	struct device *dev = &pdev->dev;  in aspeed_uart_routing_remove()
573 	sysfs_remove_group(&dev->kobj, uart_routing->attr_grp);  in aspeed_uart_routing_remove()
577 	{ .compatible = "aspeed,ast2400-uart-routing",
579 	{ .compatible = "aspeed,ast2500-uart-routing",
581 	{ .compatible = "aspeed,ast2600-uart-routing",
588 		.name = "aspeed-uart-routing",
598 MODULE_AUTHOR("Chia-Wei Wang <chiawei_wang@aspeedtech.com>");
600 MODULE_DESCRIPTION("Driver to configure Aspeed UART routing");