1 // SPDX-License-Identifier: GPL-2.0
3  * Microchip PolarFire SoC (MPFS) system controller driver
5  * Copyright (c) 2020-2021 Microchip Corporation. All rights reserved.
21 #include <soc/microchip/mpfs.h>
48 	reinit_completion(&sys_controller->c);  in mpfs_blocking_transaction()
50 	ret = mbox_send_message(sys_controller->chan, msg);  in mpfs_blocking_transaction()
52 		dev_warn(sys_controller->client.dev, "MPFS sys controller service timeout\n");  in mpfs_blocking_transaction()
57 	 * Unfortunately, the system controller will only deliver an interrupt  in mpfs_blocking_transaction()
67 	if (!wait_for_completion_timeout(&sys_controller->c, timeout)) {  in mpfs_blocking_transaction()
68 		ret = -EBADMSG;  in mpfs_blocking_transaction()
69 		dev_warn(sys_controller->client.dev,  in mpfs_blocking_transaction()
70 			 "MPFS sys controller service failed with status: %d\n",  in mpfs_blocking_transaction()
71 			 msg->response->resp_status);  in mpfs_blocking_transaction()
88 	complete(&sys_controller->c);  in mpfs_sys_controller_rx_callback()
96 	mbox_free_channel(sys_controller->chan);  in mpfs_sys_controller_delete()
104 	kref_put(&sys_controller->consumers, mpfs_sys_controller_delete);  in mpfs_sys_controller_put()
109 	return mpfs_client->flash;  in mpfs_sys_controller_get_flash()
115 		.name		= "mpfs-rng",
116 		.id		= -1,
119 		.name		= "mpfs-generic-service",
120 		.id		= -1,
123 		.name		= "mpfs-auto-update",
124 		.id		= -1,
130 	struct device *dev = &pdev->dev;  in mpfs_sys_controller_probe()
137 		return -ENOMEM;  in mpfs_sys_controller_probe()
139 	np = of_parse_phandle(dev->of_node, "microchip,bitstream-flash", 0);  in mpfs_sys_controller_probe()
143 	sys_controller->flash = of_get_mtd_device_by_node(np);  in mpfs_sys_controller_probe()
145 	if (IS_ERR(sys_controller->flash))  in mpfs_sys_controller_probe()
146 		return dev_err_probe(dev, PTR_ERR(sys_controller->flash), "Failed to get flash\n");  in mpfs_sys_controller_probe()
149 	sys_controller->client.dev = dev;  in mpfs_sys_controller_probe()
150 	sys_controller->client.rx_callback = mpfs_sys_controller_rx_callback;  in mpfs_sys_controller_probe()
151 	sys_controller->client.tx_block = 1U;  in mpfs_sys_controller_probe()
152 	sys_controller->client.tx_tout = msecs_to_jiffies(MPFS_SYS_CTRL_TIMEOUT_MS);  in mpfs_sys_controller_probe()
154 	sys_controller->chan = mbox_request_channel(&sys_controller->client, 0);  in mpfs_sys_controller_probe()
155 	if (IS_ERR(sys_controller->chan)) {  in mpfs_sys_controller_probe()
156 		ret = dev_err_probe(dev, PTR_ERR(sys_controller->chan),  in mpfs_sys_controller_probe()
162 	init_completion(&sys_controller->c);  in mpfs_sys_controller_probe()
163 	kref_init(&sys_controller->consumers);  in mpfs_sys_controller_probe()
174 	dev_info(&pdev->dev, "Registered MPFS system controller\n");  in mpfs_sys_controller_probe()
187 	{.compatible = "microchip,mpfs-sys-controller", },
198 	if (!dev->parent)  in mpfs_sys_controller_get()
201 	match = of_match_node(mpfs_sys_controller_of_match,  dev->parent->of_node);  in mpfs_sys_controller_get()
202 	of_node_put(dev->parent->of_node);  in mpfs_sys_controller_get()
206 	sys_controller = dev_get_drvdata(dev->parent);  in mpfs_sys_controller_get()
210 	if (!kref_get_unless_zero(&sys_controller->consumers))  in mpfs_sys_controller_get()
220 	dev_dbg(dev, "Parent device was not an MPFS system controller\n");  in mpfs_sys_controller_get()
221 	return ERR_PTR(-ENODEV);  in mpfs_sys_controller_get()
224 	dev_dbg(dev, "MPFS system controller found but could not register as a sub device\n");  in mpfs_sys_controller_get()
225 	return ERR_PTR(-EPROBE_DEFER);  in mpfs_sys_controller_get()
231 		.name = "mpfs-sys-controller",
241 MODULE_DESCRIPTION("MPFS system controller driver");