1 // SPDX-License-Identifier: GPL-2.0
3  * phy-can-transceiver.c - phy driver for CAN transceivers
5  * Copyright (C) 2021 Texas Instruments Incorporated - https://www.ti.com
14 #include <linux/mux/consumer.h>
35 	if (can_transceiver_phy->mux_state) {  in can_transceiver_phy_power_on()
36 		ret = mux_state_select(can_transceiver_phy->mux_state);  in can_transceiver_phy_power_on()
38 			dev_err(&phy->dev, "Failed to select CAN mux: %d\n", ret);  in can_transceiver_phy_power_on()
42 	if (can_transceiver_phy->standby_gpio)  in can_transceiver_phy_power_on()
43 		gpiod_set_value_cansleep(can_transceiver_phy->standby_gpio, 0);  in can_transceiver_phy_power_on()
44 	if (can_transceiver_phy->enable_gpio)  in can_transceiver_phy_power_on()
45 		gpiod_set_value_cansleep(can_transceiver_phy->enable_gpio, 1);  in can_transceiver_phy_power_on()
55 	if (can_transceiver_phy->standby_gpio)  in can_transceiver_phy_power_off()
56 		gpiod_set_value_cansleep(can_transceiver_phy->standby_gpio, 1);  in can_transceiver_phy_power_off()
57 	if (can_transceiver_phy->enable_gpio)  in can_transceiver_phy_power_off()
58 		gpiod_set_value_cansleep(can_transceiver_phy->enable_gpio, 0);  in can_transceiver_phy_power_off()
59 	if (can_transceiver_phy->mux_state)  in can_transceiver_phy_power_off()
60 		mux_state_deselect(can_transceiver_phy->mux_state);  in can_transceiver_phy_power_off()
99 	struct device *dev = &pdev->dev;  in can_transceiver_phy_probe()
111 		return -ENOMEM;  in can_transceiver_phy_probe()
113 	match = of_match_node(can_transceiver_phy_ids, pdev->dev.of_node);  in can_transceiver_phy_probe()
114 	drvdata = match->data;  in can_transceiver_phy_probe()
116 	if (of_property_read_bool(dev->of_node, "mux-states")) {  in can_transceiver_phy_probe()
121 			return dev_err_probe(&pdev->dev, PTR_ERR(mux_state),  in can_transceiver_phy_probe()
122 					     "failed to get mux\n");  in can_transceiver_phy_probe()
123 		can_transceiver_phy->mux_state = mux_state;  in can_transceiver_phy_probe()
126 	phy = devm_phy_create(dev, dev->of_node,  in can_transceiver_phy_probe()
133 	err = device_property_read_u32(dev, "max-bitrate", &max_bitrate);  in can_transceiver_phy_probe()
134 	if ((err != -EINVAL) && !max_bitrate)  in can_transceiver_phy_probe()
136 	phy->attrs.max_link_rate = max_bitrate;  in can_transceiver_phy_probe()
138 	can_transceiver_phy->generic_phy = phy;  in can_transceiver_phy_probe()
140 	if (drvdata->flags & CAN_TRANSCEIVER_STB_PRESENT) {  in can_transceiver_phy_probe()
144 		can_transceiver_phy->standby_gpio = standby_gpio;  in can_transceiver_phy_probe()
147 	if (drvdata->flags & CAN_TRANSCEIVER_EN_PRESENT) {  in can_transceiver_phy_probe()
151 		can_transceiver_phy->enable_gpio = enable_gpio;  in can_transceiver_phy_probe()
154 	phy_set_drvdata(can_transceiver_phy->generic_phy, can_transceiver_phy);  in can_transceiver_phy_probe()
164 		.name = "can-transceiver-phy",
172 MODULE_AUTHOR("Aswath Govindraju <a-govindraju@ti.com>");