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4315eab705
Fixes in drivers for: - Binding fix for g12a phys - Kconfig operator precedence for TI driver - renesas: register setting - sunplus: null deref fix - rockchip-inno fix for clk_disable_unprepare() - MDM9607 init sequence revert due to regression -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEE+vs47OPLdNbVcHzyfBQHDyUjg0cFAmPKqp8ACgkQfBQHDyUj g0c8QxAAlT17OSekO44/4j1ZPc1c0fvgf0CEDE6xrcfoD7taByuvFK7gm2NGYSaT 5RNYDniiMBDgchxHvy4BoEAXqrTbGLC6uFBlZ3BcEMM9ONFSU5t/J7YK0gH1WdSq 15Bp491XhWGVr3KlqAxgtatv7qgi0JS/mRmjXnN5ytIxETCqzPWwWvMtMRudQFTy g3pydR1j4bTu/9yhBWfw6OIOnPVRTTmiEaqxUmahTCRld9YWvPLLJCCllZIh3YKS kDF3UKDP0nRTPH7LqPlZtnOFdM0yq8lU8Wzt4Y+QVzTUr2OZ7+hCK03c/kVIA/5e 5tRValarw5hpZ0BfRAqhRIFFkh6K7ImqlMuuduZnDG8v/m7XKse7y2HaVOn9wDY8 l4FgrzJxSbfQzyPk3JYds+9tQezM1IGAc0FxarqY99NYMwHbqAHPs+W/Ft2tRY3W ncG5j9YcGAdIZ/qa9/rY1Qdm9UOkzba9/bsi6ahQcW6QmtrmTtKgs2SKTpGOEnly qwjmjKynVByZ8Kf3310lmhHm8TPs/vN0SAKbzh0VLacAcYmJMV9bN/E/DLzttkKP lFx0GZ1WdyIlQaT/pXMGBPM2fux9oyNIKDn6sRmfe6ybx+I3e1UrHtgJa9HoyJet iJQibehGdM+o+RP12lO97IsvzN1qHhfPkN144r/PZwK95UJsWDM= =MDsZ -----END PGP SIGNATURE----- Merge tag 'phy-fixes-6.2' into next Merge fixes tag pulled into mainline by Linus into phy/next due to dependency on amlogic patches
174 lines
4.8 KiB
C
174 lines
4.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* phy-can-transceiver.c - phy driver for CAN transceivers
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*
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* Copyright (C) 2021 Texas Instruments Incorporated - https://www.ti.com
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*
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*/
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#include<linux/phy/phy.h>
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#include<linux/platform_device.h>
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#include<linux/module.h>
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#include<linux/gpio.h>
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#include<linux/gpio/consumer.h>
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#include <linux/mux/consumer.h>
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struct can_transceiver_data {
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u32 flags;
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#define CAN_TRANSCEIVER_STB_PRESENT BIT(0)
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#define CAN_TRANSCEIVER_EN_PRESENT BIT(1)
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};
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struct can_transceiver_phy {
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struct phy *generic_phy;
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struct gpio_desc *standby_gpio;
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struct gpio_desc *enable_gpio;
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struct mux_state *mux_state;
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};
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/* Power on function */
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static int can_transceiver_phy_power_on(struct phy *phy)
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{
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struct can_transceiver_phy *can_transceiver_phy = phy_get_drvdata(phy);
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int ret;
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if (can_transceiver_phy->mux_state) {
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ret = mux_state_select(can_transceiver_phy->mux_state);
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if (ret) {
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dev_err(&phy->dev, "Failed to select CAN mux: %d\n", ret);
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return ret;
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}
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}
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if (can_transceiver_phy->standby_gpio)
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gpiod_set_value_cansleep(can_transceiver_phy->standby_gpio, 0);
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if (can_transceiver_phy->enable_gpio)
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gpiod_set_value_cansleep(can_transceiver_phy->enable_gpio, 1);
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return 0;
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}
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/* Power off function */
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static int can_transceiver_phy_power_off(struct phy *phy)
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{
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struct can_transceiver_phy *can_transceiver_phy = phy_get_drvdata(phy);
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if (can_transceiver_phy->standby_gpio)
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gpiod_set_value_cansleep(can_transceiver_phy->standby_gpio, 1);
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if (can_transceiver_phy->enable_gpio)
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gpiod_set_value_cansleep(can_transceiver_phy->enable_gpio, 0);
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if (can_transceiver_phy->mux_state)
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mux_state_deselect(can_transceiver_phy->mux_state);
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return 0;
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}
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static const struct phy_ops can_transceiver_phy_ops = {
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.power_on = can_transceiver_phy_power_on,
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.power_off = can_transceiver_phy_power_off,
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.owner = THIS_MODULE,
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};
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static const struct can_transceiver_data tcan1042_drvdata = {
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.flags = CAN_TRANSCEIVER_STB_PRESENT,
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};
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static const struct can_transceiver_data tcan1043_drvdata = {
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.flags = CAN_TRANSCEIVER_STB_PRESENT | CAN_TRANSCEIVER_EN_PRESENT,
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};
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static const struct of_device_id can_transceiver_phy_ids[] = {
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{
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.compatible = "ti,tcan1042",
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.data = &tcan1042_drvdata
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},
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{
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.compatible = "ti,tcan1043",
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.data = &tcan1043_drvdata
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},
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{
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.compatible = "nxp,tjr1443",
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.data = &tcan1043_drvdata
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},
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{ }
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};
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MODULE_DEVICE_TABLE(of, can_transceiver_phy_ids);
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static int can_transceiver_phy_probe(struct platform_device *pdev)
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{
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struct phy_provider *phy_provider;
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struct device *dev = &pdev->dev;
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struct can_transceiver_phy *can_transceiver_phy;
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const struct can_transceiver_data *drvdata;
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const struct of_device_id *match;
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struct phy *phy;
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struct gpio_desc *standby_gpio;
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struct gpio_desc *enable_gpio;
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u32 max_bitrate = 0;
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int err;
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can_transceiver_phy = devm_kzalloc(dev, sizeof(struct can_transceiver_phy), GFP_KERNEL);
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if (!can_transceiver_phy)
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return -ENOMEM;
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match = of_match_node(can_transceiver_phy_ids, pdev->dev.of_node);
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drvdata = match->data;
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if (of_property_read_bool(dev->of_node, "mux-states")) {
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struct mux_state *mux_state;
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mux_state = devm_mux_state_get(dev, NULL);
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if (IS_ERR(mux_state))
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return dev_err_probe(&pdev->dev, PTR_ERR(mux_state),
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"failed to get mux\n");
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can_transceiver_phy->mux_state = mux_state;
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}
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phy = devm_phy_create(dev, dev->of_node,
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&can_transceiver_phy_ops);
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if (IS_ERR(phy)) {
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dev_err(dev, "failed to create can transceiver phy\n");
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return PTR_ERR(phy);
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}
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err = device_property_read_u32(dev, "max-bitrate", &max_bitrate);
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if ((err != -EINVAL) && !max_bitrate)
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dev_warn(dev, "Invalid value for transceiver max bitrate. Ignoring bitrate limit\n");
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phy->attrs.max_link_rate = max_bitrate;
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can_transceiver_phy->generic_phy = phy;
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if (drvdata->flags & CAN_TRANSCEIVER_STB_PRESENT) {
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standby_gpio = devm_gpiod_get_optional(dev, "standby", GPIOD_OUT_HIGH);
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if (IS_ERR(standby_gpio))
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return PTR_ERR(standby_gpio);
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can_transceiver_phy->standby_gpio = standby_gpio;
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}
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if (drvdata->flags & CAN_TRANSCEIVER_EN_PRESENT) {
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enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
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if (IS_ERR(enable_gpio))
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return PTR_ERR(enable_gpio);
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can_transceiver_phy->enable_gpio = enable_gpio;
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}
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phy_set_drvdata(can_transceiver_phy->generic_phy, can_transceiver_phy);
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phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
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return PTR_ERR_OR_ZERO(phy_provider);
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}
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static struct platform_driver can_transceiver_phy_driver = {
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.probe = can_transceiver_phy_probe,
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.driver = {
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.name = "can-transceiver-phy",
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.of_match_table = can_transceiver_phy_ids,
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},
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};
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module_platform_driver(can_transceiver_phy_driver);
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MODULE_AUTHOR("Faiz Abbas <faiz_abbas@ti.com>");
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MODULE_AUTHOR("Aswath Govindraju <a-govindraju@ti.com>");
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MODULE_DESCRIPTION("CAN TRANSCEIVER PHY driver");
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MODULE_LICENSE("GPL v2");
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