From: Dimitri Fedrau Date: Tue, 2 Jun 2026 08:25:38 +0000 (+0200) Subject: phy: add basic support for NXPs TJA1145 CAN transceiver X-Git-Tag: v7.2-rc1~56^2~2 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e5a9c1c917b59a4aff066b9f317501834c6d5af2;p=thirdparty%2Fkernel%2Flinux.git phy: add basic support for NXPs TJA1145 CAN transceiver Add basic driver support for NXPs TJA1145 CAN transceiver which brings the PHY up/down by switching to normal/standby mode using SPI commands. Tested-by: lee.lockhey@gmail.com Reviewed-by: Marc Kleine-Budde Signed-off-by: Dimitri Fedrau Link: https://patch.msgid.link/20260602-tja1145-support-v6-2-0e0ffc8ee63d@liebherr.com Signed-off-by: Vinod Koul --- diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 7ef342f4bbb6c..19f3b7d12b7d4 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -136,6 +136,16 @@ config PHY_NXP_PTN3222 schemes. It supports all three USB 2.0 data rates: Low Speed, Full Speed and High Speed. +config PHY_NXP_TJA1145 + tristate "NXP TJA1145 CAN transceiver PHY" + select GENERIC_PHY + select REGMAP_SPI + depends on SPI + help + This option enables support for NXPs TJA1145 CAN transceiver as a PHY. + This driver provides function for putting the transceiver in various + functional modes using SPI commands. + config PHY_PISTACHIO_USB tristate "IMG Pistachio USB2.0 PHY driver" depends on MIPS || COMPILE_TEST diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 1e69ed50fb17e..d7aa516bcc49e 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -15,6 +15,7 @@ obj-$(CONFIG_PHY_GOOGLE_USB) += phy-google-usb.o obj-$(CONFIG_USB_LGM_PHY) += phy-lgm-usb.o obj-$(CONFIG_PHY_LPC18XX_USB_OTG) += phy-lpc18xx-usb-otg.o obj-$(CONFIG_PHY_NXP_PTN3222) += phy-nxp-ptn3222.o +obj-$(CONFIG_PHY_NXP_TJA1145) += phy-nxp-tja1145.o obj-$(CONFIG_PHY_PISTACHIO_USB) += phy-pistachio-usb.o obj-$(CONFIG_PHY_SNPS_EUSB2) += phy-snps-eusb2.o obj-$(CONFIG_PHY_XGENE) += phy-xgene.o diff --git a/drivers/phy/phy-nxp-tja1145.c b/drivers/phy/phy-nxp-tja1145.c new file mode 100644 index 0000000000000..1e8bd169743ab --- /dev/null +++ b/drivers/phy/phy-nxp-tja1145.c @@ -0,0 +1,184 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2025 Liebherr-Electronics and Drives GmbH + */ +#include +#include + +#include +#include + +#define TJA1145_MODE_CTRL 0x01 +#define TJA1145_MODE_CTRL_MC GENMASK(2, 0) +#define TJA1145_MODE_CTRL_STBY BIT(2) +#define TJA1145_MODE_CTRL_NORMAL TJA1145_MODE_CTRL_MC + +#define TJA1145_CAN_CTRL 0x20 +#define TJA1145_CAN_CTRL_CMC GENMASK(1, 0) +#define TJA1145_CAN_CTRL_ACTIVE BIT(1) + +#define TJA1145_IDENT 0x7e +#define TJA1145_IDENT_TJA1145T 0x70 + +#define TJA1145_SPI_READ_BIT BIT(0) +#define TJA1145T_MAX_BITRATE 1000000 + +static int tja1145_phy_power_on(struct phy *phy) +{ + struct regmap *map = phy_get_drvdata(phy); + int ret; + + /* + * Switch operating mode to normal which is the active operating mode. + * In this mode, the device is fully operational. + */ + ret = regmap_update_bits(map, TJA1145_MODE_CTRL, TJA1145_MODE_CTRL_MC, + TJA1145_MODE_CTRL_NORMAL); + if (ret) + return ret; + + /* + * Switch to CAN operating mode active where the PHY can transmit and + * receive data. + */ + return regmap_update_bits(map, TJA1145_CAN_CTRL, TJA1145_CAN_CTRL_CMC, + TJA1145_CAN_CTRL_ACTIVE); +} + +static int tja1145_phy_power_off(struct phy *phy) +{ + struct regmap *map = phy_get_drvdata(phy); + + /* + * Switch to operating mode standby, the PHY is unable to transmit or + * receive data in standby mode. + */ + return regmap_update_bits(map, TJA1145_MODE_CTRL, TJA1145_MODE_CTRL_MC, + TJA1145_MODE_CTRL_STBY); +} + +static const struct phy_ops tja1145_phy_ops = { + .power_on = tja1145_phy_power_on, + .power_off = tja1145_phy_power_off, + .owner = THIS_MODULE, +}; + +static const struct regmap_range tja1145_wr_holes_ranges[] = { + regmap_reg_range(0x00, 0x00), + regmap_reg_range(0x02, 0x03), + regmap_reg_range(0x05, 0x05), + regmap_reg_range(0x0b, 0x1f), + regmap_reg_range(0x21, 0x22), + regmap_reg_range(0x24, 0x25), + regmap_reg_range(0x30, 0x4b), + regmap_reg_range(0x4d, 0x60), + regmap_reg_range(0x62, 0x62), + regmap_reg_range(0x65, 0x67), + regmap_reg_range(0x70, 0xff), +}; + +static const struct regmap_access_table tja1145_wr_table = { + .no_ranges = tja1145_wr_holes_ranges, + .n_no_ranges = ARRAY_SIZE(tja1145_wr_holes_ranges), +}; + +static const struct regmap_range tja1145_rd_holes_ranges[] = { + regmap_reg_range(0x00, 0x00), + regmap_reg_range(0x02, 0x02), + regmap_reg_range(0x05, 0x05), + regmap_reg_range(0x0b, 0x1f), + regmap_reg_range(0x21, 0x21), + regmap_reg_range(0x24, 0x25), + regmap_reg_range(0x30, 0x4a), + regmap_reg_range(0x4d, 0x5f), + regmap_reg_range(0x62, 0x62), + regmap_reg_range(0x65, 0x67), + regmap_reg_range(0x70, 0x7d), + regmap_reg_range(0x7f, 0xff), +}; + +static const struct regmap_access_table tja1145_rd_table = { + .no_ranges = tja1145_rd_holes_ranges, + .n_no_ranges = ARRAY_SIZE(tja1145_rd_holes_ranges), +}; + +static const struct regmap_config tja1145_regmap_config = { + .reg_bits = 8, + .reg_shift = -1, + .val_bits = 8, + .wr_table = &tja1145_wr_table, + .rd_table = &tja1145_rd_table, + .read_flag_mask = TJA1145_SPI_READ_BIT, + .max_register = TJA1145_IDENT, +}; + +static int tja1145_check_ident(struct device *dev, struct regmap *map) +{ + unsigned int val; + int ret; + + ret = regmap_read(map, TJA1145_IDENT, &val); + if (ret) + return ret; + + if (val != TJA1145_IDENT_TJA1145T) { + dev_err(dev, "Expected device id: 0x%02x, got: 0x%02x\n", + TJA1145_IDENT_TJA1145T, val); + return -ENODEV; + } + + return 0; +} + +static int tja1145_probe(struct spi_device *spi) +{ + struct phy_provider *phy_provider; + struct device *dev = &spi->dev; + struct regmap *map; + struct phy *phy; + int ret; + + map = devm_regmap_init_spi(spi, &tja1145_regmap_config); + if (IS_ERR(map)) + return dev_err_probe(dev, PTR_ERR(map), "failed to init regmap\n"); + + ret = tja1145_check_ident(dev, map); + if (ret) + return dev_err_probe(dev, ret, "failed to identify device\n"); + + phy = devm_phy_create(dev, dev->of_node, &tja1145_phy_ops); + if (IS_ERR(phy)) + return dev_err_probe(dev, PTR_ERR(phy), "failed to create PHY\n"); + + phy->attrs.max_link_rate = TJA1145T_MAX_BITRATE; + phy_set_drvdata(phy, map); + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + + return PTR_ERR_OR_ZERO(phy_provider); +} + +static const struct spi_device_id tja1145_spi_id[] = { + { "tja1145" }, + { } +}; +MODULE_DEVICE_TABLE(spi, tja1145_spi_id); + +static const struct of_device_id tja1145_of_match[] = { + { .compatible = "nxp,tja1145" }, + { } +}; +MODULE_DEVICE_TABLE(of, tja1145_of_match); + +static struct spi_driver tja1145_driver = { + .driver = { + .name = "tja1145", + .of_match_table = tja1145_of_match, + }, + .probe = tja1145_probe, + .id_table = tja1145_spi_id, +}; +module_spi_driver(tja1145_driver); + +MODULE_DESCRIPTION("NXP TJA1145 CAN transceiver PHY driver"); +MODULE_AUTHOR("Dimitri Fedrau "); +MODULE_LICENSE("GPL");