17bce1663SBiju Das // SPDX-License-Identifier: GPL-2.0 27bce1663SBiju Das // 37bce1663SBiju Das // Renesas RAA215300 PMIC driver 47bce1663SBiju Das // 57bce1663SBiju Das // Copyright (C) 2023 Renesas Electronics Corporation 67bce1663SBiju Das // 77bce1663SBiju Das 87bce1663SBiju Das #include <linux/clk.h> 97bce1663SBiju Das #include <linux/clkdev.h> 107bce1663SBiju Das #include <linux/clk-provider.h> 117bce1663SBiju Das #include <linux/err.h> 127bce1663SBiju Das #include <linux/i2c.h> 137bce1663SBiju Das #include <linux/module.h> 147bce1663SBiju Das #include <linux/of.h> 157bce1663SBiju Das #include <linux/regmap.h> 167bce1663SBiju Das 177bce1663SBiju Das #define RAA215300_FAULT_LATCHED_STATUS_1 0x59 187bce1663SBiju Das #define RAA215300_FAULT_LATCHED_STATUS_2 0x5a 197bce1663SBiju Das #define RAA215300_FAULT_LATCHED_STATUS_3 0x5b 207bce1663SBiju Das #define RAA215300_FAULT_LATCHED_STATUS_4 0x5c 217bce1663SBiju Das #define RAA215300_FAULT_LATCHED_STATUS_6 0x5e 227bce1663SBiju Das 237bce1663SBiju Das #define RAA215300_INT_MASK_1 0x64 247bce1663SBiju Das #define RAA215300_INT_MASK_2 0x65 257bce1663SBiju Das #define RAA215300_INT_MASK_3 0x66 267bce1663SBiju Das #define RAA215300_INT_MASK_4 0x67 277bce1663SBiju Das #define RAA215300_INT_MASK_6 0x68 287bce1663SBiju Das 297bce1663SBiju Das #define RAA215300_REG_BLOCK_EN 0x6c 307bce1663SBiju Das #define RAA215300_HW_REV 0xf8 317bce1663SBiju Das 327bce1663SBiju Das #define RAA215300_INT_MASK_1_ALL GENMASK(5, 0) 337bce1663SBiju Das #define RAA215300_INT_MASK_2_ALL GENMASK(3, 0) 347bce1663SBiju Das #define RAA215300_INT_MASK_3_ALL GENMASK(5, 0) 357bce1663SBiju Das #define RAA215300_INT_MASK_4_ALL BIT(0) 367bce1663SBiju Das #define RAA215300_INT_MASK_6_ALL GENMASK(7, 0) 377bce1663SBiju Das 387bce1663SBiju Das #define RAA215300_REG_BLOCK_EN_RTC_EN BIT(6) 397bce1663SBiju Das #define RAA215300_RTC_DEFAULT_ADDR 0x6f 407bce1663SBiju Das 417bce1663SBiju Das static struct clk *clk; 427bce1663SBiju Das 437bce1663SBiju Das static const struct regmap_config raa215300_regmap_config = { 447bce1663SBiju Das .reg_bits = 8, 457bce1663SBiju Das .val_bits = 8, 467bce1663SBiju Das .max_register = 0xff, 477bce1663SBiju Das }; 487bce1663SBiju Das 497bce1663SBiju Das static void raa215300_rtc_unregister_device(void *data) 507bce1663SBiju Das { 517bce1663SBiju Das i2c_unregister_device(data); 527bce1663SBiju Das if (!clk) { 537bce1663SBiju Das clk_unregister_fixed_rate(clk); 547bce1663SBiju Das clk = NULL; 557bce1663SBiju Das } 567bce1663SBiju Das } 577bce1663SBiju Das 587bce1663SBiju Das static int raa215300_clk_present(struct i2c_client *client, const char *name) 597bce1663SBiju Das { 607bce1663SBiju Das struct clk *clk; 617bce1663SBiju Das 627bce1663SBiju Das clk = devm_clk_get_optional(&client->dev, name); 637bce1663SBiju Das if (IS_ERR(clk)) 647bce1663SBiju Das return PTR_ERR(clk); 657bce1663SBiju Das 667bce1663SBiju Das return !!clk; 677bce1663SBiju Das } 687bce1663SBiju Das 697bce1663SBiju Das static int raa215300_i2c_probe(struct i2c_client *client) 707bce1663SBiju Das { 717bce1663SBiju Das struct device *dev = &client->dev; 72*42a95739SBiju Das const char *clkin_name = "clkin"; 737bce1663SBiju Das unsigned int pmic_version, val; 74*42a95739SBiju Das const char *xin_name = "xin"; 75*42a95739SBiju Das const char *clk_name = NULL; 767bce1663SBiju Das struct regmap *regmap; 777bce1663SBiju Das int ret; 787bce1663SBiju Das 797bce1663SBiju Das regmap = devm_regmap_init_i2c(client, &raa215300_regmap_config); 807bce1663SBiju Das if (IS_ERR(regmap)) 817bce1663SBiju Das return dev_err_probe(dev, PTR_ERR(regmap), 827bce1663SBiju Das "regmap i2c init failed\n"); 837bce1663SBiju Das 847bce1663SBiju Das ret = regmap_read(regmap, RAA215300_HW_REV, &pmic_version); 857bce1663SBiju Das if (ret < 0) 867bce1663SBiju Das return dev_err_probe(dev, ret, "HW rev read failed\n"); 877bce1663SBiju Das 887bce1663SBiju Das dev_dbg(dev, "RAA215300 PMIC version 0x%04x\n", pmic_version); 897bce1663SBiju Das 907bce1663SBiju Das /* Clear all blocks except RTC, if enabled */ 917bce1663SBiju Das regmap_read(regmap, RAA215300_REG_BLOCK_EN, &val); 927bce1663SBiju Das val &= RAA215300_REG_BLOCK_EN_RTC_EN; 937bce1663SBiju Das regmap_write(regmap, RAA215300_REG_BLOCK_EN, val); 947bce1663SBiju Das 957bce1663SBiju Das /*Clear the latched registers */ 967bce1663SBiju Das regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_1, &val); 977bce1663SBiju Das regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_1, val); 987bce1663SBiju Das regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_2, &val); 997bce1663SBiju Das regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_2, val); 1007bce1663SBiju Das regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_3, &val); 1017bce1663SBiju Das regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_3, val); 1027bce1663SBiju Das regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_4, &val); 1037bce1663SBiju Das regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_4, val); 1047bce1663SBiju Das regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_6, &val); 1057bce1663SBiju Das regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_6, val); 1067bce1663SBiju Das 1077bce1663SBiju Das /* Mask all the PMIC interrupts */ 1087bce1663SBiju Das regmap_write(regmap, RAA215300_INT_MASK_1, RAA215300_INT_MASK_1_ALL); 1097bce1663SBiju Das regmap_write(regmap, RAA215300_INT_MASK_2, RAA215300_INT_MASK_2_ALL); 1107bce1663SBiju Das regmap_write(regmap, RAA215300_INT_MASK_3, RAA215300_INT_MASK_3_ALL); 1117bce1663SBiju Das regmap_write(regmap, RAA215300_INT_MASK_4, RAA215300_INT_MASK_4_ALL); 1127bce1663SBiju Das regmap_write(regmap, RAA215300_INT_MASK_6, RAA215300_INT_MASK_6_ALL); 1137bce1663SBiju Das 1147bce1663SBiju Das ret = raa215300_clk_present(client, xin_name); 1157bce1663SBiju Das if (ret < 0) { 1167bce1663SBiju Das return ret; 117*42a95739SBiju Das } else if (ret) { 118*42a95739SBiju Das clk_name = xin_name; 119*42a95739SBiju Das } else { 1207bce1663SBiju Das ret = raa215300_clk_present(client, clkin_name); 1217bce1663SBiju Das if (ret < 0) 1227bce1663SBiju Das return ret; 123*42a95739SBiju Das if (ret) 1247bce1663SBiju Das clk_name = clkin_name; 1257bce1663SBiju Das } 1267bce1663SBiju Das 127*42a95739SBiju Das if (clk_name) { 1287bce1663SBiju Das char *name = pmic_version >= 0x12 ? "isl1208" : "raa215300_a0"; 1297bce1663SBiju Das struct device_node *np = client->dev.of_node; 1307bce1663SBiju Das u32 addr = RAA215300_RTC_DEFAULT_ADDR; 1317bce1663SBiju Das struct i2c_board_info info = {}; 1327bce1663SBiju Das struct i2c_client *rtc_client; 1337bce1663SBiju Das ssize_t size; 1347bce1663SBiju Das 1357bce1663SBiju Das clk = clk_register_fixed_rate(NULL, clk_name, NULL, 0, 32000); 1367bce1663SBiju Das clk_register_clkdev(clk, clk_name, NULL); 1377bce1663SBiju Das 1387bce1663SBiju Das if (np) { 1397bce1663SBiju Das int i; 1407bce1663SBiju Das 1417bce1663SBiju Das i = of_property_match_string(np, "reg-names", "rtc"); 1427bce1663SBiju Das if (i >= 0) 1437bce1663SBiju Das of_property_read_u32_index(np, "reg", i, &addr); 1447bce1663SBiju Das } 1457bce1663SBiju Das 1467bce1663SBiju Das info.addr = addr; 1477bce1663SBiju Das if (client->irq > 0) 1487bce1663SBiju Das info.irq = client->irq; 1497bce1663SBiju Das 1507bce1663SBiju Das size = strscpy(info.type, name, sizeof(info.type)); 1517bce1663SBiju Das if (size < 0) 1527bce1663SBiju Das return dev_err_probe(dev, size, 1537bce1663SBiju Das "Invalid device name: %s\n", name); 1547bce1663SBiju Das 1557bce1663SBiju Das /* Enable RTC block */ 1567bce1663SBiju Das regmap_update_bits(regmap, RAA215300_REG_BLOCK_EN, 1577bce1663SBiju Das RAA215300_REG_BLOCK_EN_RTC_EN, 1587bce1663SBiju Das RAA215300_REG_BLOCK_EN_RTC_EN); 1597bce1663SBiju Das 1607bce1663SBiju Das rtc_client = i2c_new_client_device(client->adapter, &info); 1617bce1663SBiju Das if (IS_ERR(rtc_client)) 1627bce1663SBiju Das return PTR_ERR(rtc_client); 1637bce1663SBiju Das 1647bce1663SBiju Das ret = devm_add_action_or_reset(dev, 1657bce1663SBiju Das raa215300_rtc_unregister_device, 1667bce1663SBiju Das rtc_client); 1677bce1663SBiju Das if (ret < 0) 1687bce1663SBiju Das return ret; 1697bce1663SBiju Das } 1707bce1663SBiju Das 1717bce1663SBiju Das return 0; 1727bce1663SBiju Das } 1737bce1663SBiju Das 1747bce1663SBiju Das static const struct of_device_id raa215300_dt_match[] = { 1757bce1663SBiju Das { .compatible = "renesas,raa215300" }, 1767bce1663SBiju Das { /* sentinel */ } 1777bce1663SBiju Das }; 1787bce1663SBiju Das MODULE_DEVICE_TABLE(of, raa215300_dt_match); 1797bce1663SBiju Das 1807bce1663SBiju Das static struct i2c_driver raa215300_i2c_driver = { 1817bce1663SBiju Das .driver = { 1827bce1663SBiju Das .name = "raa215300", 1837bce1663SBiju Das .of_match_table = raa215300_dt_match, 1847bce1663SBiju Das }, 1857bce1663SBiju Das .probe_new = raa215300_i2c_probe, 1867bce1663SBiju Das }; 1877bce1663SBiju Das module_i2c_driver(raa215300_i2c_driver); 1887bce1663SBiju Das 1897bce1663SBiju Das MODULE_DESCRIPTION("Renesas RAA215300 PMIC driver"); 1907bce1663SBiju Das MODULE_AUTHOR("Fabrizio Castro <fabrizio.castro.jz@renesas.com>"); 1917bce1663SBiju Das MODULE_AUTHOR("Biju Das <biju.das.jz@bp.renesas.com>"); 1927bce1663SBiju Das MODULE_LICENSE("GPL"); 193