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1// SPDX-License-Identifier: GPL-2.02//3// Renesas RAA215300 PMIC driver4//5// Copyright (C) 2023 Renesas Electronics Corporation6//7 8#include <linux/clk.h>9#include <linux/clkdev.h>10#include <linux/clk-provider.h>11#include <linux/err.h>12#include <linux/i2c.h>13#include <linux/module.h>14#include <linux/of.h>15#include <linux/regmap.h>16 17#define RAA215300_FAULT_LATCHED_STATUS_1 0x5918#define RAA215300_FAULT_LATCHED_STATUS_2 0x5a19#define RAA215300_FAULT_LATCHED_STATUS_3 0x5b20#define RAA215300_FAULT_LATCHED_STATUS_4 0x5c21#define RAA215300_FAULT_LATCHED_STATUS_6 0x5e22 23#define RAA215300_INT_MASK_1 0x6424#define RAA215300_INT_MASK_2 0x6525#define RAA215300_INT_MASK_3 0x6626#define RAA215300_INT_MASK_4 0x6727#define RAA215300_INT_MASK_6 0x6828 29#define RAA215300_REG_BLOCK_EN 0x6c30#define RAA215300_HW_REV 0xf831 32#define RAA215300_INT_MASK_1_ALL GENMASK(5, 0)33#define RAA215300_INT_MASK_2_ALL GENMASK(3, 0)34#define RAA215300_INT_MASK_3_ALL GENMASK(5, 0)35#define RAA215300_INT_MASK_4_ALL BIT(0)36#define RAA215300_INT_MASK_6_ALL GENMASK(7, 0)37 38#define RAA215300_REG_BLOCK_EN_RTC_EN BIT(6)39#define RAA215300_RTC_DEFAULT_ADDR 0x6f40 41static const struct regmap_config raa215300_regmap_config = {42 .reg_bits = 8,43 .val_bits = 8,44 .max_register = 0xff,45};46 47static void raa215300_rtc_unregister_device(void *data)48{49 i2c_unregister_device(data);50}51 52static int raa215300_clk_present(struct i2c_client *client, const char *name)53{54 struct clk *clk;55 56 clk = devm_clk_get_optional(&client->dev, name);57 if (IS_ERR(clk))58 return PTR_ERR(clk);59 60 return !!clk;61}62 63static int raa215300_i2c_probe(struct i2c_client *client)64{65 struct device *dev = &client->dev;66 const char *clkin_name = "clkin";67 unsigned int pmic_version, val;68 const char *xin_name = "xin";69 const char *clk_name = NULL;70 struct regmap *regmap;71 int ret;72 73 regmap = devm_regmap_init_i2c(client, &raa215300_regmap_config);74 if (IS_ERR(regmap))75 return dev_err_probe(dev, PTR_ERR(regmap),76 "regmap i2c init failed\n");77 78 ret = regmap_read(regmap, RAA215300_HW_REV, &pmic_version);79 if (ret < 0)80 return dev_err_probe(dev, ret, "HW rev read failed\n");81 82 dev_dbg(dev, "RAA215300 PMIC version 0x%04x\n", pmic_version);83 84 /* Clear all blocks except RTC, if enabled */85 regmap_read(regmap, RAA215300_REG_BLOCK_EN, &val);86 val &= RAA215300_REG_BLOCK_EN_RTC_EN;87 regmap_write(regmap, RAA215300_REG_BLOCK_EN, val);88 89 /* Clear the latched registers */90 regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_1, &val);91 regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_1, val);92 regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_2, &val);93 regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_2, val);94 regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_3, &val);95 regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_3, val);96 regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_4, &val);97 regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_4, val);98 regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_6, &val);99 regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_6, val);100 101 /* Mask all the PMIC interrupts */102 regmap_write(regmap, RAA215300_INT_MASK_1, RAA215300_INT_MASK_1_ALL);103 regmap_write(regmap, RAA215300_INT_MASK_2, RAA215300_INT_MASK_2_ALL);104 regmap_write(regmap, RAA215300_INT_MASK_3, RAA215300_INT_MASK_3_ALL);105 regmap_write(regmap, RAA215300_INT_MASK_4, RAA215300_INT_MASK_4_ALL);106 regmap_write(regmap, RAA215300_INT_MASK_6, RAA215300_INT_MASK_6_ALL);107 108 ret = raa215300_clk_present(client, xin_name);109 if (ret < 0) {110 return ret;111 } else if (ret) {112 clk_name = xin_name;113 } else {114 ret = raa215300_clk_present(client, clkin_name);115 if (ret < 0)116 return ret;117 if (ret)118 clk_name = clkin_name;119 }120 121 if (clk_name) {122 const char *name = pmic_version >= 0x12 ? "isl1208" : "raa215300_a0";123 struct device_node *np = client->dev.of_node;124 u32 addr = RAA215300_RTC_DEFAULT_ADDR;125 struct i2c_board_info info = {};126 struct i2c_client *rtc_client;127 struct clk_hw *hw;128 ssize_t size;129 130 hw = devm_clk_hw_register_fixed_rate(dev, clk_name, NULL, 0, 32768);131 if (IS_ERR(hw))132 return PTR_ERR(hw);133 134 ret = devm_clk_hw_register_clkdev(dev, hw, clk_name, NULL);135 if (ret)136 return dev_err_probe(dev, ret, "Failed to initialize clkdev\n");137 138 if (np) {139 int i;140 141 i = of_property_match_string(np, "reg-names", "rtc");142 if (i >= 0)143 of_property_read_u32_index(np, "reg", i, &addr);144 }145 146 info.addr = addr;147 if (client->irq > 0)148 info.irq = client->irq;149 150 size = strscpy(info.type, name, sizeof(info.type));151 if (size < 0)152 return dev_err_probe(dev, size,153 "Invalid device name: %s\n", name);154 155 /* Enable RTC block */156 regmap_update_bits(regmap, RAA215300_REG_BLOCK_EN,157 RAA215300_REG_BLOCK_EN_RTC_EN,158 RAA215300_REG_BLOCK_EN_RTC_EN);159 160 rtc_client = i2c_new_client_device(client->adapter, &info);161 if (IS_ERR(rtc_client))162 return PTR_ERR(rtc_client);163 164 ret = devm_add_action_or_reset(dev,165 raa215300_rtc_unregister_device,166 rtc_client);167 if (ret < 0)168 return ret;169 }170 171 return 0;172}173 174static const struct of_device_id raa215300_dt_match[] = {175 { .compatible = "renesas,raa215300" },176 { /* sentinel */ }177};178MODULE_DEVICE_TABLE(of, raa215300_dt_match);179 180static struct i2c_driver raa215300_i2c_driver = {181 .driver = {182 .name = "raa215300",183 .of_match_table = raa215300_dt_match,184 },185 .probe = raa215300_i2c_probe,186};187module_i2c_driver(raa215300_i2c_driver);188 189MODULE_DESCRIPTION("Renesas RAA215300 PMIC driver");190MODULE_AUTHOR("Fabrizio Castro <fabrizio.castro.jz@renesas.com>");191MODULE_AUTHOR("Biju Das <biju.das.jz@bp.renesas.com>");192MODULE_LICENSE("GPL");193