1 // SPDX-License-Identifier: GPL-2.0
3 // Renesas RAA215300 PMIC driver
5 // Copyright (C) 2023 Renesas Electronics Corporation
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>
15 #include <linux/regmap.h>
17 #define RAA215300_FAULT_LATCHED_STATUS_1 0x59
18 #define RAA215300_FAULT_LATCHED_STATUS_2 0x5a
19 #define RAA215300_FAULT_LATCHED_STATUS_3 0x5b
20 #define RAA215300_FAULT_LATCHED_STATUS_4 0x5c
21 #define RAA215300_FAULT_LATCHED_STATUS_6 0x5e
23 #define RAA215300_INT_MASK_1 0x64
24 #define RAA215300_INT_MASK_2 0x65
25 #define RAA215300_INT_MASK_3 0x66
26 #define RAA215300_INT_MASK_4 0x67
27 #define RAA215300_INT_MASK_6 0x68
29 #define RAA215300_REG_BLOCK_EN 0x6c
30 #define RAA215300_HW_REV 0xf8
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)
38 #define RAA215300_REG_BLOCK_EN_RTC_EN BIT(6)
39 #define RAA215300_RTC_DEFAULT_ADDR 0x6f
41 const char *clkin_name = "clkin";
42 const char *xin_name = "xin";
43 static struct clk *clk;
45 static const struct regmap_config raa215300_regmap_config = {
51 static void raa215300_rtc_unregister_device(void *data)
53 i2c_unregister_device(data);
55 clk_unregister_fixed_rate(clk);
60 static int raa215300_clk_present(struct i2c_client *client, const char *name)
64 clk = devm_clk_get_optional(&client->dev, name);
71 static int raa215300_i2c_probe(struct i2c_client *client)
73 struct device *dev = &client->dev;
74 const char *clk_name = xin_name;
75 unsigned int pmic_version, val;
76 struct regmap *regmap;
79 regmap = devm_regmap_init_i2c(client, &raa215300_regmap_config);
81 return dev_err_probe(dev, PTR_ERR(regmap),
82 "regmap i2c init failed\n");
84 ret = regmap_read(regmap, RAA215300_HW_REV, &pmic_version);
86 return dev_err_probe(dev, ret, "HW rev read failed\n");
88 dev_dbg(dev, "RAA215300 PMIC version 0x%04x\n", pmic_version);
90 /* Clear all blocks except RTC, if enabled */
91 regmap_read(regmap, RAA215300_REG_BLOCK_EN, &val);
92 val &= RAA215300_REG_BLOCK_EN_RTC_EN;
93 regmap_write(regmap, RAA215300_REG_BLOCK_EN, val);
95 /*Clear the latched registers */
96 regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_1, &val);
97 regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_1, val);
98 regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_2, &val);
99 regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_2, val);
100 regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_3, &val);
101 regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_3, val);
102 regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_4, &val);
103 regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_4, val);
104 regmap_read(regmap, RAA215300_FAULT_LATCHED_STATUS_6, &val);
105 regmap_write(regmap, RAA215300_FAULT_LATCHED_STATUS_6, val);
107 /* Mask all the PMIC interrupts */
108 regmap_write(regmap, RAA215300_INT_MASK_1, RAA215300_INT_MASK_1_ALL);
109 regmap_write(regmap, RAA215300_INT_MASK_2, RAA215300_INT_MASK_2_ALL);
110 regmap_write(regmap, RAA215300_INT_MASK_3, RAA215300_INT_MASK_3_ALL);
111 regmap_write(regmap, RAA215300_INT_MASK_4, RAA215300_INT_MASK_4_ALL);
112 regmap_write(regmap, RAA215300_INT_MASK_6, RAA215300_INT_MASK_6_ALL);
114 ret = raa215300_clk_present(client, xin_name);
118 ret = raa215300_clk_present(client, clkin_name);
122 clk_name = clkin_name;
126 char *name = pmic_version >= 0x12 ? "isl1208" : "raa215300_a0";
127 struct device_node *np = client->dev.of_node;
128 u32 addr = RAA215300_RTC_DEFAULT_ADDR;
129 struct i2c_board_info info = {};
130 struct i2c_client *rtc_client;
133 clk = clk_register_fixed_rate(NULL, clk_name, NULL, 0, 32000);
134 clk_register_clkdev(clk, clk_name, NULL);
139 i = of_property_match_string(np, "reg-names", "rtc");
141 of_property_read_u32_index(np, "reg", i, &addr);
146 info.irq = client->irq;
148 size = strscpy(info.type, name, sizeof(info.type));
150 return dev_err_probe(dev, size,
151 "Invalid device name: %s\n", name);
153 /* Enable RTC block */
154 regmap_update_bits(regmap, RAA215300_REG_BLOCK_EN,
155 RAA215300_REG_BLOCK_EN_RTC_EN,
156 RAA215300_REG_BLOCK_EN_RTC_EN);
158 rtc_client = i2c_new_client_device(client->adapter, &info);
159 if (IS_ERR(rtc_client))
160 return PTR_ERR(rtc_client);
162 ret = devm_add_action_or_reset(dev,
163 raa215300_rtc_unregister_device,
172 static const struct of_device_id raa215300_dt_match[] = {
173 { .compatible = "renesas,raa215300" },
176 MODULE_DEVICE_TABLE(of, raa215300_dt_match);
178 static struct i2c_driver raa215300_i2c_driver = {
181 .of_match_table = raa215300_dt_match,
183 .probe_new = raa215300_i2c_probe,
185 module_i2c_driver(raa215300_i2c_driver);
187 MODULE_DESCRIPTION("Renesas RAA215300 PMIC driver");
188 MODULE_AUTHOR("Fabrizio Castro <fabrizio.castro.jz@renesas.com>");
189 MODULE_AUTHOR("Biju Das <biju.das.jz@bp.renesas.com>");
190 MODULE_LICENSE("GPL");