1d0f60334SBartosz Golaszewski // SPDX-License-Identifier: GPL-2.0
2d0f60334SBartosz Golaszewski //
3d0f60334SBartosz Golaszewski // Copyright (C) 2018 BayLibre SAS
4d0f60334SBartosz Golaszewski // Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
5d0f60334SBartosz Golaszewski //
6d0f60334SBartosz Golaszewski // Core MFD driver for MAXIM 77650/77651 charger/power-supply.
7d0f60334SBartosz Golaszewski // Programming manual: https://pdfserv.maximintegrated.com/en/an/AN6428.pdf
8d0f60334SBartosz Golaszewski
9d0f60334SBartosz Golaszewski #include <linux/i2c.h>
10d0f60334SBartosz Golaszewski #include <linux/interrupt.h>
11d0f60334SBartosz Golaszewski #include <linux/irq.h>
12d0f60334SBartosz Golaszewski #include <linux/mfd/core.h>
13d0f60334SBartosz Golaszewski #include <linux/mfd/max77650.h>
14d0f60334SBartosz Golaszewski #include <linux/module.h>
15d0f60334SBartosz Golaszewski #include <linux/of.h>
16d0f60334SBartosz Golaszewski #include <linux/regmap.h>
17d0f60334SBartosz Golaszewski
18d0f60334SBartosz Golaszewski #define MAX77650_INT_GPI_F_MSK BIT(0)
19d0f60334SBartosz Golaszewski #define MAX77650_INT_GPI_R_MSK BIT(1)
20d0f60334SBartosz Golaszewski #define MAX77650_INT_GPI_MSK \
21d0f60334SBartosz Golaszewski (MAX77650_INT_GPI_F_MSK | MAX77650_INT_GPI_R_MSK)
22d0f60334SBartosz Golaszewski #define MAX77650_INT_nEN_F_MSK BIT(2)
23d0f60334SBartosz Golaszewski #define MAX77650_INT_nEN_R_MSK BIT(3)
24d0f60334SBartosz Golaszewski #define MAX77650_INT_TJAL1_R_MSK BIT(4)
25d0f60334SBartosz Golaszewski #define MAX77650_INT_TJAL2_R_MSK BIT(5)
26d0f60334SBartosz Golaszewski #define MAX77650_INT_DOD_R_MSK BIT(6)
27d0f60334SBartosz Golaszewski
28d0f60334SBartosz Golaszewski #define MAX77650_INT_THM_MSK BIT(0)
29d0f60334SBartosz Golaszewski #define MAX77650_INT_CHG_MSK BIT(1)
30d0f60334SBartosz Golaszewski #define MAX77650_INT_CHGIN_MSK BIT(2)
31d0f60334SBartosz Golaszewski #define MAX77650_INT_TJ_REG_MSK BIT(3)
32d0f60334SBartosz Golaszewski #define MAX77650_INT_CHGIN_CTRL_MSK BIT(4)
33d0f60334SBartosz Golaszewski #define MAX77650_INT_SYS_CTRL_MSK BIT(5)
34d0f60334SBartosz Golaszewski #define MAX77650_INT_SYS_CNFG_MSK BIT(6)
35d0f60334SBartosz Golaszewski
36d0f60334SBartosz Golaszewski #define MAX77650_INT_GLBL_OFFSET 0
37d0f60334SBartosz Golaszewski #define MAX77650_INT_CHG_OFFSET 1
38d0f60334SBartosz Golaszewski
39d0f60334SBartosz Golaszewski #define MAX77650_SBIA_LPM_MASK BIT(5)
40d0f60334SBartosz Golaszewski #define MAX77650_SBIA_LPM_DISABLED 0x00
41d0f60334SBartosz Golaszewski
42d0f60334SBartosz Golaszewski enum {
43d0f60334SBartosz Golaszewski MAX77650_INT_GPI,
44d0f60334SBartosz Golaszewski MAX77650_INT_nEN_F,
45d0f60334SBartosz Golaszewski MAX77650_INT_nEN_R,
46d0f60334SBartosz Golaszewski MAX77650_INT_TJAL1_R,
47d0f60334SBartosz Golaszewski MAX77650_INT_TJAL2_R,
48d0f60334SBartosz Golaszewski MAX77650_INT_DOD_R,
49d0f60334SBartosz Golaszewski MAX77650_INT_THM,
50d0f60334SBartosz Golaszewski MAX77650_INT_CHG,
51d0f60334SBartosz Golaszewski MAX77650_INT_CHGIN,
52d0f60334SBartosz Golaszewski MAX77650_INT_TJ_REG,
53d0f60334SBartosz Golaszewski MAX77650_INT_CHGIN_CTRL,
54d0f60334SBartosz Golaszewski MAX77650_INT_SYS_CTRL,
55d0f60334SBartosz Golaszewski MAX77650_INT_SYS_CNFG,
56d0f60334SBartosz Golaszewski };
57d0f60334SBartosz Golaszewski
58d0f60334SBartosz Golaszewski static const struct resource max77650_charger_resources[] = {
59d0f60334SBartosz Golaszewski DEFINE_RES_IRQ_NAMED(MAX77650_INT_CHG, "CHG"),
60d0f60334SBartosz Golaszewski DEFINE_RES_IRQ_NAMED(MAX77650_INT_CHGIN, "CHGIN"),
61d0f60334SBartosz Golaszewski };
62d0f60334SBartosz Golaszewski
63d0f60334SBartosz Golaszewski static const struct resource max77650_gpio_resources[] = {
64d0f60334SBartosz Golaszewski DEFINE_RES_IRQ_NAMED(MAX77650_INT_GPI, "GPI"),
65d0f60334SBartosz Golaszewski };
66d0f60334SBartosz Golaszewski
67d0f60334SBartosz Golaszewski static const struct resource max77650_onkey_resources[] = {
68d0f60334SBartosz Golaszewski DEFINE_RES_IRQ_NAMED(MAX77650_INT_nEN_F, "nEN_F"),
69d0f60334SBartosz Golaszewski DEFINE_RES_IRQ_NAMED(MAX77650_INT_nEN_R, "nEN_R"),
70d0f60334SBartosz Golaszewski };
71d0f60334SBartosz Golaszewski
72d0f60334SBartosz Golaszewski static const struct mfd_cell max77650_cells[] = {
73d0f60334SBartosz Golaszewski {
74d0f60334SBartosz Golaszewski .name = "max77650-regulator",
75d0f60334SBartosz Golaszewski .of_compatible = "maxim,max77650-regulator",
76d0f60334SBartosz Golaszewski }, {
77d0f60334SBartosz Golaszewski .name = "max77650-charger",
78d0f60334SBartosz Golaszewski .of_compatible = "maxim,max77650-charger",
79d0f60334SBartosz Golaszewski .resources = max77650_charger_resources,
80d0f60334SBartosz Golaszewski .num_resources = ARRAY_SIZE(max77650_charger_resources),
81d0f60334SBartosz Golaszewski }, {
82d0f60334SBartosz Golaszewski .name = "max77650-gpio",
83d0f60334SBartosz Golaszewski .of_compatible = "maxim,max77650-gpio",
84d0f60334SBartosz Golaszewski .resources = max77650_gpio_resources,
85d0f60334SBartosz Golaszewski .num_resources = ARRAY_SIZE(max77650_gpio_resources),
86d0f60334SBartosz Golaszewski }, {
87d0f60334SBartosz Golaszewski .name = "max77650-led",
88d0f60334SBartosz Golaszewski .of_compatible = "maxim,max77650-led",
89d0f60334SBartosz Golaszewski }, {
90d0f60334SBartosz Golaszewski .name = "max77650-onkey",
91d0f60334SBartosz Golaszewski .of_compatible = "maxim,max77650-onkey",
92d0f60334SBartosz Golaszewski .resources = max77650_onkey_resources,
93d0f60334SBartosz Golaszewski .num_resources = ARRAY_SIZE(max77650_onkey_resources),
94d0f60334SBartosz Golaszewski },
95d0f60334SBartosz Golaszewski };
96d0f60334SBartosz Golaszewski
97d0f60334SBartosz Golaszewski static const struct regmap_irq max77650_irqs[] = {
98d0f60334SBartosz Golaszewski [MAX77650_INT_GPI] = {
99d0f60334SBartosz Golaszewski .reg_offset = MAX77650_INT_GLBL_OFFSET,
100d0f60334SBartosz Golaszewski .mask = MAX77650_INT_GPI_MSK,
101d0f60334SBartosz Golaszewski .type = {
102d0f60334SBartosz Golaszewski .type_falling_val = MAX77650_INT_GPI_F_MSK,
103d0f60334SBartosz Golaszewski .type_rising_val = MAX77650_INT_GPI_R_MSK,
104d0f60334SBartosz Golaszewski .types_supported = IRQ_TYPE_EDGE_BOTH,
105d0f60334SBartosz Golaszewski },
106d0f60334SBartosz Golaszewski },
107d0f60334SBartosz Golaszewski REGMAP_IRQ_REG(MAX77650_INT_nEN_F,
108d0f60334SBartosz Golaszewski MAX77650_INT_GLBL_OFFSET, MAX77650_INT_nEN_F_MSK),
109d0f60334SBartosz Golaszewski REGMAP_IRQ_REG(MAX77650_INT_nEN_R,
110d0f60334SBartosz Golaszewski MAX77650_INT_GLBL_OFFSET, MAX77650_INT_nEN_R_MSK),
111d0f60334SBartosz Golaszewski REGMAP_IRQ_REG(MAX77650_INT_TJAL1_R,
112d0f60334SBartosz Golaszewski MAX77650_INT_GLBL_OFFSET, MAX77650_INT_TJAL1_R_MSK),
113d0f60334SBartosz Golaszewski REGMAP_IRQ_REG(MAX77650_INT_TJAL2_R,
114d0f60334SBartosz Golaszewski MAX77650_INT_GLBL_OFFSET, MAX77650_INT_TJAL2_R_MSK),
115d0f60334SBartosz Golaszewski REGMAP_IRQ_REG(MAX77650_INT_DOD_R,
116d0f60334SBartosz Golaszewski MAX77650_INT_GLBL_OFFSET, MAX77650_INT_DOD_R_MSK),
117d0f60334SBartosz Golaszewski REGMAP_IRQ_REG(MAX77650_INT_THM,
118d0f60334SBartosz Golaszewski MAX77650_INT_CHG_OFFSET, MAX77650_INT_THM_MSK),
119d0f60334SBartosz Golaszewski REGMAP_IRQ_REG(MAX77650_INT_CHG,
120d0f60334SBartosz Golaszewski MAX77650_INT_CHG_OFFSET, MAX77650_INT_CHG_MSK),
121d0f60334SBartosz Golaszewski REGMAP_IRQ_REG(MAX77650_INT_CHGIN,
122d0f60334SBartosz Golaszewski MAX77650_INT_CHG_OFFSET, MAX77650_INT_CHGIN_MSK),
123d0f60334SBartosz Golaszewski REGMAP_IRQ_REG(MAX77650_INT_TJ_REG,
124d0f60334SBartosz Golaszewski MAX77650_INT_CHG_OFFSET, MAX77650_INT_TJ_REG_MSK),
125d0f60334SBartosz Golaszewski REGMAP_IRQ_REG(MAX77650_INT_CHGIN_CTRL,
126d0f60334SBartosz Golaszewski MAX77650_INT_CHG_OFFSET, MAX77650_INT_CHGIN_CTRL_MSK),
127d0f60334SBartosz Golaszewski REGMAP_IRQ_REG(MAX77650_INT_SYS_CTRL,
128d0f60334SBartosz Golaszewski MAX77650_INT_CHG_OFFSET, MAX77650_INT_SYS_CTRL_MSK),
129d0f60334SBartosz Golaszewski REGMAP_IRQ_REG(MAX77650_INT_SYS_CNFG,
130d0f60334SBartosz Golaszewski MAX77650_INT_CHG_OFFSET, MAX77650_INT_SYS_CNFG_MSK),
131d0f60334SBartosz Golaszewski };
132d0f60334SBartosz Golaszewski
133d0f60334SBartosz Golaszewski static const struct regmap_irq_chip max77650_irq_chip = {
134d0f60334SBartosz Golaszewski .name = "max77650-irq",
135d0f60334SBartosz Golaszewski .irqs = max77650_irqs,
136d0f60334SBartosz Golaszewski .num_irqs = ARRAY_SIZE(max77650_irqs),
137d0f60334SBartosz Golaszewski .num_regs = 2,
138d0f60334SBartosz Golaszewski .status_base = MAX77650_REG_INT_GLBL,
139d0f60334SBartosz Golaszewski .mask_base = MAX77650_REG_INTM_GLBL,
140d0f60334SBartosz Golaszewski .type_in_mask = true,
141d0f60334SBartosz Golaszewski .init_ack_masked = true,
142d0f60334SBartosz Golaszewski .clear_on_unmask = true,
143d0f60334SBartosz Golaszewski };
144d0f60334SBartosz Golaszewski
145d0f60334SBartosz Golaszewski static const struct regmap_config max77650_regmap_config = {
146d0f60334SBartosz Golaszewski .name = "max77650",
147d0f60334SBartosz Golaszewski .reg_bits = 8,
148d0f60334SBartosz Golaszewski .val_bits = 8,
149d0f60334SBartosz Golaszewski };
150d0f60334SBartosz Golaszewski
max77650_i2c_probe(struct i2c_client * i2c)151d0f60334SBartosz Golaszewski static int max77650_i2c_probe(struct i2c_client *i2c)
152d0f60334SBartosz Golaszewski {
153d0f60334SBartosz Golaszewski struct regmap_irq_chip_data *irq_data;
154d0f60334SBartosz Golaszewski struct device *dev = &i2c->dev;
155d0f60334SBartosz Golaszewski struct irq_domain *domain;
156d0f60334SBartosz Golaszewski struct regmap *map;
157d0f60334SBartosz Golaszewski unsigned int val;
158d0f60334SBartosz Golaszewski int rv, id;
159d0f60334SBartosz Golaszewski
160d0f60334SBartosz Golaszewski map = devm_regmap_init_i2c(i2c, &max77650_regmap_config);
161d0f60334SBartosz Golaszewski if (IS_ERR(map)) {
162d0f60334SBartosz Golaszewski dev_err(dev, "Unable to initialise I2C Regmap\n");
163d0f60334SBartosz Golaszewski return PTR_ERR(map);
164d0f60334SBartosz Golaszewski }
165d0f60334SBartosz Golaszewski
166d0f60334SBartosz Golaszewski rv = regmap_read(map, MAX77650_REG_CID, &val);
167d0f60334SBartosz Golaszewski if (rv) {
168d0f60334SBartosz Golaszewski dev_err(dev, "Unable to read Chip ID\n");
169d0f60334SBartosz Golaszewski return rv;
170d0f60334SBartosz Golaszewski }
171d0f60334SBartosz Golaszewski
172d0f60334SBartosz Golaszewski id = MAX77650_CID_BITS(val);
173d0f60334SBartosz Golaszewski switch (id) {
174d0f60334SBartosz Golaszewski case MAX77650_CID_77650A:
175d0f60334SBartosz Golaszewski case MAX77650_CID_77650C:
176d0f60334SBartosz Golaszewski case MAX77650_CID_77651A:
177d0f60334SBartosz Golaszewski case MAX77650_CID_77651B:
178d0f60334SBartosz Golaszewski break;
179d0f60334SBartosz Golaszewski default:
180d0f60334SBartosz Golaszewski dev_err(dev, "Chip not supported - ID: 0x%02x\n", id);
181d0f60334SBartosz Golaszewski return -ENODEV;
182d0f60334SBartosz Golaszewski }
183d0f60334SBartosz Golaszewski
184d0f60334SBartosz Golaszewski /*
185d0f60334SBartosz Golaszewski * This IC has a low-power mode which reduces the quiescent current
186d0f60334SBartosz Golaszewski * consumption to ~5.6uA but is only suitable for systems consuming
187d0f60334SBartosz Golaszewski * less than ~2mA. Since this is not likely the case even on
188d0f60334SBartosz Golaszewski * linux-based wearables - keep the chip in normal power mode.
189d0f60334SBartosz Golaszewski */
190d0f60334SBartosz Golaszewski rv = regmap_update_bits(map,
191d0f60334SBartosz Golaszewski MAX77650_REG_CNFG_GLBL,
192d0f60334SBartosz Golaszewski MAX77650_SBIA_LPM_MASK,
193d0f60334SBartosz Golaszewski MAX77650_SBIA_LPM_DISABLED);
194d0f60334SBartosz Golaszewski if (rv) {
195d0f60334SBartosz Golaszewski dev_err(dev, "Unable to change the power mode\n");
196d0f60334SBartosz Golaszewski return rv;
197d0f60334SBartosz Golaszewski }
198d0f60334SBartosz Golaszewski
199d0f60334SBartosz Golaszewski rv = devm_regmap_add_irq_chip(dev, map, i2c->irq,
200d0f60334SBartosz Golaszewski IRQF_ONESHOT | IRQF_SHARED, 0,
201d0f60334SBartosz Golaszewski &max77650_irq_chip, &irq_data);
202d0f60334SBartosz Golaszewski if (rv) {
203d0f60334SBartosz Golaszewski dev_err(dev, "Unable to add Regmap IRQ chip\n");
204d0f60334SBartosz Golaszewski return rv;
205d0f60334SBartosz Golaszewski }
206d0f60334SBartosz Golaszewski
207d0f60334SBartosz Golaszewski domain = regmap_irq_get_domain(irq_data);
208d0f60334SBartosz Golaszewski
209d0f60334SBartosz Golaszewski return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
210d0f60334SBartosz Golaszewski max77650_cells, ARRAY_SIZE(max77650_cells),
211d0f60334SBartosz Golaszewski NULL, 0, domain);
212d0f60334SBartosz Golaszewski }
213d0f60334SBartosz Golaszewski
214d0f60334SBartosz Golaszewski static const struct of_device_id max77650_of_match[] = {
215d0f60334SBartosz Golaszewski { .compatible = "maxim,max77650" },
216d0f60334SBartosz Golaszewski { }
217d0f60334SBartosz Golaszewski };
218d0f60334SBartosz Golaszewski MODULE_DEVICE_TABLE(of, max77650_of_match);
219d0f60334SBartosz Golaszewski
220d0f60334SBartosz Golaszewski static struct i2c_driver max77650_i2c_driver = {
221d0f60334SBartosz Golaszewski .driver = {
222d0f60334SBartosz Golaszewski .name = "max77650",
2234dfdc9a8SKrzysztof Kozlowski .of_match_table = max77650_of_match,
224d0f60334SBartosz Golaszewski },
225*9816d859SUwe Kleine-König .probe = max77650_i2c_probe,
226d0f60334SBartosz Golaszewski };
227d0f60334SBartosz Golaszewski module_i2c_driver(max77650_i2c_driver);
228d0f60334SBartosz Golaszewski
229d0f60334SBartosz Golaszewski MODULE_DESCRIPTION("MAXIM 77650/77651 multi-function core driver");
230d0f60334SBartosz Golaszewski MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
231d0f60334SBartosz Golaszewski MODULE_LICENSE("GPL v2");
232