1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Device access for Crystal Cove PMIC
4 *
5 * Copyright (C) 2012-2014, 2022 Intel Corporation. All rights reserved.
6 *
7 * Author: Yang, Bin <bin.yang@intel.com>
8 * Author: Zhu, Lejun <lejun.zhu@linux.intel.com>
9 */
10
11 #include <linux/i2c.h>
12 #include <linux/interrupt.h>
13 #include <linux/mod_devicetable.h>
14 #include <linux/module.h>
15 #include <linux/mfd/core.h>
16 #include <linux/mfd/intel_soc_pmic.h>
17 #include <linux/platform_data/x86/soc.h>
18 #include <linux/pwm.h>
19 #include <linux/regmap.h>
20
21 #define CRYSTAL_COVE_MAX_REGISTER 0xC6
22
23 #define CRYSTAL_COVE_REG_IRQLVL1 0x02
24 #define CRYSTAL_COVE_REG_MIRQLVL1 0x0E
25
26 #define CRYSTAL_COVE_IRQ_PWRSRC 0
27 #define CRYSTAL_COVE_IRQ_THRM 1
28 #define CRYSTAL_COVE_IRQ_BCU 2
29 #define CRYSTAL_COVE_IRQ_ADC 3
30 #define CRYSTAL_COVE_IRQ_CHGR 4
31 #define CRYSTAL_COVE_IRQ_GPIO 5
32 #define CRYSTAL_COVE_IRQ_VHDMIOCP 6
33
34 static const struct resource pwrsrc_resources[] = {
35 DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_PWRSRC, "PWRSRC"),
36 };
37
38 static const struct resource thermal_resources[] = {
39 DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_THRM, "THERMAL"),
40 };
41
42 static const struct resource bcu_resources[] = {
43 DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_BCU, "BCU"),
44 };
45
46 static const struct resource adc_resources[] = {
47 DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_ADC, "ADC"),
48 };
49
50 static const struct resource charger_resources[] = {
51 DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_CHGR, "CHGR"),
52 };
53
54 static const struct resource gpio_resources[] = {
55 DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_GPIO, "GPIO"),
56 };
57
58 static struct mfd_cell crystal_cove_byt_dev[] = {
59 {
60 .name = "crystal_cove_pwrsrc",
61 .num_resources = ARRAY_SIZE(pwrsrc_resources),
62 .resources = pwrsrc_resources,
63 },
64 {
65 .name = "crystal_cove_thermal",
66 .num_resources = ARRAY_SIZE(thermal_resources),
67 .resources = thermal_resources,
68 },
69 {
70 .name = "crystal_cove_bcu",
71 .num_resources = ARRAY_SIZE(bcu_resources),
72 .resources = bcu_resources,
73 },
74 {
75 .name = "crystal_cove_adc",
76 .num_resources = ARRAY_SIZE(adc_resources),
77 .resources = adc_resources,
78 },
79 {
80 .name = "crystal_cove_charger",
81 .num_resources = ARRAY_SIZE(charger_resources),
82 .resources = charger_resources,
83 },
84 {
85 .name = "crystal_cove_gpio",
86 .num_resources = ARRAY_SIZE(gpio_resources),
87 .resources = gpio_resources,
88 },
89 {
90 .name = "byt_crystal_cove_pmic",
91 },
92 {
93 .name = "crystal_cove_pwm",
94 },
95 };
96
97 static struct mfd_cell crystal_cove_cht_dev[] = {
98 {
99 .name = "crystal_cove_gpio",
100 .num_resources = ARRAY_SIZE(gpio_resources),
101 .resources = gpio_resources,
102 },
103 {
104 .name = "cht_crystal_cove_pmic",
105 },
106 {
107 .name = "crystal_cove_pwm",
108 },
109 };
110
111 static const struct regmap_config crystal_cove_regmap_config = {
112 .reg_bits = 8,
113 .val_bits = 8,
114
115 .max_register = CRYSTAL_COVE_MAX_REGISTER,
116 .cache_type = REGCACHE_NONE,
117 };
118
119 static const struct regmap_irq crystal_cove_irqs[] = {
120 REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_PWRSRC, 0, BIT(CRYSTAL_COVE_IRQ_PWRSRC)),
121 REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_THRM, 0, BIT(CRYSTAL_COVE_IRQ_THRM)),
122 REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_BCU, 0, BIT(CRYSTAL_COVE_IRQ_BCU)),
123 REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_ADC, 0, BIT(CRYSTAL_COVE_IRQ_ADC)),
124 REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_CHGR, 0, BIT(CRYSTAL_COVE_IRQ_CHGR)),
125 REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_GPIO, 0, BIT(CRYSTAL_COVE_IRQ_GPIO)),
126 REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_VHDMIOCP, 0, BIT(CRYSTAL_COVE_IRQ_VHDMIOCP)),
127 };
128
129 static const struct regmap_irq_chip crystal_cove_irq_chip = {
130 .name = "Crystal Cove",
131 .irqs = crystal_cove_irqs,
132 .num_irqs = ARRAY_SIZE(crystal_cove_irqs),
133 .num_regs = 1,
134 .status_base = CRYSTAL_COVE_REG_IRQLVL1,
135 .mask_base = CRYSTAL_COVE_REG_MIRQLVL1,
136 };
137
138 /* PWM consumed by the Intel GFX */
139 static struct pwm_lookup crc_pwm_lookup[] = {
140 PWM_LOOKUP_WITH_MODULE("crystal_cove_pwm", 0, "0000:00:02.0",
141 "pwm_pmic_backlight", 0, PWM_POLARITY_NORMAL,
142 "pwm-crc"),
143 };
144
145 struct crystal_cove_config {
146 unsigned long irq_flags;
147 struct mfd_cell *cell_dev;
148 int n_cell_devs;
149 const struct regmap_config *regmap_config;
150 const struct regmap_irq_chip *irq_chip;
151 };
152
153 static const struct crystal_cove_config crystal_cove_config_byt_crc = {
154 .irq_flags = IRQF_TRIGGER_RISING,
155 .cell_dev = crystal_cove_byt_dev,
156 .n_cell_devs = ARRAY_SIZE(crystal_cove_byt_dev),
157 .regmap_config = &crystal_cove_regmap_config,
158 .irq_chip = &crystal_cove_irq_chip,
159 };
160
161 static const struct crystal_cove_config crystal_cove_config_cht_crc = {
162 .irq_flags = IRQF_TRIGGER_RISING,
163 .cell_dev = crystal_cove_cht_dev,
164 .n_cell_devs = ARRAY_SIZE(crystal_cove_cht_dev),
165 .regmap_config = &crystal_cove_regmap_config,
166 .irq_chip = &crystal_cove_irq_chip,
167 };
168
crystal_cove_i2c_probe(struct i2c_client * i2c)169 static int crystal_cove_i2c_probe(struct i2c_client *i2c)
170 {
171 const struct crystal_cove_config *config;
172 struct device *dev = &i2c->dev;
173 struct intel_soc_pmic *pmic;
174 int ret;
175
176 if (soc_intel_is_byt())
177 config = &crystal_cove_config_byt_crc;
178 else
179 config = &crystal_cove_config_cht_crc;
180
181 pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
182 if (!pmic)
183 return -ENOMEM;
184
185 i2c_set_clientdata(i2c, pmic);
186
187 pmic->regmap = devm_regmap_init_i2c(i2c, config->regmap_config);
188 if (IS_ERR(pmic->regmap))
189 return PTR_ERR(pmic->regmap);
190
191 pmic->irq = i2c->irq;
192
193 ret = devm_regmap_add_irq_chip(dev, pmic->regmap, pmic->irq,
194 config->irq_flags | IRQF_ONESHOT,
195 0, config->irq_chip, &pmic->irq_chip_data);
196 if (ret)
197 return ret;
198
199 ret = enable_irq_wake(pmic->irq);
200 if (ret)
201 dev_warn(dev, "Can't enable IRQ as wake source: %d\n", ret);
202
203 /* Add lookup table for crc-pwm */
204 pwm_add_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
205
206 /* To distuingish this domain from the GPIO/charger's irqchip domains */
207 irq_domain_update_bus_token(regmap_irq_get_domain(pmic->irq_chip_data),
208 DOMAIN_BUS_NEXUS);
209
210 ret = mfd_add_devices(dev, PLATFORM_DEVID_NONE, config->cell_dev,
211 config->n_cell_devs, NULL, 0,
212 regmap_irq_get_domain(pmic->irq_chip_data));
213 if (ret)
214 pwm_remove_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
215
216 return ret;
217 }
218
crystal_cove_i2c_remove(struct i2c_client * i2c)219 static void crystal_cove_i2c_remove(struct i2c_client *i2c)
220 {
221 /* remove crc-pwm lookup table */
222 pwm_remove_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
223
224 mfd_remove_devices(&i2c->dev);
225 }
226
crystal_cove_shutdown(struct i2c_client * i2c)227 static void crystal_cove_shutdown(struct i2c_client *i2c)
228 {
229 struct intel_soc_pmic *pmic = i2c_get_clientdata(i2c);
230
231 disable_irq(pmic->irq);
232
233 return;
234 }
235
crystal_cove_suspend(struct device * dev)236 static int crystal_cove_suspend(struct device *dev)
237 {
238 struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
239
240 disable_irq(pmic->irq);
241
242 return 0;
243 }
244
crystal_cove_resume(struct device * dev)245 static int crystal_cove_resume(struct device *dev)
246 {
247 struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
248
249 enable_irq(pmic->irq);
250
251 return 0;
252 }
253
254 static DEFINE_SIMPLE_DEV_PM_OPS(crystal_cove_pm_ops, crystal_cove_suspend, crystal_cove_resume);
255
256 static const struct acpi_device_id crystal_cove_acpi_match[] = {
257 { "INT33FD" },
258 { },
259 };
260 MODULE_DEVICE_TABLE(acpi, crystal_cove_acpi_match);
261
262 static struct i2c_driver crystal_cove_i2c_driver = {
263 .driver = {
264 .name = "crystal_cove_i2c",
265 .pm = pm_sleep_ptr(&crystal_cove_pm_ops),
266 .acpi_match_table = crystal_cove_acpi_match,
267 },
268 .probe = crystal_cove_i2c_probe,
269 .remove = crystal_cove_i2c_remove,
270 .shutdown = crystal_cove_shutdown,
271 };
272
273 module_i2c_driver(crystal_cove_i2c_driver);
274
275 MODULE_DESCRIPTION("I2C driver for Intel SoC PMIC");
276 MODULE_AUTHOR("Yang, Bin <bin.yang@intel.com>");
277 MODULE_AUTHOR("Zhu, Lejun <lejun.zhu@linux.intel.com>");
278