2 * Driver for TPS65218 Integrated power management chipsets
4 * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
11 * kind, whether expressed or implied; without even the implied warranty
12 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License version 2 for more details.
16 #include <linux/kernel.h>
17 #include <linux/device.h>
18 #include <linux/module.h>
19 #include <linux/platform_device.h>
20 #include <linux/init.h>
21 #include <linux/i2c.h>
22 #include <linux/slab.h>
23 #include <linux/regmap.h>
24 #include <linux/err.h>
26 #include <linux/of_device.h>
27 #include <linux/irq.h>
28 #include <linux/interrupt.h>
29 #include <linux/mutex.h>
31 #include <linux/mfd/core.h>
32 #include <linux/mfd/tps65218.h>
34 #define TPS65218_PASSWORD_REGS_UNLOCK 0x7D
37 * tps65218_reg_read: Read a single tps65218 register.
39 * @tps: Device to read from.
40 * @reg: Register to read.
41 * @val: Contians the value
43 int tps65218_reg_read(struct tps65218 *tps, unsigned int reg,
46 return regmap_read(tps->regmap, reg, val);
48 EXPORT_SYMBOL_GPL(tps65218_reg_read);
51 * tps65218_reg_write: Write a single tps65218 register.
53 * @tps65218: Device to write to.
54 * @reg: Register to write to.
55 * @val: Value to write.
56 * @level: Password protected level
58 int tps65218_reg_write(struct tps65218 *tps, unsigned int reg,
59 unsigned int val, unsigned int level)
62 unsigned int xor_reg_val;
65 case TPS65218_PROTECT_NONE:
66 return regmap_write(tps->regmap, reg, val);
67 case TPS65218_PROTECT_L1:
68 xor_reg_val = reg ^ TPS65218_PASSWORD_REGS_UNLOCK;
69 ret = regmap_write(tps->regmap, TPS65218_REG_PASSWORD,
74 return regmap_write(tps->regmap, reg, val);
79 EXPORT_SYMBOL_GPL(tps65218_reg_write);
82 * tps65218_update_bits: Modify bits w.r.t mask, val and level.
84 * @tps65218: Device to write to.
85 * @reg: Register to read-write to.
87 * @val: Value to write.
88 * @level: Password protected level
90 static int tps65218_update_bits(struct tps65218 *tps, unsigned int reg,
91 unsigned int mask, unsigned int val, unsigned int level)
96 ret = tps65218_reg_read(tps, reg, &data);
98 dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
105 mutex_lock(&tps->tps_lock);
106 ret = tps65218_reg_write(tps, reg, data, level);
108 dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
109 mutex_unlock(&tps->tps_lock);
114 int tps65218_set_bits(struct tps65218 *tps, unsigned int reg,
115 unsigned int mask, unsigned int val, unsigned int level)
117 return tps65218_update_bits(tps, reg, mask, val, level);
119 EXPORT_SYMBOL_GPL(tps65218_set_bits);
121 int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg,
122 unsigned int mask, unsigned int level)
124 return tps65218_update_bits(tps, reg, mask, 0, level);
126 EXPORT_SYMBOL_GPL(tps65218_clear_bits);
128 static const struct regmap_range tps65218_yes_ranges[] = {
129 regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2),
130 regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS),
133 static const struct regmap_access_table tps65218_volatile_table = {
134 .yes_ranges = tps65218_yes_ranges,
135 .n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges),
138 static const struct regmap_config tps65218_regmap_config = {
141 .cache_type = REGCACHE_RBTREE,
142 .volatile_table = &tps65218_volatile_table,
145 static const struct regmap_irq tps65218_irqs[] = {
147 [TPS65218_PRGC_IRQ] = {
148 .mask = TPS65218_INT1_PRGC,
150 [TPS65218_CC_AQC_IRQ] = {
151 .mask = TPS65218_INT1_CC_AQC,
153 [TPS65218_HOT_IRQ] = {
154 .mask = TPS65218_INT1_HOT,
156 [TPS65218_PB_IRQ] = {
157 .mask = TPS65218_INT1_PB,
159 [TPS65218_AC_IRQ] = {
160 .mask = TPS65218_INT1_AC,
162 [TPS65218_VPRG_IRQ] = {
163 .mask = TPS65218_INT1_VPRG,
165 [TPS65218_INVALID1_IRQ] = {
167 [TPS65218_INVALID2_IRQ] = {
170 [TPS65218_LS1_I_IRQ] = {
171 .mask = TPS65218_INT2_LS1_I,
174 [TPS65218_LS2_I_IRQ] = {
175 .mask = TPS65218_INT2_LS2_I,
178 [TPS65218_LS3_I_IRQ] = {
179 .mask = TPS65218_INT2_LS3_I,
182 [TPS65218_LS1_F_IRQ] = {
183 .mask = TPS65218_INT2_LS1_F,
186 [TPS65218_LS2_F_IRQ] = {
187 .mask = TPS65218_INT2_LS2_F,
190 [TPS65218_LS3_F_IRQ] = {
191 .mask = TPS65218_INT2_LS3_F,
194 [TPS65218_INVALID3_IRQ] = {
196 [TPS65218_INVALID4_IRQ] = {
200 static struct regmap_irq_chip tps65218_irq_chip = {
202 .irqs = tps65218_irqs,
203 .num_irqs = ARRAY_SIZE(tps65218_irqs),
206 .mask_base = TPS65218_REG_INT_MASK1,
207 .status_base = TPS65218_REG_INT1,
210 static const struct of_device_id of_tps65218_match_table[] = {
211 { .compatible = "ti,tps65218", },
214 MODULE_DEVICE_TABLE(of, of_tps65218_match_table);
216 static int tps65218_probe(struct i2c_client *client,
217 const struct i2c_device_id *ids)
219 struct tps65218 *tps;
220 const struct of_device_id *match;
223 match = of_match_device(of_tps65218_match_table, &client->dev);
225 dev_err(&client->dev,
226 "Failed to find matching dt id\n");
230 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
234 i2c_set_clientdata(client, tps);
235 tps->dev = &client->dev;
236 tps->irq = client->irq;
237 tps->regmap = devm_regmap_init_i2c(client, &tps65218_regmap_config);
238 if (IS_ERR(tps->regmap)) {
239 ret = PTR_ERR(tps->regmap);
240 dev_err(tps->dev, "Failed to allocate register map: %d\n",
245 mutex_init(&tps->tps_lock);
247 ret = regmap_add_irq_chip(tps->regmap, tps->irq,
248 IRQF_ONESHOT, 0, &tps65218_irq_chip,
253 ret = of_platform_populate(client->dev.of_node, NULL, NULL,
261 regmap_del_irq_chip(tps->irq, tps->irq_data);
266 static int tps65218_remove(struct i2c_client *client)
268 struct tps65218 *tps = i2c_get_clientdata(client);
270 regmap_del_irq_chip(tps->irq, tps->irq_data);
275 static const struct i2c_device_id tps65218_id_table[] = {
276 { "tps65218", TPS65218 },
279 MODULE_DEVICE_TABLE(i2c, tps65218_id_table);
281 static struct i2c_driver tps65218_driver = {
284 .of_match_table = of_tps65218_match_table,
286 .probe = tps65218_probe,
287 .remove = tps65218_remove,
288 .id_table = tps65218_id_table,
291 module_i2c_driver(tps65218_driver);
293 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
294 MODULE_DESCRIPTION("TPS65218 chip family multi-function driver");
295 MODULE_LICENSE("GPL v2");