1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * lm3533-core.c -- LM3533 Core
5 * Copyright (C) 2011-2012 Texas Instruments
7 * Author: Johan Hovold <jhovold@gmail.com>
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/kernel.h>
13 #include <linux/err.h>
14 #include <linux/gpio.h>
15 #include <linux/i2c.h>
16 #include <linux/mfd/core.h>
17 #include <linux/regmap.h>
18 #include <linux/seq_file.h>
19 #include <linux/slab.h>
20 #include <linux/uaccess.h>
22 #include <linux/mfd/lm3533.h>
25 #define LM3533_BOOST_OVP_MASK 0x06
26 #define LM3533_BOOST_OVP_SHIFT 1
28 #define LM3533_BOOST_FREQ_MASK 0x01
29 #define LM3533_BOOST_FREQ_SHIFT 0
31 #define LM3533_BL_ID_MASK 1
32 #define LM3533_LED_ID_MASK 3
33 #define LM3533_BL_ID_MAX 1
34 #define LM3533_LED_ID_MAX 3
36 #define LM3533_HVLED_ID_MAX 2
37 #define LM3533_LVLED_ID_MAX 5
39 #define LM3533_REG_OUTPUT_CONF1 0x10
40 #define LM3533_REG_OUTPUT_CONF2 0x11
41 #define LM3533_REG_BOOST_PWM 0x2c
43 #define LM3533_REG_MAX 0xb2
46 static struct mfd_cell lm3533_als_devs[] = {
53 static struct mfd_cell lm3533_bl_devs[] = {
55 .name = "lm3533-backlight",
59 .name = "lm3533-backlight",
64 static struct mfd_cell lm3533_led_devs[] = {
66 .name = "lm3533-leds",
70 .name = "lm3533-leds",
74 .name = "lm3533-leds",
78 .name = "lm3533-leds",
83 int lm3533_read(struct lm3533 *lm3533, u8 reg, u8 *val)
88 ret = regmap_read(lm3533->regmap, reg, &tmp);
90 dev_err(lm3533->dev, "failed to read register %02x: %d\n",
97 dev_dbg(lm3533->dev, "read [%02x]: %02x\n", reg, *val);
101 EXPORT_SYMBOL_GPL(lm3533_read);
103 int lm3533_write(struct lm3533 *lm3533, u8 reg, u8 val)
107 dev_dbg(lm3533->dev, "write [%02x]: %02x\n", reg, val);
109 ret = regmap_write(lm3533->regmap, reg, val);
111 dev_err(lm3533->dev, "failed to write register %02x: %d\n",
117 EXPORT_SYMBOL_GPL(lm3533_write);
119 int lm3533_update(struct lm3533 *lm3533, u8 reg, u8 val, u8 mask)
123 dev_dbg(lm3533->dev, "update [%02x]: %02x/%02x\n", reg, val, mask);
125 ret = regmap_update_bits(lm3533->regmap, reg, mask, val);
127 dev_err(lm3533->dev, "failed to update register %02x: %d\n",
133 EXPORT_SYMBOL_GPL(lm3533_update);
135 static int lm3533_set_boost_freq(struct lm3533 *lm3533,
136 enum lm3533_boost_freq freq)
140 ret = lm3533_update(lm3533, LM3533_REG_BOOST_PWM,
141 freq << LM3533_BOOST_FREQ_SHIFT,
142 LM3533_BOOST_FREQ_MASK);
144 dev_err(lm3533->dev, "failed to set boost frequency\n");
150 static int lm3533_set_boost_ovp(struct lm3533 *lm3533,
151 enum lm3533_boost_ovp ovp)
155 ret = lm3533_update(lm3533, LM3533_REG_BOOST_PWM,
156 ovp << LM3533_BOOST_OVP_SHIFT,
157 LM3533_BOOST_OVP_MASK);
159 dev_err(lm3533->dev, "failed to set boost ovp\n");
165 * HVLED output config -- output hvled controlled by backlight bl
167 static int lm3533_set_hvled_config(struct lm3533 *lm3533, u8 hvled, u8 bl)
174 if (hvled == 0 || hvled > LM3533_HVLED_ID_MAX)
177 if (bl > LM3533_BL_ID_MAX)
181 mask = LM3533_BL_ID_MASK << shift;
184 ret = lm3533_update(lm3533, LM3533_REG_OUTPUT_CONF1, val, mask);
186 dev_err(lm3533->dev, "failed to set hvled config\n");
192 * LVLED output config -- output lvled controlled by LED led
194 static int lm3533_set_lvled_config(struct lm3533 *lm3533, u8 lvled, u8 led)
202 if (lvled == 0 || lvled > LM3533_LVLED_ID_MAX)
205 if (led > LM3533_LED_ID_MAX)
209 reg = LM3533_REG_OUTPUT_CONF1;
212 reg = LM3533_REG_OUTPUT_CONF2;
213 shift = 2 * (lvled - 4);
216 mask = LM3533_LED_ID_MASK << shift;
219 ret = lm3533_update(lm3533, reg, val, mask);
221 dev_err(lm3533->dev, "failed to set lvled config\n");
226 static void lm3533_enable(struct lm3533 *lm3533)
228 if (gpio_is_valid(lm3533->gpio_hwen))
229 gpio_set_value(lm3533->gpio_hwen, 1);
232 static void lm3533_disable(struct lm3533 *lm3533)
234 if (gpio_is_valid(lm3533->gpio_hwen))
235 gpio_set_value(lm3533->gpio_hwen, 0);
238 enum lm3533_attribute_type {
239 LM3533_ATTR_TYPE_BACKLIGHT,
240 LM3533_ATTR_TYPE_LED,
243 struct lm3533_device_attribute {
244 struct device_attribute dev_attr;
245 enum lm3533_attribute_type type;
253 #define to_lm3533_dev_attr(_attr) \
254 container_of(_attr, struct lm3533_device_attribute, dev_attr)
256 static ssize_t show_output(struct device *dev,
257 struct device_attribute *attr, char *buf)
259 struct lm3533 *lm3533 = dev_get_drvdata(dev);
260 struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr);
261 int id = lattr->u.output.id;
268 if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT) {
269 reg = LM3533_REG_OUTPUT_CONF1;
271 mask = LM3533_BL_ID_MASK << shift;
274 reg = LM3533_REG_OUTPUT_CONF1;
277 reg = LM3533_REG_OUTPUT_CONF2;
278 shift = 2 * (id - 4);
280 mask = LM3533_LED_ID_MASK << shift;
283 ret = lm3533_read(lm3533, reg, &val);
287 val = (val & mask) >> shift;
289 return scnprintf(buf, PAGE_SIZE, "%u\n", val);
292 static ssize_t store_output(struct device *dev,
293 struct device_attribute *attr,
294 const char *buf, size_t len)
296 struct lm3533 *lm3533 = dev_get_drvdata(dev);
297 struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr);
298 int id = lattr->u.output.id;
302 if (kstrtou8(buf, 0, &val))
305 if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT)
306 ret = lm3533_set_hvled_config(lm3533, id, val);
308 ret = lm3533_set_lvled_config(lm3533, id, val);
316 #define LM3533_OUTPUT_ATTR(_name, _mode, _show, _store, _type, _id) \
317 struct lm3533_device_attribute lm3533_dev_attr_##_name = \
318 { .dev_attr = __ATTR(_name, _mode, _show, _store), \
320 .u.output = { .id = _id }, }
322 #define LM3533_OUTPUT_ATTR_RW(_name, _type, _id) \
323 LM3533_OUTPUT_ATTR(output_##_name, S_IRUGO | S_IWUSR, \
324 show_output, store_output, _type, _id)
326 #define LM3533_OUTPUT_HVLED_ATTR_RW(_nr) \
327 LM3533_OUTPUT_ATTR_RW(hvled##_nr, LM3533_ATTR_TYPE_BACKLIGHT, _nr)
328 #define LM3533_OUTPUT_LVLED_ATTR_RW(_nr) \
329 LM3533_OUTPUT_ATTR_RW(lvled##_nr, LM3533_ATTR_TYPE_LED, _nr)
333 * output_hvled<nr> 0-1
334 * output_lvled<nr> 0-3
336 static LM3533_OUTPUT_HVLED_ATTR_RW(1);
337 static LM3533_OUTPUT_HVLED_ATTR_RW(2);
338 static LM3533_OUTPUT_LVLED_ATTR_RW(1);
339 static LM3533_OUTPUT_LVLED_ATTR_RW(2);
340 static LM3533_OUTPUT_LVLED_ATTR_RW(3);
341 static LM3533_OUTPUT_LVLED_ATTR_RW(4);
342 static LM3533_OUTPUT_LVLED_ATTR_RW(5);
344 static struct attribute *lm3533_attributes[] = {
345 &lm3533_dev_attr_output_hvled1.dev_attr.attr,
346 &lm3533_dev_attr_output_hvled2.dev_attr.attr,
347 &lm3533_dev_attr_output_lvled1.dev_attr.attr,
348 &lm3533_dev_attr_output_lvled2.dev_attr.attr,
349 &lm3533_dev_attr_output_lvled3.dev_attr.attr,
350 &lm3533_dev_attr_output_lvled4.dev_attr.attr,
351 &lm3533_dev_attr_output_lvled5.dev_attr.attr,
355 #define to_dev_attr(_attr) \
356 container_of(_attr, struct device_attribute, attr)
358 static umode_t lm3533_attr_is_visible(struct kobject *kobj,
359 struct attribute *attr, int n)
361 struct device *dev = container_of(kobj, struct device, kobj);
362 struct lm3533 *lm3533 = dev_get_drvdata(dev);
363 struct device_attribute *dattr = to_dev_attr(attr);
364 struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(dattr);
365 enum lm3533_attribute_type type = lattr->type;
366 umode_t mode = attr->mode;
368 if (!lm3533->have_backlights && type == LM3533_ATTR_TYPE_BACKLIGHT)
370 else if (!lm3533->have_leds && type == LM3533_ATTR_TYPE_LED)
376 static struct attribute_group lm3533_attribute_group = {
377 .is_visible = lm3533_attr_is_visible,
378 .attrs = lm3533_attributes
381 static int lm3533_device_als_init(struct lm3533 *lm3533)
383 struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
389 lm3533_als_devs[0].platform_data = pdata->als;
390 lm3533_als_devs[0].pdata_size = sizeof(*pdata->als);
392 ret = mfd_add_devices(lm3533->dev, 0, lm3533_als_devs, 1, NULL,
395 dev_err(lm3533->dev, "failed to add ALS device\n");
399 lm3533->have_als = 1;
404 static int lm3533_device_bl_init(struct lm3533 *lm3533)
406 struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
410 if (!pdata->backlights || pdata->num_backlights == 0)
413 if (pdata->num_backlights > ARRAY_SIZE(lm3533_bl_devs))
414 pdata->num_backlights = ARRAY_SIZE(lm3533_bl_devs);
416 for (i = 0; i < pdata->num_backlights; ++i) {
417 lm3533_bl_devs[i].platform_data = &pdata->backlights[i];
418 lm3533_bl_devs[i].pdata_size = sizeof(pdata->backlights[i]);
421 ret = mfd_add_devices(lm3533->dev, 0, lm3533_bl_devs,
422 pdata->num_backlights, NULL, 0, NULL);
424 dev_err(lm3533->dev, "failed to add backlight devices\n");
428 lm3533->have_backlights = 1;
433 static int lm3533_device_led_init(struct lm3533 *lm3533)
435 struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
439 if (!pdata->leds || pdata->num_leds == 0)
442 if (pdata->num_leds > ARRAY_SIZE(lm3533_led_devs))
443 pdata->num_leds = ARRAY_SIZE(lm3533_led_devs);
445 for (i = 0; i < pdata->num_leds; ++i) {
446 lm3533_led_devs[i].platform_data = &pdata->leds[i];
447 lm3533_led_devs[i].pdata_size = sizeof(pdata->leds[i]);
450 ret = mfd_add_devices(lm3533->dev, 0, lm3533_led_devs,
451 pdata->num_leds, NULL, 0, NULL);
453 dev_err(lm3533->dev, "failed to add LED devices\n");
457 lm3533->have_leds = 1;
462 static int lm3533_device_setup(struct lm3533 *lm3533,
463 struct lm3533_platform_data *pdata)
467 ret = lm3533_set_boost_freq(lm3533, pdata->boost_freq);
471 return lm3533_set_boost_ovp(lm3533, pdata->boost_ovp);
474 static int lm3533_device_init(struct lm3533 *lm3533)
476 struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
479 dev_dbg(lm3533->dev, "%s\n", __func__);
482 dev_err(lm3533->dev, "no platform data\n");
486 lm3533->gpio_hwen = pdata->gpio_hwen;
488 dev_set_drvdata(lm3533->dev, lm3533);
490 if (gpio_is_valid(lm3533->gpio_hwen)) {
491 ret = devm_gpio_request_one(lm3533->dev, lm3533->gpio_hwen,
492 GPIOF_OUT_INIT_LOW, "lm3533-hwen");
495 "failed to request HWEN GPIO %d\n",
501 lm3533_enable(lm3533);
503 ret = lm3533_device_setup(lm3533, pdata);
507 lm3533_device_als_init(lm3533);
508 lm3533_device_bl_init(lm3533);
509 lm3533_device_led_init(lm3533);
511 ret = sysfs_create_group(&lm3533->dev->kobj, &lm3533_attribute_group);
513 dev_err(lm3533->dev, "failed to create sysfs attributes\n");
520 mfd_remove_devices(lm3533->dev);
522 lm3533_disable(lm3533);
527 static void lm3533_device_exit(struct lm3533 *lm3533)
529 dev_dbg(lm3533->dev, "%s\n", __func__);
531 sysfs_remove_group(&lm3533->dev->kobj, &lm3533_attribute_group);
533 mfd_remove_devices(lm3533->dev);
534 lm3533_disable(lm3533);
537 static bool lm3533_readable_register(struct device *dev, unsigned int reg)
556 static bool lm3533_volatile_register(struct device *dev, unsigned int reg)
559 case 0x34 ... 0x36: /* zone */
560 case 0x37 ... 0x38: /* adc */
561 case 0xb0 ... 0xb1: /* fault */
568 static bool lm3533_precious_register(struct device *dev, unsigned int reg)
571 case 0x34: /* zone */
578 static const struct regmap_config regmap_config = {
581 .max_register = LM3533_REG_MAX,
582 .readable_reg = lm3533_readable_register,
583 .volatile_reg = lm3533_volatile_register,
584 .precious_reg = lm3533_precious_register,
587 static int lm3533_i2c_probe(struct i2c_client *i2c,
588 const struct i2c_device_id *id)
590 struct lm3533 *lm3533;
592 dev_dbg(&i2c->dev, "%s\n", __func__);
594 lm3533 = devm_kzalloc(&i2c->dev, sizeof(*lm3533), GFP_KERNEL);
598 i2c_set_clientdata(i2c, lm3533);
600 lm3533->regmap = devm_regmap_init_i2c(i2c, ®map_config);
601 if (IS_ERR(lm3533->regmap))
602 return PTR_ERR(lm3533->regmap);
604 lm3533->dev = &i2c->dev;
605 lm3533->irq = i2c->irq;
607 return lm3533_device_init(lm3533);
610 static int lm3533_i2c_remove(struct i2c_client *i2c)
612 struct lm3533 *lm3533 = i2c_get_clientdata(i2c);
614 dev_dbg(&i2c->dev, "%s\n", __func__);
616 lm3533_device_exit(lm3533);
621 static const struct i2c_device_id lm3533_i2c_ids[] = {
625 MODULE_DEVICE_TABLE(i2c, lm3533_i2c_ids);
627 static struct i2c_driver lm3533_i2c_driver = {
631 .id_table = lm3533_i2c_ids,
632 .probe = lm3533_i2c_probe,
633 .remove = lm3533_i2c_remove,
636 static int __init lm3533_i2c_init(void)
638 return i2c_add_driver(&lm3533_i2c_driver);
640 subsys_initcall(lm3533_i2c_init);
642 static void __exit lm3533_i2c_exit(void)
644 i2c_del_driver(&lm3533_i2c_driver);
646 module_exit(lm3533_i2c_exit);
648 MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
649 MODULE_DESCRIPTION("LM3533 Core");
650 MODULE_LICENSE("GPL");