2 * lm3533-core.c -- LM3533 Core
4 * Copyright (C) 2011-2012 Texas Instruments
6 * Author: Johan Hovold <jhovold@gmail.com>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/kernel.h>
17 #include <linux/err.h>
18 #include <linux/gpio.h>
19 #include <linux/i2c.h>
20 #include <linux/mfd/core.h>
21 #include <linux/regmap.h>
22 #include <linux/seq_file.h>
23 #include <linux/slab.h>
24 #include <linux/uaccess.h>
26 #include <linux/mfd/lm3533.h>
29 #define LM3533_BOOST_OVP_MASK 0x06
30 #define LM3533_BOOST_OVP_SHIFT 1
32 #define LM3533_BOOST_FREQ_MASK 0x01
33 #define LM3533_BOOST_FREQ_SHIFT 0
35 #define LM3533_BL_ID_MASK 1
36 #define LM3533_LED_ID_MASK 3
37 #define LM3533_BL_ID_MAX 1
38 #define LM3533_LED_ID_MAX 3
40 #define LM3533_HVLED_ID_MAX 2
41 #define LM3533_LVLED_ID_MAX 5
43 #define LM3533_REG_OUTPUT_CONF1 0x10
44 #define LM3533_REG_OUTPUT_CONF2 0x11
45 #define LM3533_REG_BOOST_PWM 0x2c
47 #define LM3533_REG_MAX 0xb2
50 static struct mfd_cell lm3533_als_devs[] = {
57 static struct mfd_cell lm3533_bl_devs[] = {
59 .name = "lm3533-backlight",
63 .name = "lm3533-backlight",
68 static struct mfd_cell lm3533_led_devs[] = {
70 .name = "lm3533-leds",
74 .name = "lm3533-leds",
78 .name = "lm3533-leds",
82 .name = "lm3533-leds",
87 int lm3533_read(struct lm3533 *lm3533, u8 reg, u8 *val)
92 ret = regmap_read(lm3533->regmap, reg, &tmp);
94 dev_err(lm3533->dev, "failed to read register %02x: %d\n",
101 dev_dbg(lm3533->dev, "read [%02x]: %02x\n", reg, *val);
105 EXPORT_SYMBOL_GPL(lm3533_read);
107 int lm3533_write(struct lm3533 *lm3533, u8 reg, u8 val)
111 dev_dbg(lm3533->dev, "write [%02x]: %02x\n", reg, val);
113 ret = regmap_write(lm3533->regmap, reg, val);
115 dev_err(lm3533->dev, "failed to write register %02x: %d\n",
121 EXPORT_SYMBOL_GPL(lm3533_write);
123 int lm3533_update(struct lm3533 *lm3533, u8 reg, u8 val, u8 mask)
127 dev_dbg(lm3533->dev, "update [%02x]: %02x/%02x\n", reg, val, mask);
129 ret = regmap_update_bits(lm3533->regmap, reg, mask, val);
131 dev_err(lm3533->dev, "failed to update register %02x: %d\n",
137 EXPORT_SYMBOL_GPL(lm3533_update);
139 static int lm3533_set_boost_freq(struct lm3533 *lm3533,
140 enum lm3533_boost_freq freq)
144 ret = lm3533_update(lm3533, LM3533_REG_BOOST_PWM,
145 freq << LM3533_BOOST_FREQ_SHIFT,
146 LM3533_BOOST_FREQ_MASK);
148 dev_err(lm3533->dev, "failed to set boost frequency\n");
154 static int lm3533_set_boost_ovp(struct lm3533 *lm3533,
155 enum lm3533_boost_ovp ovp)
159 ret = lm3533_update(lm3533, LM3533_REG_BOOST_PWM,
160 ovp << LM3533_BOOST_OVP_SHIFT,
161 LM3533_BOOST_OVP_MASK);
163 dev_err(lm3533->dev, "failed to set boost ovp\n");
169 * HVLED output config -- output hvled controlled by backlight bl
171 static int lm3533_set_hvled_config(struct lm3533 *lm3533, u8 hvled, u8 bl)
178 if (hvled == 0 || hvled > LM3533_HVLED_ID_MAX)
181 if (bl > LM3533_BL_ID_MAX)
185 mask = LM3533_BL_ID_MASK << shift;
188 ret = lm3533_update(lm3533, LM3533_REG_OUTPUT_CONF1, val, mask);
190 dev_err(lm3533->dev, "failed to set hvled config\n");
196 * LVLED output config -- output lvled controlled by LED led
198 static int lm3533_set_lvled_config(struct lm3533 *lm3533, u8 lvled, u8 led)
206 if (lvled == 0 || lvled > LM3533_LVLED_ID_MAX)
209 if (led > LM3533_LED_ID_MAX)
213 reg = LM3533_REG_OUTPUT_CONF1;
216 reg = LM3533_REG_OUTPUT_CONF2;
217 shift = 2 * (lvled - 4);
220 mask = LM3533_LED_ID_MASK << shift;
223 ret = lm3533_update(lm3533, reg, val, mask);
225 dev_err(lm3533->dev, "failed to set lvled config\n");
230 static void lm3533_enable(struct lm3533 *lm3533)
232 if (gpio_is_valid(lm3533->gpio_hwen))
233 gpio_set_value(lm3533->gpio_hwen, 1);
236 static void lm3533_disable(struct lm3533 *lm3533)
238 if (gpio_is_valid(lm3533->gpio_hwen))
239 gpio_set_value(lm3533->gpio_hwen, 0);
242 enum lm3533_attribute_type {
243 LM3533_ATTR_TYPE_BACKLIGHT,
244 LM3533_ATTR_TYPE_LED,
247 struct lm3533_device_attribute {
248 struct device_attribute dev_attr;
249 enum lm3533_attribute_type type;
257 #define to_lm3533_dev_attr(_attr) \
258 container_of(_attr, struct lm3533_device_attribute, dev_attr)
260 static ssize_t show_output(struct device *dev,
261 struct device_attribute *attr, char *buf)
263 struct lm3533 *lm3533 = dev_get_drvdata(dev);
264 struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr);
265 int id = lattr->u.output.id;
272 if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT) {
273 reg = LM3533_REG_OUTPUT_CONF1;
275 mask = LM3533_BL_ID_MASK << shift;
278 reg = LM3533_REG_OUTPUT_CONF1;
281 reg = LM3533_REG_OUTPUT_CONF2;
282 shift = 2 * (id - 4);
284 mask = LM3533_LED_ID_MASK << shift;
287 ret = lm3533_read(lm3533, reg, &val);
291 val = (val & mask) >> shift;
293 return scnprintf(buf, PAGE_SIZE, "%u\n", val);
296 static ssize_t store_output(struct device *dev,
297 struct device_attribute *attr,
298 const char *buf, size_t len)
300 struct lm3533 *lm3533 = dev_get_drvdata(dev);
301 struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr);
302 int id = lattr->u.output.id;
306 if (kstrtou8(buf, 0, &val))
309 if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT)
310 ret = lm3533_set_hvled_config(lm3533, id, val);
312 ret = lm3533_set_lvled_config(lm3533, id, val);
320 #define LM3533_OUTPUT_ATTR(_name, _mode, _show, _store, _type, _id) \
321 struct lm3533_device_attribute lm3533_dev_attr_##_name = \
322 { .dev_attr = __ATTR(_name, _mode, _show, _store), \
324 .u.output = { .id = _id }, }
326 #define LM3533_OUTPUT_ATTR_RW(_name, _type, _id) \
327 LM3533_OUTPUT_ATTR(output_##_name, S_IRUGO | S_IWUSR, \
328 show_output, store_output, _type, _id)
330 #define LM3533_OUTPUT_HVLED_ATTR_RW(_nr) \
331 LM3533_OUTPUT_ATTR_RW(hvled##_nr, LM3533_ATTR_TYPE_BACKLIGHT, _nr)
332 #define LM3533_OUTPUT_LVLED_ATTR_RW(_nr) \
333 LM3533_OUTPUT_ATTR_RW(lvled##_nr, LM3533_ATTR_TYPE_LED, _nr)
337 * output_hvled<nr> 0-1
338 * output_lvled<nr> 0-3
340 static LM3533_OUTPUT_HVLED_ATTR_RW(1);
341 static LM3533_OUTPUT_HVLED_ATTR_RW(2);
342 static LM3533_OUTPUT_LVLED_ATTR_RW(1);
343 static LM3533_OUTPUT_LVLED_ATTR_RW(2);
344 static LM3533_OUTPUT_LVLED_ATTR_RW(3);
345 static LM3533_OUTPUT_LVLED_ATTR_RW(4);
346 static LM3533_OUTPUT_LVLED_ATTR_RW(5);
348 static struct attribute *lm3533_attributes[] = {
349 &lm3533_dev_attr_output_hvled1.dev_attr.attr,
350 &lm3533_dev_attr_output_hvled2.dev_attr.attr,
351 &lm3533_dev_attr_output_lvled1.dev_attr.attr,
352 &lm3533_dev_attr_output_lvled2.dev_attr.attr,
353 &lm3533_dev_attr_output_lvled3.dev_attr.attr,
354 &lm3533_dev_attr_output_lvled4.dev_attr.attr,
355 &lm3533_dev_attr_output_lvled5.dev_attr.attr,
359 #define to_dev_attr(_attr) \
360 container_of(_attr, struct device_attribute, attr)
362 static umode_t lm3533_attr_is_visible(struct kobject *kobj,
363 struct attribute *attr, int n)
365 struct device *dev = container_of(kobj, struct device, kobj);
366 struct lm3533 *lm3533 = dev_get_drvdata(dev);
367 struct device_attribute *dattr = to_dev_attr(attr);
368 struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(dattr);
369 enum lm3533_attribute_type type = lattr->type;
370 umode_t mode = attr->mode;
372 if (!lm3533->have_backlights && type == LM3533_ATTR_TYPE_BACKLIGHT)
374 else if (!lm3533->have_leds && type == LM3533_ATTR_TYPE_LED)
380 static struct attribute_group lm3533_attribute_group = {
381 .is_visible = lm3533_attr_is_visible,
382 .attrs = lm3533_attributes
385 static int lm3533_device_als_init(struct lm3533 *lm3533)
387 struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
393 lm3533_als_devs[0].platform_data = pdata->als;
394 lm3533_als_devs[0].pdata_size = sizeof(*pdata->als);
396 ret = mfd_add_devices(lm3533->dev, 0, lm3533_als_devs, 1, NULL,
399 dev_err(lm3533->dev, "failed to add ALS device\n");
403 lm3533->have_als = 1;
408 static int lm3533_device_bl_init(struct lm3533 *lm3533)
410 struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
414 if (!pdata->backlights || pdata->num_backlights == 0)
417 if (pdata->num_backlights > ARRAY_SIZE(lm3533_bl_devs))
418 pdata->num_backlights = ARRAY_SIZE(lm3533_bl_devs);
420 for (i = 0; i < pdata->num_backlights; ++i) {
421 lm3533_bl_devs[i].platform_data = &pdata->backlights[i];
422 lm3533_bl_devs[i].pdata_size = sizeof(pdata->backlights[i]);
425 ret = mfd_add_devices(lm3533->dev, 0, lm3533_bl_devs,
426 pdata->num_backlights, NULL, 0, NULL);
428 dev_err(lm3533->dev, "failed to add backlight devices\n");
432 lm3533->have_backlights = 1;
437 static int lm3533_device_led_init(struct lm3533 *lm3533)
439 struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
443 if (!pdata->leds || pdata->num_leds == 0)
446 if (pdata->num_leds > ARRAY_SIZE(lm3533_led_devs))
447 pdata->num_leds = ARRAY_SIZE(lm3533_led_devs);
449 for (i = 0; i < pdata->num_leds; ++i) {
450 lm3533_led_devs[i].platform_data = &pdata->leds[i];
451 lm3533_led_devs[i].pdata_size = sizeof(pdata->leds[i]);
454 ret = mfd_add_devices(lm3533->dev, 0, lm3533_led_devs,
455 pdata->num_leds, NULL, 0, NULL);
457 dev_err(lm3533->dev, "failed to add LED devices\n");
461 lm3533->have_leds = 1;
466 static int lm3533_device_setup(struct lm3533 *lm3533,
467 struct lm3533_platform_data *pdata)
471 ret = lm3533_set_boost_freq(lm3533, pdata->boost_freq);
475 return lm3533_set_boost_ovp(lm3533, pdata->boost_ovp);
478 static int lm3533_device_init(struct lm3533 *lm3533)
480 struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
483 dev_dbg(lm3533->dev, "%s\n", __func__);
486 dev_err(lm3533->dev, "no platform data\n");
490 lm3533->gpio_hwen = pdata->gpio_hwen;
492 dev_set_drvdata(lm3533->dev, lm3533);
494 if (gpio_is_valid(lm3533->gpio_hwen)) {
495 ret = devm_gpio_request_one(lm3533->dev, lm3533->gpio_hwen,
496 GPIOF_OUT_INIT_LOW, "lm3533-hwen");
499 "failed to request HWEN GPIO %d\n",
505 lm3533_enable(lm3533);
507 ret = lm3533_device_setup(lm3533, pdata);
511 lm3533_device_als_init(lm3533);
512 lm3533_device_bl_init(lm3533);
513 lm3533_device_led_init(lm3533);
515 ret = sysfs_create_group(&lm3533->dev->kobj, &lm3533_attribute_group);
517 dev_err(lm3533->dev, "failed to create sysfs attributes\n");
524 mfd_remove_devices(lm3533->dev);
526 lm3533_disable(lm3533);
531 static void lm3533_device_exit(struct lm3533 *lm3533)
533 dev_dbg(lm3533->dev, "%s\n", __func__);
535 sysfs_remove_group(&lm3533->dev->kobj, &lm3533_attribute_group);
537 mfd_remove_devices(lm3533->dev);
538 lm3533_disable(lm3533);
541 static bool lm3533_readable_register(struct device *dev, unsigned int reg)
560 static bool lm3533_volatile_register(struct device *dev, unsigned int reg)
563 case 0x34 ... 0x36: /* zone */
564 case 0x37 ... 0x38: /* adc */
565 case 0xb0 ... 0xb1: /* fault */
572 static bool lm3533_precious_register(struct device *dev, unsigned int reg)
575 case 0x34: /* zone */
582 static const struct regmap_config regmap_config = {
585 .max_register = LM3533_REG_MAX,
586 .readable_reg = lm3533_readable_register,
587 .volatile_reg = lm3533_volatile_register,
588 .precious_reg = lm3533_precious_register,
591 static int lm3533_i2c_probe(struct i2c_client *i2c,
592 const struct i2c_device_id *id)
594 struct lm3533 *lm3533;
596 dev_dbg(&i2c->dev, "%s\n", __func__);
598 lm3533 = devm_kzalloc(&i2c->dev, sizeof(*lm3533), GFP_KERNEL);
602 i2c_set_clientdata(i2c, lm3533);
604 lm3533->regmap = devm_regmap_init_i2c(i2c, ®map_config);
605 if (IS_ERR(lm3533->regmap))
606 return PTR_ERR(lm3533->regmap);
608 lm3533->dev = &i2c->dev;
609 lm3533->irq = i2c->irq;
611 return lm3533_device_init(lm3533);
614 static int lm3533_i2c_remove(struct i2c_client *i2c)
616 struct lm3533 *lm3533 = i2c_get_clientdata(i2c);
618 dev_dbg(&i2c->dev, "%s\n", __func__);
620 lm3533_device_exit(lm3533);
625 static const struct i2c_device_id lm3533_i2c_ids[] = {
629 MODULE_DEVICE_TABLE(i2c, lm3533_i2c_ids);
631 static struct i2c_driver lm3533_i2c_driver = {
635 .id_table = lm3533_i2c_ids,
636 .probe = lm3533_i2c_probe,
637 .remove = lm3533_i2c_remove,
640 static int __init lm3533_i2c_init(void)
642 return i2c_add_driver(&lm3533_i2c_driver);
644 subsys_initcall(lm3533_i2c_init);
646 static void __exit lm3533_i2c_exit(void)
648 i2c_del_driver(&lm3533_i2c_driver);
650 module_exit(lm3533_i2c_exit);
652 MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
653 MODULE_DESCRIPTION("LM3533 Core");
654 MODULE_LICENSE("GPL");