| /* |
| * lm3533-core.c -- LM3533 Core |
| * |
| * Copyright (C) 2011-2012 Texas Instruments |
| * |
| * Author: Johan Hovold <jhovold@gmail.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/err.h> |
| #include <linux/gpio.h> |
| #include <linux/i2c.h> |
| #include <linux/mfd/core.h> |
| #include <linux/regmap.h> |
| #include <linux/seq_file.h> |
| #include <linux/slab.h> |
| #include <linux/uaccess.h> |
| |
| #include <linux/mfd/lm3533.h> |
| |
| |
| #define LM3533_BOOST_OVP_MASK 0x06 |
| #define LM3533_BOOST_OVP_SHIFT 1 |
| |
| #define LM3533_BOOST_FREQ_MASK 0x01 |
| #define LM3533_BOOST_FREQ_SHIFT 0 |
| |
| #define LM3533_BL_ID_MASK 1 |
| #define LM3533_LED_ID_MASK 3 |
| #define LM3533_BL_ID_MAX 1 |
| #define LM3533_LED_ID_MAX 3 |
| |
| #define LM3533_HVLED_ID_MAX 2 |
| #define LM3533_LVLED_ID_MAX 5 |
| |
| #define LM3533_REG_OUTPUT_CONF1 0x10 |
| #define LM3533_REG_OUTPUT_CONF2 0x11 |
| #define LM3533_REG_BOOST_PWM 0x2c |
| |
| #define LM3533_REG_MAX 0xb2 |
| |
| |
| static struct mfd_cell lm3533_als_devs[] = { |
| { |
| .name = "lm3533-als", |
| .id = -1, |
| }, |
| }; |
| |
| static struct mfd_cell lm3533_bl_devs[] = { |
| { |
| .name = "lm3533-backlight", |
| .id = 0, |
| }, |
| { |
| .name = "lm3533-backlight", |
| .id = 1, |
| }, |
| }; |
| |
| static struct mfd_cell lm3533_led_devs[] = { |
| { |
| .name = "lm3533-leds", |
| .id = 0, |
| }, |
| { |
| .name = "lm3533-leds", |
| .id = 1, |
| }, |
| { |
| .name = "lm3533-leds", |
| .id = 2, |
| }, |
| { |
| .name = "lm3533-leds", |
| .id = 3, |
| }, |
| }; |
| |
| int lm3533_read(struct lm3533 *lm3533, u8 reg, u8 *val) |
| { |
| int tmp; |
| int ret; |
| |
| ret = regmap_read(lm3533->regmap, reg, &tmp); |
| if (ret < 0) { |
| dev_err(lm3533->dev, "failed to read register %02x: %d\n", |
| reg, ret); |
| return ret; |
| } |
| |
| *val = tmp; |
| |
| dev_dbg(lm3533->dev, "read [%02x]: %02x\n", reg, *val); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(lm3533_read); |
| |
| int lm3533_write(struct lm3533 *lm3533, u8 reg, u8 val) |
| { |
| int ret; |
| |
| dev_dbg(lm3533->dev, "write [%02x]: %02x\n", reg, val); |
| |
| ret = regmap_write(lm3533->regmap, reg, val); |
| if (ret < 0) { |
| dev_err(lm3533->dev, "failed to write register %02x: %d\n", |
| reg, ret); |
| } |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(lm3533_write); |
| |
| int lm3533_update(struct lm3533 *lm3533, u8 reg, u8 val, u8 mask) |
| { |
| int ret; |
| |
| dev_dbg(lm3533->dev, "update [%02x]: %02x/%02x\n", reg, val, mask); |
| |
| ret = regmap_update_bits(lm3533->regmap, reg, mask, val); |
| if (ret < 0) { |
| dev_err(lm3533->dev, "failed to update register %02x: %d\n", |
| reg, ret); |
| } |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(lm3533_update); |
| |
| static int lm3533_set_boost_freq(struct lm3533 *lm3533, |
| enum lm3533_boost_freq freq) |
| { |
| int ret; |
| |
| ret = lm3533_update(lm3533, LM3533_REG_BOOST_PWM, |
| freq << LM3533_BOOST_FREQ_SHIFT, |
| LM3533_BOOST_FREQ_MASK); |
| if (ret) |
| dev_err(lm3533->dev, "failed to set boost frequency\n"); |
| |
| return ret; |
| } |
| |
| |
| static int lm3533_set_boost_ovp(struct lm3533 *lm3533, |
| enum lm3533_boost_ovp ovp) |
| { |
| int ret; |
| |
| ret = lm3533_update(lm3533, LM3533_REG_BOOST_PWM, |
| ovp << LM3533_BOOST_OVP_SHIFT, |
| LM3533_BOOST_OVP_MASK); |
| if (ret) |
| dev_err(lm3533->dev, "failed to set boost ovp\n"); |
| |
| return ret; |
| } |
| |
| /* |
| * HVLED output config -- output hvled controlled by backlight bl |
| */ |
| static int lm3533_set_hvled_config(struct lm3533 *lm3533, u8 hvled, u8 bl) |
| { |
| u8 val; |
| u8 mask; |
| int shift; |
| int ret; |
| |
| if (hvled == 0 || hvled > LM3533_HVLED_ID_MAX) |
| return -EINVAL; |
| |
| if (bl > LM3533_BL_ID_MAX) |
| return -EINVAL; |
| |
| shift = hvled - 1; |
| mask = LM3533_BL_ID_MASK << shift; |
| val = bl << shift; |
| |
| ret = lm3533_update(lm3533, LM3533_REG_OUTPUT_CONF1, val, mask); |
| if (ret) |
| dev_err(lm3533->dev, "failed to set hvled config\n"); |
| |
| return ret; |
| } |
| |
| /* |
| * LVLED output config -- output lvled controlled by LED led |
| */ |
| static int lm3533_set_lvled_config(struct lm3533 *lm3533, u8 lvled, u8 led) |
| { |
| u8 reg; |
| u8 val; |
| u8 mask; |
| int shift; |
| int ret; |
| |
| if (lvled == 0 || lvled > LM3533_LVLED_ID_MAX) |
| return -EINVAL; |
| |
| if (led > LM3533_LED_ID_MAX) |
| return -EINVAL; |
| |
| if (lvled < 4) { |
| reg = LM3533_REG_OUTPUT_CONF1; |
| shift = 2 * lvled; |
| } else { |
| reg = LM3533_REG_OUTPUT_CONF2; |
| shift = 2 * (lvled - 4); |
| } |
| |
| mask = LM3533_LED_ID_MASK << shift; |
| val = led << shift; |
| |
| ret = lm3533_update(lm3533, reg, val, mask); |
| if (ret) |
| dev_err(lm3533->dev, "failed to set lvled config\n"); |
| |
| return ret; |
| } |
| |
| static void lm3533_enable(struct lm3533 *lm3533) |
| { |
| if (gpio_is_valid(lm3533->gpio_hwen)) |
| gpio_set_value(lm3533->gpio_hwen, 1); |
| } |
| |
| static void lm3533_disable(struct lm3533 *lm3533) |
| { |
| if (gpio_is_valid(lm3533->gpio_hwen)) |
| gpio_set_value(lm3533->gpio_hwen, 0); |
| } |
| |
| enum lm3533_attribute_type { |
| LM3533_ATTR_TYPE_BACKLIGHT, |
| LM3533_ATTR_TYPE_LED, |
| }; |
| |
| struct lm3533_device_attribute { |
| struct device_attribute dev_attr; |
| enum lm3533_attribute_type type; |
| union { |
| struct { |
| u8 id; |
| } output; |
| } u; |
| }; |
| |
| #define to_lm3533_dev_attr(_attr) \ |
| container_of(_attr, struct lm3533_device_attribute, dev_attr) |
| |
| static ssize_t show_output(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct lm3533 *lm3533 = dev_get_drvdata(dev); |
| struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr); |
| int id = lattr->u.output.id; |
| u8 reg; |
| u8 val; |
| u8 mask; |
| int shift; |
| int ret; |
| |
| if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT) { |
| reg = LM3533_REG_OUTPUT_CONF1; |
| shift = id - 1; |
| mask = LM3533_BL_ID_MASK << shift; |
| } else { |
| if (id < 4) { |
| reg = LM3533_REG_OUTPUT_CONF1; |
| shift = 2 * id; |
| } else { |
| reg = LM3533_REG_OUTPUT_CONF2; |
| shift = 2 * (id - 4); |
| } |
| mask = LM3533_LED_ID_MASK << shift; |
| } |
| |
| ret = lm3533_read(lm3533, reg, &val); |
| if (ret) |
| return ret; |
| |
| val = (val & mask) >> shift; |
| |
| return scnprintf(buf, PAGE_SIZE, "%u\n", val); |
| } |
| |
| static ssize_t store_output(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t len) |
| { |
| struct lm3533 *lm3533 = dev_get_drvdata(dev); |
| struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr); |
| int id = lattr->u.output.id; |
| u8 val; |
| int ret; |
| |
| if (kstrtou8(buf, 0, &val)) |
| return -EINVAL; |
| |
| if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT) |
| ret = lm3533_set_hvled_config(lm3533, id, val); |
| else |
| ret = lm3533_set_lvled_config(lm3533, id, val); |
| |
| if (ret) |
| return ret; |
| |
| return len; |
| } |
| |
| #define LM3533_OUTPUT_ATTR(_name, _mode, _show, _store, _type, _id) \ |
| struct lm3533_device_attribute lm3533_dev_attr_##_name = \ |
| { .dev_attr = __ATTR(_name, _mode, _show, _store), \ |
| .type = _type, \ |
| .u.output = { .id = _id }, } |
| |
| #define LM3533_OUTPUT_ATTR_RW(_name, _type, _id) \ |
| LM3533_OUTPUT_ATTR(output_##_name, S_IRUGO | S_IWUSR, \ |
| show_output, store_output, _type, _id) |
| |
| #define LM3533_OUTPUT_HVLED_ATTR_RW(_nr) \ |
| LM3533_OUTPUT_ATTR_RW(hvled##_nr, LM3533_ATTR_TYPE_BACKLIGHT, _nr) |
| #define LM3533_OUTPUT_LVLED_ATTR_RW(_nr) \ |
| LM3533_OUTPUT_ATTR_RW(lvled##_nr, LM3533_ATTR_TYPE_LED, _nr) |
| /* |
| * Output config: |
| * |
| * output_hvled<nr> 0-1 |
| * output_lvled<nr> 0-3 |
| */ |
| static LM3533_OUTPUT_HVLED_ATTR_RW(1); |
| static LM3533_OUTPUT_HVLED_ATTR_RW(2); |
| static LM3533_OUTPUT_LVLED_ATTR_RW(1); |
| static LM3533_OUTPUT_LVLED_ATTR_RW(2); |
| static LM3533_OUTPUT_LVLED_ATTR_RW(3); |
| static LM3533_OUTPUT_LVLED_ATTR_RW(4); |
| static LM3533_OUTPUT_LVLED_ATTR_RW(5); |
| |
| static struct attribute *lm3533_attributes[] = { |
| &lm3533_dev_attr_output_hvled1.dev_attr.attr, |
| &lm3533_dev_attr_output_hvled2.dev_attr.attr, |
| &lm3533_dev_attr_output_lvled1.dev_attr.attr, |
| &lm3533_dev_attr_output_lvled2.dev_attr.attr, |
| &lm3533_dev_attr_output_lvled3.dev_attr.attr, |
| &lm3533_dev_attr_output_lvled4.dev_attr.attr, |
| &lm3533_dev_attr_output_lvled5.dev_attr.attr, |
| NULL, |
| }; |
| |
| #define to_dev_attr(_attr) \ |
| container_of(_attr, struct device_attribute, attr) |
| |
| static umode_t lm3533_attr_is_visible(struct kobject *kobj, |
| struct attribute *attr, int n) |
| { |
| struct device *dev = container_of(kobj, struct device, kobj); |
| struct lm3533 *lm3533 = dev_get_drvdata(dev); |
| struct device_attribute *dattr = to_dev_attr(attr); |
| struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(dattr); |
| enum lm3533_attribute_type type = lattr->type; |
| umode_t mode = attr->mode; |
| |
| if (!lm3533->have_backlights && type == LM3533_ATTR_TYPE_BACKLIGHT) |
| mode = 0; |
| else if (!lm3533->have_leds && type == LM3533_ATTR_TYPE_LED) |
| mode = 0; |
| |
| return mode; |
| }; |
| |
| static struct attribute_group lm3533_attribute_group = { |
| .is_visible = lm3533_attr_is_visible, |
| .attrs = lm3533_attributes |
| }; |
| |
| static int lm3533_device_als_init(struct lm3533 *lm3533) |
| { |
| struct lm3533_platform_data *pdata = lm3533->dev->platform_data; |
| int ret; |
| |
| if (!pdata->als) |
| return 0; |
| |
| lm3533_als_devs[0].platform_data = pdata->als; |
| lm3533_als_devs[0].pdata_size = sizeof(*pdata->als); |
| |
| ret = mfd_add_devices(lm3533->dev, 0, lm3533_als_devs, 1, NULL, |
| 0, NULL); |
| if (ret) { |
| dev_err(lm3533->dev, "failed to add ALS device\n"); |
| return ret; |
| } |
| |
| lm3533->have_als = 1; |
| |
| return 0; |
| } |
| |
| static int lm3533_device_bl_init(struct lm3533 *lm3533) |
| { |
| struct lm3533_platform_data *pdata = lm3533->dev->platform_data; |
| int i; |
| int ret; |
| |
| if (!pdata->backlights || pdata->num_backlights == 0) |
| return 0; |
| |
| if (pdata->num_backlights > ARRAY_SIZE(lm3533_bl_devs)) |
| pdata->num_backlights = ARRAY_SIZE(lm3533_bl_devs); |
| |
| for (i = 0; i < pdata->num_backlights; ++i) { |
| lm3533_bl_devs[i].platform_data = &pdata->backlights[i]; |
| lm3533_bl_devs[i].pdata_size = sizeof(pdata->backlights[i]); |
| } |
| |
| ret = mfd_add_devices(lm3533->dev, 0, lm3533_bl_devs, |
| pdata->num_backlights, NULL, 0, NULL); |
| if (ret) { |
| dev_err(lm3533->dev, "failed to add backlight devices\n"); |
| return ret; |
| } |
| |
| lm3533->have_backlights = 1; |
| |
| return 0; |
| } |
| |
| static int lm3533_device_led_init(struct lm3533 *lm3533) |
| { |
| struct lm3533_platform_data *pdata = lm3533->dev->platform_data; |
| int i; |
| int ret; |
| |
| if (!pdata->leds || pdata->num_leds == 0) |
| return 0; |
| |
| if (pdata->num_leds > ARRAY_SIZE(lm3533_led_devs)) |
| pdata->num_leds = ARRAY_SIZE(lm3533_led_devs); |
| |
| for (i = 0; i < pdata->num_leds; ++i) { |
| lm3533_led_devs[i].platform_data = &pdata->leds[i]; |
| lm3533_led_devs[i].pdata_size = sizeof(pdata->leds[i]); |
| } |
| |
| ret = mfd_add_devices(lm3533->dev, 0, lm3533_led_devs, |
| pdata->num_leds, NULL, 0, NULL); |
| if (ret) { |
| dev_err(lm3533->dev, "failed to add LED devices\n"); |
| return ret; |
| } |
| |
| lm3533->have_leds = 1; |
| |
| return 0; |
| } |
| |
| static int lm3533_device_setup(struct lm3533 *lm3533, |
| struct lm3533_platform_data *pdata) |
| { |
| int ret; |
| |
| ret = lm3533_set_boost_freq(lm3533, pdata->boost_freq); |
| if (ret) |
| return ret; |
| |
| ret = lm3533_set_boost_ovp(lm3533, pdata->boost_ovp); |
| if (ret) |
| return ret; |
| |
| return 0; |
| } |
| |
| static int lm3533_device_init(struct lm3533 *lm3533) |
| { |
| struct lm3533_platform_data *pdata = lm3533->dev->platform_data; |
| int ret; |
| |
| dev_dbg(lm3533->dev, "%s\n", __func__); |
| |
| if (!pdata) { |
| dev_err(lm3533->dev, "no platform data\n"); |
| return -EINVAL; |
| } |
| |
| lm3533->gpio_hwen = pdata->gpio_hwen; |
| |
| dev_set_drvdata(lm3533->dev, lm3533); |
| |
| if (gpio_is_valid(lm3533->gpio_hwen)) { |
| ret = gpio_request_one(lm3533->gpio_hwen, GPIOF_OUT_INIT_LOW, |
| "lm3533-hwen"); |
| if (ret < 0) { |
| dev_err(lm3533->dev, |
| "failed to request HWEN GPIO %d\n", |
| lm3533->gpio_hwen); |
| return ret; |
| } |
| } |
| |
| lm3533_enable(lm3533); |
| |
| ret = lm3533_device_setup(lm3533, pdata); |
| if (ret) |
| goto err_disable; |
| |
| lm3533_device_als_init(lm3533); |
| lm3533_device_bl_init(lm3533); |
| lm3533_device_led_init(lm3533); |
| |
| ret = sysfs_create_group(&lm3533->dev->kobj, &lm3533_attribute_group); |
| if (ret < 0) { |
| dev_err(lm3533->dev, "failed to create sysfs attributes\n"); |
| goto err_unregister; |
| } |
| |
| return 0; |
| |
| err_unregister: |
| mfd_remove_devices(lm3533->dev); |
| err_disable: |
| lm3533_disable(lm3533); |
| if (gpio_is_valid(lm3533->gpio_hwen)) |
| gpio_free(lm3533->gpio_hwen); |
| |
| return ret; |
| } |
| |
| static void __devexit lm3533_device_exit(struct lm3533 *lm3533) |
| { |
| dev_dbg(lm3533->dev, "%s\n", __func__); |
| |
| sysfs_remove_group(&lm3533->dev->kobj, &lm3533_attribute_group); |
| |
| mfd_remove_devices(lm3533->dev); |
| lm3533_disable(lm3533); |
| if (gpio_is_valid(lm3533->gpio_hwen)) |
| gpio_free(lm3533->gpio_hwen); |
| } |
| |
| static bool lm3533_readable_register(struct device *dev, unsigned int reg) |
| { |
| switch (reg) { |
| case 0x10 ... 0x2c: |
| case 0x30 ... 0x38: |
| case 0x40 ... 0x45: |
| case 0x50 ... 0x57: |
| case 0x60 ... 0x6e: |
| case 0x70 ... 0x75: |
| case 0x80 ... 0x85: |
| case 0x90 ... 0x95: |
| case 0xa0 ... 0xa5: |
| case 0xb0 ... 0xb2: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static bool lm3533_volatile_register(struct device *dev, unsigned int reg) |
| { |
| switch (reg) { |
| case 0x34 ... 0x36: /* zone */ |
| case 0x37 ... 0x38: /* adc */ |
| case 0xb0 ... 0xb1: /* fault */ |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static bool lm3533_precious_register(struct device *dev, unsigned int reg) |
| { |
| switch (reg) { |
| case 0x34: /* zone */ |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static struct regmap_config regmap_config = { |
| .reg_bits = 8, |
| .val_bits = 8, |
| .max_register = LM3533_REG_MAX, |
| .readable_reg = lm3533_readable_register, |
| .volatile_reg = lm3533_volatile_register, |
| .precious_reg = lm3533_precious_register, |
| }; |
| |
| static int lm3533_i2c_probe(struct i2c_client *i2c, |
| const struct i2c_device_id *id) |
| { |
| struct lm3533 *lm3533; |
| int ret; |
| |
| dev_dbg(&i2c->dev, "%s\n", __func__); |
| |
| lm3533 = devm_kzalloc(&i2c->dev, sizeof(*lm3533), GFP_KERNEL); |
| if (!lm3533) |
| return -ENOMEM; |
| |
| i2c_set_clientdata(i2c, lm3533); |
| |
| lm3533->regmap = devm_regmap_init_i2c(i2c, ®map_config); |
| if (IS_ERR(lm3533->regmap)) |
| return PTR_ERR(lm3533->regmap); |
| |
| lm3533->dev = &i2c->dev; |
| lm3533->irq = i2c->irq; |
| |
| ret = lm3533_device_init(lm3533); |
| if (ret) |
| return ret; |
| |
| return 0; |
| } |
| |
| static int __devexit lm3533_i2c_remove(struct i2c_client *i2c) |
| { |
| struct lm3533 *lm3533 = i2c_get_clientdata(i2c); |
| |
| dev_dbg(&i2c->dev, "%s\n", __func__); |
| |
| lm3533_device_exit(lm3533); |
| |
| return 0; |
| } |
| |
| static const struct i2c_device_id lm3533_i2c_ids[] = { |
| { "lm3533", 0 }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(i2c, lm3533_i2c_ids); |
| |
| static struct i2c_driver lm3533_i2c_driver = { |
| .driver = { |
| .name = "lm3533", |
| .owner = THIS_MODULE, |
| }, |
| .id_table = lm3533_i2c_ids, |
| .probe = lm3533_i2c_probe, |
| .remove = lm3533_i2c_remove, |
| }; |
| |
| static int __init lm3533_i2c_init(void) |
| { |
| return i2c_add_driver(&lm3533_i2c_driver); |
| } |
| subsys_initcall(lm3533_i2c_init); |
| |
| static void __exit lm3533_i2c_exit(void) |
| { |
| i2c_del_driver(&lm3533_i2c_driver); |
| } |
| module_exit(lm3533_i2c_exit); |
| |
| MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>"); |
| MODULE_DESCRIPTION("LM3533 Core"); |
| MODULE_LICENSE("GPL"); |