--- /dev/null
+/*
+ * 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 = dev_get_platdata(lm3533->dev);
+ 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 = dev_get_platdata(lm3533->dev);
+ 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 = dev_get_platdata(lm3533->dev);
+ 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 = dev_get_platdata(lm3533->dev);
+ 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 = devm_gpio_request_one(lm3533->dev, 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);
+
+ return ret;
+}
+
+static void 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);
+}
+
+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 const 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 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");
Code Review / kvmfornfv.git / blobdiff