forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
650 lines
14 KiB
650 lines
14 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* lm3533-core.c -- LM3533 Core |
|
* |
|
* Copyright (C) 2011-2012 Texas Instruments |
|
* |
|
* Author: Johan Hovold <[email protected]> |
|
*/ |
|
|
|
#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; |
|
|
|
return lm3533_set_boost_ovp(lm3533, pdata->boost_ovp); |
|
} |
|
|
|
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; |
|
|
|
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; |
|
|
|
return lm3533_device_init(lm3533); |
|
} |
|
|
|
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", |
|
}, |
|
.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 <[email protected]>"); |
|
MODULE_DESCRIPTION("LM3533 Core"); |
|
MODULE_LICENSE("GPL");
|
|
|