// SPDX-License-Identifier: GPL-2.0-only
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/led-class-flash.h>
#include <linux/led-class-multicolor.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <media/v4l2-flash-led-class.h>
enum {
MT6360_LED_ISNK1 = 0,
MT6360_LED_ISNK2,
MT6360_LED_ISNK3,
MT6360_LED_ISNKML,
MT6360_LED_FLASH1,
MT6360_LED_FLASH2,
MT6360_MAX_LEDS
};
#define MT6360_REG_RGBEN 0x380
#define MT6360_REG_ISNK(_led_no) (0x381 + (_led_no))
#define MT6360_ISNK_ENMASK(_led_no) BIT(7 - (_led_no))
#define MT6360_ISNK_MASK GENMASK(4, 0)
#define MT6360_CHRINDSEL_MASK BIT(3)
/* Virtual definition for multicolor */
#define MT6360_VIRTUAL_MULTICOLOR (MT6360_MAX_LEDS + 1)
#define MULTICOLOR_NUM_CHANNELS 3
#define MT6360_REG_FLEDEN 0x37E
#define MT6360_REG_STRBTO 0x373
#define MT6360_REG_FLEDBASE(_id) (0x372 + 4 * (_id - MT6360_LED_FLASH1))
#define MT6360_REG_FLEDISTRB(_id) (MT6360_REG_FLEDBASE(_id) + 2)
#define MT6360_REG_FLEDITOR(_id) (MT6360_REG_FLEDBASE(_id) + 3)
#define MT6360_REG_CHGSTAT2 0x3E1
#define MT6360_REG_FLEDSTAT1 0x3E9
#define MT6360_ITORCH_MASK GENMASK(4, 0)
#define MT6360_ISTROBE_MASK GENMASK(6, 0)
#define MT6360_STRBTO_MASK GENMASK(6, 0)
#define MT6360_TORCHEN_MASK BIT(3)
#define MT6360_STROBEN_MASK BIT(2)
#define MT6360_FLCSEN_MASK(_id) BIT(MT6360_LED_FLASH2 - _id)
#define MT6360_FLEDCHGVINOVP_MASK BIT(3)
#define MT6360_FLED1STRBTO_MASK BIT(11)
#define MT6360_FLED2STRBTO_MASK BIT(10)
#define MT6360_FLED1STRB_MASK BIT(9)
#define MT6360_FLED2STRB_MASK BIT(8)
#define MT6360_FLED1SHORT_MASK BIT(7)
#define MT6360_FLED2SHORT_MASK BIT(6)
#define MT6360_FLEDLVF_MASK BIT(3)
#define MT6360_ISNKRGB_STEPUA 2000
#define MT6360_ISNKRGB_MAXUA 24000
#define MT6360_ISNKML_STEPUA 5000
#define MT6360_ISNKML_MAXUA 150000
#define MT6360_ITORCH_MINUA 25000
#define MT6360_ITORCH_STEPUA 12500
#define MT6360_ITORCH_MAXUA 400000
#define MT6360_ISTRB_MINUA 50000
#define MT6360_ISTRB_STEPUA 12500
#define MT6360_ISTRB_MAXUA 1500000
#define MT6360_STRBTO_MINUS 64000
#define MT6360_STRBTO_STEPUS 32000
#define MT6360_STRBTO_MAXUS 2432000
struct mt6360_led {
union {
struct led_classdev isnk;
struct led_classdev_mc mc;
struct led_classdev_flash flash;
};
struct v4l2_flash *v4l2_flash;
struct mt6360_priv *priv;
u32 led_no;
enum led_default_state default_state;
};
struct mt6360_priv {
struct device *dev;
struct regmap *regmap;
struct mutex lock;
unsigned int fled_strobe_used;
unsigned int fled_torch_used;
unsigned int leds_active;
unsigned int leds_count;
struct mt6360_led leds[] __counted_by(leds_count);
};
static int mt6360_mc_brightness_set(struct led_classdev *lcdev,
enum led_brightness level)
{
struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
struct mt6360_led *led = container_of(mccdev, struct mt6360_led, mc);
struct mt6360_priv *priv = led->priv;
u32 real_bright, enable_mask = 0, enable = 0;
int i, ret;
mutex_lock(&priv->lock);
led_mc_calc_color_components(mccdev, level);
for (i = 0; i < mccdev->num_colors; i++) {
struct mc_subled *subled = mccdev->subled_info + i;
real_bright = min(lcdev->max_brightness, subled->brightness);
ret = regmap_update_bits(priv->regmap, MT6360_REG_ISNK(i),
MT6360_ISNK_MASK, real_bright);
if (ret)
goto out;
enable_mask |= MT6360_ISNK_ENMASK(subled->channel);
if (real_bright)
enable |= MT6360_ISNK_ENMASK(subled->channel);
}
ret = regmap_update_bits(priv->regmap, MT6360_REG_RGBEN, enable_mask,
enable);
out:
mutex_unlock(&priv->lock);
return ret;
}
static int mt6360_isnk_brightness_set(struct led_classdev *lcdev,
enum led_brightness level)
{
struct mt6360_led *led = container_of(lcdev, struct mt6360_led, isnk);
struct mt6360_priv *priv = led->priv;
u32 enable_mask = MT6360_ISNK_ENMASK(led->led_no);
u32 val = level ? MT6360_ISNK_ENMASK(led->led_no) : 0;
int ret;
mutex_lock(&priv->lock);
ret = regmap_update_bits(priv->regmap, MT6360_REG_ISNK(led->led_no),
MT6360_ISNK_MASK, level);
if (ret)
goto out;
ret = regmap_update_bits(priv->regmap, MT6360_REG_RGBEN, enable_mask,
val);
out:
mutex_unlock(&priv->lock);
return ret;
}
static int mt6360_torch_brightness_set(struct led_classdev *lcdev,
enum led_brightness level)
{
struct mt6360_led *led =
container_of(lcdev, struct mt6360_led, flash.led_cdev);
struct mt6360_priv *priv = led->priv;
u32 enable_mask = MT6360_TORCHEN_MASK | MT6360_FLCSEN_MASK(led->led_no);
u32 val = level ? MT6360_FLCSEN_MASK(led->led_no) : 0;
u32 prev = priv->fled_torch_used, curr;
int ret;
mutex_lock(&priv->lock);
/*
* Only one set of flash control logic, use the flag to avoid strobe is
* currently used.
*/
if (priv->fled_strobe_used) {
dev_warn(lcdev->dev, "Please disable strobe first [%d]\n",
priv->fled_strobe_used);
ret = -EBUSY;
goto unlock;
}
if (level)
curr = prev | BIT(led->led_no);
else
curr = prev & ~BIT(led->led_no);
if (curr)
val |= MT6360_TORCHEN_MASK;
if (level) {
ret = regmap_update_bits(priv->regmap,
MT6360_REG_FLEDITOR(led->led_no),
MT6360_ITORCH_MASK, level - 1);
if (ret)
goto unlock;
}
ret = regmap_update_bits(priv->regmap, MT6360_REG_FLEDEN, enable_mask,
val);
if (ret)
goto unlock;
priv->fled_torch_used = curr;
unlock:
mutex_unlock(&priv->lock);
return ret;
}
static int mt6360_flash_brightness_set(struct led_classdev_flash *fl_cdev,
u32 brightness)
{
/*
* Due to the current spike when turning on flash, let brightness to be
* kept by framework.
* This empty function is used to prevent led_classdev_flash register
* ops check failure.
*/
return 0;
}
static int _mt6360_flash_brightness_set(struct led_classdev_flash *fl_cdev,
u32 brightness)
{
struct mt6360_led *led =
container_of(fl_cdev, struct mt6360_led, flash);
struct mt6360_priv *priv = led->priv;
struct led_flash_setting *s = &fl_cdev->brightness;
u32 val = (brightness - s->min) / s->step;
return regmap_update_bits(priv->regmap,
MT6360_REG_FLEDISTRB(led->led_no),
MT6360_ISTROBE_MASK, val);
}
static int mt6360_strobe_set(struct led_classdev_flash *fl_cdev, bool state)
{
struct mt6360_led *led =
container_of(fl_cdev, struct mt6360_led, flash);
struct mt6360_priv *priv = led->priv;
struct led_classdev *lcdev = &fl_cdev->led_cdev;
struct led_flash_setting *s = &fl_cdev->brightness;
u32 enable_mask = MT6360_STROBEN_MASK | MT6360_FLCSEN_MASK(led->led_no);
u32 val = state ? MT6360_FLCSEN_MASK(led->led_no) : 0;
u32 prev = priv->fled_strobe_used, curr;
int ret = 0;
mutex_lock(&priv->lock);
/*
* If the state of the upcoming change is the same as the current LED
* device state, then skip the subsequent code to avoid conflict
* with the flow of turning on LED torch mode in V4L2.
*/
if (state == !!(BIT(led->led_no) & prev)) {
dev_info(lcdev->dev, "No change in strobe state [0x%x]\n", prev);
goto unlock;
}
/*
* Only one set of flash control logic, use the flag to avoid torch is
* currently used
*/
if (priv->fled_torch_used) {
dev_warn(lcdev->dev, "Please disable torch first [0x%x]\n",
priv->fled_torch_used);
ret = -EBUSY;
goto unlock;
}
if (state)
curr = prev | BIT(led->led_no);
else
curr = prev & ~BIT(led->led_no);
if (curr)
val |= MT6360_STROBEN_MASK;
ret = regmap_update_bits(priv->regmap, MT6360_REG_FLEDEN, enable_mask,
val);
if (ret) {
dev_err(lcdev->dev, "[%d] control current source %d fail\n",
led->led_no, state);
goto unlock;
}
/*
* If the flash need to be on, config the flash current ramping up to
* the setting value.
* Else, always recover back to the minimum one
*/
ret = _mt6360_flash_brightness_set(fl_cdev, state ? s->val : s->min);
if (ret)
goto unlock;
/*
* For the flash turn on/off, HW rampping up/down time is 5ms/500us,
* respectively.
*/
if (!prev && curr)
usleep_range(5000, 6000);
else if (prev && !curr)
udelay(500);
priv->fled_strobe_used = curr;
unlock:
mutex_unlock(&priv->lock);
return ret;
}
static int mt6360_strobe_get(struct led_classdev_flash *fl_cdev, bool *state)
{
struct mt6360_led *led =
container_of(fl_cdev, struct mt6360_led, flash);
struct mt6360_priv *priv = led->priv;
mutex_lock(&priv->lock);
*state = !!(priv->fled_strobe_used & BIT(led->led_no));
mutex_unlock(&priv->lock);
return 0;
}
static int mt6360_timeout_set(struct led_classdev_flash *fl_cdev, u32 timeout)
{
struct mt6360_led *led =
container_of(fl_cdev, struct mt6360_led, flash);
struct mt6360_priv *priv = led->priv;
struct led_flash_setting *s = &fl_cdev->timeout;
u32 val = (timeout - s->min) / s->step;
int ret;
mutex_lock(&priv->lock);
ret = regmap_update_bits(priv->regmap, MT6360_REG_STRBTO,
MT6360_STRBTO_MASK, val);
mutex_unlock(&priv->lock);
return ret;
}
static int mt6360_fault_get(struct led_classdev_flash *fl_cdev, u32 *fault)
{
struct mt6360_led *led =
container_of(fl_cdev, struct mt6360_led, flash);
struct mt6360_priv *priv = led->priv;
u16 fled_stat;
unsigned int chg_stat, strobe_timeout_mask, fled_short_mask;
u32 rfault = 0;
int ret;
mutex_lock(&priv->lock);
ret = regmap_read(priv->regmap, MT6360_REG_CHGSTAT2, &chg_stat);
if (ret)
goto unlock;
ret = regmap_raw_read(priv->regmap, MT6360_REG_FLEDSTAT1, &fled_stat,
sizeof(fled_stat));
if (ret)
goto unlock;
if (led->led_no == MT6360_LED_FLASH1) {
strobe_timeout_mask = MT6360_FLED1STRBTO_MASK;
fled_short_mask = MT6360_FLED1SHORT_MASK;
} else {
strobe_timeout_mask = MT6360_FLED2STRBTO_MASK;
fled_short_mask = MT6360_FLED2SHORT_MASK;
}
if (chg_stat & MT6360_FLEDCHGVINOVP_MASK)
rfault |= LED_FAULT_INPUT_VOLTAGE;
if (fled_stat & strobe_timeout_mask)
rfault |= LED_FAULT_TIMEOUT;
if (fled_stat & fled_short_mask)
rfault |= LED_FAULT_SHORT_CIRCUIT;
if (fled_stat & MT6360_FLEDLVF_MASK)
rfault |= LED_FAULT_UNDER_VOLTAGE;
*fault = rfault;
unlock:
mutex_unlock(&priv->lock);
return ret;
}
static const struct led_flash_ops mt6360_flash_ops = {
.flash_brightness_set = mt6360_flash_brightness_set,
.strobe_set = mt6360_strobe_set,
.strobe_get = mt6360_strobe_get,
.timeout_set = mt6360_timeout_set,
.fault_get = mt6360_fault_get,
};
static int mt6360_isnk_init_default_state(struct mt6360_led *led)
{
struct mt6360_priv *priv = led->priv;
unsigned int regval;
u32 level;
int ret;
ret = regmap_read(priv->regmap, MT6360_REG_ISNK(led->led_no), ®val);
if (ret)
return ret;
level = regval & MT6360_ISNK_MASK;
ret = regmap_read(priv->regmap, MT6360_REG_RGBEN, ®val);
if (ret)
return ret;
if (!(regval & MT6360_ISNK_ENMASK(led->led_no)))
level = LED_OFF;
switch (led->default_state) {
case LEDS_DEFSTATE_ON:
led->isnk.brightness = led->isnk.max_brightness;
break;
case LEDS_DEFSTATE_KEEP:
led->isnk.brightness = min(level, led->isnk.max_brightness);
break;
default:
led->isnk.brightness = LED_OFF;
}
return mt6360_isnk_brightness_set(&led->isnk, led->isnk.brightness);
}
static int mt6360_flash_init_default_state(struct mt6360_led *led)
{
struct led_classdev_flash *flash = &led->flash;
struct mt6360_priv *priv = led->priv;
u32 enable_mask = MT6360_TORCHEN_MASK | MT6360_FLCSEN_MASK(led->led_no);
u32 level;
unsigned int regval;
int ret;
ret = regmap_read(priv->regmap, MT6360_REG_FLEDITOR(led->led_no),
®val);
if (ret)
return ret;
level = regval & MT6360_ITORCH_MASK;
ret = regmap_read(priv->regmap, MT6360_REG_FLEDEN, ®val);
if (ret)
return ret;
if ((regval & enable_mask) == enable_mask)
level += 1;
else
level = LED_OFF;
switch (led->default_state) {
case LEDS_DEFSTATE_ON:
flash->led_cdev.brightness = flash->led_cdev.max_brightness;
break;
case LEDS_DEFSTATE_KEEP:
flash->led_cdev.brightness =
min(level, flash->led_cdev.max_brightness);
break;
default:
flash->led_cdev.brightness = LED_OFF;
}
return mt6360_torch_brightness_set(&flash->led_cdev,
flash->led_cdev.brightness);
}
#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
static int mt6360_flash_external_strobe_set(struct v4l2_flash *v4l2_flash,
bool enable)
{
struct led_classdev_flash *flash = v4l2_flash->fled_cdev;
struct mt6360_led *led = container_of(flash, struct mt6360_led, flash);
struct mt6360_priv *priv = led->priv;
u32 mask = MT6360_FLCSEN_MASK(led->led_no);
u32 val = enable ? mask : 0;
int ret;
mutex_lock(&priv->lock);
ret = regmap_update_bits(priv->regmap, MT6360_REG_FLEDEN, mask, val);
if (ret)
goto unlock;
if (enable)
priv->fled_strobe_used |= BIT(led->led_no);
else
priv->fled_strobe_used &= ~BIT(led->led_no);
unlock:
mutex_unlock(&priv->lock);
return ret;
}
static const struct v4l2_flash_ops v4l2_flash_ops = {
.external_strobe_set = mt6360_flash_external_strobe_set,
};
static void mt6360_init_v4l2_flash_config(struct mt6360_led *led,
struct v4l2_flash_config *config)
{
struct led_classdev *lcdev;
struct led_flash_setting *s = &config->intensity;
lcdev = &led->flash.led_cdev;
s->min = MT6360_ITORCH_MINUA;
s->step = MT6360_ITORCH_STEPUA;
s->val = s->max = s->min + (lcdev->max_brightness - 1) * s->step;
config->has_external_strobe = 1;
strscpy(config->dev_name, lcdev->dev->kobj.name,
sizeof(config->dev_name));
config->flash_faults = LED_FAULT_SHORT_CIRCUIT | LED_FAULT_TIMEOUT |
LED_FAULT_INPUT_VOLTAGE |
LED_FAULT_UNDER_VOLTAGE;
}
#else
static const struct v4l2_flash_ops v4l2_flash_ops;
static void mt6360_init_v4l2_flash_config(struct mt6360_led *led,
struct v4l2_flash_config *config)
{
}
#endif
static int mt6360_led_register(struct device *parent, struct mt6360_led *led,
struct led_init_data *init_data)
{
struct mt6360_priv *priv = led->priv;
struct v4l2_flash_config v4l2_config = {0};
int ret;
if ((led->led_no == MT6360_LED_ISNK1 ||
led->led_no == MT6360_VIRTUAL_MULTICOLOR) &&
(priv->leds_active & BIT(MT6360_LED_ISNK1))) {
/*
* Change isink1 to SW control mode, disconnect it with
* charger state
*/
ret = regmap_update_bits(priv->regmap, MT6360_REG_RGBEN,
MT6360_CHRINDSEL_MASK,
MT6360_CHRINDSEL_MASK);
if (ret) {
dev_err(parent, "Failed to config ISNK1 to SW mode\n");
return ret;
}
}
switch (led->led_no) {
case MT6360_VIRTUAL_MULTICOLOR:
ret = mt6360_mc_brightness_set(&led->mc.led_cdev, LED_OFF);
if (ret) {
dev_err(parent,
"Failed to init multicolor brightness\n");
return ret;
}
ret = devm_led_classdev_multicolor_register_ext(parent,
&led->mc, init_data);
if (ret) {
dev_err(parent, "Couldn't register multicolor\n");
return ret;
}
break;
case MT6360_LED_ISNK1 ... MT6360_LED_ISNKML:
ret = mt6360_isnk_init_default_state(led);
if (ret) {
dev_err(parent, "Failed to init %d isnk state\n",
led->led_no);
return ret;
}
ret = devm_led_classdev_register_ext(parent, &led->isnk,
init_data);
if (ret) {
dev_err(parent, "Couldn't register isink %d\n",
led->led_no);
return ret;
}
break;
default:
ret = mt6360_flash_init_default_state(led);
if (ret) {
dev_err(parent, "Failed to init %d flash state\n",
led->led_no);
return ret;
}
ret = devm_led_classdev_flash_register_ext(parent, &led->flash,
init_data);
if (ret) {
dev_err(parent, "Couldn't register flash %d\n",
led->led_no);
return ret;
}
mt6360_init_v4l2_flash_config(led, &v4l2_config);
led->v4l2_flash = v4l2_flash_init(parent, init_data->fwnode,
&led->flash,
&v4l2_flash_ops,
&v4l2_config);
if (IS_ERR(led->v4l2_flash)) {
dev_err(parent, "Failed to register %d v4l2 sd\n",
led->led_no);
return PTR_ERR(led->v4l2_flash);
}
}
return 0;
}
static u32 clamp_align(u32 val, u32 min, u32 max, u32 step)
{
u32 retval;
retval = clamp_val(val, min, max);
if (step > 1)
retval = rounddown(retval - min, step) + min;
return retval;
}
static int mt6360_init_isnk_properties(struct mt6360_led *led,
struct led_init_data *init_data)
{
struct led_classdev *lcdev;
struct mt6360_priv *priv = led->priv;
struct fwnode_handle *child;
u32 step_uA = MT6360_ISNKRGB_STEPUA, max_uA = MT6360_ISNKRGB_MAXUA;
u32 val;
int num_color = 0, ret;
if (led->led_no == MT6360_VIRTUAL_MULTICOLOR) {
struct mc_subled *sub_led;
sub_led = devm_kzalloc(priv->dev,
sizeof(*sub_led) * MULTICOLOR_NUM_CHANNELS, GFP_KERNEL);
if (!sub_led)
return -ENOMEM;
fwnode_for_each_child_node(init_data->fwnode, child) {
u32 reg, color;
ret = fwnode_property_read_u32(child, "reg", ®);
if (ret || reg > MT6360_LED_ISNK3 ||
priv->leds_active & BIT(reg)) {
fwnode_handle_put(child);
return -EINVAL;
}
ret = fwnode_property_read_u32(child, "color", &color);
if (ret) {
dev_err(priv->dev,
"led %d, no color specified\n",
led->led_no);
fwnode_handle_put(child);
return ret;
}
priv->leds_active |= BIT(reg);
sub_led[num_color].color_index = color;
sub_led[num_color].channel = reg;
num_color++;
}
if (num_color < 2) {
dev_err(priv->dev,
"Multicolor must include 2 or more led channel\n");
return -EINVAL;
}
led->mc.num_colors = num_color;
led->mc.subled_info = sub_led;
lcdev = &led->mc.led_cdev;
lcdev->brightness_set_blocking = mt6360_mc_brightness_set;
} else {
if (led->led_no == MT6360_LED_ISNKML) {
step_uA = MT6360_ISNKML_STEPUA;
max_uA = MT6360_ISNKML_MAXUA;
}
lcdev = &led->isnk;
lcdev->brightness_set_blocking = mt6360_isnk_brightness_set;
}
ret = fwnode_property_read_u32(init_data->fwnode, "led-max-microamp",
&val);
if (ret) {
dev_warn(priv->dev,
"Not specified led-max-microamp, config to the minimum\n");
val = step_uA;
} else
val = clamp_align(val, 0, max_uA, step_uA);
lcdev->max_brightness = val / step_uA;
fwnode_property_read_string(init_data->fwnode, "linux,default-trigger",
&lcdev->default_trigger);
return 0;
}
static int mt6360_init_flash_properties(struct mt6360_led *led,
struct led_init_data *init_data)
{
struct led_classdev_flash *flash = &led->flash;
struct led_classdev *lcdev = &flash->led_cdev;
struct mt6360_priv *priv = led->priv;
struct led_flash_setting *s;
u32 val;
int ret;
ret = fwnode_property_read_u32(init_data->fwnode, "led-max-microamp",
&val);
if (ret) {
dev_warn(priv->dev,
"Not specified led-max-microamp, config to the minimum\n");
val = MT6360_ITORCH_MINUA;
} else
val = clamp_align(val, MT6360_ITORCH_MINUA, MT6360_ITORCH_MAXUA,
MT6360_ITORCH_STEPUA);
lcdev->max_brightness =
(val - MT6360_ITORCH_MINUA) / MT6360_ITORCH_STEPUA + 1;
lcdev->brightness_set_blocking = mt6360_torch_brightness_set;
lcdev->flags |= LED_DEV_CAP_FLASH;
ret = fwnode_property_read_u32(init_data->fwnode, "flash-max-microamp",
&val);
if (ret) {
dev_warn(priv->dev,
"Not specified flash-max-microamp, config to the minimum\n");
val = MT6360_ISTRB_MINUA;
} else
val = clamp_align(val, MT6360_ISTRB_MINUA, MT6360_ISTRB_MAXUA,
MT6360_ISTRB_STEPUA);
s = &flash->brightness;
s->min = MT6360_ISTRB_MINUA;
s->step = MT6360_ISTRB_STEPUA;
s->val = s->max = val;
/*
* Always configure as min level when off to prevent flash current
* spike.
*/
ret = _mt6360_flash_brightness_set(flash, s->min);
if (ret)
return ret;
ret = fwnode_property_read_u32(init_data->fwnode,
"flash-max-timeout-us", &val);
if (ret) {
dev_warn(priv->dev,
"Not specified flash-max-timeout-us, config to the minimum\n");
val = MT6360_STRBTO_MINUS;
} else
val = clamp_align(val, MT6360_STRBTO_MINUS, MT6360_STRBTO_MAXUS,
MT6360_STRBTO_STEPUS);
s = &flash->timeout;
s->min = MT6360_STRBTO_MINUS;
s->step = MT6360_STRBTO_STEPUS;
s->val = s->max = val;
flash->ops = &mt6360_flash_ops;
return 0;
}
static void mt6360_v4l2_flash_release(struct mt6360_priv *priv)
{
int i;
for (i = 0; i < priv->leds_count; i++) {
struct mt6360_led *led = priv->leds + i;
if (led->v4l2_flash)
v4l2_flash_release(led->v4l2_flash);
}
}
static int mt6360_led_probe(struct platform_device *pdev)
{
struct mt6360_priv *priv;
struct fwnode_handle *child;
size_t count;
int i = 0, ret;
count = device_get_child_node_count(&pdev->dev);
if (!count || count > MT6360_MAX_LEDS) {
dev_err(&pdev->dev,
"No child node or node count over max led number %zu\n",
count);
return -EINVAL;
}
priv = devm_kzalloc(&pdev->dev,
struct_size(priv, leds, count), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->leds_count = count;
priv->dev = &pdev->dev;
mutex_init(&priv->lock);
priv->regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!priv->regmap) {
dev_err(&pdev->dev, "Failed to get parent regmap\n");
return -ENODEV;
}
device_for_each_child_node(&pdev->dev, child) {
struct mt6360_led *led = priv->leds + i;
struct led_init_data init_data = { .fwnode = child, };
u32 reg, led_color;
ret = fwnode_property_read_u32(child, "color", &led_color);
if (ret)
goto out_flash_release;
if (led_color == LED_COLOR_ID_RGB ||
led_color == LED_COLOR_ID_MULTI)
reg = MT6360_VIRTUAL_MULTICOLOR;
else {
ret = fwnode_property_read_u32(child, "reg", ®);
if (ret)
goto out_flash_release;
if (reg >= MT6360_MAX_LEDS) {
ret = -EINVAL;
goto out_flash_release;
}
}
if (priv->leds_active & BIT(reg)) {
ret = -EINVAL;
goto out_flash_release;
}
priv->leds_active |= BIT(reg);
led->led_no = reg;
led->priv = priv;
led->default_state = led_init_default_state_get(child);
if (reg == MT6360_VIRTUAL_MULTICOLOR ||
reg <= MT6360_LED_ISNKML)
ret = mt6360_init_isnk_properties(led, &init_data);
else
ret = mt6360_init_flash_properties(led, &init_data);
if (ret)
goto out_flash_release;
ret = mt6360_led_register(&pdev->dev, led, &init_data);
if (ret)
goto out_flash_release;
i++;
}
platform_set_drvdata(pdev, priv);
return 0;
out_flash_release:
mt6360_v4l2_flash_release(priv);
return ret;
}
static void mt6360_led_remove(struct platform_device *pdev)
{
struct mt6360_priv *priv = platform_get_drvdata(pdev);
mt6360_v4l2_flash_release(priv);
}
static const struct of_device_id __maybe_unused mt6360_led_of_id[] = {
{ .compatible = "mediatek,mt6360-led", },
{}
};
MODULE_DEVICE_TABLE(of, mt6360_led_of_id);
static struct platform_driver mt6360_led_driver = {
.driver = {
.name = "mt6360-led",
.of_match_table = mt6360_led_of_id,
},
.probe = mt6360_led_probe,
.remove_new = mt6360_led_remove,
};
module_platform_driver(mt6360_led_driver);
MODULE_AUTHOR("Gene Chen <[email protected]>");
MODULE_DESCRIPTION("MT6360 LED Driver");
MODULE_LICENSE("GPL v2");
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