mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-08-27 11:19:37 +00:00
Code Issues Releases Wiki Activity

leds: is31fl319x: Add support for is31fl319{0,1,3} chips

Browse source 
Set specific chipset structs values for is31fl319{0,1,3}
so that those chips can actually work.
Datasheets:
https://lumissil.com/assets/pdf/core/IS31FL3190_DS.pdf
https://lumissil.com/assets/pdf/core/IS31FL3191_DS.pdf
https://lumissil.com/assets/pdf/core/IS31FL3193_DS.pdf
https://lumissil.com/assets/pdf/core/IS31FL3196_DS.pdf
https://lumissil.com/assets/pdf/core/IS31FL3199_DS.pdf

Signed-off-by: Vincent Knecht <vincent.knecht@mailoo.org>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
This commit is contained in:
Vincent Knecht 2022-07-12 12:08:32 +02:00 committed by Pavel Machek
parent bd34266fde
commit fa877cf1ab
1 changed files with 147 additions and 14 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

161
drivers/leds/leds-is31fl319x.c
View file

@ -21,6 +21,31 @@
/* register numbers */
#define IS31FL319X_SHUTDOWN 0x00
/* registers for 3190, 3191 and 3193 */
#define IS31FL3190_BREATHING 0x01
#define IS31FL3190_LEDMODE 0x02
#define IS31FL3190_CURRENT 0x03
#define IS31FL3190_PWM(channel) (0x04 + channel)
#define IS31FL3190_DATA_UPDATE 0x07
#define IS31FL3190_T0(channel) (0x0a + channel)
#define IS31FL3190_T1T2(channel) (0x10 + channel)
#define IS31FL3190_T3T4(channel) (0x16 + channel)
#define IS31FL3190_TIME_UPDATE 0x1c
#define IS31FL3190_LEDCONTROL 0x1d
#define IS31FL3190_RESET 0x2f
#define IS31FL3190_CURRENT_uA_MIN 5000
#define IS31FL3190_CURRENT_uA_DEFAULT 42000
#define IS31FL3190_CURRENT_uA_MAX 42000
#define IS31FL3190_CURRENT_MASK GENMASK(4, 2)
#define IS31FL3190_CURRENT_5_mA 0x02
#define IS31FL3190_CURRENT_10_mA 0x01
#define IS31FL3190_CURRENT_17dot5_mA 0x04
#define IS31FL3190_CURRENT_30_mA 0x03
#define IS31FL3190_CURRENT_42_mA 0x00
/* registers for 3196 and 3199 */
#define IS31FL3196_CTRL1 0x01
#define IS31FL3196_CTRL2 0x02
#define IS31FL3196_CONFIG1 0x03
@ -93,6 +118,38 @@ static bool is31fl319x_readable_reg(struct device *dev, unsigned int reg)
return false;
}
static bool is31fl3190_volatile_reg(struct device *dev, unsigned int reg)
{
/* volatile registers are not cached */
switch (reg) {
case IS31FL3190_DATA_UPDATE:
case IS31FL3190_TIME_UPDATE:
case IS31FL3190_RESET:
return true; /* always write-through */
default:
return false;
}
}
static const struct reg_default is31fl3190_reg_defaults[] = {
{ IS31FL3190_LEDMODE, 0x00 },
{ IS31FL3190_CURRENT, 0x00 },
{ IS31FL3190_PWM(0), 0x00 },
{ IS31FL3190_PWM(1), 0x00 },
{ IS31FL3190_PWM(2), 0x00 },
};
static struct regmap_config is31fl3190_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = IS31FL3190_RESET,
.cache_type = REGCACHE_FLAT,
.readable_reg = is31fl319x_readable_reg,
.volatile_reg = is31fl3190_volatile_reg,
.reg_defaults = is31fl3190_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(is31fl3190_reg_defaults),
};
static bool is31fl3196_volatile_reg(struct device *dev, unsigned int reg)
{
/* volatile registers are not cached */
@ -131,6 +188,60 @@ static struct regmap_config is31fl3196_regmap_config = {
.num_reg_defaults = ARRAY_SIZE(is31fl3196_reg_defaults),
};
static int is31fl3190_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
struct is31fl319x_led *led = container_of(cdev, struct is31fl319x_led, cdev);
struct is31fl319x_chip *is31 = led->chip;
int chan = led - is31->leds;
int ret;
int i;
u8 ctrl = 0;
dev_dbg(&is31->client->dev, "%s %d: %d\n", __func__, chan, brightness);
mutex_lock(&is31->lock);
/* update PWM register */
ret = regmap_write(is31->regmap, IS31FL3190_PWM(chan), brightness);
if (ret < 0)
goto out;
/* read current brightness of all PWM channels */
for (i = 0; i < is31->cdef->num_leds; i++) {
unsigned int pwm_value;
bool on;
/*
* since neither cdev nor the chip can provide
* the current setting, we read from the regmap cache
*/
ret = regmap_read(is31->regmap, IS31FL3190_PWM(i), &pwm_value);
on = ret >= 0 && pwm_value > LED_OFF;
ctrl |= on << i;
}
if (ctrl > 0) {
dev_dbg(&is31->client->dev, "power up %02x\n", ctrl);
regmap_write(is31->regmap, IS31FL3190_LEDCONTROL, ctrl);
/* update PWMs */
regmap_write(is31->regmap, IS31FL3190_DATA_UPDATE, 0x00);
/* enable chip from shut down and enable all channels */
ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x20);
} else {
dev_dbg(&is31->client->dev, "power down\n");
/* shut down (no need to clear LEDCONTROL) */
ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x01);
}
out:
mutex_unlock(&is31->lock);
return ret;
}
static int is31fl3196_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
@ -197,24 +308,24 @@ static int is31fl3196_brightness_set(struct led_classdev *cdev,
static const struct is31fl319x_chipdef is31fl3190_cdef = {
.num_leds = 1,
.reset_reg = IS31FL3196_RESET,
.is31fl319x_regmap_config = &is31fl3196_regmap_config,
.brightness_set = is31fl3196_brightness_set,
.current_default = IS31FL3196_CURRENT_uA_DEFAULT,
.current_min = IS31FL3196_CURRENT_uA_MIN,
.current_max = IS31FL3196_CURRENT_uA_MAX,
.is_3196or3199 = true,
.reset_reg = IS31FL3190_RESET,
.is31fl319x_regmap_config = &is31fl3190_regmap_config,
.brightness_set = is31fl3190_brightness_set,
.current_default = IS31FL3190_CURRENT_uA_DEFAULT,
.current_min = IS31FL3190_CURRENT_uA_MIN,
.current_max = IS31FL3190_CURRENT_uA_MAX,
.is_3196or3199 = false,
};
static const struct is31fl319x_chipdef is31fl3193_cdef = {
.num_leds = 3,
.reset_reg = IS31FL3196_RESET,
.is31fl319x_regmap_config = &is31fl3196_regmap_config,
.brightness_set = is31fl3196_brightness_set,
.current_default = IS31FL3196_CURRENT_uA_DEFAULT,
.current_min = IS31FL3196_CURRENT_uA_MIN,
.current_max = IS31FL3196_CURRENT_uA_MAX,
.is_3196or3199 = true,
.reset_reg = IS31FL3190_RESET,
.is31fl319x_regmap_config = &is31fl3190_regmap_config,
.brightness_set = is31fl3190_brightness_set,
.current_default = IS31FL3190_CURRENT_uA_DEFAULT,
.current_min = IS31FL3190_CURRENT_uA_MIN,
.current_max = IS31FL3190_CURRENT_uA_MAX,
.is_3196or3199 = false,
};
static const struct is31fl319x_chipdef is31fl3196_cdef = {
@ -362,6 +473,25 @@ static int is31fl319x_parse_dt(struct device *dev,
return ret;
}
static inline int is31fl3190_microamp_to_cs(struct device *dev, u32 microamp)
{
switch (microamp) {
case 5000:
return IS31FL3190_CURRENT_5_mA;
case 10000:
return IS31FL3190_CURRENT_10_mA;
case 17500:
return IS31FL3190_CURRENT_17dot5_mA;
case 30000:
return IS31FL3190_CURRENT_30_mA;
case 42000:
return IS31FL3190_CURRENT_42_mA;
default:
dev_warn(dev, "Unsupported current value: %d, using 5000 µA!\n", microamp);
return IS31FL3190_CURRENT_5_mA;
}
}
static inline int is31fl3196_microamp_to_cs(struct device *dev, u32 microamp)
{ /* round down to nearest supported value (range check done by caller) */
u32 step = microamp / IS31FL3196_CURRENT_uA_STEP;
@ -438,6 +568,9 @@ static int is31fl319x_probe(struct i2c_client *client,
regmap_write(is31->regmap, IS31FL3196_CONFIG2,
is31fl3196_microamp_to_cs(dev, aggregated_led_microamp) |
is31fl3196_db_to_gain(is31->audio_gain_db));
else
regmap_update_bits(is31->regmap, IS31FL3190_CURRENT, IS31FL3190_CURRENT_MASK,
is31fl3190_microamp_to_cs(dev, aggregated_led_microamp));
for (i = 0; i < is31->cdef->num_leds; i++) {
struct is31fl319x_led *led = &is31->leds[i];