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leds: pm8xxx: add calculation of blinking period and on/off

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Change-Id: I718f506051ef367db08c7c8413e536cd5da22a95
This commit is contained in:
samin.ryu 2012-08-30 02:01:09 +09:00 committed by Iliyan Malchev
parent 4bcf317b96
commit c9c2c61431
1 changed files with 45 additions and 23 deletions
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68
drivers/leds/leds-pm8xxx.c
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@ -106,7 +106,11 @@
#define PM8XXX_LED_OFFSET(id) ((id) - PM8XXX_ID_LED_0)
#define PM8XXX_LED_PWM_FLAGS (PM_PWM_LUT_LOOP | PM_PWM_LUT_RAMP_UP | PM_PWM_LUT_REVERSE)
#define PM8XXX_LED_PWM_FLAGS (PM_PWM_LUT_LOOP | PM_PWM_LUT_RAMP_UP | PM_PWM_LUT_REVERSE | \
PM_PWM_LUT_PAUSE_LO_EN | PM_PWM_LUT_PAUSE_HI_EN)
#define PM8XXX_LED_PWM_GRPFREQ_MAX 255
#define PM8XXX_LED_PWM_GRPPWM_MAX 255
#define LED_MAP(_version, _kb, _led0, _led1, _led2, _flash_led0, _flash_led1, \
_wled, _rgb_led_red, _rgb_led_green, _rgb_led_blue)\
@ -173,6 +177,10 @@ struct pm8xxx_led_data {
int max_current;
int use_pwm;
int adjust_brightness;
u16 pwm_grppwm;
u16 pwm_grpfreq;
u16 pwm_pause_hi;
u16 pwm_pause_lo;
};
static void led_kp_set(struct pm8xxx_led_data *led, enum led_brightness value)
@ -413,12 +421,33 @@ static int pm8xxx_led_pwm_pattern_update(struct pm8xxx_led_data * led)
int i, rc = 0;
int temp = 0;
int pwm_max = 0;
int total_ms, on_ms;
if (!led->pwm_duty_cycles || !led->pwm_duty_cycles->duty_pcts) {
dev_err(led->cdev.dev, "duty_cycles and duty_pcts is not exist\n");
return -EINVAL;
}
if (led->pwm_grppwm > 0 && led->pwm_grpfreq > 0) {
total_ms = led->pwm_grpfreq * 50;
on_ms = (led->pwm_grppwm * total_ms) >> 8;
if (PM8XXX_LED_PWM_FLAGS & PM_PWM_LUT_REVERSE) {
led->pwm_duty_cycles->duty_ms = on_ms /
(led->pwm_duty_cycles->num_duty_pcts << 1);
led->pwm_pause_hi = on_ms %
(led->pwm_duty_cycles->num_duty_pcts << 1);
} else {
led->pwm_duty_cycles->duty_ms = on_ms /
(led->pwm_duty_cycles->num_duty_pcts);
led->pwm_pause_hi = on_ms %
(led->pwm_duty_cycles->num_duty_pcts);
}
led->pwm_pause_lo = total_ms - on_ms;
dev_dbg(led->cdev.dev, "duty_ms %d, pause_hi %d, pause_lo %d, total_ms %d, on_ms %d\n",
led->pwm_duty_cycles->duty_ms, led->pwm_pause_hi, led->pwm_pause_lo,
total_ms, on_ms);
}
pwm_max = pm8xxx_adjust_brightness(&led->cdev, led->cdev.brightness);
start_idx = led->pwm_duty_cycles->start_idx;
idx_len = led->pwm_duty_cycles->num_duty_pcts;
@ -446,7 +475,7 @@ static int pm8xxx_led_pwm_pattern_update(struct pm8xxx_led_data * led)
rc = pm8xxx_pwm_lut_config(led->pwm_dev, led->pwm_period_us,
led->pwm_duty_cycles->duty_pcts,
led->pwm_duty_cycles->duty_ms,
start_idx, idx_len, 0, 0,
start_idx, idx_len, led->pwm_pause_lo, led->pwm_pause_hi,
PM8XXX_LED_PWM_FLAGS);
return rc;
@ -473,7 +502,6 @@ static int pm8xxx_led_pwm_work(struct pm8xxx_led_data *led)
led->cdev.brightness);
}
} else {
if (level) {
pm8xxx_led_pwm_pattern_update(led);
led_rgb_write(led, SSBI_REG_ADDR_RGB_CNTL1, level);
@ -902,7 +930,7 @@ static ssize_t pm8xxx_led_grppwm_show(struct device *dev,
for (i = 0; i < pdata->num_configs; i++)
{
n += sprintf(&buf[n], "%s period_us is %d\n", leds[i].cdev.name, leds[i].pwm_period_us);
n += sprintf(&buf[n], "%s period_us is %d\n", leds[i].cdev.name, leds[i].pwm_grppwm);
}
return n;
}
@ -923,15 +951,15 @@ static ssize_t pm8xxx_led_grppwm_store(struct device *dev,
if (count == size) {
rc = count;
if(state < PM8XXX_PWM_PERIOD_MIN)
state = PM8XXX_PWM_PERIOD_MIN;
if(state > PM8XXX_PWM_PERIOD_MAX)
state = PM8XXX_PWM_PERIOD_MAX;
if (state < 0)
state = 0;
if (state > PM8XXX_LED_PWM_GRPPWM_MAX)
state = PM8XXX_LED_PWM_GRPPWM_MAX;
for (i = 0; i < pdata->num_configs; i++)
{
leds[i].pwm_period_us = state;
leds[i].pwm_grppwm = state;
dev_dbg(leds[i].cdev.dev, "set grppwm %lu\n", state);
}
}
return rc;
@ -948,12 +976,7 @@ static ssize_t pm8xxx_led_grpfreq_show(struct device *dev,
for (i = 0; i < pdata->num_configs; i++)
{
if (leds[i].pwm_duty_cycles != NULL) {
n += sprintf(&buf[n], "%s freq %d\n", leds[i].cdev.name, leds[i].pwm_duty_cycles->duty_ms);
}
else
n += sprintf(&buf[n], "%s's duty cycles is not exist\n", leds[i].cdev.name);
n += sprintf(&buf[n], "%s freq %d\n", leds[i].cdev.name, leds[i].pwm_grpfreq);
}
return n;
}
@ -975,16 +998,15 @@ static ssize_t pm8xxx_led_grpfreq_store(struct device *dev,
if (count == size) {
rc = count;
if(state == 0)
state = 32;
if(state > PM_PWM_LUT_DUTY_TIME_MAX)
state = PM_PWM_LUT_DUTY_TIME_MAX;
if(state < 0)
state = 0;
if(state > PM8XXX_LED_PWM_GRPFREQ_MAX)
state = PM8XXX_LED_PWM_GRPFREQ_MAX;
for (i = 0; i < pdata->num_configs; i++)
{
if (leds[i].pwm_duty_cycles != NULL) {
leds[i].pwm_duty_cycles->duty_ms = state;
}
leds[i].pwm_grpfreq = state;
dev_dbg(leds[i].cdev.dev, "set grpfreq %lu\n", state);
}
}
return rc;