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leds: pm8xxx: change calculation of blinking period and on/off timing

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Change-Id: I6adae65ae692c0a3d79bc45356ba8f880b3d00f3
Signed-off-by: Iliyan Malchev <malchev@google.com>
This commit is contained in:
Devin Kim
2012-09-04 16:30:19 -07:00
committed by Iliyan Malchev
parent 3ab2918640
commit dbe6237c19
1 changed files with 20 additions and 29 deletions
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49
drivers/leds/leds-pm8xxx.c
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@@ -106,7 +106,7 @@
#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_PAUSE_LO_EN | PM_PWM_LUT_PAUSE_HI_EN)
#define PM8XXX_LED_PWM_GRPFREQ_MAX 255
@@ -434,15 +434,15 @@ static int pm8xxx_led_pwm_pattern_update(struct pm8xxx_led_data * led)
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_pause_lo = 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_pause_lo = on_ms %
(led->pwm_duty_cycles->num_duty_pcts);
}
led->pwm_pause_lo = total_ms - on_ms;
led->pwm_pause_hi = 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);
@@ -453,13 +453,16 @@ static int pm8xxx_led_pwm_pattern_update(struct pm8xxx_led_data * led)
idx_len = led->pwm_duty_cycles->num_duty_pcts;
pcts = led->pwm_duty_cycles->duty_pcts;
for (i = 0; i < idx_len; i++)
{
if (led->blink == 1) {
temp = ((pwm_max * i) << 1) / (idx_len - 1);
pcts[i] = (temp + 1) >> 1;
} else {
pcts[i] = (pwm_max);
if (led->blink) {
int mid = (idx_len - 1) >> 1;
for (i = 0; i <= mid; i++) {
temp = ((pwm_max * i) << 1) / mid + 1;
pcts[i] = temp >> 1;
pcts[idx_len - 1 - i] = temp >> 1;
}
} else {
for (i = 0; i < idx_len; i++) {
pcts[i] = pwm_max;
}
}
@@ -1019,27 +1022,14 @@ static ssize_t pm8xxx_led_blink_show(struct device *dev,
{
const struct pm8xxx_led_platform_data *pdata = dev->platform_data;
struct pm8xxx_led_data *leds = (struct pm8xxx_led_data *)dev_get_drvdata(dev);
int start_idx = 0, idx_len = 0;
int i, j, n = 0;
int i, blink = 0;
for (i = 0; i < pdata->num_configs; i++)
{
n += sprintf(&buf[n], "[%d] %s pwm pattern %d\n", i, leds[i].cdev.name, leds[i].blink);
if (leds[i].pwm_duty_cycles != NULL && leds[i].pwm_duty_cycles->duty_pcts != NULL) {
start_idx = leds[i].pwm_duty_cycles->start_idx;
idx_len = leds[i].pwm_duty_cycles->num_duty_pcts;
for (j = 0; j < idx_len; j++)
{
n += sprintf(&buf[n], "%d ",
leds[i].pwm_duty_cycles->duty_pcts[j]);
}
n += sprintf(&buf[n], "\n");
}
else
n += sprintf(&buf[n], "not exist\n");
if (leds[i].blink)
blink |= 1 << i;
}
return n;
return sprintf(buf, "%d", blink);
}
static ssize_t pm8xxx_led_blink_store(struct device *dev,
@@ -1063,7 +1053,8 @@ static ssize_t pm8xxx_led_blink_store(struct device *dev,
{
if (leds[i].blink != state) {
leds[i].blink = state;
rc = pm8xxx_led_pwm_pattern_update(&leds[i]);
if(!leds[i].lock_update)
rc = pm8xxx_led_pwm_pattern_update(&leds[i]);
}
}
}