evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

iio: adc: rradc: Add RRADC channels

Browse source 
Add support to read charger and skin temp hot and
too hot temperature threshold values programmed
during initialization.

Change-Id: I46dca1f606b5414bf7a032c18c9684ba2e53cf28
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
Signed-off-by: Nicholas Troast <ntroast@codeaurora.org>
This commit is contained in:
Siddartha Mohanadoss 2016-07-28 15:05:09 -07:00 • committed by Nicholas Troast
parent 05da00db9e
commit a139f26af6
1 changed files with 64 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

65
drivers/iio/adc/qcom-rradc.c
View file

@ -184,6 +184,10 @@ enum rradc_channel_id {
RR_ADC_DIE_TEMP,
RR_ADC_CHG_TEMP,
RR_ADC_GPIO,
RR_ADC_CHG_HOT_TEMP,
RR_ADC_CHG_TOO_HOT_TEMP,
RR_ADC_SKIN_HOT_TEMP,
RR_ADC_SKIN_TOO_HOT_TEMP,
RR_ADC_MAX
};
@ -337,6 +341,39 @@ static int rradc_post_process_die_temp(struct rradc_chip *chip,
return 0;
}
static int rradc_post_process_chg_temp_hot(struct rradc_chip *chip,
struct rradc_chan_prop *prop, u16 adc_code,
int *result_millidegc)
{
int64_t temp = 0;
temp = (int64_t) adc_code * 4;
temp = temp * FG_ADC_RR_TEMP_FS_VOLTAGE_NUM;
temp = div64_s64(temp, (FG_ADC_RR_TEMP_FS_VOLTAGE_DEN *
FG_MAX_ADC_READINGS));
temp = FG_ADC_RR_CHG_TEMP_OFFSET - temp;
temp = div64_s64(temp, FG_ADC_RR_CHG_TEMP_SLOPE);
temp = temp + FG_ADC_RR_CHG_TEMP_OFFSET_MILLI_DEGC;
*result_millidegc = temp;
return 0;
}
static int rradc_post_process_skin_temp_hot(struct rradc_chip *chip,
struct rradc_chan_prop *prop, u16 adc_code,
int *result_millidegc)
{
int64_t temp = 0;
temp = (int64_t) adc_code;
temp = div64_s64(temp, 2);
temp = temp - 30;
temp *= FG_ADC_SCALE_MILLI_FACTOR;
*result_millidegc = temp;
return 0;
}
static int rradc_post_process_chg_temp(struct rradc_chip *chip,
struct rradc_chan_prop *prop, u16 adc_code,
int *result_millidegc)
@ -430,6 +467,18 @@ static const struct rradc_channels rradc_chans[] = {
RR_ADC_CHAN_VOLT("gpio", &rradc_post_process_gpio,
FG_ADC_RR_GPIO_LSB, FG_ADC_RR_GPIO_MSB,
FG_ADC_RR_GPIO_STS)
RR_ADC_CHAN_TEMP("chg_temp_hot", &rradc_post_process_chg_temp_hot,
FG_ADC_RR_CHARGER_HOT, FG_ADC_RR_CHARGER_HOT,
FG_ADC_RR_CHARGER_TEMP_STS)
RR_ADC_CHAN_TEMP("chg_temp_too_hot", &rradc_post_process_chg_temp_hot,
FG_ADC_RR_CHARGER_TOO_HOT, FG_ADC_RR_CHARGER_TOO_HOT,
FG_ADC_RR_CHARGER_TEMP_STS)
RR_ADC_CHAN_TEMP("skin_temp_hot", &rradc_post_process_skin_temp_hot,
FG_ADC_RR_SKIN_HOT, FG_ADC_RR_SKIN_HOT,
FG_ADC_RR_AUX_THERM_STS)
RR_ADC_CHAN_TEMP("skin_temp_too_hot", &rradc_post_process_skin_temp_hot,
FG_ADC_RR_SKIN_TOO_HOT, FG_ADC_RR_SKIN_TOO_HOT,
FG_ADC_RR_AUX_THERM_STS)
};
static int rradc_do_conversion(struct rradc_chip *chip,
@ -442,7 +491,11 @@ static int rradc_do_conversion(struct rradc_chip *chip,
mutex_lock(&chip->lock);
if (prop->channel != RR_ADC_BATT_ID) {
if ((prop->channel != RR_ADC_BATT_ID) &&
(prop->channel != RR_ADC_CHG_HOT_TEMP) &&
(prop->channel != RR_ADC_CHG_TOO_HOT_TEMP) &&
(prop->channel != RR_ADC_SKIN_HOT_TEMP) &&
(prop->channel != RR_ADC_SKIN_TOO_HOT_TEMP)) {
/* BATT_ID STS bit does not get set initially */
status = rradc_chans[prop->channel].sts;
rc = rradc_read(chip, status, buf, 1);
@ -463,6 +516,11 @@ static int rradc_do_conversion(struct rradc_chip *chip,
offset = rradc_chans[prop->channel].lsb;
if (prop->channel == RR_ADC_BATT_ID)
bytes_to_read = 6;
else if ((prop->channel == RR_ADC_CHG_HOT_TEMP) ||
(prop->channel == RR_ADC_CHG_TOO_HOT_TEMP) ||
(prop->channel == RR_ADC_SKIN_HOT_TEMP) ||
(prop->channel == RR_ADC_SKIN_TOO_HOT_TEMP))
bytes_to_read = 1;
else
bytes_to_read = 2;
@ -496,6 +554,11 @@ static int rradc_do_conversion(struct rradc_chip *chip,
*data = batt_id_5;
prop->channel_data = FG_ADC_RR_BATT_ID_5_MA;
}
} else if ((prop->channel == RR_ADC_CHG_HOT_TEMP) ||
(prop->channel == RR_ADC_CHG_TOO_HOT_TEMP) ||
(prop->channel == RR_ADC_SKIN_HOT_TEMP) ||
(prop->channel == RR_ADC_SKIN_TOO_HOT_TEMP)) {
*data = buf[0];
} else {
*data = (buf[1] << 8) | buf[0];
}