int32_t qpnp_iadc_read(enum qpnp_iadc_channels channel,
struct qpnp_iadc_result *result)
{
struct qpnp_iadc_drv *iadc = qpnp_iadc;
int32_t rc, rsense_n_ohms, sign = 0, num, mode_sel = 0;
int32_t rsense_u_ohms = 0;
int64_t result_current;
uint16_t raw_data;
if (!iadc || !iadc->iadc_initialized)
return -EPROBE_DEFER;
if (!iadc->iadc_mode_sel) {
rc = qpnp_check_pmic_temp();
if (rc) {
pr_err("Error checking pmic therm temp\n");
return rc;
}
}
mutex_lock(&iadc->adc->adc_lock);
rc = qpnp_iadc_configure(channel, &raw_data, mode_sel);
if (rc < 0) {
pr_err("qpnp adc result read failed with %d\n", rc);
goto fail;
}
rc = qpnp_iadc_get_rsense(&rsense_n_ohms);
pr_debug("current raw:0%x and rsense:%d\n",
raw_data, rsense_n_ohms);
rsense_u_ohms = rsense_n_ohms/1000;
num = raw_data - iadc->adc->calib.offset_raw;
if (num < 0) {
sign = 1;
num = -num;
}
result->result_uv = (num * QPNP_ADC_GAIN_NV)/
(iadc->adc->calib.gain_raw - iadc->adc->calib.offset_raw);
result_current = result->result_uv;
result_current *= QPNP_IADC_NANO_VOLTS_FACTOR;
do_div(result_current, rsense_u_ohms);
if (sign) {
result->result_uv = -result->result_uv;
result_current = -result_current;
}
result->result_ua = (int32_t) result_current;
fail:
mutex_unlock(&iadc->adc->adc_lock);
return rc;
}
int32_t qpnp_iadc_vadc_sync_read(struct qpnp_iadc_chip *iadc,
enum qpnp_iadc_channels i_channel, struct qpnp_iadc_result *i_result,
enum qpnp_vadc_channels v_channel, struct qpnp_vadc_result *v_result)
{
int rc = 0, mode_sel = 0, num = 0, rsense_n_ohms = 0, sign = 0;
int dt_index = 0;
uint16_t raw_data;
int32_t rsense_u_ohms = 0;
int64_t result_current;
if (qpnp_iadc_is_valid(iadc) < 0)
return -EPROBE_DEFER;
if ((iadc->adc->calib.gain_raw - iadc->adc->calib.offset_raw) == 0) {
pr_err("raw offset errors! run iadc calibration again\n");
return -EINVAL;
}
mutex_lock(&iadc->adc->adc_lock);
if (iadc->iadc_poll_eoc) {
pr_debug("acquiring iadc eoc wakelock\n");
pm_stay_awake(iadc->dev);
}
iadc->iadc_mode_sel = true;
rc = qpnp_vadc_iadc_sync_request(iadc->vadc_dev, v_channel);
if (rc) {
pr_err("Configuring VADC failed\n");
goto fail;
}
while (((enum qpnp_iadc_channels)
iadc->adc->adc_channels[dt_index].channel_num
!= i_channel) && (dt_index < iadc->max_channels_available))
dt_index++;
if (dt_index >= iadc->max_channels_available) {
pr_err("not a valid IADC channel\n");
rc = -EINVAL;
goto fail;
}
iadc->adc->amux_prop->decimation =
iadc->adc->adc_channels[dt_index].adc_decimation;
iadc->adc->amux_prop->fast_avg_setup =
iadc->adc->adc_channels[dt_index].fast_avg_setup;
rc = qpnp_iadc_configure(iadc, i_channel, &raw_data, mode_sel);
if (rc < 0) {
pr_err("qpnp adc result read failed with %d\n", rc);
goto fail_release_vadc;
}
rc = qpnp_iadc_get_rsense(iadc, &rsense_n_ohms);
pr_debug("current raw:0%x and rsense:%d\n",
raw_data, rsense_n_ohms);
rsense_u_ohms = rsense_n_ohms/1000;
num = raw_data - iadc->adc->calib.offset_raw;
if (num < 0) {
sign = 1;
num = -num;
}
i_result->result_uv = (num * QPNP_ADC_GAIN_NV)/
(iadc->adc->calib.gain_raw - iadc->adc->calib.offset_raw);
result_current = i_result->result_uv;
result_current *= QPNP_IADC_NANO_VOLTS_FACTOR;
/* Intentional fall through. Process the result w/o comp */
if (!rsense_u_ohms) {
pr_err("rsense error=%d\n", rsense_u_ohms);
goto fail_release_vadc;
}
do_div(result_current, rsense_u_ohms);
if (sign) {
i_result->result_uv = -i_result->result_uv;
result_current = -result_current;
}
result_current *= -1;
rc = qpnp_iadc_comp_result(iadc, &result_current);
if (rc < 0)
pr_err("Error during compensating the IADC\n");
rc = 0;
result_current *= -1;
i_result->result_ua = (int32_t) result_current;
fail_release_vadc:
rc = qpnp_vadc_iadc_sync_complete_request(iadc->vadc_dev, v_channel,
v_result);
if (rc)
pr_err("Releasing VADC failed\n");
fail:
iadc->iadc_mode_sel = false;
if (iadc->iadc_poll_eoc) {
pr_debug("releasing iadc eoc wakelock\n");
pm_relax(iadc->dev);
}
mutex_unlock(&iadc->adc->adc_lock);
return rc;
}
int32_t qpnp_iadc_vadc_sync_read(struct qpnp_iadc_chip *iadc,
enum qpnp_iadc_channels i_channel, struct qpnp_iadc_result *i_result,
enum qpnp_vadc_channels v_channel, struct qpnp_vadc_result *v_result)
{
int rc = 0, mode_sel = 0, num = 0, rsense_n_ohms = 0, sign = 0;
uint16_t raw_data;
int32_t rsense_u_ohms = 0;
int64_t result_current;
if (qpnp_iadc_is_valid(iadc) < 0)
return -EPROBE_DEFER;
mutex_lock(&iadc->adc->adc_lock);
if (iadc->iadc_poll_eoc) {
pr_debug("acquiring iadc eoc wakelock\n");
pm_stay_awake(iadc->dev);
}
iadc->iadc_mode_sel = true;
rc = qpnp_vadc_iadc_sync_request(iadc->vadc_dev, v_channel);
if (rc) {
pr_err("Configuring VADC failed\n");
goto fail;
}
rc = qpnp_iadc_configure(iadc, i_channel, &raw_data, mode_sel);
if (rc < 0) {
pr_err("qpnp adc result read failed with %d\n", rc);
goto fail_release_vadc;
}
rc = qpnp_iadc_get_rsense(iadc, &rsense_n_ohms);
pr_debug("current raw:0%x and rsense:%d\n",
raw_data, rsense_n_ohms);
rsense_u_ohms = rsense_n_ohms/1000;
num = raw_data - iadc->adc->calib.offset_raw;
if (num < 0) {
sign = 1;
num = -num;
}
i_result->result_uv = (num * QPNP_ADC_GAIN_NV)/
(iadc->adc->calib.gain_raw - iadc->adc->calib.offset_raw);
result_current = i_result->result_uv;
result_current *= QPNP_IADC_NANO_VOLTS_FACTOR;
/* Intentional fall through. Process the result w/o comp */
do_div(result_current, rsense_u_ohms);
if (sign) {
i_result->result_uv = -i_result->result_uv;
result_current = -result_current;
}
result_current *= -1;
rc = qpnp_iadc_comp_result(iadc, &result_current);
if (rc < 0)
pr_err("Error during compensating the IADC\n");
rc = 0;
result_current *= -1;
i_result->result_ua = (int32_t) result_current;
fail_release_vadc:
rc = qpnp_vadc_iadc_sync_complete_request(iadc->vadc_dev, v_channel,
v_result);
if (rc)
pr_err("Releasing VADC failed\n");
fail:
iadc->iadc_mode_sel = false;
if (iadc->iadc_poll_eoc) {
pr_debug("releasing iadc eoc wakelock\n");
pm_relax(iadc->dev);
}
mutex_unlock(&iadc->adc->adc_lock);
return rc;
}
int32_t qpnp_iadc_read(struct qpnp_iadc_chip *iadc,
enum qpnp_iadc_channels channel,
struct qpnp_iadc_result *result)
{
int32_t rc, rsense_n_ohms, sign = 0, num, mode_sel = 0;
int32_t rsense_u_ohms = 0;
int64_t result_current;
uint16_t raw_data;
if (qpnp_iadc_is_valid(iadc) < 0)
return -EPROBE_DEFER;
if ((iadc->adc->calib.gain_raw - iadc->adc->calib.offset_raw) == 0) {
pr_err("raw offset errors! run iadc calibration again\n");
return -EINVAL;
}
rc = qpnp_check_pmic_temp(iadc);
if (rc) {
pr_err("Error checking pmic therm temp\n");
return rc;
}
mutex_lock(&iadc->adc->adc_lock);
if (iadc->iadc_poll_eoc) {
pr_debug("acquiring iadc eoc wakelock\n");
pm_stay_awake(iadc->dev);
}
rc = qpnp_iadc_configure(iadc, channel, &raw_data, mode_sel);
if (rc < 0) {
pr_err("qpnp adc result read failed with %d\n", rc);
goto fail;
}
rc = qpnp_iadc_get_rsense(iadc, &rsense_n_ohms);
pr_debug("current raw:0%x and rsense:%d\n",
raw_data, rsense_n_ohms);
rsense_u_ohms = rsense_n_ohms/1000;
num = raw_data - iadc->adc->calib.offset_raw;
if (num < 0) {
sign = 1;
num = -num;
}
result->result_uv = (num * QPNP_ADC_GAIN_NV)/
(iadc->adc->calib.gain_raw - iadc->adc->calib.offset_raw);
result_current = result->result_uv;
result_current *= QPNP_IADC_NANO_VOLTS_FACTOR;
/* Intentional fall through. Process the result w/o comp */
do_div(result_current, rsense_u_ohms);
if (sign) {
result->result_uv = -result->result_uv;
result_current = -result_current;
}
result_current *= -1;
rc = qpnp_iadc_comp_result(iadc, &result_current);
if (rc < 0)
pr_err("Error during compensating the IADC\n");
rc = 0;
result_current *= -1;
result->result_ua = (int32_t) result_current;
fail:
if (iadc->iadc_poll_eoc) {
pr_debug("releasing iadc eoc wakelock\n");
pm_relax(iadc->dev);
}
mutex_unlock(&iadc->adc->adc_lock);
return rc;
}
