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path: root/drivers/thermal/ti-soc-thermal/ti-bandgap.c
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-rw-r--r--drivers/thermal/ti-soc-thermal/ti-bandgap.c370
1 files changed, 0 insertions, 370 deletions
diff --git a/drivers/thermal/ti-soc-thermal/ti-bandgap.c b/drivers/thermal/ti-soc-thermal/ti-bandgap.c
index 696ab3046b87..097328d8e943 100644
--- a/drivers/thermal/ti-soc-thermal/ti-bandgap.c
+++ b/drivers/thermal/ti-soc-thermal/ti-bandgap.c
@@ -306,217 +306,6 @@ int ti_bandgap_adc_to_mcelsius(struct ti_bandgap *bgp, int adc_val, int *t)
}
/**
- * ti_bandgap_mcelsius_to_adc() - converts a mCelsius value to ADC scale
- * @bgp: struct ti_bandgap pointer
- * @temp: value in mCelsius
- * @adc: address where to write the resulting temperature in ADC representation
- *
- * Simple conversion from mCelsius to ADC values. In case the temp value
- * is out of the ADC conv table range, it returns -ERANGE, 0 on success.
- * The conversion table is indexed by the ADC values.
- *
- * Return: 0 if conversion was successful, else -ERANGE in case the @temp
- * argument is out of the ADC conv table range.
- */
-static
-int ti_bandgap_mcelsius_to_adc(struct ti_bandgap *bgp, long temp, int *adc)
-{
- const struct ti_bandgap_data *conf = bgp->conf;
- const int *conv_table = bgp->conf->conv_table;
- int high, low, mid;
-
- low = 0;
- high = conf->adc_end_val - conf->adc_start_val;
- mid = (high + low) / 2;
-
- if (temp < conv_table[low] || temp > conv_table[high])
- return -ERANGE;
-
- while (low < high) {
- if (temp < conv_table[mid])
- high = mid - 1;
- else
- low = mid + 1;
- mid = (low + high) / 2;
- }
-
- *adc = conf->adc_start_val + low;
- return 0;
-}
-
-/**
- * ti_bandgap_add_hyst() - add hysteresis (in mCelsius) to an ADC value
- * @bgp: struct ti_bandgap pointer
- * @adc_val: temperature value in ADC representation
- * @hyst_val: hysteresis value in mCelsius
- * @sum: address where to write the resulting temperature (in ADC scale)
- *
- * Adds an hysteresis value (in mCelsius) to a ADC temperature value.
- *
- * Return: 0 on success, -ERANGE otherwise.
- */
-static
-int ti_bandgap_add_hyst(struct ti_bandgap *bgp, int adc_val, int hyst_val,
- u32 *sum)
-{
- int temp, ret;
-
- /*
- * Need to add in the mcelsius domain, so we have a temperature
- * the conv_table range
- */
- ret = ti_bandgap_adc_to_mcelsius(bgp, adc_val, &temp);
- if (ret < 0)
- return ret;
-
- temp += hyst_val;
-
- ret = ti_bandgap_mcelsius_to_adc(bgp, temp, sum);
- return ret;
-}
-
-/*** Helper functions handling device Alert/Shutdown signals ***/
-
-/**
- * ti_bandgap_unmask_interrupts() - unmasks the events of thot & tcold
- * @bgp: struct ti_bandgap pointer
- * @id: bandgap sensor id
- * @t_hot: hot temperature value to trigger alert signal
- * @t_cold: cold temperature value to trigger alert signal
- *
- * Checks the requested t_hot and t_cold values and configures the IRQ event
- * masks accordingly. Call this function only if bandgap features HAS(TALERT).
- */
-static void ti_bandgap_unmask_interrupts(struct ti_bandgap *bgp, int id,
- u32 t_hot, u32 t_cold)
-{
- struct temp_sensor_registers *tsr;
- u32 temp, reg_val;
-
- /* Read the current on die temperature */
- temp = ti_bandgap_read_temp(bgp, id);
-
- tsr = bgp->conf->sensors[id].registers;
- reg_val = ti_bandgap_readl(bgp, tsr->bgap_mask_ctrl);
-
- if (temp < t_hot)
- reg_val |= tsr->mask_hot_mask;
- else
- reg_val &= ~tsr->mask_hot_mask;
-
- if (t_cold < temp)
- reg_val |= tsr->mask_cold_mask;
- else
- reg_val &= ~tsr->mask_cold_mask;
- ti_bandgap_writel(bgp, reg_val, tsr->bgap_mask_ctrl);
-}
-
-/**
- * ti_bandgap_update_alert_threshold() - sequence to update thresholds
- * @bgp: struct ti_bandgap pointer
- * @id: bandgap sensor id
- * @val: value (ADC) of a new threshold
- * @hot: desired threshold to be updated. true if threshold hot, false if
- * threshold cold
- *
- * It will program the required thresholds (hot and cold) for TALERT signal.
- * This function can be used to update t_hot or t_cold, depending on @hot value.
- * It checks the resulting t_hot and t_cold values, based on the new passed @val
- * and configures the thresholds so that t_hot is always greater than t_cold.
- * Call this function only if bandgap features HAS(TALERT).
- *
- * Return: 0 if no error, else corresponding error
- */
-static int ti_bandgap_update_alert_threshold(struct ti_bandgap *bgp, int id,
- int val, bool hot)
-{
- struct temp_sensor_data *ts_data = bgp->conf->sensors[id].ts_data;
- struct temp_sensor_registers *tsr;
- u32 thresh_val, reg_val, t_hot, t_cold, ctrl;
- int err = 0;
-
- tsr = bgp->conf->sensors[id].registers;
-
- /* obtain the current value */
- thresh_val = ti_bandgap_readl(bgp, tsr->bgap_threshold);
- t_cold = (thresh_val & tsr->threshold_tcold_mask) >>
- __ffs(tsr->threshold_tcold_mask);
- t_hot = (thresh_val & tsr->threshold_thot_mask) >>
- __ffs(tsr->threshold_thot_mask);
- if (hot)
- t_hot = val;
- else
- t_cold = val;
-
- if (t_cold > t_hot) {
- if (hot)
- err = ti_bandgap_add_hyst(bgp, t_hot,
- -ts_data->hyst_val,
- &t_cold);
- else
- err = ti_bandgap_add_hyst(bgp, t_cold,
- ts_data->hyst_val,
- &t_hot);
- }
-
- /* write the new threshold values */
- reg_val = thresh_val &
- ~(tsr->threshold_thot_mask | tsr->threshold_tcold_mask);
- reg_val |= (t_hot << __ffs(tsr->threshold_thot_mask)) |
- (t_cold << __ffs(tsr->threshold_tcold_mask));
-
- /**
- * Errata i813:
- * Spurious Thermal Alert: Talert can happen randomly while the device
- * remains under the temperature limit defined for this event to trig.
- * This spurious event is caused by a incorrect re-synchronization
- * between clock domains. The comparison between configured threshold
- * and current temperature value can happen while the value is
- * transitioning (metastable), thus causing inappropriate event
- * generation. No spurious event occurs as long as the threshold value
- * stays unchanged. Spurious event can be generated while a thermal
- * alert threshold is modified in
- * CONTROL_BANDGAP_THRESHOLD_MPU/GPU/CORE/DSPEVE/IVA_n.
- */
-
- if (TI_BANDGAP_HAS(bgp, ERRATA_813)) {
- /* Mask t_hot and t_cold events at the IP Level */
- ctrl = ti_bandgap_readl(bgp, tsr->bgap_mask_ctrl);
-
- if (hot)
- ctrl &= ~tsr->mask_hot_mask;
- else
- ctrl &= ~tsr->mask_cold_mask;
-
- ti_bandgap_writel(bgp, ctrl, tsr->bgap_mask_ctrl);
- }
-
- /* Write the threshold value */
- ti_bandgap_writel(bgp, reg_val, tsr->bgap_threshold);
-
- if (TI_BANDGAP_HAS(bgp, ERRATA_813)) {
- /* Unmask t_hot and t_cold events at the IP Level */
- ctrl = ti_bandgap_readl(bgp, tsr->bgap_mask_ctrl);
- if (hot)
- ctrl |= tsr->mask_hot_mask;
- else
- ctrl |= tsr->mask_cold_mask;
-
- ti_bandgap_writel(bgp, ctrl, tsr->bgap_mask_ctrl);
- }
-
- if (err) {
- dev_err(bgp->dev, "failed to reprogram thot threshold\n");
- err = -EIO;
- goto exit;
- }
-
- ti_bandgap_unmask_interrupts(bgp, id, t_hot, t_cold);
-exit:
- return err;
-}
-
-/**
* ti_bandgap_validate() - helper to check the sanity of a struct ti_bandgap
* @bgp: struct ti_bandgap pointer
* @id: bandgap sensor id
@@ -544,165 +333,6 @@ static inline int ti_bandgap_validate(struct ti_bandgap *bgp, int id)
}
/**
- * _ti_bandgap_write_threshold() - helper to update TALERT t_cold or t_hot
- * @bgp: struct ti_bandgap pointer
- * @id: bandgap sensor id
- * @val: value (mCelsius) of a new threshold
- * @hot: desired threshold to be updated. true if threshold hot, false if
- * threshold cold
- *
- * It will update the required thresholds (hot and cold) for TALERT signal.
- * This function can be used to update t_hot or t_cold, depending on @hot value.
- * Validates the mCelsius range and update the requested threshold.
- * Call this function only if bandgap features HAS(TALERT).
- *
- * Return: 0 if no error, else corresponding error value.
- */
-static int _ti_bandgap_write_threshold(struct ti_bandgap *bgp, int id, int val,
- bool hot)
-{
- struct temp_sensor_data *ts_data;
- struct temp_sensor_registers *tsr;
- u32 adc_val;
- int ret;
-
- ret = ti_bandgap_validate(bgp, id);
- if (ret)
- return ret;
-
- if (!TI_BANDGAP_HAS(bgp, TALERT))
- return -ENOTSUPP;
-
- ts_data = bgp->conf->sensors[id].ts_data;
- tsr = bgp->conf->sensors[id].registers;
- if (hot) {
- if (val < ts_data->min_temp + ts_data->hyst_val)
- ret = -EINVAL;
- } else {
- if (val > ts_data->max_temp + ts_data->hyst_val)
- ret = -EINVAL;
- }
-
- if (ret)
- return ret;
-
- ret = ti_bandgap_mcelsius_to_adc(bgp, val, &adc_val);
- if (ret < 0)
- return ret;
-
- spin_lock(&bgp->lock);
- ret = ti_bandgap_update_alert_threshold(bgp, id, adc_val, hot);
- spin_unlock(&bgp->lock);
- return ret;
-}
-
-/**
- * _ti_bandgap_read_threshold() - helper to read TALERT t_cold or t_hot
- * @bgp: struct ti_bandgap pointer
- * @id: bandgap sensor id
- * @val: value (mCelsius) of a threshold
- * @hot: desired threshold to be read. true if threshold hot, false if
- * threshold cold
- *
- * It will fetch the required thresholds (hot and cold) for TALERT signal.
- * This function can be used to read t_hot or t_cold, depending on @hot value.
- * Call this function only if bandgap features HAS(TALERT).
- *
- * Return: 0 if no error, -ENOTSUPP if it has no TALERT support, or the
- * corresponding error value if some operation fails.
- */
-static int _ti_bandgap_read_threshold(struct ti_bandgap *bgp, int id,
- int *val, bool hot)
-{
- struct temp_sensor_registers *tsr;
- u32 temp, mask;
- int ret = 0;
-
- ret = ti_bandgap_validate(bgp, id);
- if (ret)
- goto exit;
-
- if (!TI_BANDGAP_HAS(bgp, TALERT)) {
- ret = -ENOTSUPP;
- goto exit;
- }
-
- tsr = bgp->conf->sensors[id].registers;
- if (hot)
- mask = tsr->threshold_thot_mask;
- else
- mask = tsr->threshold_tcold_mask;
-
- temp = ti_bandgap_readl(bgp, tsr->bgap_threshold);
- temp = (temp & mask) >> __ffs(mask);
- ret = ti_bandgap_adc_to_mcelsius(bgp, temp, &temp);
- if (ret) {
- dev_err(bgp->dev, "failed to read thot\n");
- ret = -EIO;
- goto exit;
- }
-
- *val = temp;
-
-exit:
- return ret;
-}
-
-/*** Exposed APIs ***/
-
-/**
- * ti_bandgap_read_thot() - reads sensor current thot
- * @bgp: pointer to bandgap instance
- * @id: sensor id
- * @thot: resulting current thot value
- *
- * Return: 0 on success or the proper error code
- */
-int ti_bandgap_read_thot(struct ti_bandgap *bgp, int id, int *thot)
-{
- return _ti_bandgap_read_threshold(bgp, id, thot, true);
-}
-
-/**
- * ti_bandgap_write_thot() - sets sensor current thot
- * @bgp: pointer to bandgap instance
- * @id: sensor id
- * @val: desired thot value
- *
- * Return: 0 on success or the proper error code
- */
-int ti_bandgap_write_thot(struct ti_bandgap *bgp, int id, int val)
-{
- return _ti_bandgap_write_threshold(bgp, id, val, true);
-}
-
-/**
- * ti_bandgap_read_tcold() - reads sensor current tcold
- * @bgp: pointer to bandgap instance
- * @id: sensor id
- * @tcold: resulting current tcold value
- *
- * Return: 0 on success or the proper error code
- */
-int ti_bandgap_read_tcold(struct ti_bandgap *bgp, int id, int *tcold)
-{
- return _ti_bandgap_read_threshold(bgp, id, tcold, false);
-}
-
-/**
- * ti_bandgap_write_tcold() - sets the sensor tcold
- * @bgp: pointer to bandgap instance
- * @id: sensor id
- * @val: desired tcold value
- *
- * Return: 0 on success or the proper error code
- */
-int ti_bandgap_write_tcold(struct ti_bandgap *bgp, int id, int val)
-{
- return _ti_bandgap_write_threshold(bgp, id, val, false);
-}
-
-/**
* ti_bandgap_read_counter() - read the sensor counter
* @bgp: pointer to bandgap instance
* @id: sensor id