diff --git a/drivers/staging/omap-thermal/omap-bandgap.c b/drivers/staging/omap-thermal/omap-bandgap.c index d001323d1342..2a13bf039811 100644 --- a/drivers/staging/omap-thermal/omap-bandgap.c +++ b/drivers/staging/omap-thermal/omap-bandgap.c @@ -370,108 +370,158 @@ static void omap_bandgap_unmask_interrupts(struct omap_bandgap *bg_ptr, int id, omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_mask_ctrl); } -/* Talert Thot threshold. Call it only if HAS(TALERT) is set */ static -int temp_sensor_configure_thot(struct omap_bandgap *bg_ptr, int id, int t_hot) +int omap_bandgap_update_alert_threshold(struct omap_bandgap *bg_ptr, int id, + int val, bool hot) { struct temp_sensor_data *ts_data = bg_ptr->conf->sensors[id].ts_data; struct temp_sensor_registers *tsr; - u32 thresh_val, reg_val; - int cold, err = 0; + u32 thresh_val, reg_val, t_hot, t_cold; + int err = 0; tsr = bg_ptr->conf->sensors[id].registers; - /* obtain the T cold value */ + /* obtain the current value */ thresh_val = omap_bandgap_readl(bg_ptr, tsr->bgap_threshold); - cold = (thresh_val & tsr->threshold_tcold_mask) >> - __ffs(tsr->threshold_tcold_mask); - if (t_hot <= cold) { - /* change the t_cold to t_hot - 5000 millidegrees */ - err |= omap_bandgap_add_hyst(bg_ptr, t_hot, - -ts_data->hyst_val, &cold); - /* write the new t_cold value */ - reg_val = thresh_val & (~tsr->threshold_tcold_mask); - reg_val |= cold << __ffs(tsr->threshold_tcold_mask); - omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_threshold); - thresh_val = reg_val; + 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 = omap_bandgap_add_hyst(bg_ptr, t_hot, + -ts_data->hyst_val, + &t_cold); + else + err = omap_bandgap_add_hyst(bg_ptr, t_cold, + ts_data->hyst_val, + &t_hot); } - /* write the new t_hot value */ + /* write the new threshold values */ reg_val = thresh_val & ~tsr->threshold_thot_mask; reg_val |= (t_hot << __ffs(tsr->threshold_thot_mask)); - omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_threshold); - if (err) { - dev_err(bg_ptr->dev, "failed to reprogram thot threshold\n"); - return -EIO; - } - - omap_bandgap_unmask_interrupts(bg_ptr, id, t_hot, cold); - - return 0; -} - -/* Talert Tcold threshold. Call it only if HAS(TALERT) is set */ -static -int temp_sensor_configure_tcold(struct omap_bandgap *bg_ptr, int id, - int t_cold) -{ - struct temp_sensor_data *ts_data = bg_ptr->conf->sensors[id].ts_data; - struct temp_sensor_registers *tsr; - u32 thresh_val, reg_val; - int hot, err = 0; - - tsr = bg_ptr->conf->sensors[id].registers; - /* obtain the T cold value */ - thresh_val = omap_bandgap_readl(bg_ptr, tsr->bgap_threshold); - hot = (thresh_val & tsr->threshold_thot_mask) >> - __ffs(tsr->threshold_thot_mask); - - if (t_cold >= hot) { - /* change the t_hot to t_cold + 5000 millidegrees */ - err |= omap_bandgap_add_hyst(bg_ptr, t_cold, - ts_data->hyst_val, &hot); - /* write the new t_hot value */ - reg_val = thresh_val & (~tsr->threshold_thot_mask); - reg_val |= hot << __ffs(tsr->threshold_thot_mask); - omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_threshold); - thresh_val = reg_val; - } - - /* write the new t_cold value */ - reg_val = thresh_val & ~tsr->threshold_tcold_mask; + reg_val |= thresh_val & ~tsr->threshold_tcold_mask; reg_val |= (t_cold << __ffs(tsr->threshold_tcold_mask)); omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_threshold); + if (err) { - dev_err(bg_ptr->dev, "failed to reprogram tcold threshold\n"); - return -EIO; + dev_err(bg_ptr->dev, "failed to reprogram thot threshold\n"); + err = -EIO; + goto exit; } - omap_bandgap_unmask_interrupts(bg_ptr, id, hot, t_cold); - - return 0; + omap_bandgap_unmask_interrupts(bg_ptr, id, t_hot, t_cold); +exit: + return err; } -#define bandgap_is_valid(b) \ - (!IS_ERR_OR_NULL(b)) -#define bandgap_is_valid_sensor_id(b, i) \ - ((i) >= 0 && (i) < (b)->conf->sensor_count) static inline int omap_bandgap_validate(struct omap_bandgap *bg_ptr, int id) { - if (!bandgap_is_valid(bg_ptr)) { + int ret = 0; + + if (IS_ERR_OR_NULL(bg_ptr)) { pr_err("%s: invalid bandgap pointer\n", __func__); - return -EINVAL; + ret = -EINVAL; + goto exit; } - if (!bandgap_is_valid_sensor_id(bg_ptr, id)) { + if ((id < 0) || (id >= bg_ptr->conf->sensor_count)) { dev_err(bg_ptr->dev, "%s: sensor id out of range (%d)\n", __func__, id); - return -ERANGE; + ret = -ERANGE; } +exit: + return ret; +} + +int _omap_bandgap_write_threshold(struct omap_bandgap *bg_ptr, int id, int val, + bool hot) +{ + struct temp_sensor_data *ts_data; + struct temp_sensor_registers *tsr; + u32 adc_val; + int ret; + + ret = omap_bandgap_validate(bg_ptr, id); + if (ret) + goto exit; + + if (!OMAP_BANDGAP_HAS(bg_ptr, TALERT)) { + ret = -ENOTSUPP; + goto exit; + } + + ts_data = bg_ptr->conf->sensors[id].ts_data; + tsr = bg_ptr->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) + goto exit; + + ret = omap_bandgap_mcelsius_to_adc(bg_ptr, val, &adc_val); + if (ret < 0) + goto exit; + + mutex_lock(&bg_ptr->bg_mutex); + omap_bandgap_update_alert_threshold(bg_ptr, id, adc_val, hot); + mutex_unlock(&bg_ptr->bg_mutex); + +exit: + return ret; +} + +int _omap_bandgap_read_threshold(struct omap_bandgap *bg_ptr, int id, + int *val, bool hot) +{ + struct temp_sensor_registers *tsr; + u32 temp, mask; + int ret = 0; + + ret = omap_bandgap_validate(bg_ptr, id); + if (ret) + goto exit; + + if (!OMAP_BANDGAP_HAS(bg_ptr, TALERT)) { + ret = -ENOTSUPP; + goto exit; + } + + tsr = bg_ptr->conf->sensors[id].registers; + if (hot) + mask = tsr->threshold_thot_mask; + else + mask = tsr->threshold_tcold_mask; + + temp = omap_bandgap_readl(bg_ptr, tsr->bgap_threshold); + temp = (temp & mask) >> __ffs(mask); + ret |= omap_bandgap_adc_to_mcelsius(bg_ptr, temp, &temp); + if (ret) { + dev_err(bg_ptr->dev, "failed to read thot\n"); + ret = -EIO; + goto exit; + } + + *val = temp; + +exit: return 0; } -/* Exposed APIs */ +/*** Exposed APIs ***/ + /** * omap_bandgap_read_thot() - reads sensor current thot * @bg_ptr - pointer to bandgap instance @@ -483,30 +533,7 @@ static inline int omap_bandgap_validate(struct omap_bandgap *bg_ptr, int id) int omap_bandgap_read_thot(struct omap_bandgap *bg_ptr, int id, int *thot) { - struct temp_sensor_registers *tsr; - u32 temp; - int ret; - - ret = omap_bandgap_validate(bg_ptr, id); - if (ret) - return ret; - - if (!OMAP_BANDGAP_HAS(bg_ptr, TALERT)) - return -ENOTSUPP; - - tsr = bg_ptr->conf->sensors[id].registers; - temp = omap_bandgap_readl(bg_ptr, tsr->bgap_threshold); - temp = (temp & tsr->threshold_thot_mask) >> - __ffs(tsr->threshold_thot_mask); - ret |= omap_bandgap_adc_to_mcelsius(bg_ptr, temp, &temp); - if (ret) { - dev_err(bg_ptr->dev, "failed to read thot\n"); - return -EIO; - } - - *thot = temp; - - return 0; + return _omap_bandgap_read_threshold(bg_ptr, id, thot, true); } /** @@ -519,32 +546,7 @@ int omap_bandgap_read_thot(struct omap_bandgap *bg_ptr, int id, */ int omap_bandgap_write_thot(struct omap_bandgap *bg_ptr, int id, int val) { - struct temp_sensor_data *ts_data; - struct temp_sensor_registers *tsr; - u32 t_hot; - int ret; - - ret = omap_bandgap_validate(bg_ptr, id); - if (ret) - return ret; - - if (!OMAP_BANDGAP_HAS(bg_ptr, TALERT)) - return -ENOTSUPP; - - ts_data = bg_ptr->conf->sensors[id].ts_data; - tsr = bg_ptr->conf->sensors[id].registers; - - if (val < ts_data->min_temp + ts_data->hyst_val) - return -EINVAL; - ret = omap_bandgap_mcelsius_to_adc(bg_ptr, val, &t_hot); - if (ret < 0) - return ret; - - mutex_lock(&bg_ptr->bg_mutex); - temp_sensor_configure_thot(bg_ptr, id, t_hot); - mutex_unlock(&bg_ptr->bg_mutex); - - return 0; + return _omap_bandgap_write_threshold(bg_ptr, id, val, true); } /** @@ -558,28 +560,7 @@ int omap_bandgap_write_thot(struct omap_bandgap *bg_ptr, int id, int val) int omap_bandgap_read_tcold(struct omap_bandgap *bg_ptr, int id, int *tcold) { - struct temp_sensor_registers *tsr; - u32 temp; - int ret; - - ret = omap_bandgap_validate(bg_ptr, id); - if (ret) - return ret; - - if (!OMAP_BANDGAP_HAS(bg_ptr, TALERT)) - return -ENOTSUPP; - - tsr = bg_ptr->conf->sensors[id].registers; - temp = omap_bandgap_readl(bg_ptr, tsr->bgap_threshold); - temp = (temp & tsr->threshold_tcold_mask) - >> __ffs(tsr->threshold_tcold_mask); - ret |= omap_bandgap_adc_to_mcelsius(bg_ptr, temp, &temp); - if (ret) - return -EIO; - - *tcold = temp; - - return 0; + return _omap_bandgap_read_threshold(bg_ptr, id, tcold, false); } /** @@ -592,32 +573,7 @@ int omap_bandgap_read_tcold(struct omap_bandgap *bg_ptr, int id, */ int omap_bandgap_write_tcold(struct omap_bandgap *bg_ptr, int id, int val) { - struct temp_sensor_data *ts_data; - struct temp_sensor_registers *tsr; - u32 t_cold; - int ret; - - ret = omap_bandgap_validate(bg_ptr, id); - if (ret) - return ret; - - if (!OMAP_BANDGAP_HAS(bg_ptr, TALERT)) - return -ENOTSUPP; - - ts_data = bg_ptr->conf->sensors[id].ts_data; - tsr = bg_ptr->conf->sensors[id].registers; - if (val > ts_data->max_temp + ts_data->hyst_val) - return -EINVAL; - - ret = omap_bandgap_mcelsius_to_adc(bg_ptr, val, &t_cold); - if (ret < 0) - return ret; - - mutex_lock(&bg_ptr->bg_mutex); - temp_sensor_configure_tcold(bg_ptr, id, t_cold); - mutex_unlock(&bg_ptr->bg_mutex); - - return 0; + return _omap_bandgap_write_threshold(bg_ptr, id, val, false); } /**