staging: omap-thermal: document omap_bandgap_update_alert_threshold function

Document function to program alert thresholds

Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/omap-thermal/omap-bandgap.c b/drivers/staging/omap-thermal/omap-bandgap.c
index 065f3716c540f761275f6181dfbc4116f6731e06..0eb21b3304151f72a5916f3ce0922f6f8a305557 100644 (file)
--- a/drivers/staging/omap-thermal/omap-bandgap.c
+++ b/drivers/staging/omap-thermal/omap-bandgap.c
@@ -370,6 +370,20 @@ static void omap_bandgap_unmask_interrupts(struct omap_bandgap *bg_ptr, int id,
        omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_mask_ctrl);
 }
 
+/**
+ * omap_bandgap_update_alert_threshold() - sequence to update thresholds
+ * @bg_ptr: struct omap_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).
+ */
 static
 int omap_bandgap_update_alert_threshold(struct omap_bandgap *bg_ptr, int id,
                                        int val, bool hot)