drivers: qcom: rpmh-rsc: allow invalidation of sleep/wake TCS

Allow sleep and wake commands to be cleared from the respective TCSes,
so that they can be re-populated.

Signed-off-by: Lina Iyer <ilina@codeaurora.org>
Signed-off-by: Raju P.L.S.S.S.N <rplsssn@codeaurora.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c
index 604ebb6757cc7929d6d0710763197183f43fc87b..fed8459c0ef63dfeb845acfd765f1438d4e6b912 100644 (file)
--- a/drivers/soc/qcom/rpmh-rsc.c
+++ b/drivers/soc/qcom/rpmh-rsc.c
@@ -101,6 +101,50 @@ static struct tcs_group *get_tcs_of_type(struct rsc_drv *drv, int type)
        return &drv->tcs[type];
 }
 
+static int tcs_invalidate(struct rsc_drv *drv, int type)
+{
+       int m;
+       struct tcs_group *tcs;
+
+       tcs = get_tcs_of_type(drv, type);
+       if (IS_ERR(tcs))
+               return PTR_ERR(tcs);
+
+       spin_lock(&tcs->lock);
+       if (bitmap_empty(tcs->slots, MAX_TCS_SLOTS)) {
+               spin_unlock(&tcs->lock);
+               return 0;
+       }
+
+       for (m = tcs->offset; m < tcs->offset + tcs->num_tcs; m++) {
+               if (!tcs_is_free(drv, m)) {
+                       spin_unlock(&tcs->lock);
+                       return -EAGAIN;
+               }
+               write_tcs_reg_sync(drv, RSC_DRV_CMD_ENABLE, m, 0);
+       }
+       bitmap_zero(tcs->slots, MAX_TCS_SLOTS);
+       spin_unlock(&tcs->lock);
+
+       return 0;
+}
+
+/**
+ * rpmh_rsc_invalidate - Invalidate sleep and wake TCSes
+ *
+ * @drv: the RSC controller
+ */
+int rpmh_rsc_invalidate(struct rsc_drv *drv)
+{
+       int ret;
+
+       ret = tcs_invalidate(drv, SLEEP_TCS);
+       if (!ret)
+               ret = tcs_invalidate(drv, WAKE_TCS);
+
+       return ret;
+}
+
 static struct tcs_group *get_tcs_for_msg(struct rsc_drv *drv,
                                         const struct tcs_request *msg)
 {