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Subject[PATCH v6 06/10] drivers: qcom: rpmh-rsc: allow invalidation of sleep/wake TCS
Date
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>
---

Changes in v6:
- remove unnecessary locks around __tcs_invalidate
- rename function to tcs_invaldiate

Changes in v4:
- refactored the rphm_rsc_invalidate()
---
drivers/soc/qcom/rpmh-rsc.c | 45 +++++++++++++++++++++++++++++++++++++
1 file changed, 45 insertions(+)

diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c
index d169f7da5422..170d4a10275d 100644
--- a/drivers/soc/qcom/rpmh-rsc.c
+++ b/drivers/soc/qcom/rpmh-rsc.c
@@ -101,6 +101,51 @@ 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;
+}
+EXPORT_SYMBOL(rpmh_rsc_invalidate);
+
static struct tcs_group *get_tcs_for_msg(struct rsc_drv *drv,
const struct tcs_request *msg)
{
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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