From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lina Iyer Subject: [PATCH v6 06/10] drivers: qcom: rpmh-rsc: allow invalidation of sleep/wake TCS Date: Thu, 19 Apr 2018 16:16:31 -0600 Message-ID: <20180419221635.17849-7-ilina@codeaurora.org> References: <20180419221635.17849-1-ilina@codeaurora.org> Return-path: In-Reply-To: <20180419221635.17849-1-ilina@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org To: andy.gross@linaro.org, david.brown@linaro.org, linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org Cc: rnayak@codeaurora.org, bjorn.andersson@linaro.org, linux-kernel@vger.kernel.org, sboyd@kernel.org, evgreen@chromium.org, dianders@chromium.org, Lina Iyer List-Id: linux-arm-msm@vger.kernel.org Allow sleep and wake commands to be cleared from the respective TCSes, so that they can be re-populated. Signed-off-by: Lina Iyer --- 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