Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965060AbcJYU5m (ORCPT ); Tue, 25 Oct 2016 16:57:42 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:49282 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752333AbcJYU5j (ORCPT ); Tue, 25 Oct 2016 16:57:39 -0400 DMARC-Filter: OpenDMARC Filter v1.3.1 smtp.codeaurora.org 6229461483 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=pass smtp.mailfrom=spjoshi@codeaurora.org From: Sarangdhar Joshi To: Ohad Ben-Cohen , Bjorn Andersson Cc: Sarangdhar Joshi , linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Stephen Boyd , Trilok Soni Subject: [PATCH v2 1/1] remoteproc: Add support for xo clock Date: Tue, 25 Oct 2016 13:57:26 -0700 Message-Id: <1477429046-26855-1-git-send-email-spjoshi@codeaurora.org> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2438 Lines: 92 Add xo clock support required to boot up Qualcomm ADSP processor. The ADSP remoteproc driver keeps xo clock enabled until the driver receives "handover" irq, in order to allow ADSP processor to vote for xo clock with rpm. Signed-off-by: Sarangdhar Joshi --- drivers/remoteproc/qcom_adsp_pil.c | 30 +++++++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) diff --git a/drivers/remoteproc/qcom_adsp_pil.c b/drivers/remoteproc/qcom_adsp_pil.c index 9141633..5bb25d1 100644 --- a/drivers/remoteproc/qcom_adsp_pil.c +++ b/drivers/remoteproc/qcom_adsp_pil.c @@ -15,6 +15,7 @@ * GNU General Public License for more details. */ +#include #include #include #include @@ -48,6 +49,8 @@ struct qcom_adsp { struct qcom_smem_state *state; unsigned stop_bit; + struct clk *xo; + struct regulator *cx_supply; struct completion start_done; @@ -102,10 +105,14 @@ static int adsp_start(struct rproc *rproc) struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv; int ret; - ret = regulator_enable(adsp->cx_supply); + ret = clk_prepare_enable(adsp->xo); if (ret) return ret; + ret = regulator_enable(adsp->cx_supply); + if (ret) + goto disable_clocks; + ret = qcom_scm_pas_auth_and_reset(ADSP_PAS_ID); if (ret) { dev_err(adsp->dev, @@ -126,6 +133,8 @@ static int adsp_start(struct rproc *rproc) disable_regulators: regulator_disable(adsp->cx_supply); +disable_clocks: + clk_disable_unprepare(adsp->xo); return ret; } @@ -223,6 +232,21 @@ static irqreturn_t adsp_stop_ack_interrupt(int irq, void *dev) return IRQ_HANDLED; } +static int adsp_init_clock(struct qcom_adsp *adsp) +{ + int ret; + + adsp->xo = devm_clk_get(adsp->dev, "xo"); + if (IS_ERR(adsp->xo)) { + ret = PTR_ERR(adsp->xo); + if (ret != -EPROBE_DEFER) + dev_err(adsp->dev, "failed to get xo clock"); + return ret; + } + + return 0; +} + static int adsp_init_regulator(struct qcom_adsp *adsp) { adsp->cx_supply = devm_regulator_get(adsp->dev, "cx"); @@ -320,6 +344,10 @@ static int adsp_probe(struct platform_device *pdev) if (ret) goto free_rproc; + ret = adsp_init_clock(adsp); + if (ret) + goto free_rproc; + ret = adsp_init_regulator(adsp); if (ret) goto free_rproc; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project