From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avaneesh Kumar Dwivedi Subject: [RESEND PATCH v4 6/7] remoteproc: qcom: Modify stop routine to limit MX current for v56 1.5 Date: Thu, 24 Nov 2016 15:30:37 +0530 Message-ID: <1479981638-32069-7-git-send-email-akdwived@codeaurora.org> References: <1479981638-32069-1-git-send-email-akdwived@codeaurora.org> Return-path: Received: from smtp.codeaurora.org ([198.145.29.96]:45796 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936356AbcKXKBP (ORCPT ); Thu, 24 Nov 2016 05:01:15 -0500 In-Reply-To: <1479981638-32069-1-git-send-email-akdwived@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org List-Id: linux-arm-msm@vger.kernel.org To: bjorn.andersson@linaro.org Cc: sboyd@codeaurora.org, agross@codeaurora.org, linux-arm-msm@vger.kernel.org, Avaneesh Kumar Dwivedi For v56 1.5.0 Mx current need to be limited during restart. Signed-off-by: Avaneesh Kumar Dwivedi --- drivers/remoteproc/qcom_q6v5_pil.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/remoteproc/qcom_q6v5_pil.c b/drivers/remoteproc/qcom_q6v5_pil.c index 7ea2f53..3e3ed09 100644 --- a/drivers/remoteproc/qcom_q6v5_pil.c +++ b/drivers/remoteproc/qcom_q6v5_pil.c @@ -785,7 +785,7 @@ static int q6v5_start(struct rproc *rproc) static int q6v5_stop(struct rproc *rproc) { struct q6v5 *qproc = (struct q6v5 *)rproc->priv; - int ret; + int ret, val; qproc->running = false; @@ -803,6 +803,22 @@ static int q6v5_stop(struct rproc *rproc) q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_modem); q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_nc); + if (qproc->hexagon_ver & 0x2) { + /* + * Assert QDSP6 I/O clamp, memory wordline clamp, and compiler + * memory clamp as a software workaround to avoid high MX + * current during LPASS/MSS restart. + */ + ret = clk_prepare_enable(devm_clk_get(qproc->dev, "iface")); + if (!ret) { + val = readl_relaxed( + qproc->reg_base + QDSP6SS_PWR_CTL_REG); + val |= (Q6SS_CLAMP_IO | QDSP6v56_CLAMP_WL | + QDSP6v56_CLAMP_QMC_MEM); + writel_relaxed(val, + qproc->reg_base + QDSP6SS_PWR_CTL_REG); + } + } reset_control_assert(qproc->mss_restart); q6v5_clk_disable(qproc); q6v5_regulator_disable(qproc); -- Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.