From patchwork Wed Oct 23 16:39:42 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Asutosh Das (asd)" X-Patchwork-Id: 11207179 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D0A00913 for ; Wed, 23 Oct 2019 16:39:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B987221928 for ; Wed, 23 Oct 2019 16:39:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2405105AbfJWQjz (ORCPT ); Wed, 23 Oct 2019 12:39:55 -0400 Received: from alexa-out-sd-01.qualcomm.com ([199.106.114.38]:34133 "EHLO alexa-out-sd-01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389276AbfJWQjy (ORCPT ); Wed, 23 Oct 2019 12:39:54 -0400 Received: from unknown (HELO ironmsg01-sd.qualcomm.com) ([10.53.140.141]) by alexa-out-sd-01.qualcomm.com with ESMTP; 23 Oct 2019 09:39:53 -0700 IronPort-SDR: mz+7h+OMI2ZZzTJNYiSIiPnZ+ZG1mjzsBPpUklpGAlY0DxT8efTlRrD9pMsJlhl1LjTnc5ViLw jWuuPWdF7G/KtV6HCIvF7f9zCcM1/zAhUZ+6s+DxXf9WaL8735LK8QS4MqTeOf1YDlz/WyJD5a BuXeBHVYtY5bxIr710jiT7hS2ZmVN1NNxU0Y2mXiz4uL9vanZ3hTk67qr/ArilKed2iKHF0K8c FDiGmMq69mwL9Mx1QYM5GCMBkFiHScJBa/gIvIDUtPYQnwfAwIoYHxx+d62W/bMIsTs3N0Ojp6 m3hC8/tmmJFX9fpGwj6hH+ND Received: from asutoshd-linux1.qualcomm.com ([10.46.160.39]) by ironmsg01-sd.qualcomm.com with ESMTP; 23 Oct 2019 09:39:52 -0700 Received: by asutoshd-linux1.qualcomm.com (Postfix, from userid 92687) id 98C1F2135F; Wed, 23 Oct 2019 09:39:52 -0700 (PDT) From: Asutosh Das To: cang@codeaurora.org, rnayak@codeaurora.org, vinholikatti@gmail.com, jejb@linux.vnet.ibm.com, martin.petersen@oracle.com Cc: linux-scsi@vger.kernel.org, kernel-team@android.com, saravanak@google.com, salyzyn@google.com, Asutosh Das , Andy Gross , Alim Akhtar , Avri Altman , Pedro Sousa , "James E.J. Bottomley" , linux-arm-msm@vger.kernel.org (open list:ARM/QUALCOMM SUPPORT), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v2 2/2] scsi: ufs-qcom: enter and exit hibern8 during clock scaling Date: Wed, 23 Oct 2019 09:39:42 -0700 Message-Id: <1571848785-27698-2-git-send-email-asutoshd@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1571848785-27698-1-git-send-email-asutoshd@codeaurora.org> References: <1571848785-27698-1-git-send-email-asutoshd@codeaurora.org> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Qualcomm controller needs to be in hibern8 before scaling clocks. This change puts the controller in hibern8 state before scaling and brings it out after scaling of clocks. Signed-off-by: Asutosh Das --- drivers/scsi/ufs/ufs-qcom.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index a5b7148..d117088 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -1305,6 +1305,9 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, int err = 0; if (status == PRE_CHANGE) { + err = ufshcd_uic_hibern8_enter(hba); + if (err) + return err; if (scale_up) err = ufs_qcom_clk_scale_up_pre_change(hba); else @@ -1324,6 +1327,7 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, dev_req_params->hs_rate, false); ufs_qcom_update_bus_bw_vote(host); + ufshcd_uic_hibern8_exit(hba); } out: