From patchwork Thu Jul 20 07:04:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kathiravan Thirumoorthy X-Patchwork-Id: 705107 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4A4C6C001DE for ; Thu, 20 Jul 2023 07:04:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231432AbjGTHEs (ORCPT ); Thu, 20 Jul 2023 03:04:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39358 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229907AbjGTHEn (ORCPT ); Thu, 20 Jul 2023 03:04:43 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 909C11723; Thu, 20 Jul 2023 00:04:42 -0700 (PDT) Received: from pps.filterd (m0279867.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36K4Gk1w020529; Thu, 20 Jul 2023 07:04:33 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=qcppdkim1; bh=rlnqwi6sqaXJr13Sd1wqlXyfhSC1e2jz6p+qlS6FkDk=; b=TvBwFfjZYPF33N7BekpP8LuN5DG04BfrqKFSGlObCeSASbNReBhan9szMZCzqZUzTBqY qLdk2a9yBMBj59ILeiu6EgZGrVm0nvVLuPe2vEbCROY0PNlXtSOuEezemes/EOelzegs xp8WTAe2T4gC+qXZ/ay7CAEySh5fph9ZTkmS8ziSg6NYbMwDJpeW14Z4mPkdNuxf6n6+ Al6h9q/D7VwEkjaV13qTwq0x5vC54QyCBVhpwSg+DVzCJRHyLpgxGKvSjihpoNnXG69G OAfjyS65JfYSmS4Ve7R1q5z08uEshEj0ElH/gIBUH30L48iMtwSyJOZEmT90ILbHyt61 2Q== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3rxt188kqm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 20 Jul 2023 07:04:33 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 36K74W01020273 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 20 Jul 2023 07:04:32 GMT Received: from hu-kathirav-blr.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.30; Thu, 20 Jul 2023 00:04:28 -0700 From: Kathiravan T To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Linus Walleij , Elliot Berman , "Mukesh Ojha" , Kalle Valo , Loic Poulain , , , CC: , , , , Srinivas Kandagatla , Kathiravan T Subject: [PATCH V5 1/3] firmware: qcom_scm: provide a read-modify-write function Date: Thu, 20 Jul 2023 12:34:06 +0530 Message-ID: <20230720070408.1093698-2-quic_kathirav@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230720070408.1093698-1-quic_kathirav@quicinc.com> References: <20230720070408.1093698-1-quic_kathirav@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: SFg7GbUsYJ3z3oknpmlr1L6_Ieow1fEQ X-Proofpoint-GUID: SFg7GbUsYJ3z3oknpmlr1L6_Ieow1fEQ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-19_16,2023-07-19_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 suspectscore=0 priorityscore=1501 mlxlogscore=657 adultscore=0 impostorscore=0 malwarescore=0 clxscore=1015 bulkscore=0 mlxscore=0 spamscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307200058 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org From: Mukesh Ojha It was realized by Srinivas K. that there is a need of read-modify-write scm exported function so that it can be used by multiple clients. Let's introduce qcom_scm_io_update_field() which masks out the bits and write the passed value to that bit-offset. Suggested-by: Srinivas Kandagatla Signed-off-by: Mukesh Ojha Signed-off-by: Kathiravan T Reviewed-by: Elliot Berman --- Changes in V5: - No changes drivers/firmware/qcom_scm.c | 15 +++++++++++++++ include/linux/firmware/qcom/qcom_scm.h | 2 ++ 2 files changed, 17 insertions(+) diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c index fde33acd46b7..104d86e49b97 100644 --- a/drivers/firmware/qcom_scm.c +++ b/drivers/firmware/qcom_scm.c @@ -407,6 +407,21 @@ int qcom_scm_set_remote_state(u32 state, u32 id) } EXPORT_SYMBOL(qcom_scm_set_remote_state); +int qcom_scm_io_update_field(phys_addr_t addr, unsigned int mask, unsigned int val) +{ + unsigned int old, new; + int ret; + + ret = qcom_scm_io_readl(addr, &old); + if (ret) + return ret; + + new = (old & ~mask) | (val & mask); + + return qcom_scm_io_writel(addr, new); +} +EXPORT_SYMBOL(qcom_scm_io_update_field); + static int __qcom_scm_set_dload_mode(struct device *dev, bool enable) { struct qcom_scm_desc desc = { diff --git a/include/linux/firmware/qcom/qcom_scm.h b/include/linux/firmware/qcom/qcom_scm.h index 250ea4efb7cb..ca41e4eb33ad 100644 --- a/include/linux/firmware/qcom/qcom_scm.h +++ b/include/linux/firmware/qcom/qcom_scm.h @@ -84,6 +84,8 @@ extern bool qcom_scm_pas_supported(u32 peripheral); extern int qcom_scm_io_readl(phys_addr_t addr, unsigned int *val); extern int qcom_scm_io_writel(phys_addr_t addr, unsigned int val); +extern int qcom_scm_io_update_field(phys_addr_t addr, unsigned int mask, + unsigned int val); extern bool qcom_scm_restore_sec_cfg_available(void); extern int qcom_scm_restore_sec_cfg(u32 device_id, u32 spare);