From patchwork Mon May 18 20:03:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 11556245 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 27CB614C0 for ; Mon, 18 May 2020 20:04:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1082520829 for ; Mon, 18 May 2020 20:04:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="S++3tz7H" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726959AbgERUEJ (ORCPT ); Mon, 18 May 2020 16:04:09 -0400 Received: from mail27.static.mailgun.info ([104.130.122.27]:56393 "EHLO mail27.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726250AbgERUEJ (ORCPT ); Mon, 18 May 2020 16:04:09 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1589832248; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=uo59LCImq0/Qfc0TPHY693ynMcaKgKao0O2qJkiCa9o=; b=S++3tz7H1LksXW6Sw7voLlEWCYJgciwlfuu4/xoZxWmMUlVVWuo9upGiKevZfoy2DVvRtJyJ alsYDhSbmhMQ+sOAhk6E378Y57cz8ttg4uR2bRwbmxks7Yib6Ig10e4hMcMGD5u5quGmVTAY QijuVEuNXe+NC4J4UGxJsXmi6XE= X-Mailgun-Sending-Ip: 104.130.122.27 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5ec2ea37.7f93ace636f8-smtp-out-n04; Mon, 18 May 2020 20:04:07 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 887F0C432C2; Mon, 18 May 2020 20:04:07 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=ham autolearn_force=no version=3.4.0 Received: from bbhatt-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bbhatt) by smtp.codeaurora.org (Postfix) with ESMTPSA id F2FF1C433D2; Mon, 18 May 2020 20:04:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org F2FF1C433D2 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=bbhatt@codeaurora.org From: Bhaumik Bhatt To: manivannan.sadhasivam@linaro.org Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org, jhugo@codeaurora.org, linux-kernel@vger.kernel.org, Bhaumik Bhatt Subject: [PATCH v3 0/7] Introduce features and debugfs/sysfs entries for MHI Date: Mon, 18 May 2020 13:03:54 -0700 Message-Id: <1589832241-13867-1-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 1.9.1 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Introduce independent bus and device voting mechanism for clients and save hardware information from BHI. Allow reading and modifying some MHI variables for debug, test, and informational purposes using debugfs. Read values for device specific hardware information to be used by OEMs in factory testing such as serial number and PK hash using sysfs. This set of patches was tested on arm64 and x86. v3: -Add patch to check for pending packets in suspend as a dependency for the independent voting mechanism introduction -Include register dump entry for debugfs to dump MHI, BHI, and BHIe registers -Update commit message for the debugfs patch -Updated Documentation/ABI with the required info for sysfs -Updated debugfs patch to include a new KConfig entry and dependencies -Updated reviewed-by for some patches v2: -Added a new debugfs.c file for specific debugfs entries and code -Updated commit text and addressed some comments for voting change -Made sure sysfs is only used for serial number and OEM PK hash usage Bhaumik Bhatt (7): bus: mhi: core: Abort suspends due to outgoing pending packets bus: mhi: core: Introduce independent voting mechanism bus: mhi: core: Use generic name field for an MHI device bus: mhi: core: Introduce helper function to check device state bus: mhi: core: Introduce debugfs entries and counters for MHI bus: mhi: core: Read and save device hardware information from BHI bus: mhi: core: Introduce sysfs entries for MHI Documentation/ABI/stable/sysfs-bus-mhi | 25 ++ MAINTAINERS | 1 + drivers/bus/mhi/Kconfig | 8 + drivers/bus/mhi/core/Makefile | 5 +- drivers/bus/mhi/core/boot.c | 17 +- drivers/bus/mhi/core/debugfs.c | 501 +++++++++++++++++++++++++++++++++ drivers/bus/mhi/core/init.c | 80 +++++- drivers/bus/mhi/core/internal.h | 29 ++ drivers/bus/mhi/core/main.c | 6 +- drivers/bus/mhi/core/pm.c | 79 ++++-- include/linux/mhi.h | 39 ++- 11 files changed, 745 insertions(+), 45 deletions(-) create mode 100644 Documentation/ABI/stable/sysfs-bus-mhi create mode 100644 drivers/bus/mhi/core/debugfs.c