From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9DCD5C07E9C for ; Mon, 12 Jul 2021 14:19:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 850D061166 for ; Mon, 12 Jul 2021 14:19:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235172AbhGLOWm (ORCPT ); Mon, 12 Jul 2021 10:22:42 -0400 Received: from foss.arm.com ([217.140.110.172]:56158 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235139AbhGLOWl (ORCPT ); Mon, 12 Jul 2021 10:22:41 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C6C331FB; Mon, 12 Jul 2021 07:19:52 -0700 (PDT) Received: from e120937-lin.home (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C51B43F774; Mon, 12 Jul 2021 07:19:48 -0700 (PDT) From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, virtualization@lists.linux-foundation.org, virtio-dev@lists.oasis-open.org Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com, Jonathan.Cameron@Huawei.com, f.fainelli@gmail.com, etienne.carriere@linaro.org, vincent.guittot@linaro.org, souvik.chakravarty@arm.com, cristian.marussi@arm.com, igor.skalkin@opensynergy.com, peter.hilber@opensynergy.com, alex.bennee@linaro.org, jean-philippe@linaro.org, mikhail.golubev@opensynergy.com, anton.yakovlev@opensynergy.com, Vasyl.Vavrychuk@opensynergy.com, Andriy.Tryshnivskyy@opensynergy.com Subject: [PATCH v6 15/17] firmware: arm_scmi: Add optional link_supplier() transport op Date: Mon, 12 Jul 2021 15:18:31 +0100 Message-Id: <20210712141833.6628-16-cristian.marussi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210712141833.6628-1-cristian.marussi@arm.com> References: <20210712141833.6628-1-cristian.marussi@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Peter Hilber Some transports are also effectively registered with other kernel subsystem in order to be properly probed and initialized; as a consequence such kind of transports, and their related devices, might still not have been probed and initialized at the time the main SCMI core driver is probed. Add an optional .link_supplier() transport operation which can be used by the core SCMI stack to dynamically check if the transport is ready and dynamically link its device to the platform instance device. Signed-off-by: Peter Hilber [ Cristian: reworded commit message ] Signed-off-by: Cristian Marussi --- v5 --> v6 - reworded commit message --- drivers/firmware/arm_scmi/common.h | 2 ++ drivers/firmware/arm_scmi/driver.c | 6 ++++++ 2 files changed, 8 insertions(+) diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h index 7a1e84dc191b..e6403ebe59ca 100644 --- a/drivers/firmware/arm_scmi/common.h +++ b/drivers/firmware/arm_scmi/common.h @@ -331,6 +331,7 @@ struct scmi_chan_info { /** * struct scmi_transport_ops - Structure representing a SCMI transport ops * + * @link_supplier: Optional callback to add link to a supplier device * @chan_available: Callback to check if channel is available or not * @chan_setup: Callback to allocate and setup a channel * @chan_free: Callback to free a channel @@ -345,6 +346,7 @@ struct scmi_chan_info { * @poll_done: Callback to poll transfer status */ struct scmi_transport_ops { + int (*link_supplier)(struct device *dev); bool (*chan_available)(struct device *dev, int idx); int (*chan_setup)(struct scmi_chan_info *cinfo, struct device *dev, bool tx); diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index 24039be7599d..1be86ab40be3 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -1810,6 +1810,12 @@ static int scmi_probe(struct platform_device *pdev) handle->devm_protocol_get = scmi_devm_protocol_get; handle->devm_protocol_put = scmi_devm_protocol_put; + if (desc->ops->link_supplier) { + ret = desc->ops->link_supplier(dev); + if (ret) + return ret; + } + ret = scmi_txrx_setup(info, dev, SCMI_PROTOCOL_BASE); if (ret) return ret; -- 2.17.1