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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D0C94C433F5 for ; Mon, 24 Jan 2022 10:06:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=HBL5fd3TzfizQMebgswWlypVKWKu1gIMGPFZUmPXm3c=; b=qjE1wqYGr/uuxI MzvuNA+iwWdW2L3AgQuuX5A4Rhl52wLhC+IOpwF4jhh6zZWLQsLbe0/jylUxloEmBwpw+Ok4d0Mgb iNoRps7T7mIDQBBsM60pblBbfELySVrCs20UXviSlJIZ+GsZOPP3C3urpHqqfmXFeIDpEizqA7NXW OL37lOlSY8XYT5ehVKziB3n/p4yjbf9530bOzW1s+7a6JfOYgQax/7vLfvpJgObf4Y4LuAWe8wMyj EwexEGvFbF2ZWDgpyufyqpo3ODCz+M1RWZNRwb0CRvQpinjOw2s+B0oVyDYIqy/ZPLcBCHHsGzwRO gN6Sq37GMjO9GXo40ncg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nBwDV-002uNM-OV; Mon, 24 Jan 2022 10:04:53 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nBwCt-002uAb-E8 for linux-arm-kernel@lists.infradead.org; Mon, 24 Jan 2022 10:04:17 +0000 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 9FE2FD6E; Mon, 24 Jan 2022 02:04:14 -0800 (PST) Received: from e120937-lin.home (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9CFE13F73B; Mon, 24 Jan 2022 02:04:12 -0800 (PST) From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.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, peter.hilber@opensynergy.com, igor.skalkin@opensynergy.com, cristian.marussi@arm.com Subject: [PATCH 4/6] firmware: arm_scmi: Add atomic support to clock protocol Date: Mon, 24 Jan 2022 10:03:39 +0000 Message-Id: <20220124100341.41191-5-cristian.marussi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220124100341.41191-1-cristian.marussi@arm.com> References: <20220124100341.41191-1-cristian.marussi@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220124_020415_629751_1E524F35 X-CRM114-Status: GOOD ( 11.82 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Introduce new _atomic variant for SCMI clock protocol operations related to enable disable operations: when an atomic operation is required the xfer poll_completion flag is set for that transaction. Signed-off-by: Cristian Marussi --- drivers/firmware/arm_scmi/clock.c | 22 +++++++++++++++++++--- include/linux/scmi_protocol.h | 4 ++++ 2 files changed, 23 insertions(+), 3 deletions(-) diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c index 35b56c8ba0c0..72f930c0e3e2 100644 --- a/drivers/firmware/arm_scmi/clock.c +++ b/drivers/firmware/arm_scmi/clock.c @@ -273,7 +273,7 @@ static int scmi_clock_rate_set(const struct scmi_protocol_handle *ph, static int scmi_clock_config_set(const struct scmi_protocol_handle *ph, u32 clk_id, - u32 config) + u32 config, bool atomic) { int ret; struct scmi_xfer *t; @@ -284,6 +284,8 @@ scmi_clock_config_set(const struct scmi_protocol_handle *ph, u32 clk_id, if (ret) return ret; + t->hdr.poll_completion = atomic; + cfg = t->tx.buf; cfg->id = cpu_to_le32(clk_id); cfg->attributes = cpu_to_le32(config); @@ -296,12 +298,24 @@ scmi_clock_config_set(const struct scmi_protocol_handle *ph, u32 clk_id, static int scmi_clock_enable(const struct scmi_protocol_handle *ph, u32 clk_id) { - return scmi_clock_config_set(ph, clk_id, CLOCK_ENABLE); + return scmi_clock_config_set(ph, clk_id, CLOCK_ENABLE, false); } static int scmi_clock_disable(const struct scmi_protocol_handle *ph, u32 clk_id) { - return scmi_clock_config_set(ph, clk_id, 0); + return scmi_clock_config_set(ph, clk_id, 0, false); +} + +static int scmi_clock_enable_atomic(const struct scmi_protocol_handle *ph, + u32 clk_id) +{ + return scmi_clock_config_set(ph, clk_id, CLOCK_ENABLE, true); +} + +static int scmi_clock_disable_atomic(const struct scmi_protocol_handle *ph, + u32 clk_id) +{ + return scmi_clock_config_set(ph, clk_id, 0, true); } static int scmi_clock_count_get(const struct scmi_protocol_handle *ph) @@ -330,6 +344,8 @@ static const struct scmi_clk_proto_ops clk_proto_ops = { .rate_set = scmi_clock_rate_set, .enable = scmi_clock_enable, .disable = scmi_clock_disable, + .enable_atomic = scmi_clock_enable_atomic, + .disable_atomic = scmi_clock_disable_atomic, }; static int scmi_clock_protocol_init(const struct scmi_protocol_handle *ph) diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h index fdf6bd83cc59..b87551f41f9f 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -42,6 +42,7 @@ struct scmi_revision_info { struct scmi_clock_info { char name[SCMI_MAX_STR_SIZE]; + unsigned int enable_latency; bool rate_discrete; union { struct { @@ -82,6 +83,9 @@ struct scmi_clk_proto_ops { u64 rate); int (*enable)(const struct scmi_protocol_handle *ph, u32 clk_id); int (*disable)(const struct scmi_protocol_handle *ph, u32 clk_id); + int (*enable_atomic)(const struct scmi_protocol_handle *ph, u32 clk_id); + int (*disable_atomic)(const struct scmi_protocol_handle *ph, + u32 clk_id); }; /** -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel