From patchwork Thu Feb 17 13:12:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 12750028 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 43BAEC433EF for ; Thu, 17 Feb 2022 13:15:40 +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=+0tuCdPX4j0u56zi0qKthpub6jyBSlU1XCWMMW1L3zs=; b=Ah6ybjBus26jpS HFGjusjP2e4I3V7d1um+itQ+Q36w+guWluYta1i1FyndjGWc338ZlVlvakrPZqZZQFnjIpsot9Wur drZ6RgVd5Lj3ZaZdbOpv9G5S7VmgQAK2tFu3EBq7+eGy7isalqYLVZl3bDgI/+a4o5dwFcl1eUMcQ 0EP3B2Jey/E8saxN8oT9ACOGQ0vLpiFnTbkSib+6dQu6fv3Dy+LdwYiElbEsN5d2r6h50fHWmcx9K dO42ByYU9ZWILZSobrke2mmHQgm/QXcLjrrntk3ZcW1eZgLlEICh1KW5t15OB8Vov6AmmxHU3TIMo 71DsQYd4qtRB8CAWwmIA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nKgc5-00AYcN-Ji; Thu, 17 Feb 2022 13:14:26 +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 1nKgam-00AY1O-Db for linux-arm-kernel@lists.infradead.org; Thu, 17 Feb 2022 13:13:10 +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 BE6BD152F; Thu, 17 Feb 2022 05:13:03 -0800 (PST) Received: from e120937-lin.home (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 29B493F66F; Thu, 17 Feb 2022 05:13:02 -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 v5 6/8] firmware: arm_scmi: Add atomic support to clock protocol Date: Thu, 17 Feb 2022 13:12:32 +0000 Message-Id: <20220217131234.50328-7-cristian.marussi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220217131234.50328-1-cristian.marussi@arm.com> References: <20220217131234.50328-1-cristian.marussi@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220217_051304_577804_C849BA57 X-CRM114-Status: GOOD ( 11.46 ) 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 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 --- v1 --> v2 - removed enable_latency flag in clock_info since it does not belong to this commit really --- drivers/firmware/arm_scmi/clock.c | 22 +++++++++++++++++++--- include/linux/scmi_protocol.h | 3 +++ 2 files changed, 22 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..306e576835f8 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -82,6 +82,9 @@ 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); }; /**