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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2D20EC433F5 for ; Sun, 13 Feb 2022 19:59:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238125AbiBMT7Z (ORCPT ); Sun, 13 Feb 2022 14:59:25 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:39706 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238127AbiBMT7W (ORCPT ); Sun, 13 Feb 2022 14:59:22 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 844E953715 for ; Sun, 13 Feb 2022 11:59:11 -0800 (PST) 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 45D0A1063; Sun, 13 Feb 2022 11:59:11 -0800 (PST) Received: from e120937-lin.home (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id A64123F70D; Sun, 13 Feb 2022 11:59:09 -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 v4 7/8] firmware: arm_scmi: Add support for clock_enable_latency Date: Sun, 13 Feb 2022 19:58:31 +0000 Message-Id: <20220213195832.27932-8-cristian.marussi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220213195832.27932-1-cristian.marussi@arm.com> References: <20220213195832.27932-1-cristian.marussi@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org An SCMI platform can optionally advertise an enable latency typically associated with a specific clock resource: add support for parsing such optional message field and export such information in the usual publicly accessible clock descriptor. Signed-off-by: Cristian Marussi --- v1 --> v2 - moved enable_latency flag definition from the previous commit v2 --> v3 - checking for clock_enable_latencty presence, removed RFC tag --- drivers/firmware/arm_scmi/clock.c | 12 +++++++++--- include/linux/scmi_protocol.h | 1 + 2 files changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c index 72f930c0e3e2..cf6fed6dec77 100644 --- a/drivers/firmware/arm_scmi/clock.c +++ b/drivers/firmware/arm_scmi/clock.c @@ -27,7 +27,8 @@ struct scmi_msg_resp_clock_protocol_attributes { struct scmi_msg_resp_clock_attributes { __le32 attributes; #define CLOCK_ENABLE BIT(0) - u8 name[SCMI_MAX_STR_SIZE]; + u8 name[SCMI_MAX_STR_SIZE]; + __le32 clock_enable_latency; }; struct scmi_clock_set_config { @@ -116,10 +117,15 @@ static int scmi_clock_attributes_get(const struct scmi_protocol_handle *ph, attr = t->rx.buf; ret = ph->xops->do_xfer(ph, t); - if (!ret) + if (!ret) { strlcpy(clk->name, attr->name, SCMI_MAX_STR_SIZE); - else + /* Is optional field clock_enable_latency provided ? */ + if (t->rx.len == sizeof(*attr)) + clk->enable_latency = + le32_to_cpu(attr->clock_enable_latency); + } else { clk->name[0] = '\0'; + } ph->xops->xfer_put(ph, t); return ret; diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h index 306e576835f8..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 { -- 2.17.1