From patchwork Wed Sep 18 05:33:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dhruva Gole X-Patchwork-Id: 13806578 Received: from fllv0016.ext.ti.com (fllv0016.ext.ti.com [198.47.19.142]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B697228EF; Wed, 18 Sep 2024 05:34:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.47.19.142 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726637652; cv=none; b=Bs5I6sezOCkxJCNKQdRASwi1z+zebzmATCuqf9xajM8eN/3gXwU/1h66bP8zM3nACWfRoZQMYsIqJj62SqLeUqciMdq3oNSMkG9kOh9UTHnLVX4qQj/TMgLRx6Jvwew85ZIc1eEhue0uJpxr9pFkP2U3KQNxrdBrpSkjwDk/CUY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726637652; c=relaxed/simple; bh=47LcJsNhe3Q6Cp1GPETm73vBJVu68n/EDM2gQLNv2Yg=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=q96S9oh6o6KXpcQLQ2xi2HWirAu4iuQ2115qFTWK/EPxHszkr4X+1r/6oBKXluu0ovljMQXu68xfVQomT4/ynw/lKlo3ZrB8YY44keR9kuwoOyCx9YUWLvbFCg/SieRgG9iBRn2hZXc+4MGzwnzougWEOCRbthgye5GUUEKYQkg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com; spf=pass smtp.mailfrom=ti.com; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b=meAZafJQ; arc=none smtp.client-ip=198.47.19.142 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ti.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="meAZafJQ" Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 48I5Y11O042584; Wed, 18 Sep 2024 00:34:01 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1726637641; bh=bBrfxxqaMxb+JqIXSG+RpOR5aaAPDTbk6xtGPwtRVQ8=; h=From:To:CC:Subject:Date; b=meAZafJQJdpzTjlVHp4yxwzhawWNOJitk17iblvgR4GW+yWGeuf4Ha2SxFTqnd8s3 OLVkiwvKXa6Pww5eMPcfwFQLMvW6oKO2jNaeuRE7h/BoaSDF3iy0jwMnGKgFTD2ekV WNdllBN0Y9nD9Dgl6PTCTYlTODJFIZxseWLjx2xY= Received: from DFLE112.ent.ti.com (dfle112.ent.ti.com [10.64.6.33]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 48I5Y15h079059 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 18 Sep 2024 00:34:01 -0500 Received: from DFLE110.ent.ti.com (10.64.6.31) by DFLE112.ent.ti.com (10.64.6.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Wed, 18 Sep 2024 00:34:01 -0500 Received: from lelvsmtp5.itg.ti.com (10.180.75.250) by DFLE110.ent.ti.com (10.64.6.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Wed, 18 Sep 2024 00:34:01 -0500 Received: from lcpd911.dhcp.ti.com (lcpd911.dhcp.ti.com [10.24.72.240]) by lelvsmtp5.itg.ti.com (8.15.2/8.15.2) with ESMTP id 48I5XveY015656; Wed, 18 Sep 2024 00:33:57 -0500 From: Dhruva Gole To: Viresh Kumar , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley CC: , , , Dhruva Gole , , Subject: [PATCH v4] dt-bindings: opp: operating-points-v2-ti-cpu: Describe opp-supported-hw Date: Wed, 18 Sep 2024 11:03:17 +0530 Message-ID: <20240918053317.1390626-1-d-gole@ti.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 It seems like we missed migrating the complete information from the old DT binding where we had described what the opp-supported-hw is supposed to describe. Hence, bring back the description from the previous binding to the current one along with a bit more context on what the values are supposed to be. Fixes: e576a9a8603f ("dt-bindings: cpufreq: Convert ti-cpufreq to json schema") Signed-off-by: Dhruva Gole --- Changes in v4: - Fix dt_binding_check errors on previous revision. - As per Rob's suggestion, used a blank line in between description and the paragraph. - Reworded the description a bit. - Link to v3: https://lore.kernel.org/all/20240917095252.1292321-1-d-gole@ti.com/ Changes in v3: - Use the items: and then provide description for both required items. This tries to address Rob's comments on previous revision. - I've not use min/max Items as the 2 descriptions items implicitly imply that number of bitfields needed are 2. - Link to v2: https://lore.kernel.org/all/20240905-b4-opp-dt-binding-fix-v2-1-1e3d2a06748d@ti.com/ Changes in v2: - Drop the patch where I updated Maintainers since it's already picked by Viresh. - Add more details of how to populate the property based on device documents like TRM/ datasheet. - Link to v1: https://lore.kernel.org/r/20240903-b4-opp-dt-binding-fix-v1-0-f7e186456d9f@ti.com --- .../opp/operating-points-v2-ti-cpu.yaml | 20 ++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/opp/operating-points-v2-ti-cpu.yaml b/Documentation/devicetree/bindings/opp/operating-points-v2-ti-cpu.yaml index fd0c8d5c5f3e..7c07410638db 100644 --- a/Documentation/devicetree/bindings/opp/operating-points-v2-ti-cpu.yaml +++ b/Documentation/devicetree/bindings/opp/operating-points-v2-ti-cpu.yaml @@ -45,7 +45,25 @@ patternProperties: clock-latency-ns: true opp-hz: true opp-microvolt: true - opp-supported-hw: true + opp-supported-hw: + items: + items: + - description: + + The revision of the SoC the OPP is supported by. + This can be easily obtained from the datasheet of the + part being ordered/used. For eg. it will be 0x01 for SR1.0 + - description: + + The eFuse bits that indicate the particular OPP is available. + The device datasheet has a table talking about Device Speed Grades. + This table is to be sorted with only the unique elements of the + MAXIMUM OPERATING FREQUENCY starting from the first row + which tells the lowest OPP, to the highest. The corresponding bits + need to be set based on N elements of speed grade the device supports. + So, if there are 3 possible unique MAXIMUM OPERATING FREQUENCY + in the table, then BIT(0) | (1) | (2) will be set, which means + the value shall be 0x7. opp-suspend: true turbo-mode: true