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Thu, 5 Sep 2024 00:14:48 -0500 Received: from [127.0.1.1] (lcpd911.dhcp.ti.com [172.24.227.68] (may be forged)) by lelvsmtp6.itg.ti.com (8.15.2/8.15.2) with ESMTP id 4855EiKw040071; Thu, 5 Sep 2024 00:14:45 -0500 From: Dhruva Gole Date: Thu, 5 Sep 2024 10:44:32 +0530 Subject: [PATCH v2] dt-bindings: opp: operating-points-v2-ti-cpu: Describe opp-supported-hw Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20240905-b4-opp-dt-binding-fix-v2-1-1e3d2a06748d@ti.com> X-B4-Tracking: v=1; b=H4sIADc+2WYC/4WNSw7CIBRFt9K8sc8ApT9H7sN0YAu0byAQIETTs HexG3B4TnLPPSDqQDrCrTkg6EyRnK0gLg2s+9NuGklVBsGEZBNrcZHovEeVcCGryG5o6I1Du/a jmIaOKwF164Ou+uw+5so7xeTC57zJ/Gf/FTNHhmbQfOxl16vJ3BNdV/eCuZTyBQJ9Fue3AAAA To: Viresh Kumar , Nishanth Menon , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley CC: Viresh Kumar , Vignesh Raghavendra , , , , Dhruva Gole X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1725513284; l=2568; i=d-gole@ti.com; s=20240902; h=from:subject:message-id; bh=aG+evR3+/5qIXwTAJgFCZS/zyQH8AV2X8iY2rmN/CA0=; b=LkCqPjg3unfYAuZU/6ZBUvp8D3NacezwVDYTn8T2pqvDNKDcGULhOtIu5JR0sep0MtqgTLcV7 gwDhndcGsuiAgsehtB9pFBwuS7uip3ZeTwZ5DU5hPywWM1DrZAlQ9ni X-Developer-Key: i=d-gole@ti.com; a=ed25519; pk=yOC9jqVaW3GN10oty8eZJ20dN4jcpE8JVoaODDmyZvA= 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 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 --- .../bindings/opp/operating-points-v2-ti-cpu.yaml | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) --- base-commit: ecc768a84f0b8e631986f9ade3118fa37852fef0 change-id: 20240903-b4-opp-dt-binding-fix-73c6829751d2 Best regards, 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 02d1d2c17129..fd260b20c59c 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 +45,21 @@ patternProperties: clock-latency-ns: true opp-hz: true opp-microvolt: true - opp-supported-hw: true + opp-supported-hw: + description: | + Two bitfields indicating: + 1. Which 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 + 2. Which eFuse bits indicate this OPP is available. + The device datasheet has a table talking about Device Speed Grades. + If one were to sort this table and only retain 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) and (2) will be set, which means + the value shall be 0x7. opp-suspend: true turbo-mode: true