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Tue, 23 Apr 2024 10:59:17 -0700 (PDT) Received: from prasmi.home ([2a00:23c8:2500:a01:cef0:9ed3:1428:f85f]) by smtp.gmail.com with ESMTPSA id fl5-20020a05600c0b8500b0041abeaaf7f0sm2808145wmb.28.2024.04.23.10.59.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Apr 2024 10:59:17 -0700 (PDT) From: Prabhakar X-Google-Original-From: Prabhakar To: Geert Uytterhoeven , Linus Walleij , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Magnus Damm , linux-renesas-soc@vger.kernel.org Cc: linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Fabrizio Castro , Lad Prabhakar Subject: [PATCH v2 02/13] dt-bindings: pinctrl: renesas: Document RZ/V2H(P) SoC Date: Tue, 23 Apr 2024 18:58:49 +0100 Message-Id: <20240423175900.702640-3-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240423175900.702640-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20240423175900.702640-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Lad Prabhakar Add documentation for the pin controller found on the Renesas RZ/V2H(P) (R9A09G057) SoC. The RZ/V2H PFC varies slightly compared to the RZ/G2L family: - Additional bits need to be set during pinmuxing. - The GPIO pin count is different. Hence, a SoC-specific compatible string, 'renesas,r9a09g057-pinctrl', is added for the RZ/V2H(P) SoC. Also, add the 'renesas,output-impedance' property. The drive strength setting on RZ/V2H(P) depends on the different power rails coming out from the PMIC (connected via I2C). These power rails (required for drive strength) can be 1.2V, 1.8V, or 3.3V. Pins are grouped into 4 groups: Group 1: Impedance - 150/75/38/25 ohms (at 3.3V) - 130/65/33/22 ohms (at 1.8V) Group 2: Impedance - 50/40/33/25 ohms (at 1.8V) Group 3: Impedance - 150/75/37.5/25 ohms (at 3.3V) - 130/65/33/22 ohms (at 1.8V) Group 4: Impedance - 110/55/30/20 ohms (at 1.8V) - 150/75/38/25 ohms (at 1.2V) The 'renesas,output-impedance' property, as documented, can be [0, 1, 2, 3], indicating x1/x2/x3/x4 drive strength. As power rail information may not be available very early in the boot process, the 'renesas,output-impedance' property is added instead of reusing the 'output-impedance-ohms' property. Also, allow bias-disable, bias-pull-down and bias-pull-up properties as these can be used to configure the pins. Signed-off-by: Lad Prabhakar --- RFC->v2 - Renamed renesas-rzv2h,output-impedance -> renesas,output-impedance - Updated values for renesas,output-impedance - Added bias properties --- .../pinctrl/renesas,rzg2l-pinctrl.yaml | 25 ++++++++++++++++--- 1 file changed, 21 insertions(+), 4 deletions(-) diff --git a/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-pinctrl.yaml index 881e992adca3..089b3ce61bac 100644 --- a/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-pinctrl.yaml +++ b/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-pinctrl.yaml @@ -26,6 +26,7 @@ properties: - renesas,r9a07g043-pinctrl # RZ/G2UL{Type-1,Type-2} and RZ/Five - renesas,r9a07g044-pinctrl # RZ/G2{L,LC} - renesas,r9a08g045-pinctrl # RZ/G3S + - renesas,r9a09g057-pinctrl # RZ/V2H(P) - items: - enum: @@ -66,10 +67,14 @@ properties: maxItems: 1 resets: - items: - - description: GPIO_RSTN signal - - description: GPIO_PORT_RESETN signal - - description: GPIO_SPARE_RESETN signal + oneOf: + - items: + - description: GPIO_RSTN signal + - description: GPIO_PORT_RESETN signal + - description: GPIO_SPARE_RESETN signal + - items: + - description: PFC main reset + - description: Reset for the control register related to WDTUDFCA and WDTUDFFCM pins additionalProperties: anyOf: @@ -111,6 +116,18 @@ additionalProperties: output-high: true output-low: true line-name: true + bias-disable: true + bias-pull-down: true + bias-pull-up: true + renesas,output-impedance: + description: | + Output impedance for pins on RZ/V2H(P) SoC. + 0: Corresponds to x1 + 1: Corresponds to x2 + 2: Corresponds to x3 + 3: Corresponds to x4 + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1, 2, 3] - type: object additionalProperties: