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Tue, 10 Jan 2023 00:33:02 -0800 (PST) Received: from localhost.localdomain ([180.217.149.10]) by smtp.gmail.com with ESMTPSA id z3-20020a626503000000b005871b73e27dsm5064950pfb.33.2023.01.10.00.32.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Jan 2023 00:33:01 -0800 (PST) From: Jim Liu To: JJLIU0@nuvoton.com, KWLIU@nuvoton.com, linus.walleij@linaro.org, brgl@bgdev.pl, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org Cc: linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, openbmc@lists.ozlabs.org, Jim Liu Subject: [PATCH v4 3/3] dt-bindings: gpio: add NPCM sgpio driver bindings Date: Tue, 10 Jan 2023 16:32:38 +0800 Message-Id: <20230110083238.19230-4-jim.t90615@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230110083238.19230-1-jim.t90615@gmail.com> References: <20230110083238.19230-1-jim.t90615@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Add dt-bindings document for the Nuvoton NPCM7xx and NPCM8xx sgpio driver Signed-off-by: Jim Liu --- Changes for v4: - modify in/out property - modify bus-frequency property Changes for v3: - modify description - modify in/out property name Changes for v2: - modify description --- .../bindings/gpio/nuvoton,sgpio.yaml | 92 +++++++++++++++++++ 1 file changed, 92 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/nuvoton,sgpio.yaml diff --git a/Documentation/devicetree/bindings/gpio/nuvoton,sgpio.yaml b/Documentation/devicetree/bindings/gpio/nuvoton,sgpio.yaml new file mode 100644 index 000000000000..3c01ce61f8d9 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/nuvoton,sgpio.yaml @@ -0,0 +1,92 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/gpio/nuvoton,sgpio.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Nuvoton SGPIO controller + +maintainers: + - Jim LIU + +description: + This SGPIO controller is for NUVOTON NPCM7xx and NPCM8xx SoC. + Nuvoton NPCM7xx SGPIO module is combine serial to parallel IC (HC595) + and parallel to serial IC (HC165), and use APB3 clock to control it. + This interface has 4 pins (D_out , D_in, S_CLK, LDSH). + NPCM7xx/NPCM8xx have two sgpio module each module can support up + to 64 output pins,and up to 64 input pin, the pin is only for gpi or gpo. + GPIO pins have sequential, First half is gpo and second half is gpi. + GPIO pins can be programmed to support the following options + - Support interrupt option for each input port and various interrupt + sensitivity option (level-high, level-low, edge-high, edge-low) + - ngpios is number of nuvoton,input-ngpios GPIO lines and nuvoton,output-ngpios GPIO lines. + nuvoton,input-ngpios GPIO lines is only for gpi. + nuvoton,output-ngpios GPIO lines is only for gpo. + +properties: + compatible: + enum: + - nuvoton,npcm750-sgpio + - nuvoton,npcm845-sgpio + + reg: + maxItems: 1 + + gpio-controller: true + + '#gpio-cells': + const: 2 + + interrupts: + maxItems: 1 + + clocks: + maxItems: 1 + + nuvoton,input-ngpios: + description: The numbers of GPIO's exposed. + GPIO lines is only for gpi. + minimum: 0 + maximum: 64 + + nuvoton,output-ngpios: + description: The numbers of GPIO's exposed. + GPIO lines is only for gpo. + minimum: 0 + maximum: 64 + + bus-frequency: + description: Directly connected to APB bus and + its shift clock is from APB bus clock divided by a programmable value. + default: 8000000 + +required: + - compatible + - reg + - gpio-controller + - '#gpio-cells' + - interrupts + - nuvoton,input-ngpios + - nuvoton,output-ngpios + - clocks + - bus-frequency + +additionalProperties: false + +examples: + - | + #include + #include + gpio8: gpio@101000 { + compatible = "nuvoton,npcm750-sgpio"; + reg = <0x101000 0x200>; + clocks = <&clk NPCM7XX_CLK_APB3>; + interrupts = ; + bus-frequency = <8000000>; + gpio-controller; + #gpio-cells = <2>; + nuvoton,input-ngpios = <64>; + nuvoton,output-ngpios = <64>; + status = "disabled"; + };