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Wed, 01 May 2024 09:52:15 -0700 (PDT) Received: from kousik.local ([2405:201:c006:31f8:c3a6:8218:5d12:51ef]) by smtp.gmail.com with ESMTPSA id gd22-20020a056a00831600b006e6fc52ecd0sm22758866pfb.123.2024.05.01.09.52.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 May 2024 09:52:14 -0700 (PDT) From: Kousik Sanagavarapu To: Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Shuah Khan , Javier Carrasco , Kousik Sanagavarapu Subject: [PATCH v3] spi: dt-bindings: ti,qspi: convert to dtschema Date: Wed, 1 May 2024 22:18:53 +0530 Message-ID: <20240501165203.13763-1-five231003@gmail.com> X-Mailer: git-send-email 2.45.0.rc1.8.ge326e52010 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Convert txt binding of TI's qspi controller (found on their omap SoCs) to dtschema to allow for validation. The changes, w.r.t. the original txt binding, are: - Introduce "clocks" and "clock-names" which was never mentioned. - Reflect that "ti,hwmods" is deprecated and is not a "required" property anymore. - Introduce "num-cs" which allows for setting the number of chip selects. - Drop "qspi_ctrlmod". Signed-off-by: Kousik Sanagavarapu Reviewed-by: Krzysztof Kozlowski --- Changes since v1: - Removed a redundant paragraph in the commit message. - Mention that we are dropping "qspi_ctrlmod", which I forgot to do in the last iteration. Changes since v2: - Don't make "num-cs" an array. - The max number of syscon-chipselects is now 1. - Make the unit-address in the example right. - Fix a typo in "syscon-chipselects"'s description. .../devicetree/bindings/spi/ti,qspi.yaml | 96 +++++++++++++++++++ .../devicetree/bindings/spi/ti_qspi.txt | 53 ---------- 2 files changed, 96 insertions(+), 53 deletions(-) create mode 100644 Documentation/devicetree/bindings/spi/ti,qspi.yaml delete mode 100644 Documentation/devicetree/bindings/spi/ti_qspi.txt diff --git a/Documentation/devicetree/bindings/spi/ti,qspi.yaml b/Documentation/devicetree/bindings/spi/ti,qspi.yaml new file mode 100644 index 000000000000..626a915b3d77 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/ti,qspi.yaml @@ -0,0 +1,96 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/spi/ti,qspi.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: TI QSPI controller + +maintainers: + - Kousik Sanagavarapu + +allOf: + - $ref: spi-controller.yaml# + +properties: + compatible: + enum: + - ti,am4372-qspi + - ti,dra7xxx-qspi + + reg: + items: + - description: base registers + - description: mapped memory + + reg-names: + items: + - const: qspi_base + - const: qspi_mmap + + clocks: + maxItems: 1 + + clock-names: + items: + - const: fck + + interrupts: + maxItems: 1 + + num-cs: + minimum: 1 + maximum: 4 + default: 1 + + ti,hwmods: + description: + Name of the hwmod associated to the QSPI. This is for legacy + platforms only. + $ref: /schemas/types.yaml#/definitions/string + deprecated: true + + syscon-chipselects: + description: + Handle to system control region containing QSPI chipselect register + and offset of that register. + $ref: /schemas/types.yaml#/definitions/phandle-array + items: + - items: + - description: phandle to system control register + - description: register offset + + spi-max-frequency: + description: Maximum SPI clocking speed of the controller in Hz. + $ref: /schemas/types.yaml#/definitions/uint32 + +required: + - compatible + - reg + - reg-names + - clocks + - clock-names + - interrupts + +unevaluatedProperties: false + +examples: + - | + #include + #include + + spi@4b300000 { + compatible = "ti,dra7xxx-qspi"; + reg = <0x4b300000 0x100>, + <0x5c000000 0x4000000>; + reg-names = "qspi_base", "qspi_mmap"; + syscon-chipselects = <&scm_conf 0x558>; + #address-cells = <1>; + #size-cells = <0>; + clocks = <&l4per2_clkctrl DRA7_L4PER2_QSPI_CLKCTRL 25>; + clock-names = "fck"; + num-cs = <4>; + spi-max-frequency = <48000000>; + interrupts = ; + }; +... diff --git a/Documentation/devicetree/bindings/spi/ti_qspi.txt b/Documentation/devicetree/bindings/spi/ti_qspi.txt deleted file mode 100644 index 47b184bce414..000000000000 --- a/Documentation/devicetree/bindings/spi/ti_qspi.txt +++ /dev/null @@ -1,53 +0,0 @@ -TI QSPI controller. - -Required properties: -- compatible : should be "ti,dra7xxx-qspi" or "ti,am4372-qspi". -- reg: Should contain QSPI registers location and length. -- reg-names: Should contain the resource reg names. - - qspi_base: Qspi configuration register Address space - - qspi_mmap: Memory mapped Address space - - (optional) qspi_ctrlmod: Control module Address space -- interrupts: should contain the qspi interrupt number. -- #address-cells, #size-cells : Must be present if the device has sub-nodes -- ti,hwmods: Name of the hwmod associated to the QSPI - -Recommended properties: -- spi-max-frequency: Definition as per - Documentation/devicetree/bindings/spi/spi-bus.txt - -Optional properties: -- syscon-chipselects: Handle to system control region contains QSPI - chipselect register and offset of that register. - -NOTE: TI QSPI controller requires different pinmux and IODelay -parameters for Mode-0 and Mode-3 operations, which needs to be set up by -the bootloader (U-Boot). Default configuration only supports Mode-0 -operation. Hence, "spi-cpol" and "spi-cpha" DT properties cannot be -specified in the slave nodes of TI QSPI controller without appropriate -modification to bootloader. - -Example: - -For am4372: -qspi: qspi@47900000 { - compatible = "ti,am4372-qspi"; - reg = <0x47900000 0x100>, <0x30000000 0x4000000>; - reg-names = "qspi_base", "qspi_mmap"; - #address-cells = <1>; - #size-cells = <0>; - spi-max-frequency = <25000000>; - ti,hwmods = "qspi"; -}; - -For dra7xx: -qspi: qspi@4b300000 { - compatible = "ti,dra7xxx-qspi"; - reg = <0x4b300000 0x100>, - <0x5c000000 0x4000000>, - reg-names = "qspi_base", "qspi_mmap"; - syscon-chipselects = <&scm_conf 0x558>; - #address-cells = <1>; - #size-cells = <0>; - spi-max-frequency = <48000000>; - ti,hwmods = "qspi"; -};