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[109.252.192.53]) by smtp.gmail.com with ESMTPSA id w28sm2231490ljd.48.2020.12.04.21.48.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Dec 2020 21:48:00 -0800 (PST) From: Dmitry Osipenko To: Nick Dyer , Dmitry Torokhov , Rob Herring , Thierry Reding , Jonathan Hunter , Linus Walleij , Jiada Wang Cc: linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/3] dt-bindings: input: atmel_mxt_ts: Document atmel, wakeup-method and wake-GPIO Date: Sat, 5 Dec 2020 08:47:47 +0300 Message-Id: <20201205054749.26487-2-digetx@gmail.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201205054749.26487-1-digetx@gmail.com> References: <20201205054749.26487-1-digetx@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Some Atmel touchscreen controllers have a WAKE line that needs to be asserted low in order to wake up controller from a deep sleep. Document the wakeup methods and the wake-GPIO properties. Signed-off-by: Dmitry Osipenko --- .../bindings/input/atmel,maxtouch.yaml | 26 +++++++++++++++++++ include/dt-bindings/input/atmel-maxtouch.h | 10 +++++++ 2 files changed, 36 insertions(+) create mode 100644 include/dt-bindings/input/atmel-maxtouch.h diff --git a/Documentation/devicetree/bindings/input/atmel,maxtouch.yaml b/Documentation/devicetree/bindings/input/atmel,maxtouch.yaml index 8c6418f76e94..7924a16dc248 100644 --- a/Documentation/devicetree/bindings/input/atmel,maxtouch.yaml +++ b/Documentation/devicetree/bindings/input/atmel,maxtouch.yaml @@ -39,6 +39,13 @@ properties: (active low). The line must be flagged with GPIO_ACTIVE_LOW. + wake-gpios: + maxItems: 1 + description: + Optional GPIO specifier for the touchscreen's wake pin + (active low). The line must be flagged with + GPIO_ACTIVE_LOW. + linux,gpio-keymap: $ref: /schemas/types.yaml#/definitions/uint32-array description: | @@ -53,6 +60,23 @@ properties: or experiment to determine which bit corresponds to which input. Use KEY_RESERVED for unused padding values. + atmel,wakeup-method: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + The WAKE line is an active-low input that is used to wake up the touch + controller from deep-sleep mode before communication with the controller + could be started. This feature used to minimize current consumption + when the controller is in deep sleep mode. + + The WAKE pin can be connected in one of the following ways: + 1) left permanently low + 2) connected to the I2C-compatible SCL pin + 3) connected to a GPIO pin on the host + enum: + - 0 # ATMEL_MXT_WAKEUP_NONE + - 1 # ATMEL_MXT_WAKEUP_I2C_SCL + - 2 # ATMEL_MXT_WAKEUP_GPIO + required: - compatible - reg @@ -63,6 +87,7 @@ additionalProperties: false examples: - | #include + #include #include i2c { #address-cells = <1>; @@ -75,6 +100,7 @@ examples: reset-gpios = <&gpio 27 GPIO_ACTIVE_LOW>; vdda-supply = <&ab8500_ldo_aux2_reg>; vdd-supply = <&ab8500_ldo_aux5_reg>; + atmel,wakeup-method = ; }; }; diff --git a/include/dt-bindings/input/atmel-maxtouch.h b/include/dt-bindings/input/atmel-maxtouch.h new file mode 100644 index 000000000000..7345ab32224d --- /dev/null +++ b/include/dt-bindings/input/atmel-maxtouch.h @@ -0,0 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ + +#ifndef _DT_BINDINGS_ATMEL_MAXTOUCH_H +#define _DT_BINDINGS_ATMEL_MAXTOUCH_H + +#define ATMEL_MXT_WAKEUP_NONE 0 +#define ATMEL_MXT_WAKEUP_I2C_SCL 1 +#define ATMEL_MXT_WAKEUP_GPIO 2 + +#endif /* _DT_BINDINGS_ATMEL_MAXTOUCH_H */