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[83.8.128.191]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a626cda46e1sm251842566b.196.2024.05.25.06.28.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 25 May 2024 06:28:08 -0700 (PDT) From: Artur Weber Date: Sat, 25 May 2024 15:28:06 +0200 Subject: [PATCH v4 2/9] ASoC: dt-bindings: samsung,midas-audio: Add GPIO-based headset jack detection Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240525-midas-wm1811-gpio-jack-v4-2-f488e03bd8c7@gmail.com> References: <20240525-midas-wm1811-gpio-jack-v4-0-f488e03bd8c7@gmail.com> In-Reply-To: <20240525-midas-wm1811-gpio-jack-v4-0-f488e03bd8c7@gmail.com> To: Sylwester Nawrocki , Krzysztof Kozlowski Cc: Liam Girdwood , Mark Brown , Rob Herring , Conor Dooley , Jaroslav Kysela , Takashi Iwai , Alim Akhtar , alsa-devel@alsa-project.org, linux-sound@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht, Artur Weber X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1716643685; l=2328; i=aweber.kernel@gmail.com; s=20231030; h=from:subject:message-id; bh=Rsl4K9dB39cIJFWh12QWC6byH17AfCNyG1AGcEHy56E=; b=VNuxPjI5euL5nPUvXQhYTV/hpQPtChvapioTHtcSQs/+z/mENYr3KDtB+9gBSeEivCEerZK5p 9DGuSbFHIJZAbOQ2gV7eXkUb/2PKxPzwrTr3VdIZIAQlJ3PaqU92shJ X-Developer-Key: i=aweber.kernel@gmail.com; a=ed25519; pk=RhDBfWbJEHqDibXbhNEBAnc9FMkyznGxX/hwfhL8bv8= Some Samsung devices that share the midas-audio driver use a GPIO-based approach to headset jack detection, as opposed to using the built-in jack detection provided by the wm8994 driver. This setup uses two GPIOs (one for jack detection and another for key detection) and an ADC channel for determining the jack type or button pressed. Add DT configuration values that allow for describing these setups. Signed-off-by: Artur Weber Reviewed-by: Krzysztof Kozlowski --- Changes in v3: - Re-added pipe (|) to description of samsung,headset-button-threshold- microvolt to prevent syntax error (otherwise the "in order: ..." part is interpreted as a list) Changes in v2: - Added vendor prefix to threshold properties - Dropped pipe (|) character from description: field --- .../bindings/sound/samsung,midas-audio.yaml | 30 ++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/Documentation/devicetree/bindings/sound/samsung,midas-audio.yaml b/Documentation/devicetree/bindings/sound/samsung,midas-audio.yaml index 6ed53dd0bb53..69ddfd4afdcd 100644 --- a/Documentation/devicetree/bindings/sound/samsung,midas-audio.yaml +++ b/Documentation/devicetree/bindings/sound/samsung,midas-audio.yaml @@ -64,6 +64,36 @@ properties: maxItems: 1 description: GPIO pin for line out selection + headset-detect-gpios: + maxItems: 1 + description: GPIO for detection of headset insertion + + headset-key-gpios: + maxItems: 1 + description: GPIO for detection of headset key press + + io-channels: + maxItems: 1 + description: IO channel to read micbias voltage for headset detection + + io-channel-names: + const: headset-detect + + samsung,headset-4pole-threshold-microvolt: + minItems: 2 + maxItems: 2 + description: + Array containing minimum and maximum IO channel value for 4-pole + (with microphone/button) headsets. If the IO channel value is + outside of this range, a 3-pole headset is assumed. + + samsung,headset-button-threshold-microvolt: + minItems: 3 + maxItems: 3 + description: | + Array of minimum (inclusive) IO channel values for headset button + detection, in order: "Media", "Volume Up" and "Volume Down". + required: - compatible - cpu