From nobody Tue Jun 16 17:06:26 2026 Received: from mail-wm1-f43.google.com (mail-wm1-f43.google.com [209.85.128.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 75ECB3FFAB6 for ; Thu, 30 Apr 2026 09:47:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.43 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777542446; cv=none; b=sqN0350f7FDBg+LeHSGEMM0uxwP114pr9LvLRvpdfMhqLkQqB6uCCkC/bUaArCy8UtBEOq6DlEfxAm3TLt1Fq+TaQUfKQRQEJ19mB9L770W/swZUjkOJLujVtm5Fhhtwu/G+2RLgF7UEs5tNKhVBgY+llYsix9agdLE9djIEhQ0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777542446; c=relaxed/simple; bh=8cCbXbkb6HowjU8II83CA2d+DXwOgvOAWQTPrH5Iibs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=G5/kNoP6Gy6U6NtQRalAYLw+7YQgvKvdEGN9fQ2Ig6v4S88/vTvUAslaD96lz0cSSFd9itwk/nW2D1pNywrm571Ru8CXRik3tq4oupjjM0dL3bDLNB9g7Tqh51LX8yqHt4UrWDB5ZT6v5+gQIBBTCe6Dm4yCPP4buk52Pwptlgw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=eexJNnp/; arc=none smtp.client-ip=209.85.128.43 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="eexJNnp/" Received: by mail-wm1-f43.google.com with SMTP id 5b1f17b1804b1-48984d29fe3so9542505e9.0 for ; Thu, 30 Apr 2026 02:47:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1777542443; x=1778147243; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=fFOILrRBRgckVtvDGiEi9gDf/W6MgY2gnxmqTdTmRWk=; b=eexJNnp/sIsC/fFZAoNHQobm+uaOSGYKSo0LeSjN3Yj0WNu5kLsD3rMeQwJ8t/N3Qz n2sVFDQ0WSZUIesK+vKyO672DN3GIwqNKwGY4v4R0rCOam3T+K1UgyXT6wppn+gBx47T +tXuQAipixDw53xTKHWCFuCu8T6sEJgRqKt+uzFRvr0Hfbp1x6nlRyXkI+Q2p+tHsaMa A0TRob2QnUpgkiINyoKZKVVlgPqQGCU8rnGhKnhq4r8yYPUnGquXG3RlGAo6mq71qu8K wwTE1LNLZ6L72sWQrhejI5QxhxQDENtpq25gSiyO9okuH0KXbc00QyEeZdJJFC6iKnBw FGOQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777542443; x=1778147243; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-gg:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=fFOILrRBRgckVtvDGiEi9gDf/W6MgY2gnxmqTdTmRWk=; b=lj36lg6jWVY5sdqbtYqouxiO4t4vObzAf+1a5wuFqYNNS4HsZwzoLkJ/xnc60cJZ+5 vOafLLAAnZzWhhU7lUqBhGrV6+wwwKwQbF+P4Z4xzZ4EZY1gttWSbygaKZCPiJrVTsg6 dmEveY8Cst3uW6D3txjfdRqf1oZDB51BzwjWfhtNeqrvzpMYbA7Bw5zMOGUtWURXK+HM 0EIYsEtlWFXfVYvMPtOWV0FU5yeez5V3rS4DQlLQPfmzgJO/dWPUh68tIa3aaJ2E610x GPLAE2fNLMctDX1vRcZBrCySZwuEENoj5NyxA6D/BuOnLrHPX1bhHraB4wzpaF9e7l9u gMdA== X-Forwarded-Encrypted: i=1; AFNElJ9yocjXaP4uyVmOy/ZtWNeNxWrClAmJ9Ui+ijzuXzNssbOMH9yxWW4TOZCfnyBW8iVZPCdduQI7sQWqgQY=@vger.kernel.org X-Gm-Message-State: AOJu0YxD8jjeZ/raBnleICxolQPR1OENcetsBwHNYf7VnKCLKtwGmAgt NyWNiQOx/kmAYW//skakQQue7cqlnkIYPo0/vKQTrBVvsvaLmVbdzOqbfcQJNEiCaBU= X-Gm-Gg: AeBDievZ/g4zX3UHId8E0hf4z4aRwwdKz+FGdlFoyZCBoltymXKN3DU/zX6ld+pRCdI a0qGmNZIeGtokj0u7QQkeLSoXcGu+/YVBk6nyeB3OfhU4flvTr9oaAEfnVoWPcVhSFk7TAk4w8s csNCpkGK96fupGU1eGmYHw5260E1ErYheZ/KS8eSr7jTAWcVL//aDAaq4CNBS1aFJ0s4yJanxIX GG8L5lz0tqoNPSTdznf+Fob9dYfBNHxWtKgdvUJWKx2qwx2FMa131yJrSoBjRDxYTXWMC+fyqM2 boQXUPxvc89xsFzAYsR1Q8Xj0d/pkAPPuLYixj+fk5h0DUriZAULdKkfzv4IJEeQl7PlFm6fj7K tb+7l8MmTlWIskPkEJwhuRlS8iaInOE2hJ4n1xRyCXSarI2JiQ9e5C4vBlxurYG0d2CcOLsUIAx jyYHNFO7JkknobEWsgUSye+xZJkg0eOw8vbauJv/fUGO4xr8/46medwfc= X-Received: by 2002:a05:600c:1d1a:b0:485:30d4:6b9e with SMTP id 5b1f17b1804b1-48a84458d16mr38530725e9.21.1777542442688; Thu, 30 Apr 2026 02:47:22 -0700 (PDT) Received: from arrakeen.starnux.net ([2a01:e0a:106d:1080:52eb:f6ff:feb3:451a]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48a81b9493bsm48984745e9.0.2026.04.30.02.47.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 Apr 2026 02:47:22 -0700 (PDT) From: Neil Armstrong Date: Thu, 30 Apr 2026 11:47:15 +0200 Subject: [PATCH v2 1/2] dt-bindings: leds: backlight: document the SY7758 6-channel High Efficiency LED Driver Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260430-topic-sm8650-ayaneo-pocket-s2-sy7758-v2-1-308140640de9@linaro.org> References: <20260430-topic-sm8650-ayaneo-pocket-s2-sy7758-v2-0-308140640de9@linaro.org> In-Reply-To: <20260430-topic-sm8650-ayaneo-pocket-s2-sy7758-v2-0-308140640de9@linaro.org> To: Lee Jones , Daniel Thompson , Jingoo Han , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Helge Deller Cc: dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, KancyJoe , Neil Armstrong , Krzysztof Kozlowski X-Mailer: b4 0.15.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=1824; i=neil.armstrong@linaro.org; h=from:subject:message-id; bh=8cCbXbkb6HowjU8II83CA2d+DXwOgvOAWQTPrH5Iibs=; b=owEBbQKS/ZANAwAKAXfc29rIyEnRAcsmYgBp8yUnzS9s/rNYIg4dn9FI8VZvUMuIuqoBd+WZtYZI QPZ3Z6eJAjMEAAEKAB0WIQQ9U8YmyFYF/h30LIt33NvayMhJ0QUCafMlJwAKCRB33NvayMhJ0eVOD/ 4iGxCE+8I/QFYrllxJKnhUZFHl8HMTtdxoFG7PFzk+6AybCIPeTgtXhV628A+jBtobbwOmpa8lYmTw bw5tb0FkOZw/kL6p6ukGxjwco5q5ugX0hz9/FynTkud8ZA9audIzPz71rbv12BYNHSWZ99usLzVm7K DGQhfdRnczkmhK9O87HOO/dLd4rk/t6PRwYcy9WIKUawl11vZnvxePmBid56ePdc/JvP5+21nv+QtQ b9cH7qagTCEqGjMzbJKXMISqn4yYYQUvVww4UDmuUleN03Fe6F/4xzKK987/Z9+/8fbl2ZG+I39RB6 wnwXNWQ+jDAU4r7Hv46jh2eriog2NLULu1KmbV5vtc87au1OYzUKjxcRmOPoVZgE8roCwI5apcZQri uC709c3kvzNVFIhLHnRomoTHAleHemKFNJobfAOaj0JGZE2FERK443MmcB20oKSNcl4EE8pV7wDpq5 R9xYgmrskFChg35b6q0CygN7e1AA6Zn0Mnwd8b0NH251vrv8FZFIdMz3jCyUWkN+EtzHKXELoo7Uz6 9mporJIAv7Sk8deTPHunmWbKkkdfUfFcunUPy3gdhcfFm4cqZhyAXV6oHB0Dra3jIhQqFf1fVK15QQ y4bGSD4xh54d5p5ngNo55iIK0Pr9Wao00VF+bLK4PUxzFnWYVVQjXKAxlDfg== X-Developer-Key: i=neil.armstrong@linaro.org; a=openpgp; fpr=89EC3D058446217450F22848169AB7B1A4CFF8AE Document the Silergy SY7758 6-channel High Efficiency LED Driver used for backlight brightness control. Reviewed-by: Krzysztof Kozlowski Signed-off-by: Neil Armstrong Reviewed-by: Daniel Thompson (RISCstar) --- .../bindings/leds/backlight/silergy,sy7758.yaml | 53 ++++++++++++++++++= ++++ 1 file changed, 53 insertions(+) diff --git a/Documentation/devicetree/bindings/leds/backlight/silergy,sy775= 8.yaml b/Documentation/devicetree/bindings/leds/backlight/silergy,sy7758.ya= ml new file mode 100644 index 000000000000..80e978d691c2 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/silergy,sy7758.yaml @@ -0,0 +1,53 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/backlight/silergy,sy7758.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Silergy SY7758 6-channel High Efficiency LED Driver + +maintainers: + - Neil Armstrong + +description: + Silergy SY7758 is a high efficiency 6-channels LED backlight + driver with I2C brightness control. + +allOf: + - $ref: common.yaml# + +properties: + compatible: + const: silergy,sy7758 + + reg: + maxItems: 1 + + vddio-supply: true + + enable-gpios: + maxItems: 1 + +required: + - compatible + - reg + - vddio-supply + - enable-gpios + +unevaluatedProperties: false + +examples: + - | + #include + + i2c { + #address-cells =3D <1>; + #size-cells =3D <0>; + + backlight@11 { + compatible =3D "silergy,sy7758"; + reg =3D <0x11>; + vddio-supply =3D <&bl_vddio>; + enable-gpios =3D <&gpio 16 GPIO_ACTIVE_HIGH>; + }; + }; --=20 2.34.1 From nobody Tue Jun 16 17:06:26 2026 Received: from mail-wm1-f46.google.com (mail-wm1-f46.google.com [209.85.128.46]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 99DBC402B8A for ; Thu, 30 Apr 2026 09:47:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.46 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777542448; cv=none; b=d5MLC1c46cvCRcLtxOXS/mOy2fqMqOcj9gmlen+7+7ki6IGLXbA6aTZlqKbejFVypqxCeNznHGudc8Sv2MuYJTWxUuVfx1KCl5QoUO5vQihR89tw+hV0ZReHEpQCfQTzFp2eDQCRHpTAqd80IA2ICduMp6DDaugxTvBhvM4+xHw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777542448; c=relaxed/simple; bh=XrDuU794qprgNSeW5W4bCAApe8VeiBfNu6bUAv6dbrQ=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ocaFKtQVbAMxZ0xx/TFrzWOE6r5IovjMywL8O3UVPZxNkhFoYIisxZNWtucgdVQFSJqGJkgbqOBQfug/KH7R/8jIjuTbUm+sLeJRXM00XVjbv1k8WUIf58AvLd16sa8jnr6WKr2xJVHSHuPIWNbOqOi5/ztQegRin2+4DIgkxBI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=oOHwMywE; arc=none smtp.client-ip=209.85.128.46 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="oOHwMywE" Received: by mail-wm1-f46.google.com with SMTP id 5b1f17b1804b1-48896199cbaso5953265e9.1 for ; Thu, 30 Apr 2026 02:47:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1777542444; x=1778147244; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=OVGWuVeYZSrHV7cWGaHlLzujxCFV0Ak9I1vcraKctWc=; b=oOHwMywET91YJXSkBpK49nxU2CEpO2eYIJ4UZKvoB3nV44b97qjF0gUtHmOMHia8qs r90xIWv1cpwIz+MnEtZ6x+NRSw8x6bjz5mxMerqjkENERkIBnlykWCYiVlzDlvRRSEXq 1SIUcaxTBaWCyEzReTWl3AIOC0HmbaKxYvweCjPZ0ycc9yzAK3Iv5H27fkTt/wjBRbwo PblFyZmo4jSqjWhmtRZBBP9HuawybCMpsKFiDngP9qDbV5ue5L9hj/89nPuTuCKAqL3L dr84Ia1yAiMPJDga0xsX2CVwYNRFC5vVCmDWXlXf72kEbSO8GFcAFlpDr6/ojdB219nf Fpyg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777542444; x=1778147244; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-gg:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=OVGWuVeYZSrHV7cWGaHlLzujxCFV0Ak9I1vcraKctWc=; b=GdrmNTxrPW9SVLoLjvGasI8cImv//wjuMdwRioOmztGvLlF3naiVgC0CcSusmmERyB H9Ia4SAFToucQh7lVPeC7mEn+ur4k017tDuyX7cTc575/hYb1O/3fr2Uf15OY2rhbHfh 5vp+o29wx1kJqueBGpqplxLGAETnRerZsp8CgaZ0heSNA/RP2HY0HG3cjL3sSlQJbxW2 fOArvofTLh/z3LrEpvQM/QYN0pOe/f9xblePt4BeE43+BswB/Svd0sFdrikaz5Dh1X5s tEQUQTBHy3aJAMoYr8g9e4K0yPRhL5iLG8TkTUKr71E5WOZ42zQsAZnJT5PlnZq/qGtg w54w== X-Forwarded-Encrypted: i=1; AFNElJ8tZkBXike2p2yZZOrmQ6fUC/CMqys14IPlzOsA2x/RtJg+exy8Os6niR1b5gLt4uqKs0RDDK7JAk2Hc08=@vger.kernel.org X-Gm-Message-State: AOJu0YxRBGETMNk8sFuAYT+CEyX+izU2bSShAju7lwiCcaHdnvvB4MSW Aty2Kilh6+7zWOznUaFJmQusZeBg4O8RKMA9z3/QiS3i/I/oU3TzQzzuk0A0C5/GUko= X-Gm-Gg: AeBDietS9uNXQQuz5CjUHKdJb8kNZRkZ/YtNk4HV7p6/kiLKWOWbTbT96PIdenlL/Xs rumZpRXDqjhsq7glgJk4FKbENmUy1rF+vvvPclcnIetSv55GFdurWn/yNpUbN2ZU6xNMlmFuphz 8AJ9js2MaTfx+mHDZ5pH+iRSnzECZFhNi2hM5AepHqlY5fllms8Uj8/PjlyoHHsLVW0XUFaopCz pme5NEnRMXOjfDm2p2SFgvb2OKZI5Q33V1ztDvyzHgz3GKt4baV4RhbJj6kw9VPhazBjP1c6DFB japJ7PW2dpiiMvWWjIliI+oMg2aAs3uatvKvZAze9ETVqU988299Wo32onVTCq+YcIJV0W9LI2h uFSPBM2na/aDxzmn2Z8xHwrbry/TOZngRmwjbL3sbLr2l2947mlkAtJXN0uZr2QnfolbuvFr2nR 197lIm7ZIPkuoFIykk+MqOGpAD6X7kPZg1rQ/pAwdpVF0+DsBCZVZrVBo= X-Received: by 2002:a05:600c:1f87:b0:48a:53ea:13df with SMTP id 5b1f17b1804b1-48a83d66cfdmr33734885e9.2.1777542443755; Thu, 30 Apr 2026 02:47:23 -0700 (PDT) Received: from arrakeen.starnux.net ([2a01:e0a:106d:1080:52eb:f6ff:feb3:451a]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48a81b9493bsm48984745e9.0.2026.04.30.02.47.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 Apr 2026 02:47:23 -0700 (PDT) From: Neil Armstrong Date: Thu, 30 Apr 2026 11:47:16 +0200 Subject: [PATCH v2 2/2] backlight: Add SY7758 6-channel High Efficiency LED Driver support Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260430-topic-sm8650-ayaneo-pocket-s2-sy7758-v2-2-308140640de9@linaro.org> References: <20260430-topic-sm8650-ayaneo-pocket-s2-sy7758-v2-0-308140640de9@linaro.org> In-Reply-To: <20260430-topic-sm8650-ayaneo-pocket-s2-sy7758-v2-0-308140640de9@linaro.org> To: Lee Jones , Daniel Thompson , Jingoo Han , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Helge Deller Cc: dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, KancyJoe , Neil Armstrong X-Mailer: b4 0.15.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=10623; i=neil.armstrong@linaro.org; h=from:subject:message-id; bh=oLphRrYMc/i7SfmwTz1M2EuUqdpJ7AM0v6IBJaIdGes=; b=owEBbQKS/ZANAwAKAXfc29rIyEnRAcsmYgBp8yUoIF1IVAD+WKCk1PLMHraR26aN3AB9AE67gr2L BONsRneJAjMEAAEKAB0WIQQ9U8YmyFYF/h30LIt33NvayMhJ0QUCafMlKAAKCRB33NvayMhJ0Y77D/ 0ZSC96M1+wBb9Ix/L3K2H8VP1HmuMmIDGWIM+/vXOjOp/PMh/EjPC+uH+MQKPJN6jDaYYLqSEDlSKD gmSERMhi6N0AGv0NvmiAASXBJ2fjSKT9cCRKJmWSLytK9o9rXreSHYpqUx9ZdGH6+WviehfRUwcNAg ITGJBs+AugRBEmfkD+uQnehRzep2mQtbw/E6dpNpxPxJbkVEc9w/YhUZI3AocTiUBsFsG96LjKLMwW OD0iXQK9A1tb8zoFq3BOAT7nA1TQxSDhzla2TiMHiMq+xJFALLfYV3b1lfglkBEE+0HjQ85VtOu7zO YijnUCkoacdB5kcamrEjjiO9HnB9qo2/Mtxl9zQUUW9oLXz3KlIELy2gHftv+x6F8TjHEy2kyeBPNr U+mqOAA4gfLlFAazELGrjUOxvxOKz/cV8PW0aXA+Y18P4FE8bnicT2+JMst5MhbFOxchi85BoyNFl+ v48sCBVlBDMgfOtjTTkWj55sETlJ6O3irA+fEgMNz8ZcCjkuVsGY7AkCtBR+RXRuHnbMSv/23my9wg ntx8TVw3rj9/M6FGnMS3hiY+2iS+rjDTkgoCQCyMpRX7AzlhnJ6Wx6ANVsyTTHxklT7a7cCWP+8l4b kYCyhk/fsgJRqti0HRObx9TijfcpaPhHCjLcssxyXmOkLL9r8sqFD60kx+zA== X-Developer-Key: i=neil.armstrong@linaro.org; a=openpgp; fpr=89EC3D058446217450F22848169AB7B1A4CFF8AE From: KancyJoe Implement support for the Silergy SY7758 6-channel High Efficiency LED Driver used for backlight brightness control in the Ayaneo Pocket S2 dual-DSI panel. Signed-off-by: Neil Armstrong Signed-off-by: KancyJoe --- drivers/video/backlight/Kconfig | 8 + drivers/video/backlight/Makefile | 1 + drivers/video/backlight/sy7758.c | 311 +++++++++++++++++++++++++++++++++++= ++++ 3 files changed, 320 insertions(+) diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kcon= fig index a7a3fbaf7c29..052ac80c8213 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -207,6 +207,14 @@ config BACKLIGHT_KTZ8866 Say Y to enable the backlight driver for the Kinetic KTZ8866 found in Xiaomi Mi Pad 5 series. =20 +config BACKLIGHT_SY7758 + tristate "Backlight Driver for Silergy SY7758" + depends on I2C + select REGMAP_I2C + help + Say Y to enable the backlight driver for the Silergy SY7758 + backlight controller found in Ayaneo Socket S2. + config BACKLIGHT_LM3533 tristate "Backlight Driver for LM3533" depends on MFD_LM3533 diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Mak= efile index 794820a98ed4..39ef588b1cf2 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -56,6 +56,7 @@ obj-$(CONFIG_BACKLIGHT_PWM) +=3D pwm_bl.o obj-$(CONFIG_BACKLIGHT_QCOM_WLED) +=3D qcom-wled.o obj-$(CONFIG_BACKLIGHT_RT4831) +=3D rt4831-backlight.o obj-$(CONFIG_BACKLIGHT_SAHARA) +=3D kb3886_bl.o +obj-$(CONFIG_BACKLIGHT_SY7758) +=3D sy7758.o obj-$(CONFIG_BACKLIGHT_SKY81452) +=3D sky81452-backlight.o obj-$(CONFIG_BACKLIGHT_TPS65217) +=3D tps65217_bl.o obj-$(CONFIG_BACKLIGHT_WM831X) +=3D wm831x_bl.o diff --git a/drivers/video/backlight/sy7758.c b/drivers/video/backlight/sy7= 758.c new file mode 100644 index 000000000000..9b2d3bbb4ded --- /dev/null +++ b/drivers/video/backlight/sy7758.c @@ -0,0 +1,311 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Silergy SY7758 6-channel High Efficiency LED Driver + * + * Copyright (C) 2025 Kancy Joe + * Copyright (C) 2026 Linaro Limited + * Author: Neil Armstrong + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DEFAULT_BRIGHTNESS 1024 +#define MAX_BRIGHTNESS 4080 +#define REG_MAX 0xAE + +/* Registers */ +#define REG_BRT_8BIT 0x00 +#define REG_DEV_CTL 0x01 +#define REG_STATUS 0x02 +#define REG_DEV_ID 0x03 +#define REG_DIRECT_CTL 0x04 +#define REG_STATUS2 0x05 +#define REG_BRT_12BIT_L 0x10 +#define REG_BRT_12BIT_H 0x11 +#define REG_LED_ENABLE 0x16 + +/* OTP memory */ +#define REG_OTP_CFG98 0x98 +#define REG_OTP_CFG9E 0x9E +#define REG_OTP_CFG0 0xA0 +#define REG_OTP_CFG1 0xA1 +#define REG_OTP_CFG2 0xA2 +#define REG_OTP_CFG3 0xA3 +#define REG_OTP_CFG4 0xA4 +#define REG_OTP_CFG5 0xA5 +#define REG_OTP_CFG6 0xA6 +#define REG_OTP_CFG7 0xA7 +#define REG_OTP_CFG9 0xA9 +#define REG_OTP_CFGA 0xAA +#define REG_OTP_CFGE 0xAE + +/* Fields */ +#define BIT_DEV_CTL_FAST BIT(7) +#define MSK_DEV_CTL_BRT_MODE GENMASK(2, 1) +#define BIT_DEV_CTL_BL_CTLB BIT(0) + +#define BIT_STATUS_OPEN BIT(7) +#define BIT_STATUS_SHORT BIT(6) +#define BIT_STATUS_VREF_OK BIT(5) +#define BIT_STATUS_VBST_OK BIT(4) +#define BIT_STATUS_OVP BIT(3) +#define BIT_STATUS_OCP BIT(2) +#define BIT_STATUS_TSD BIT(1) +#define BIT_STATUS_UVLO BIT(0) + +#define MSK_DIRECT_CTL_OUT GENMASK(5, 0) + +#define BIT_STATUS2_OCP50MS_LATCH BIT(0) +#define BIT_STATUS2_OCP2 BIT(0) + +#define MSK_BRT_12BIT_L GENMASK(7, 0) +#define MSK_BRT_12BIT_H GENMASK(3, 0) +#define MSK_LED_ENABLE GENMASK(5, 0) + +#define BIT_CFG98_IBST_LIM_2X BIT(7) +#define BIT_CFG98_A0_FSETB BIT(0) + +#define BIT_CFG9E_VBST_RANGE BIT(5) +#define MSK_CFG9E_HEADROOM_OFFSET GENMASK(3, 0) + +#define MSK_CFG0_CURRENT_LOW GENMASK(7, 0) + +#define BIT_CFG1_PDET_STDBY BIT(7) +#define MSK_CFG1_CURRENT_MAX GENMASK(6, 4) +#define MSK_CFG1_CURRENT_HIGH GENMASK(3, 0) + +#define BIT_CFG2_UVLO_EN BIT(5) +#define BIT_CFG2_UVLO_TH BIT(4) +#define BIT_CFG2_BL_ON BIT(3) +#define BIT_CFG2_ISET_EN BIT(2) +#define BIT_CFG2_BST_ESET_EN BIT(1) + +#define MSK_CFG3_SLOPE GENMASK(6, 4) +#define MSK_CFG3_FILTER GENMASK(3, 2) +#define MSK_CFG3_PWM_INPUT_HYSTERESIS GENMASK(1, 0) +#define MSK_CFG4_PWM_TO_I_TH GENMASK(7, 4) + +#define BIT_CFG5_PWM_DIRECT BIT(7) +#define MSK_CFG5_PS_MODE GENMASK(6, 4) +#define MSK_CFG5_PWM_FREQ GENMASK(3, 0) + +#define MSK_CFG6_BST_FREQ GENMASK(7, 6) +#define MSK_CFG6_VBST GENMASK(5, 0) + +#define BIT_CFG7_EN_DRV3 BIT(5) +#define BIT_CFG7_EN_DRV2 BIT(4) +#define MSK_CFG7_IBST_LIM GENMASK(1, 0) + +#define MSK_CFG9_VBST_MAX GENMASK(7, 5) +#define BIT_CFG9_JUMP_EN BIT(4) +#define MSK_CFG9_JUMP_TH GENMASK(3, 2) +#define MSK_CFG9_JUMP_VOLTAGE GENMASK(1, 0) + +#define BIT_CFGA_SSCLK_EN BIT(7) +#define BIT_CFGA_ADAPTIVE BIT(3) +#define MSK_CFGA_DRIVER_HEADROOM GENMASK(2, 0) +#define MSK_CFGE_STEP_UP GENMASK(7, 6) +#define MSK_CFGE_STEP_DN GENMASK(5, 4) +#define MSK_CFGE_LED_FAULT_TH GENMASK(3, 2) +#define MSK_CFGE_LED_COMP_HYST GENMASK(1, 0) + +struct sy7758 { + struct i2c_client *client; + struct regmap *regmap; + struct gpio_desc *gpio; + struct backlight_device *bl; +}; + +static const struct regmap_config sy7758_regmap_config =3D { + .reg_bits =3D 8, + .val_bits =3D 8, + .max_register =3D REG_MAX, +}; + +static int sy7758_backlight_update_status(struct backlight_device *backlig= ht_dev) +{ + struct sy7758 *sydev =3D bl_get_data(backlight_dev); + unsigned int brightness =3D backlight_get_brightness(backlight_dev); + int ret; + + ret =3D regmap_write(sydev->regmap, REG_BRT_12BIT_L, + FIELD_PREP(MSK_BRT_12BIT_L, + brightness & 0xff)); + if (ret) + return ret; + + ret =3D regmap_write(sydev->regmap, REG_BRT_12BIT_H, + FIELD_PREP(MSK_BRT_12BIT_H, + (brightness >> 8) & 0xf)); + if (ret) + return ret; + + return 0; +} + +static const struct backlight_ops sy7758_backlight_ops =3D { + .options =3D BL_CORE_SUSPENDRESUME, + .update_status =3D sy7758_backlight_update_status, +}; + +static int sy7758_init(struct sy7758 *sydev) +{ + int ret =3D 0; + + ret =3D regmap_write(sydev->regmap, REG_DEV_CTL, + BIT_DEV_CTL_FAST | BIT_DEV_CTL_BL_CTLB | + FIELD_PREP(MSK_DEV_CTL_BRT_MODE, 2)); + if (ret) + return ret; + + ret =3D regmap_write(sydev->regmap, REG_BRT_12BIT_L, + FIELD_PREP(MSK_BRT_12BIT_L, + DEFAULT_BRIGHTNESS & 0xff)); + if (ret) + return ret; + + ret =3D regmap_write(sydev->regmap, REG_BRT_12BIT_H, + FIELD_PREP(MSK_BRT_12BIT_H, + (DEFAULT_BRIGHTNESS >> 8))); + if (ret) + return ret; + + ret =3D regmap_write(sydev->regmap, REG_OTP_CFG5, + FIELD_PREP(MSK_CFG5_PS_MODE, 6) | + FIELD_PREP(MSK_CFG5_PWM_FREQ, 4)); + if (ret) + return ret; + + ret =3D regmap_write(sydev->regmap, REG_OTP_CFG0, + FIELD_PREP(MSK_CFG0_CURRENT_LOW, 85)); + if (ret) + return ret; + + ret =3D regmap_write(sydev->regmap, REG_OTP_CFG1, + BIT_CFG1_PDET_STDBY | + FIELD_PREP(MSK_CFG1_CURRENT_MAX, 1) | + FIELD_PREP(MSK_CFG1_CURRENT_HIGH, 10)); + if (ret) + return ret; + + ret =3D regmap_write(sydev->regmap, REG_OTP_CFG9, + FIELD_PREP(MSK_CFG9_VBST_MAX, 4)); + if (ret) + return ret; + + ret =3D regmap_write(sydev->regmap, REG_OTP_CFG2, + BIT_CFG2_BL_ON | BIT_CFG2_UVLO_EN); + if (ret) + return ret; + + return 0; +} + +static int sy7758_probe(struct i2c_client *client) +{ + struct backlight_properties props =3D { }; + struct device *dev =3D &client->dev; + struct sy7758 *sydev; + unsigned int dev_id; + int ret; + + sydev =3D devm_kzalloc(dev, sizeof(*sydev), GFP_KERNEL); + if (!sydev) + return -ENOMEM; + + i2c_set_clientdata(client, sydev); + + /* Initialize regmap */ + sydev->client =3D client; + sydev->regmap =3D devm_regmap_init_i2c(client, &sy7758_regmap_config); + if (IS_ERR(sydev->regmap)) + return dev_err_probe(dev, PTR_ERR(sydev->regmap), + "failed to init regmap\n"); + + /* Get and enable regulators */ + ret =3D devm_regulator_get_enable(dev, "vddio"); + if (ret) + return dev_err_probe(dev, ret, "failed to get regulator\n"); + + usleep_range(100, 200); + + /* Get enable GPIO and set to high */ + sydev->gpio =3D devm_gpiod_get(dev, "enable", GPIOD_OUT_HIGH); + if (IS_ERR(sydev->gpio)) + return dev_err_probe(dev, PTR_ERR(sydev->gpio), + "failed to get enable GPIO\n"); + + /* Let some time for HW to settle */ + usleep_range(10000, 11000); + + /* try read and check device id */ + ret =3D regmap_read(sydev->regmap, REG_DEV_ID, &dev_id); + if (ret < 0) + return dev_err_probe(dev, ret, "failed to read device id\n"); + if (dev_id !=3D 0x63) { + dev_err(dev, "unexpected device id: 0x%02x\n", dev_id); + return -ENODEV; + } + + /* Initialize and set default brightness */ + ret =3D sy7758_init(sydev); + if (ret) + return ret; + + props.type =3D BACKLIGHT_RAW; + props.max_brightness =3D MAX_BRIGHTNESS; + props.brightness =3D DEFAULT_BRIGHTNESS; + props.scale =3D BACKLIGHT_SCALE_LINEAR; + + sydev->bl =3D devm_backlight_device_register(dev, "sy7758-backlight", + dev, sydev, &sy7758_backlight_ops, + &props); + if (IS_ERR(sydev->bl)) + return dev_err_probe(dev, PTR_ERR(sydev->bl), + "failed to register backlight device\n"); + + return backlight_update_status(sydev->bl); +} + +static void sy7758_remove(struct i2c_client *client) +{ + struct sy7758 *sydev =3D i2c_get_clientdata(client); + + backlight_disable(sydev->bl); +} + +static const struct i2c_device_id sy7758_ids[] =3D { + { "sy7758" }, + { } +}; +MODULE_DEVICE_TABLE(i2c, sy7758_ids); + +static const struct of_device_id sy7758_match_table[] =3D { + { .compatible =3D "silergy,sy7758", }, + { }, +}; +MODULE_DEVICE_TABLE(of, sy7758_match_table); + +static struct i2c_driver sy7758_driver =3D { + .driver =3D { + .name =3D "sy7758", + .of_match_table =3D sy7758_match_table, + }, + .probe =3D sy7758_probe, + .remove =3D sy7758_remove, + .id_table =3D sy7758_ids, +}; + +module_i2c_driver(sy7758_driver); + +MODULE_DESCRIPTION("Silergy SY7758 Backlight Driver"); +MODULE_AUTHOR("Kancy Joe "); +MODULE_LICENSE("GPL"); --=20 2.34.1