From patchwork Wed Feb 26 14:08:20 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Andr=C3=A9_Draszik?= X-Patchwork-Id: 869204 Received: from mail-ej1-f52.google.com (mail-ej1-f52.google.com [209.85.218.52]) (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 7927021D3C4 for ; Wed, 26 Feb 2025 14:08:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.52 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740578906; cv=none; b=dS5t11oCqkm1mCx3Ed/TtFX35SKow+RtGylmf8FqJe/fbtDVfnv9boiQRd2br8OZvc0WITqiw4cp1Pm6PoovA8AIvQPLJYxdG/3O5wxxK2Uldf/A50ioUZD68DkCMwBE8MUQ4QnNt7jgQKOmNHt5blAoReB2OgreD6gcNKRJfiE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740578906; c=relaxed/simple; bh=P4n2TUurAZ0QjjR+H15n7mDXmaltx5kef1Mee5VWzEU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=aWKqmRWQ1IJNwG0Ze6n1wd2Q9coYGjqIQbm0B8gUpbEqROqw8lIkk4+oDqjp0/jCdVvCXtNBFN3JPmXi18qGUsueaSLeuyWoyg0BZy6aNW5c0J0mtlYB3D06qqjxX7JM1EQDMfoRXH6R1DNAnlK2SK1lB9istxtrGarlUNkEIA4= 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=Tiix1jWe; arc=none smtp.client-ip=209.85.218.52 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="Tiix1jWe" Received: by mail-ej1-f52.google.com with SMTP id a640c23a62f3a-abb9709b5b5so1242916766b.2 for ; Wed, 26 Feb 2025 06:08:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1740578903; x=1741183703; 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=ptWMUTZMUOXDkynnwEpEC1SXLl/PZJE3+R5Z2ydqVns=; b=Tiix1jWemSfLe80DOWkD8QDtI0y59joeUEOZygHzgOYX63vDp7Q3cBvRTExqrPlKi5 B8bKl29N+f27RouT0O14dYWmpP2Z8linkBw/j+WGO5AwrBm5eQYv3RRgK3nyejpSwJMc a3IWtYhjafz669eiv1ABEEkZfZhx0N1AMkLMdrDBZadkkLm6r0gFG9gz+qckY+Y5qidh cMAxU+cm4U/tjVyQuiqxq6sRSBV74EiHohH9SPQqz+mzpalwJ6JN9Hy7tZzjR6gSu0el 8cvQOHBSAcFWjeYsAZAHGfI2M7xjLz50rf/sAB3Ui/YIn5D4FhSXGI1+j/OsYlIpBXOW +9ug== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1740578903; x=1741183703; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ptWMUTZMUOXDkynnwEpEC1SXLl/PZJE3+R5Z2ydqVns=; b=rIijr/nh+bkBON08B8n5awY/WWqysCV9CRLtl6zopxPaSBoIgxasOmfGeRTqncZVyy kB2V3UhIPFKgQ7TydB5eGMZ50mqxkqjjA8qhNQBtdI9o6kOu8Pt3xG0OxnR6zIlqQwE8 NRG7eUXDJBhL9IMUK/SddzRnFt5ABy2jJgmnYNuC3kzEySxaJsS0txT2TevTlql4aZtx zM9KVmslCd0sS6sXl8VJ++WyaB5O4GodIC1A8N7lcBJz+GHH2ROF1eozDhao3V2QF5xE NKiRrSKIO8H1fmXcBM3act+lDBgrHkeLbhFCKIqjeKSwGwr5sqBV0GodU0l8WwjnpSs4 34LA== X-Forwarded-Encrypted: i=1; AJvYcCV6iXdUUURu1EJRPd6GeI2sBM9eadDIRjI9neehP1U+Q41UWLtirhkKifynCBXTxkObZo95a96npA==@vger.kernel.org X-Gm-Message-State: AOJu0YzYobBmJVRihecunkeaGycUwGOVNalh6faV0i62EFzwko6Oormh gYI4ppj/w/KTALW9XPHj9F0XjJ1cR8XDkkQyJA72GwCP63lCR6ZxINl6pwLy9cM= X-Gm-Gg: ASbGncvMhYwkee8SMcZvJwLHeKKFUCW3EV+ev7GTVVoI2CRE55WuBqb/FWw+2xPbN5x U/KE+DrnHqgcRQ3t70vgE7UX9BGR2Yc8qppMcuhDyEZq+vctXDmBGTiijGnWsRksbEJ7F54PXbJ MateYY5Vf6Ow8OzfwyEsHEBq0fT/taBUpbNO+XX1NdXVoQJXGpqRBOhYqGiOFaGRhSyR1IAqXPP COs4MUGqzYm7k+5ID003yzFQohBERDemGre3nr4StzP6kuttAZqte0jYWnELbdwSUdA1Hxxdrrl CKn6YCY2vHvgqcrLV/Re6A0F4ax2GIpxPuI8OJdPwaWZEpEzaxVSsYcfkJtWhgWCYNx9u1wz8Yc 1lG+7jqlyoQ== X-Google-Smtp-Source: AGHT+IGalEUuTDwYDfunN57TQDxRb+0j8EpUzGDr7qDDi15A5nUiai0Xcy6PUoLEPI47zu9GGOn6VQ== X-Received: by 2002:a17:907:6d27:b0:ab7:e567:4fe8 with SMTP id a640c23a62f3a-abed0d60b6fmr922741866b.25.1740578902612; Wed, 26 Feb 2025 06:08:22 -0800 (PST) Received: from puffmais.c.googlers.com (30.171.91.34.bc.googleusercontent.com. [34.91.171.30]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-abed20b6024sm330157566b.181.2025.02.26.06.08.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Feb 2025 06:08:22 -0800 (PST) From: =?utf-8?q?Andr=C3=A9_Draszik?= Date: Wed, 26 Feb 2025 14:08:20 +0000 Subject: [PATCH 1/2] dt-bindings: reset: syscon-reboot: support reset modes Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250226-syscon-reboot-reset-mode-v1-1-91c1b62166ae@linaro.org> References: <20250226-syscon-reboot-reset-mode-v1-0-91c1b62166ae@linaro.org> In-Reply-To: <20250226-syscon-reboot-reset-mode-v1-0-91c1b62166ae@linaro.org> To: Sebastian Reichel , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Peter Griffin , Tudor Ambarus , Will McVicker , kernel-team@android.com, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?q?Andr=C3=A9_Draszik?= X-Mailer: b4 0.14.2 Add support for specifying different register/mask/value combinations for different types of reset. In particular, update the binding to allow platforms to specify the following reset modes: soft, warm, cold, hard. Linux can perform different types of reset using its reboot= kernel command line argument, and some platforms also wish to reset differently based on whether or not e.g. contents of RAM should be retained across the reboot. The new properties match the existing properties, just prefixed with one of the reset modes mentioned above. Signed-off-by: André Draszik --- .../bindings/power/reset/syscon-reboot.yaml | 74 ++++++++++++++++++++++ 1 file changed, 74 insertions(+) diff --git a/Documentation/devicetree/bindings/power/reset/syscon-reboot.yaml b/Documentation/devicetree/bindings/power/reset/syscon-reboot.yaml index 19d3093e6cd2f7e39d94c56636dc202a4427ffc3..a34b1c08b7e0f34574a0257e13c02fceac0243ae 100644 --- a/Documentation/devicetree/bindings/power/reset/syscon-reboot.yaml +++ b/Documentation/devicetree/bindings/power/reset/syscon-reboot.yaml @@ -18,6 +18,11 @@ description: |+ parental dt-node. So the SYSCON reboot node should be represented as a sub-node of a "syscon", "simple-mfd" node. Though the regmap property pointing to the system controller node is also supported. + This also supports specification of separate sets of register/mask/value + pairs for different types of reset: cold, hard, soft and warm, using + the respective properties with the respective reset type prefix. If prefixed + properties are not specified for a reset type, the non-prefixed properties + will be used for that reset type. properties: compatible: @@ -49,12 +54,41 @@ properties: priority: default: 192 +patternProperties: + "^(cold|hard|soft|warm)-(mask|offset|value)$": + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Optional alternative offset / mask / value combinations for specific + reboot modes. The mask is optional. + + "^(cold|hard|soft|warm)-reg$": + description: + Optional alternative base address and size for the reboot register for + specific reboot modes. + oneOf: - required: - offset - required: - reg +dependencies: + cold-mask: [ cold-value ] + cold-offset: [ cold-value ] + cold-reg: [ cold-value ] + + hard-mask: [ hard-value ] + hard-offset: [ hard-value ] + hard-reg: [ hard-value ] + + soft-mask: [ soft-value ] + soft-offset: [ soft-value ] + soft-reg: [ soft-value ] + + warm-mask: [ warm-value ] + warm-offset: [ warm-value ] + warm-reg: [ warm-value ] + required: - compatible @@ -70,6 +104,46 @@ allOf: required: - value + - if: + required: + - cold-value + then: + oneOf: + - required: + - cold-offset + - required: + - cold-reg + + - if: + required: + - hard-value + then: + oneOf: + - required: + - hard-offset + - required: + - hard-reg + + - if: + required: + - soft-value + then: + oneOf: + - required: + - soft-offset + - required: + - soft-reg + + - if: + required: + - warm-value + then: + oneOf: + - required: + - warm-offset + - required: + - warm-reg + examples: - | reboot {