From patchwork Tue Mar 15 21:19:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?TsOtY29sYXMgRi4gUi4gQS4gUHJhZG8=?= X-Patchwork-Id: 552054 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AF1D7C4332F for ; Tue, 15 Mar 2022 21:20:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245395AbiCOVWD (ORCPT ); Tue, 15 Mar 2022 17:22:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49644 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351938AbiCOVWD (ORCPT ); Tue, 15 Mar 2022 17:22:03 -0400 Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [46.235.227.227]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EDBF15BD13; Tue, 15 Mar 2022 14:20:50 -0700 (PDT) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: nfraprado) with ESMTPSA id 880151F42BBE DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1647379249; bh=3ckuvqWLQ1qmzoI6HPHe+BcexrvaTRmXFylbDp1AC3I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fiIGSmRYBQRNzj3mgKPV/UTBh7RiXSNivNo34MoxKqEfCQDberhKZkx5V3hpbATJ3 hX2IB1KUOeNwc/jmKawertc+hsCDJhhTWmNvTwM6yHM2umYnoOUqjCcpevWSxUegjK sJydYSemDm5kuiyd7mqxabk6lpX943D6a/l2YoFUMpRJvn+46Oz6CE36MxuGzkWQjS S/ZbGXyvLMNBCwfcFcl0haRTEU1JgebWwVluVARlQu9Ps72xPRUTjy6SECtEK0FUfy vez6cjtUaOU/VEsiVD8JUv3hOOZRItzn+FXUjHBSlPzTTYypNBZ4lt4pWnNeUZBvOg IjUrPQllOg00w== From: =?utf-8?b?TsOtY29sYXMgRi4gUi4gQS4gUHJhZG8=?= To: Linus Walleij , Rob Herring Cc: kernel@collabora.com, AngeloGioacchino Del Regno , =?utf-8?b?TsOtY29sYXMgRi4gUi4gQS4gUHJhZG8=?= , Matthias Brugger , Sean Wang , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org Subject: [PATCH v1 2/4] dt-bindings: pinctrl: mt8192: Add mediatek,drive-strength-adv property Date: Tue, 15 Mar 2022 17:19:34 -0400 Message-Id: <20220315211936.442708-3-nfraprado@collabora.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220315211936.442708-1-nfraprado@collabora.com> References: <20220315211936.442708-1-nfraprado@collabora.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Add the mediatek,drive-strength-adv property to the pinctrl-mt8192 dt-binding to allow further drive current adjustments for I2C nodes on MT8192. It is the same as in mt8183-pinctrl. Signed-off-by: Nícolas F. R. A. Prado Reviewed-by: AngeloGioacchino Del Regno --- .../bindings/pinctrl/pinctrl-mt8192.yaml | 26 +++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8192.yaml b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8192.yaml index d63e23d9ed16..b52d8d0eb2d0 100644 --- a/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8192.yaml +++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8192.yaml @@ -78,6 +78,32 @@ patternProperties: dt-bindings/pinctrl/mt65xx.h. It can only support 2/4/6/8/10/12/14/16mA in mt8192. enum: [2, 4, 6, 8, 10, 12, 14, 16] + mediatek,drive-strength-adv: + description: | + Describe the specific driving setup property. + For I2C pins, the existing generic driving setup can only support + 2/4/6/8/10/12/14/16mA driving. But in specific driving setup, they + can support 0.125/0.25/0.5/1mA adjustment. If we enable specific + driving setup, the existing generic setup will be disabled. + The specific driving setup is controlled by E1E0EN. + When E1=0/E0=0, the strength is 0.125mA. + When E1=0/E0=1, the strength is 0.25mA. + When E1=1/E0=0, the strength is 0.5mA. + When E1=1/E0=1, the strength is 1mA. + EN is used to enable or disable the specific driving setup. + Valid arguments are described as below: + 0: (E1, E0, EN) = (0, 0, 0) + 1: (E1, E0, EN) = (0, 0, 1) + 2: (E1, E0, EN) = (0, 1, 0) + 3: (E1, E0, EN) = (0, 1, 1) + 4: (E1, E0, EN) = (1, 0, 0) + 5: (E1, E0, EN) = (1, 0, 1) + 6: (E1, E0, EN) = (1, 1, 0) + 7: (E1, E0, EN) = (1, 1, 1) + So the valid arguments are from 0 to 7. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1, 2, 3, 4, 5, 6, 7] + bias-pull-down: true bias-pull-up: true