From nobody Sun Feb 8 11:04:53 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 576CD215F49; Mon, 17 Feb 2025 13:08:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739797692; cv=none; b=F5wDGWtRWytb+SDfkVn/PMcG/C7iBDf2Dupj1wX9Ngj2kVc7CASvAbYS+WDQHzJqzfAx+z4N5meW/ncYThKbxAnZ9XoRZr7kqqMEkJ1s0WlT9ICLLbQnohLhQ2Ui2Dovq3bNWhcF0c7wDsXj6iR2gAxpVrL7Lq9ql/tN4qVxyg8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739797692; c=relaxed/simple; bh=TRuesCIASsENowkyLfM2C67vODr26gLW9azX9UwdM3c=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=LoMIZMtUvwO35VGCcjf7fGi/hK+5302mMOWyjynKkHTcFssrvRr5ZMOb4YlyijidULsn8dnLNA4VHTl2NWhjjXdP6tcy//3adsBjp5nktEyjuNZ9VPHM5Vb6+5K/dSXvF2jOglwKyWIRJITkEtQzMQBmNOU7nsW91QYRS86cYpA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=k8RXlzdF; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="k8RXlzdF" Received: by smtp.kernel.org (Postfix) with ESMTPS id E0138C4CEE2; Mon, 17 Feb 2025 13:08:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1739797692; bh=TRuesCIASsENowkyLfM2C67vODr26gLW9azX9UwdM3c=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=k8RXlzdFhbS1/8QLQFRhux/AppJcJ6966iFhCyNP69b8K21nF1ZWolxY7zRYIgxrL MNEcwbDqeAb5m+dsBNRJ/IAfa7MTYsip3eFs1D9jHZSGSDDrxu0kINyIrokYJa2klJ 1H3/99MDVSLUHPeYydA+bpe2YmDy8QQ16r5eNPw9kKxc7epbPCLV4kYizc7MB4qkuS Kw6l06vJoN3xQ9Ezq2CtsumlrmWjCkgdedUgAfykGA/QmT7zIV3Mp3wJOB/E4JVhba fqLPFMkZ8+TSv690LKNHObopWDorkslZcRsIytAJolY9G9F78HHfD8UKHnmJuQdSL4 Pwc7lQ3cNJidA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id C7FA7C021A9; Mon, 17 Feb 2025 13:08:11 +0000 (UTC) From: =?utf-8?q?T=C3=B3th_J=C3=A1nos_via_B4_Relay?= Date: Mon, 17 Feb 2025 14:07:51 +0100 Subject: [PATCH 1/2] drivers: gpio: Add support for PCF8574T. 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: <20250217-gpio-pcf8574t-v1-1-137e140df5fc@gmail.com> References: <20250217-gpio-pcf8574t-v1-0-137e140df5fc@gmail.com> In-Reply-To: <20250217-gpio-pcf8574t-v1-0-137e140df5fc@gmail.com> To: Linus Walleij , Bartosz Golaszewski , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Laurent Pinchart Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, =?utf-8?q?T=C3=B3th_J=C3=A1nos?= X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1739797690; l=1707; i=gomba007@gmail.com; s=20230706; h=from:subject:message-id; bh=NOilr3HjpQ2oJwKALY56/6mHBbZIdGAWuyLI56+xsUI=; b=sKvDFTQlBO+NeSz7z25NPSzCWoyS+E5DMNcVsDhEZ2ucbeo25xuwX7zPYjlCj2BtSTvp9VAlo wTn92AND2faCHsd5CjQONktugAJCSsLWoG7NodqPsx3MhLfrSobWM27 X-Developer-Key: i=gomba007@gmail.com; a=ed25519; pk=iY9MjPCbud82ULS2PQJIq3QwjKyP/Sg730I6T2M8Y5U= X-Endpoint-Received: by B4 Relay for gomba007@gmail.com/20230706 with auth_id=60 X-Original-From: =?utf-8?q?T=C3=B3th_J=C3=A1nos?= Reply-To: gomba007@gmail.com From: T=C3=B3th J=C3=A1nos Add support for the PCF8574T 8-bit I2C I/O expander. The driver is tested with: + tools/lsgpio + tools/gpio-hammer + some LEDs [1] https://www.nxp.com/docs/en/data-sheet/PCF8574_PCF8574A.pdf Signed-off-by: T=C3=B3th J=C3=A1nos --- drivers/gpio/Kconfig | 2 +- drivers/gpio/gpio-pcf857x.c | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 98b4d1633b25..d7cdc3cc1b00 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -1193,7 +1193,7 @@ config GPIO_PCF857X Most of these parts are from NXP, though TI is a second source for some of them. Compatible models include: =20 - 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, + 8 bits: pcf8574, pcf8574a, pcf8574t, pca8574, pca8574a, pca9670, pca9672, pca9674, pca9674a, max7328, max7329 =20 diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c index 7c57eaeb0afe..2464c527a4e8 100644 --- a/drivers/gpio/gpio-pcf857x.c +++ b/drivers/gpio/gpio-pcf857x.c @@ -20,6 +20,7 @@ static const struct i2c_device_id pcf857x_id[] =3D { { "pcf8574", 8 }, { "pcf8574a", 8 }, + { "pcf8574t", 8 }, { "pca8574", 8 }, { "pca9670", 8 }, { "pca9672", 8 }, @@ -38,6 +39,7 @@ MODULE_DEVICE_TABLE(i2c, pcf857x_id); static const struct of_device_id pcf857x_of_table[] =3D { { .compatible =3D "nxp,pcf8574", (void *)8 }, { .compatible =3D "nxp,pcf8574a", (void *)8 }, + { .compatible =3D "nxp,pcf8574t", (void *)8 }, { .compatible =3D "nxp,pca8574", (void *)8 }, { .compatible =3D "nxp,pca9670", (void *)8 }, { .compatible =3D "nxp,pca9672", (void *)8 }, --=20 2.34.1 From nobody Sun Feb 8 11:04:53 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5779021B8E0; Mon, 17 Feb 2025 13:08:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739797692; cv=none; b=EHN6TQ+TY11jbqh57+djbC+Z3o4M8TEx0KiPspRFNMsOYDBBy04rt0jxfmsU1gH2CeHYnlLkmkgs3PkurRnXhqK4A6pSb8bXiNoSRy3At9k83YwDmV8QUS39zcfFo6BcH2aNEVYzqBO1TzreNk4vK3yDW9BwZZGZ4Yf6C4zKSdA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739797692; c=relaxed/simple; bh=BodtHJ757N8P2h1BykC4Mk8zepWOwp559FjBvN7beiQ=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=laz5EcM2F1k9zkk8f/PCzajp26ObmBg83CZEFRh3Tox/EJUU/3L7CDE8ZOySvvnkoBtFFgh5OS8t9BA37pvuTrZqSLLHlAHcCfsM4lUmBNQ41nKJjp5pxLirH2d8CnknBDn+KTxsekAJQEwH/gCrQGK8AMYkcyPI1A7RiwkPkac= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=pxbNDskE; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="pxbNDskE" Received: by smtp.kernel.org (Postfix) with ESMTPS id EC53BC4CEE8; Mon, 17 Feb 2025 13:08:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1739797692; bh=BodtHJ757N8P2h1BykC4Mk8zepWOwp559FjBvN7beiQ=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=pxbNDskEbuqE+53ni6AJuIq0kIYzIh4MjrP/m311Kl04vUcO27X87AM9bsdhehkO0 uMgxqkJiABV/efCmtUxyPW/Rbf3ZbYMxMnQLALYAFVy+8iJB+AB7kyHBZgiKcLoOQ9 Z5S3ndLIPrjBaR8omJ/VT03fHdT6cHrH440q00JrcPRubCpYotXjfRHPgcYMywUjQh PSwmiLAcLLX4Fm5bTB5DIMDhAWP5CBF2i7CMsJAepPlgIlXd1xJP6mRDA2o9lEqU00 HuCFLLPDlvxxxOuMCbAr9nE8XNC5YbBHDty1KIdMbX6KwCq8pfkqo+N0uZC3eWk4i0 kfxHRbqY0YT8A== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id D9E28C021AD; Mon, 17 Feb 2025 13:08:11 +0000 (UTC) From: =?utf-8?q?T=C3=B3th_J=C3=A1nos_via_B4_Relay?= Date: Mon, 17 Feb 2025 14:07:52 +0100 Subject: [PATCH 2/2] dt-bindings: gpio: Add support for PCF8574T. 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: <20250217-gpio-pcf8574t-v1-2-137e140df5fc@gmail.com> References: <20250217-gpio-pcf8574t-v1-0-137e140df5fc@gmail.com> In-Reply-To: <20250217-gpio-pcf8574t-v1-0-137e140df5fc@gmail.com> To: Linus Walleij , Bartosz Golaszewski , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Laurent Pinchart Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, =?utf-8?q?T=C3=B3th_J=C3=A1nos?= X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1739797690; l=668; i=gomba007@gmail.com; s=20230706; h=from:subject:message-id; bh=B6J4izNH3fp6JISZ2syXUSUwyTFFQEArfTvkcwoUcp4=; b=yLBLbSdGcT6u1xG8ikX06I9UIbLWAP3E3AI1PGayeGeSFpL5P9PNIvj/yFxJSFXOVzE7nyU/d 4Ls+m2twM8GAr6xHtu7zw43GjKDEDNiTOWiXl1ULWXqvRSQzEMZVvxA X-Developer-Key: i=gomba007@gmail.com; a=ed25519; pk=iY9MjPCbud82ULS2PQJIq3QwjKyP/Sg730I6T2M8Y5U= X-Endpoint-Received: by B4 Relay for gomba007@gmail.com/20230706 with auth_id=60 X-Original-From: =?utf-8?q?T=C3=B3th_J=C3=A1nos?= Reply-To: gomba007@gmail.com From: T=C3=B3th J=C3=A1nos Add the necessary documentation for PCF8574T. Signed-off-by: T=C3=B3th J=C3=A1nos --- Documentation/devicetree/bindings/gpio/nxp,pcf8575.yaml | 1 + 1 file changed, 1 insertion(+) diff --git a/Documentation/devicetree/bindings/gpio/nxp,pcf8575.yaml b/Docu= mentation/devicetree/bindings/gpio/nxp,pcf8575.yaml index 3718103e966a..cbe4cf96e942 100644 --- a/Documentation/devicetree/bindings/gpio/nxp,pcf8575.yaml +++ b/Documentation/devicetree/bindings/gpio/nxp,pcf8575.yaml @@ -34,6 +34,7 @@ properties: - nxp,pca9675 - nxp,pcf8574 - nxp,pcf8574a + - nxp,pcf8574t - nxp,pcf8575 =20 reg: --=20 2.34.1