From patchwork Mon Apr 28 23:56:10 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ariel Simulevski X-Patchwork-Id: 885580 Received: from mail-ej1-f47.google.com (mail-ej1-f47.google.com [209.85.218.47]) (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 A3D0A193077 for ; Mon, 28 Apr 2025 23:56:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.47 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745884577; cv=none; b=mYu7W6cohWkCm1dYzmkbKve5M3hHgHL1JUD4gsHmaiDeJYd88NYaq3QTspwwP3PvMevGA1pT17A1sXcn0iHyqlqGwe1DK8UgDYik0TQN1dju6csFc4hCEl8TwVIreNYHcPATL26cV6n6qiY9vG+msD0wvGSfjoYKdEN2GOqvGeY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745884577; c=relaxed/simple; bh=bxmFw1R18RCWVmkLj5Gw+iQe32a7Ap/yaP+7IqnIbJU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Op7XFF2tTL8Xcjdt9boPJQ1mbeKKHCdrKmoZNCnRChglR45T0SGTfe7kP9puTMLHTkGJdyZI7eZbM3+s4hECL+XlI1yn0A/RQHR7i57efbNLLxMFYES7S+66p3yRuBqs2nyA4WYnch6esrbgLQAgzRCPlYgQDOiEYDkOaaTYugA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=simulevski.at; spf=pass smtp.mailfrom=simulevski.at; dkim=pass (2048-bit key) header.d=simulevski.at header.i=@simulevski.at header.b=Zh0zNXN6; arc=none smtp.client-ip=209.85.218.47 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=simulevski.at Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=simulevski.at Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=simulevski.at header.i=@simulevski.at header.b="Zh0zNXN6" Received: by mail-ej1-f47.google.com with SMTP id a640c23a62f3a-ac2c663a3daso1060947366b.2 for ; Mon, 28 Apr 2025 16:56:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=simulevski.at; s=google; t=1745884574; x=1746489374; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=wB66ToxGKEi9eBswU4ICqh+7barhwHPSPNy0x89YMy4=; b=Zh0zNXN6D5U4hIy3YZHGbFWQW1fbAcw9p9uNazDHQhHhs0VZkVhkyFuJI6pDUWsnSm sdMl6Jpp+ZLWy1cVViPoyt4dcAMRGy4Z8IKvmcF6QPypmx9+U+hBO9v+WASconf0+z+H IUxOKz7uLYZPnzMB/qEb1AkWKWCB+0O4h/dUhT0VTZSfLE661rAMwBak7YXgBm/tHtdA ioY48RsQ1Sh5QbXecud9cpMGDDcHLomMZNSmDZ0Dxl8OZf/ZU81HXq/mwrVDdgAP806w rHMpUSNqjA8bYK8PbDRRvuNB1Me5drtx8TkZIW6EpxUzIrvl6vIGlPipve3icde+5tZp LETg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1745884574; x=1746489374; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=wB66ToxGKEi9eBswU4ICqh+7barhwHPSPNy0x89YMy4=; b=lyQYHD6vo1S2XuVRI+kNze4KiBBwhh3pkLo/rf9MsOCUD68OPmRPTJNtcw/5NYfwFV YrrZIPqNkmRuEZBCbENDQDO7jG3PdGqPUn7bWAPkIIqkb6MgLrZIUJiaHyAICFzM95P5 x3by5cGMb6HdXLgSumwpU3rTzxdDAFdE1MlTZMFfj6NI8FfJqy/M/M8EJiSSQF1VxSut FLR/0iNyxQHR0SIhMcuAuDLdXACEZqG6TSj/CCDm+dgrQgkIdnoEOY9uHp0bpfODcqcG 8t+JqFb1WD6D7itKyW4Xl65sMuGWVFlV74pa/9rOD51Eg1GQcHBL57CthznIQnaepgo9 Lmzw== X-Gm-Message-State: AOJu0Yzt3oeB/WwdRJfTR/2rCyaZGb5No0JD7cbfKdj49scf7FeVWHjT SpniSZea056p7gSlY3sX4IpbhlMGSSPSjsRoQvyQKeoPkn+NNG7YZ6c18XK+ux14xIH6aJydNYN p0/bhdg== X-Gm-Gg: ASbGnctcFwdd7ncZM0M5SebAG+57G1Z6JwhAPweKEoj4luqhl3F90TUDwIeJx8GwRT9 HP4nlYHlKPtROVa7iQ0Fn4Bq2dntveCibjoEUgjg27IKL1PTfqviMq3YR23WQBo84sLXpUtEbnG DOPqKbLnNK632U/kyOJJOzw/56rdYuw7kDaLlPq5bRLSPcMJ8Gwrxf+sDViDxv7oNHXdKPjIW9l kR9DBHZq6BCRfgubsycri2i9LOqATs1khtUVj+Xcr69oBymQGYQ0n52rgisxZblfZspy85pxCYG IrtJobJhU2URRdX73TW9Djn46Tpmdytm+EtMMAJH7az60eYS/JgVqvOfo0M8THuUbT8= X-Google-Smtp-Source: AGHT+IHrWau5pzqlu8AZB408xcJLGbooNHtqSnUwY0qLzTMn1zlXklldf4GHYwIOxwVXsIAd1s9Zzg== X-Received: by 2002:a17:906:c153:b0:ace:31bf:30f3 with SMTP id a640c23a62f3a-ace84ad7e97mr958675166b.43.1745884573629; Mon, 28 Apr 2025 16:56:13 -0700 (PDT) Received: from fedora.home.simulevski.at ([91.65.134.65]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-acec3d78514sm68656966b.131.2025.04.28.16.56.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Apr 2025 16:56:13 -0700 (PDT) From: Ariel Simulevski To: andy@kernel.org Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, Ariel Simulevski Subject: [PATCH] pinctrl: intel: Document Tiger Lake reuse on some Alder Lake platforms Date: Tue, 29 Apr 2025 01:56:10 +0200 Message-ID: <20250428235610.11324-1-ariel@simulevski.at> X-Mailer: git-send-email 2.49.0 Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Some Alder Lake systems, such as those using the PixArt I2C touchpad (PIXA3848), reuse GPIO IP blocks similar to Tiger Lake. As a result, enabling CONFIG_PINCTRL_TIGERLAKE may be required for proper I2C device detection. Document this in the Kconfig help text to assist users encountering this issue. Link: https://bugzilla.kernel.org/show_bug.cgi?id=220056 Signed-off-by: Ariel Simulevski --- drivers/pinctrl/intel/Kconfig | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/pinctrl/intel/Kconfig b/drivers/pinctrl/intel/Kconfig index 248c2e558ff3..b8e1436b04f7 100644 --- a/drivers/pinctrl/intel/Kconfig +++ b/drivers/pinctrl/intel/Kconfig @@ -54,6 +54,11 @@ config PINCTRL_ALDERLAKE This pinctrl driver provides an interface that allows configuring of Intel Alder Lake PCH pins and using them as GPIOs. + Note: On some Alder Lake platforms, including systems with + the PixArt I2C touchpad (PIXA3848), the hardware reuses + Tiger Lake style GPIO blocks. For proper device detection, + enabling CONFIG_PINCTRL_TIGERLAKE may be necessary. + config PINCTRL_BROXTON tristate "Intel Broxton pinctrl and GPIO driver" select PINCTRL_INTEL