From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 E47292F12AE; Tue, 16 Jun 2026 18:04:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781633100; cv=none; b=e1IktI47knwAIKAFEKBAN+t3WlEyF4LZLgL+D4Er7/5G8NFKu58XVoDwLdVDS8iD+HWwTnnJeUZKIRHinI9uQyvnB6XUZaZeHIK0Moxsv1hILeXTggoECwLU335GnMsrq2y/6BlQ2lEI0Uc+bX6Zo5RENzQVco1i5oRQbBJIz6Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781633100; c=relaxed/simple; bh=N01r7CKQV3lIacPWEk/+Ra270VINeIa6rJLtAsjQbTg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=f/ka6iJ2FiuCkeC/5pR8tMxtewcfP3yd9jgMHx8hZUKA+W5nhk03/jNzTM1huoP+4hDOJ73a+G0rDbpdI/VRQRselqXlUjO0XTQ1Qx4bDr2cHzq8gAtGBk0edTaQj8woc2xRpYuw/1SMufFdVVTyCWQH/DtLWKcgOQaWsW7fKQ4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=U3Y+GpPS; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="U3Y+GpPS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CCD001F000E9; Tue, 16 Jun 2026 18:04:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781633099; bh=Pd/X8r/hAZ5u+XV1uWBJCvd0MtulQIHgX7x7kXCf+Pc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=U3Y+GpPSOrnshkZg4SzZsk2tVg6M0en1C8scpa39t5I+eoUlkks2EzJNeM7bbVU/q 8hTvVswQUt6pKXRTUebN1N11zmHeeZNWHzVGM790eMshjZsUvd7eaVI4h/E62UwaC0 dG4lyn0/Ma74ANor8NFnq2PKwY54LI4tsDEOAlrs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Carl Lee , Bartosz Golaszewski , Mark Pearson , Luca Stefani , David Heidelberg , Sasha Levin Subject: [PATCH 5.15 011/411] nfc: nxp-nci: i2c: use rising-edge IRQ on ACPI systems Date: Tue, 16 Jun 2026 20:24:09 +0530 Message-ID: <20260616145100.961007042@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616145100.376842714@linuxfoundation.org> References: <20260616145100.376842714@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Carl Lee [ Upstream commit f23bf992d65a42007c517b060ca35cebdea3525a ] Some ACPI-based platforms report incorrect IRQ trigger types (e.g. IRQF_TRIGGER_HIGH), which can lead to interrupt storms. Use the historically working rising-edge trigger on ACPI systems to avoid this regression. Device Tree-based systems continue to use the firmware-provided trigger type. Fixes: 57be33f85e36 ("nfc: nxp-nci: remove interrupt trigger type") Signed-off-by: Carl Lee Tested-by: Bartosz Golaszewski Reviewed-by: Bartosz Golaszewski Reviewed-by: Mark Pearson Tested-by: Mark Pearson Tested-by: Luca Stefani Link: https://patch.msgid.link/20260516-nfc-nxp-nci-i2c-restore-irq-trigger-fallback-v3-1-37ba4b6e9086@amd.com Signed-off-by: David Heidelberg Signed-off-by: Sasha Levin --- drivers/nfc/nxp-nci/i2c.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/drivers/nfc/nxp-nci/i2c.c b/drivers/nfc/nxp-nci/i2c.c index 22c498860c03d5..a0e665f958c4d5 100644 --- a/drivers/nfc/nxp-nci/i2c.c +++ b/drivers/nfc/nxp-nci/i2c.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -268,6 +269,7 @@ static int nxp_nci_i2c_probe(struct i2c_client *client, { struct device *dev = &client->dev; struct nxp_nci_i2c_phy *phy; + unsigned long irqflags; int r; if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { @@ -304,9 +306,26 @@ static int nxp_nci_i2c_probe(struct i2c_client *client, if (r < 0) return r; + /* + * ACPI platforms may report incorrect IRQ trigger types + * (e.g. level-high), which can lead to interrupt storms. + * + * Use the historically stable rising-edge trigger for ACPI devices. + * + * On non-ACPI systems (e.g. Device Tree), prefer the firmware- + * provided trigger type, falling back to rising-edge if not set. + */ + if (ACPI_COMPANION(dev)) { + irqflags = IRQF_TRIGGER_RISING; + } else { + irqflags = irq_get_trigger_type(client->irq); + if (!irqflags) + irqflags = IRQF_TRIGGER_RISING; + } + r = request_threaded_irq(client->irq, NULL, nxp_nci_i2c_irq_thread_fn, - IRQF_ONESHOT, + irqflags | IRQF_ONESHOT, NXP_NCI_I2C_DRIVER_NAME, phy); if (r < 0) nfc_err(&client->dev, "Unable to register IRQ handler\n"); -- 2.53.0