From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 829B8CA0ED1 for ; Mon, 18 Aug 2025 04:13:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=SKf+gTq+ieT3ixJm6yolOVcf/QeGWozpSj4zcFrpWbM=; b=vduj7pDi5zhRQW czGfEun2mOKA+tHMjLXnow4GsOgUijAjjLMfzvddNxSgHWZ6wfYYmXqwmtCiHFamfsxs/Yfxd6KB7 CBhc9MWPesfMUBi27GSEswT3a/fo7OK3ecXtc1Pv09oh3xnvJLW1z6XnE7spyKXrRVChONWPoZmXE t3oQxBFxcPIwVUyohA8X04849XG8Sx8lMagWllU1dp2G9AQI68CDZPrx77nmFpPa7h+GDIAddPw6y ZjHpWsniFm19Xl0civBdyaz3jBlkbHdzXEWGu555Q4hXBRtjH7P/ew8q3fKZb/ZK71Um4UMVm1sEi gAvsmXmBMK/SFcy8ECKQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1unrEy-00000006Rl0-2kZZ; Mon, 18 Aug 2025 04:13:00 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1unrEx-00000006RkO-19Br for linux-riscv@bombadil.infradead.org; Mon, 18 Aug 2025 04:12:59 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=psS8/HGvEcGOGsMgWWXg1B2q2pSduh9TsFVsTLXCZt8=; b=CWewRRao+0D+Z+5V/uxFu7fG3c DIz/kM5FD58YChzu2fvCyNKjjM0ysPtGMjC7tH/PgZ7jQo8u/1yciXS8CgWHFDwpyB5yfLSOJUfXU Z9CpWAUoNb46+z4dqsrr3EguiinFuS9aAqGAP4ZHgpvHXLD44PDXemeHcSkHvmcuytKS5WHnSc7c6 Z3rkovTa+MV6TkvFijWPKBPpHALJsj9ELIBjan6Q3b/NXYldXEb5C6OukL7Zth0uZBGE+Ax0EllyA p0hUJe/VZIOYeRB3p3t/wdBsZu4hgZ68ohL+muDSNE7ib4SDGYLFhB8GJXxXaoM5R/jrpHPMEIb3U mcP/WRBQ==; Received: from mail-pl1-x62f.google.com ([2607:f8b0:4864:20::62f]) by casper.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1unrE5-00000000EeI-051B for linux-riscv@lists.infradead.org; Mon, 18 Aug 2025 04:12:57 +0000 Received: by mail-pl1-x62f.google.com with SMTP id d9443c01a7336-2445826fd9dso40691725ad.3 for ; Sun, 17 Aug 2025 21:12:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1755490323; x=1756095123; darn=lists.infradead.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=psS8/HGvEcGOGsMgWWXg1B2q2pSduh9TsFVsTLXCZt8=; b=JkYw1ELtkFi8NPxY/KkbBvrJUT6hNRbNHzH2n1wQvV02vYB7vC6+++4Pz68Q+fIs/8 SUHs0hwot+8E4Hk9fHTsuvuRA5ueR07O6rxJmdVasjUX3zneAAxK/BLboPa0kLOyfltk DYa1sv5+1MW0oJOzy+qheXaV473PGzuHnqD5MfRr0czPhBb+JqMjfnqbd5rccj7U11h3 yxPfYgIXVRDm4X9tHQZGLN8PcSczLz9v+gUj2aJuGhX11eVmE5xHgRB6UyRodLAon9ci lNG5nhG/wncx07BC9GvYhV8w80CJwcYRikb1QY/ZyZl6yPgS9CCq9oh36y5kaKS1TS2F qpeQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1755490323; x=1756095123; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=psS8/HGvEcGOGsMgWWXg1B2q2pSduh9TsFVsTLXCZt8=; b=JwIPYpO/iPXp3KZNrcLSnEZ9N0nCq2xC3GsNdOilx+/frCxyikFIJiBFvBcw8KMYg1 HG/sqUlz7SgZQ8T7Ev+kNfq2GqeFkxMYBjLcNJg5fhpLEXnDv7pV2JN2Z9BhQITpDB4q LfCr5j6Jk4cHfvgLGA2A4BtKEeUTgCot7ah2zBEUucU2qrCJBJ63boxbzn3bxVviCaMU w6f1Sbqfj+lcVQNoJVaPncrhwVlWo0BNbPjs23yV2SdfYEHzUM4UfKplDovkOiszGXGF LRIUyIyP1MlMApGFbZpHZSkiL6HPShi9fp1xDU6uddSRr/5PObHAcjNwcR5/QQm4N/Hy y1Rg== X-Forwarded-Encrypted: i=1; AJvYcCWiOgNpquDXidji75bs/gfBK1NLmKLasbkapW+f+dGhfRHknGAaEx8nivGRYhwZhr2ENBkDcmia+cyV5g==@lists.infradead.org X-Gm-Message-State: AOJu0YzH/3EbsQsQIKMCQDR11ZiGywU1/oGXQAo3qmZanG8AQP6qA6+z Let2r7Dy0W//q852w0+lid0iFssXFQsN5LwS81hURotSgbHaK9nKi5p9D14LYZ4L4P0= X-Gm-Gg: ASbGnctrZIo/mO/DRc0T0AKf3QF7BCCOMnhKKYnf0ezQ97wfnW6afKgVLEGzolvgiy+ 5BOFl/vnXKU6svmlDz1GPd8Pnr+3dnnaAYipfe/fyqLeL0irGZgNV516oVsSMRjuxRTPkeyhu1X +cv/dzEmBa9mPW5HDgEwo7G7jftBDqF+KEVD3h7E6uc+Hzb0qoV7wQezcUNaODkWqqPvKSjZNqW mzUA0Tn6VxW66+aEk2vN681KN18tMGfjyVvSBkPhty9HR04vpI6DM4168J1dRjIXHYDpksnX1in OGDr6b0bp9xm7xvGQI1iOl8pRL36Ocb/51GRcAHHPpQM/tnc1NhBCExwgtnhXinJpyNAkaGp9eU YZWZM4b1Vhh597tdI0ZI7ShkUVrZpY3tIQpUp/EpePLIA25IweDpcxw== X-Google-Smtp-Source: AGHT+IFg2JaZydXsoz3oTb0p0Gh/5FN3+0FJRvvXtyYYz3C7r58Enx6ENab6eBnXqudj+8YWHETz5w== X-Received: by 2002:a17:902:d58f:b0:240:5c38:756b with SMTP id d9443c01a7336-2446d710a8fmr130054555ad.14.1755490322531; Sun, 17 Aug 2025 21:12:02 -0700 (PDT) Received: from localhost.localdomain ([122.171.17.53]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-32343c70356sm6560972a91.25.2025.08.17.21.11.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 17 Aug 2025 21:12:02 -0700 (PDT) From: Anup Patel To: Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jassi Brar , Thomas Gleixner , "Rafael J . Wysocki" , Mika Westerberg , Andy Shevchenko , Linus Walleij , Bartosz Golaszewski , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Subject: [PATCH v10 14/24] ACPI: property: Refactor acpi_fwnode_get_reference_args() to support nargs_prop Date: Mon, 18 Aug 2025 09:39:10 +0530 Message-ID: <20250818040920.272664-15-apatel@ventanamicro.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250818040920.272664-1-apatel@ventanamicro.com> References: <20250818040920.272664-1-apatel@ventanamicro.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250818_051206_340387_D439FDB0 X-CRM114-Status: GOOD ( 19.35 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Anup Patel , devicetree@vger.kernel.org, Andrew Jones , Alexandre Ghiti , Atish Patra , Leyfoon Tan , Anup Patel , "Rafael J . Wysocki" , linux-kernel@vger.kernel.org, Samuel Holland , linux-acpi@vger.kernel.org, Palmer Dabbelt , Paul Walmsley , linux-riscv@lists.infradead.org, Len Brown , linux-clk@vger.kernel.org, Rahul Pathak Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Sunil V L Currently, acpi_fwnode_get_reference_args() delegates to the internal function __acpi_node_get_property_reference() to retrieve property references. However, this function does not handle the nargs_prop (cells property) parameter, and instead expects the number of arguments (nargs) to be known or hardcoded. As a result, when fwnode_property_get_reference_args() is used with a valid nargs_prop, the ACPI backend ignores it, whereas the Device Tree (DT) backend uses the #*-cells property from the reference node to determine the number of arguments dynamically. To support the nargs_prop in ACPI, refactor the code as follows: - Move the implementation from __acpi_node_get_property_reference() into acpi_fwnode_get_reference_args(). - Update __acpi_node_get_property_reference() to call the (now updated) acpi_fwnode_get_reference_args() passing NULL as nargs_prop to keep the behavior of __acpi_node_get_property_reference() intact. Acked-by: Rafael J. Wysocki Suggested-by: Andy Shevchenko Reviewed-by: Andy Shevchenko Signed-off-by: Sunil V L Signed-off-by: Anup Patel --- drivers/acpi/property.c | 101 ++++++++++++++++++++-------------------- 1 file changed, 50 insertions(+), 51 deletions(-) diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c index 436019d96027..d4863746fb11 100644 --- a/drivers/acpi/property.c +++ b/drivers/acpi/property.c @@ -882,45 +882,10 @@ static struct fwnode_handle *acpi_parse_string_ref(const struct fwnode_handle *f return &dn->fwnode; } -/** - * __acpi_node_get_property_reference - returns handle to the referenced object - * @fwnode: Firmware node to get the property from - * @propname: Name of the property - * @index: Index of the reference to return - * @num_args: Maximum number of arguments after each reference - * @args: Location to store the returned reference with optional arguments - * (may be NULL) - * - * Find property with @name, verifify that it is a package containing at least - * one object reference and if so, store the ACPI device object pointer to the - * target object in @args->adev. If the reference includes arguments, store - * them in the @args->args[] array. - * - * If there's more than one reference in the property value package, @index is - * used to select the one to return. - * - * It is possible to leave holes in the property value set like in the - * example below: - * - * Package () { - * "cs-gpios", - * Package () { - * ^GPIO, 19, 0, 0, - * ^GPIO, 20, 0, 0, - * 0, - * ^GPIO, 21, 0, 0, - * } - * } - * - * Calling this function with index %2 or index %3 return %-ENOENT. If the - * property does not contain any more values %-ENOENT is returned. The NULL - * entry must be single integer and preferably contain value %0. - * - * Return: %0 on success, negative error code on failure. - */ -int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode, - const char *propname, size_t index, size_t num_args, - struct fwnode_reference_args *args) +static int acpi_fwnode_get_reference_args(const struct fwnode_handle *fwnode, + const char *propname, const char *nargs_prop, + unsigned int args_count, unsigned int index, + struct fwnode_reference_args *args) { const union acpi_object *element, *end; const union acpi_object *obj; @@ -999,7 +964,7 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode, ret = acpi_get_ref_args(idx == index ? args : NULL, acpi_fwnode_handle(device), - &element, end, num_args); + &element, end, args_count); if (ret < 0) return ret; @@ -1017,7 +982,7 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode, ret = acpi_get_ref_args(idx == index ? args : NULL, ref_fwnode, &element, end, - num_args); + args_count); if (ret < 0) return ret; @@ -1039,6 +1004,50 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode, return -ENOENT; } + +/** + * __acpi_node_get_property_reference - returns handle to the referenced object + * @fwnode: Firmware node to get the property from + * @propname: Name of the property + * @index: Index of the reference to return + * @num_args: Maximum number of arguments after each reference + * @args: Location to store the returned reference with optional arguments + * (may be NULL) + * + * Find property with @name, verifify that it is a package containing at least + * one object reference and if so, store the ACPI device object pointer to the + * target object in @args->adev. If the reference includes arguments, store + * them in the @args->args[] array. + * + * If there's more than one reference in the property value package, @index is + * used to select the one to return. + * + * It is possible to leave holes in the property value set like in the + * example below: + * + * Package () { + * "cs-gpios", + * Package () { + * ^GPIO, 19, 0, 0, + * ^GPIO, 20, 0, 0, + * 0, + * ^GPIO, 21, 0, 0, + * } + * } + * + * Calling this function with index %2 or index %3 return %-ENOENT. If the + * property does not contain any more values %-ENOENT is returned. The NULL + * entry must be single integer and preferably contain value %0. + * + * Return: %0 on success, negative error code on failure. + */ +int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode, + const char *propname, size_t index, + size_t num_args, + struct fwnode_reference_args *args) +{ + return acpi_fwnode_get_reference_args(fwnode, propname, NULL, index, num_args, args); +} EXPORT_SYMBOL_GPL(__acpi_node_get_property_reference); static int acpi_data_prop_read_single(const struct acpi_device_data *data, @@ -1558,16 +1567,6 @@ acpi_fwnode_property_read_string_array(const struct fwnode_handle *fwnode, val, nval); } -static int -acpi_fwnode_get_reference_args(const struct fwnode_handle *fwnode, - const char *prop, const char *nargs_prop, - unsigned int args_count, unsigned int index, - struct fwnode_reference_args *args) -{ - return __acpi_node_get_property_reference(fwnode, prop, index, - args_count, args); -} - static const char *acpi_fwnode_get_name(const struct fwnode_handle *fwnode) { const struct acpi_device *adev; -- 2.43.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv