From nobody Wed Oct 8 23:44:10 2025 Received: from sender4-pp-f112.zoho.com (sender4-pp-f112.zoho.com [136.143.188.112]) (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 D87F82D3A66; Mon, 23 Jun 2025 18:01:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.112 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750701715; cv=pass; b=uQgrSKmNxj9mVgDdQVvHejRabNzBEJLD3MpI71ci7+Z8igo0oWjGBsqrFRWV4eUbozQhzu25WUlfUSwoMVgUkNZvB6SK8oAD0lc4A0uyPCIz3LCA4LLosCur/4s959Tvu5ay4cEUd4GtsDar8JZHWzQ1fngGSPPFWU3+hOvhjdI= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750701715; c=relaxed/simple; bh=jD0Bs8pEGYPz7Co3uofmKUKddNMzKnpOUNwkMt5xm9U=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=PA9Dohf3aicmQsJvlleyDHfc2SUiL29YILW89BQ9hkICVjEVKBDC7zUPYGWsVH0vavryKfKmy+OgoqSGSW/g5SCOy5/cbp6pRt4ecTUbrTid/P2YmeVHlFo9Qz//RVfki7OercFrvUbNZB7cTvQEnfmI/9ch/hKfwjHxqOd+fdE= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (1024-bit key) header.d=collabora.com header.i=daniel.almeida@collabora.com header.b=ARPuBqwK; arc=pass smtp.client-ip=136.143.188.112 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=collabora.com header.i=daniel.almeida@collabora.com header.b="ARPuBqwK" ARC-Seal: i=1; a=rsa-sha256; t=1750701695; cv=none; d=zohomail.com; s=zohoarc; b=iCbDQEXnNosRGbP0xeH85y5jc+bx0dqN7yojPmAU8guMR1lCQVLk7W4KJQTtGKGRCbIlchq5m96sQ4Z+E7gWQPlN7qlbcrE2cshfuyYzed+jQNoEgP4OzQuWDp1ZnF38TNRvxEMpXO99NVLOcRIxiWfiNNQ2JjoE5Qaa/BqSn1I= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1750701695; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=jXtQ5usej9364YkX/FNJQWmiFrppYRFaFOduw0COy+E=; b=O75osqKpFlXyhx55p9bA92Lmx2PRQHYafUC4sTMRb26Bc2mCz64fnTuzCaK6k97tqc7Uv3laoMr5Xt+Hp5Jcr07bScx8GzreercMyHJmb9utiCPGPDgiNtrI9NIm9k0ezEpE5QnhtzJBhqf9Aj/qnefYAQLEDXhEruhnNymkCek= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=daniel.almeida@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1750701695; s=zohomail; d=collabora.com; i=daniel.almeida@collabora.com; h=From:From:Date:Date:Subject:Subject:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id:Message-Id:References:In-Reply-To:To:To:Cc:Cc:Reply-To; bh=jXtQ5usej9364YkX/FNJQWmiFrppYRFaFOduw0COy+E=; b=ARPuBqwKaL1kv2BvRx7u3jqemRHU0i3CqMBHAz9L84PeoZclRCUm1bSSRzF5WFl6 S5XnP3NfFhQIIOC+Y0I+l+idutSIwbggiLYye+HnJLgYaZTo9t6VuCkMe+/FQhogQEM aH+QexbBxGDIYitpCkTj/SBmwymcppWuwPBdxc7I= Received: by mx.zohomail.com with SMTPS id 1750701693614683.6155317146832; Mon, 23 Jun 2025 11:01:33 -0700 (PDT) From: Daniel Almeida Date: Mon, 23 Jun 2025 15:01:00 -0300 Subject: [PATCH v10 3/4] rust: platform: add resource accessors 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: <20250623-topics-tyr-platform_iomem-v10-3-ed860a562940@collabora.com> References: <20250623-topics-tyr-platform_iomem-v10-0-ed860a562940@collabora.com> In-Reply-To: <20250623-topics-tyr-platform_iomem-v10-0-ed860a562940@collabora.com> To: Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Greg Kroah-Hartman , "Rafael J. Wysocki" , Andrew Morton , Andy Shevchenko , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Bjorn Helgaas , Mika Westerberg , Ying Huang , Benno Lossin Cc: linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org, Daniel Almeida X-Mailer: b4 0.14.2 X-ZohoMailClient: External A previous patch has exposed the abstractions struct resource. Now make it possible to retrieve resources from platform devices in Rust using either a name or an index. Signed-off-by: Daniel Almeida --- rust/kernel/platform.rs | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/rust/kernel/platform.rs b/rust/kernel/platform.rs index 5b21fa517e55348582622ec10471918919502959..0eedb8239fec31df7ab64dc68d2= 20c9d965f1f21 100644 --- a/rust/kernel/platform.rs +++ b/rust/kernel/platform.rs @@ -7,6 +7,7 @@ use crate::{ bindings, container_of, device, driver, error::{to_result, Result}, + io::Resource, of, prelude::*, str::CStr, @@ -188,6 +189,43 @@ impl Device { fn as_raw(&self) -> *mut bindings::platform_device { self.0.get() } + + /// Returns the resource at `index`, if any. + pub fn resource_by_index(&self, index: u32) -> Option<&Resource> { + // SAFETY: `self.as_raw()` returns a valid pointer to a `struct pl= atform_device`. + let resource =3D unsafe { + bindings::platform_get_resource(self.as_raw(), bindings::IORES= OURCE_MEM, index) + }; + + if resource.is_null() { + return None; + } + + // SAFETY: `resource` is a valid pointer to a `struct resource` as + // returned by `platform_get_resource`. + Some(unsafe { Resource::as_ref(resource) }) + } + + /// Returns the resource with a given `name`, if any. + pub fn resource_by_name(&self, name: &CStr) -> Option<&Resource> { + // SAFETY: `self.as_raw()` returns a valid pointer to a `struct + // platform_device` and `name` points to a valid C string. + let resource =3D unsafe { + bindings::platform_get_resource_byname( + self.as_raw(), + bindings::IORESOURCE_MEM, + name.as_char_ptr(), + ) + }; + + if resource.is_null() { + return None; + } + + // SAFETY: `resource` is a valid pointer to a `struct resource` as + // returned by `platform_get_resource`. + Some(unsafe { Resource::as_ref(resource) }) + } } =20 // SAFETY: `Device` is a transparent wrapper of a type that doesn't depend= on `Device`'s generic --=20 2.50.0