From patchwork Mon May 2 09:38:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hector Martin X-Patchwork-Id: 12834059 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 01CD9C433EF for ; Mon, 2 May 2022 09:38:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1384259AbiEBJmW (ORCPT ); Mon, 2 May 2022 05:42:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44670 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1381191AbiEBJmV (ORCPT ); Mon, 2 May 2022 05:42:21 -0400 Received: from mail.marcansoft.com (marcansoft.com [IPv6:2a01:298:fe:f::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 77F6111144; Mon, 2 May 2022 02:38:52 -0700 (PDT) Received: from [127.0.0.1] (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: hector@marcansoft.com) by mail.marcansoft.com (Postfix) with ESMTPSA id B6B5441982; Mon, 2 May 2022 09:38:47 +0000 (UTC) From: Hector Martin To: Marc Zyngier Cc: Hector Martin , Lorenzo Pieralisi , Rob Herring , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Bjorn Helgaas , Alyssa Rosenzweig , Sven Peter , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/3] PCI: apple: PWREN GPIO support & related fixes Date: Mon, 2 May 2022 18:38:29 +0900 Message-Id: <20220502093832.32778-1-marcan@marcan.st> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Hi all, This short series adds support for the PWREN GPIO to the Apple PCIe controller driver, and along the way fixes some GPIO handling issues which cropped up. Since the PWREN GPIO is provided by SMC which is a fairly high level driver, PCI can probe before it is ready. Worse, only some devices need PWREN, which can make the probe fail halfway through with some ports initialized and not others, which the driver cannot recover gracefully from. The second patch fixes this situation, so probe deferral works properly in these cases. The third patch adds PWREN support per se, and the first one is just related stuff I noticed while writing this. Hector Martin (3): PCI: apple: GPIO handling nitfixes PCI: apple: Probe all GPIOs for availability first PCI: apple: Add support for optional PWREN GPIO drivers/pci/controller/pcie-apple.c | 67 ++++++++++++++++++++++++++--- 1 file changed, 60 insertions(+), 7 deletions(-)