From patchwork Tue Nov 30 13:25:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marek_Beh=C3=BAn?= X-Patchwork-Id: 12647317 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 D2A41C433F5 for ; Tue, 30 Nov 2021 13:25:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240202AbhK3N3I (ORCPT ); Tue, 30 Nov 2021 08:29:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40486 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240231AbhK3N3H (ORCPT ); Tue, 30 Nov 2021 08:29:07 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [IPv6:2604:1380:40e1:4800::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C19E1C061574 for ; Tue, 30 Nov 2021 05:25:47 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 18081CE198C for ; Tue, 30 Nov 2021 13:25:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 31444C53FD5; Tue, 30 Nov 2021 13:25:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1638278744; bh=TfTi0hXpg38k3rRmwzOE2Jq1Mv1AbNIgyBJe+EvewW4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=INLf11PeIATajohTwFXR8bY4/d7ga+lvCAGfqVDhQbIfv4W0xg6C71vxUyIsMnzhj FlcSqGsErJYXwDCo3Dl5RjtwxQDf3MI6RJK+pPL4NXMK6V9EazFX6RaUthfKL6DZWg UMlxzAmFciry/TL6NrILPMr7CwZ1cK1/c3O3b1TqpMsVD8bDL3D3lQAWFw6mbAMNGF ldg7IUYVtz5mmZupGTpC1s1Yg4lp/nHyTQtaA9u4iyEty0+xt1LG2G2Vx61TOjGJz+ UHzsgPSAcpYjRpRGjchG2oAsbXmd6kq0wGru7GPm6W4QZRmcD6+fKc1k59pE73JCPK pC5HcS0fIi3DA== From: =?utf-8?q?Marek_Beh=C3=BAn?= To: Lorenzo Pieralisi Cc: pali@kernel.org, linux-pci@vger.kernel.org, =?utf-8?q?Marek_Beh=C3=BAn?= Subject: [PATCH v3 09/11] PCI: aardvark: Assert PERST# when unbinding driver Date: Tue, 30 Nov 2021 14:25:21 +0100 Message-Id: <20211130132523.28126-10-kabel@kernel.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20211130132523.28126-1-kabel@kernel.org> References: <20211130132523.28126-1-kabel@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Pali Rohár Put the PCIe card into reset by asserting PERST# signal when unbinding driver. Signed-off-by: Pali Rohár Signed-off-by: Marek Behún --- drivers/pci/controller/pci-aardvark.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index b3d89cb449b6..271ebecee965 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -1737,6 +1737,10 @@ static int advk_pcie_remove(struct platform_device *pdev) /* Free config space for emulated root bridge */ pci_bridge_emul_cleanup(&pcie->bridge); + /* Assert PERST# signal which prepares PCIe card for power down */ + if (pcie->reset_gpio) + gpiod_set_value_cansleep(pcie->reset_gpio, 1); + /* Disable outbound address windows mapping */ for (i = 0; i < OB_WIN_COUNT; i++) advk_pcie_disable_ob_win(pcie, i);