From nobody Fri Apr 3 00:57:30 2026 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 DCBECC54EE9 for ; Mon, 19 Sep 2022 12:13:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229918AbiISMNW (ORCPT ); Mon, 19 Sep 2022 08:13:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45478 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229652AbiISMNT (ORCPT ); Mon, 19 Sep 2022 08:13:19 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 299A2AE5A for ; Mon, 19 Sep 2022 05:13:16 -0700 (PDT) Received: from benjamin-XPS-13-9310.. (unknown [IPv6:2a01:e0a:120:3210:a78:dc38:d663:4e37]) (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: benjamin.gaignard) by madras.collabora.co.uk (Postfix) with ESMTPSA id 5B26B66019EE; Mon, 19 Sep 2022 13:13:13 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1663589593; bh=0ExZBX4ZBR0DoaPRlH8a5BMVZUgZpBnkAA1zeufhj+8=; h=From:To:Cc:Subject:Date:From; b=OXmGJ+jmWQ4GDb8m1enGjTWYIOPeRNAUlDbyt7SMsyXMybTbF9Ef1RF6kXXEoV7Gx s/mmhd3q47BpWL7vEO4Wc7nSxVDUWmAq/QdYYp4Vt99/wLlWd8H+iHsnOyV1HHmyQ8 X0e2d9AR059l7g283E2vr4OPPeH+V9Z+GVmJruOz4FzDANz9uqo3TWz6JI2V7djHXk HAJU4rMxQD5dCi3kutGfvY/AeVl4aXGAixc2V5jZzBqqsYUk+eftv4dvF86Se5v9xa 8/vv2gTGjBO1CetvWHKRqxhWvPhGxSqjghcrEOj7euF6o2RqUHSAjlXFJW0H2SGK5h T45ygJcST2dWA== From: Benjamin Gaignard To: shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@collabora.com, Benjamin Gaignard Subject: [PATCH v3] soc: imx: imx8m-blk-ctrl: Defer probe if 'bus' genpd is not yet ready Date: Mon, 19 Sep 2022 14:13:02 +0200 Message-Id: <20220919121302.597993-1-benjamin.gaignard@collabora.com> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Depending of the boot sequence 'bus' genpd could be probed after imx8m-blk-= ctrl which led driver probe to fail. Change the returned error to allow to defer the probe in this case. Signed-off-by: Benjamin Gaignard Reviewed-by: Peng Fan --- v3: - only return -EPROBE_DEFER if 'bus' device hasn't be found. v2: - keep dev_err_probe only change the return value. drivers/soc/imx/imx8m-blk-ctrl.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/soc/imx/imx8m-blk-ctrl.c b/drivers/soc/imx/imx8m-blk-c= trl.c index dff7529268e4..1c195e9e8895 100644 --- a/drivers/soc/imx/imx8m-blk-ctrl.c +++ b/drivers/soc/imx/imx8m-blk-ctrl.c @@ -214,9 +214,14 @@ static int imx8m_blk_ctrl_probe(struct platform_device= *pdev) return -ENOMEM; =20 bc->bus_power_dev =3D genpd_dev_pm_attach_by_name(dev, "bus"); - if (IS_ERR(bc->bus_power_dev)) - return dev_err_probe(dev, PTR_ERR(bc->bus_power_dev), - "failed to attach power domain \"bus\"\n"); + if (IS_ERR(bc->bus_power_dev)) { + if (PTR_ERR(bc->bus_power_dev) =3D=3D -ENODEV) + return dev_err_probe(dev, -EPROBE_DEFER, + "failed to attach power domain \"bus\"\n"); + else + return dev_err_probe(dev, PTR_ERR(bc->bus_power_dev), + "failed to attach power domain \"bus\"\n"); + } =20 for (i =3D 0; i < bc_data->num_domains; i++) { const struct imx8m_blk_ctrl_domain_data *data =3D &bc_data->domains[i]; --=20 2.32.0