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 32EE2C54EE9 for ; Mon, 19 Sep 2022 12:14:36 +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:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=XGDNZTPgUnc6NEIpsviTO+ecjrk8h0hkVNwSu/nanmE=; b=EOnzp6N8yfDlHJ baSoGedXkadT5Y9VwZrXPz1qheMFgU5nZdyaLZY64o3AuZ+/r3VZdLUOE0mGfdy6qbV71X/sqKn1z aTemvhv/OpiWkExpX7PXdCDLRAstEHYR6NOLbWTKmH9e502XWJLPG+Rxb27bKg7z6fH8gP5bNIpEm zqtssMJE8ENkNLqB6Lnaesgp2hZb01YJux2WpVoGfwXxl5/Y8BWA7bcDXriVBbiH1XxBpPeUL7Rsl bJuNAk8HszwGKJ/QgI1/ELjVheFPg3ORNQIM2+/mIoyc/gT6nikW8K4QORjBJ+3toC3g1CiT0nXjj jfuneIYfIEDwfwCsYgXQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oaFeM-00Bfve-JQ; Mon, 19 Sep 2022 12:13:22 +0000 Received: from madras.collabora.co.uk ([2a00:1098:0:82:1000:25:2eeb:e5ab]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oaFeJ-00BfuL-JY for linux-arm-kernel@lists.infradead.org; Mon, 19 Sep 2022 12:13:21 +0000 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220919_051319_895143_CC3C49F1 X-CRM114-Status: GOOD ( 14.55 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 --- 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-ctrl.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; bc->bus_power_dev = 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) == -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"); + } for (i = 0; i < bc_data->num_domains; i++) { const struct imx8m_blk_ctrl_domain_data *data = &bc_data->domains[i]; -- 2.32.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel