From patchwork Wed Oct 18 06:16:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sascha Hauer X-Patchwork-Id: 13426472 X-Patchwork-Delegate: cw00.choi@samsung.com 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 1B513CDB483 for ; Wed, 18 Oct 2023 06:18:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344489AbjJRGSu (ORCPT ); Wed, 18 Oct 2023 02:18:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59646 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344583AbjJRGSV (ORCPT ); Wed, 18 Oct 2023 02:18:21 -0400 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [IPv6:2a0a:edc0:2:b01:1d::104]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DD13AD52 for ; Tue, 17 Oct 2023 23:17:57 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1qszrx-0001Zi-7N; Wed, 18 Oct 2023 08:17:25 +0200 Received: from [2a0a:edc0:0:1101:1d::28] (helo=dude02.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1qszrq-002UXq-Kg; Wed, 18 Oct 2023 08:17:18 +0200 Received: from sha by dude02.red.stw.pengutronix.de with local (Exim 4.96) (envelope-from ) id 1qszrq-00Evht-1i; Wed, 18 Oct 2023 08:17:18 +0200 From: Sascha Hauer To: linux-rockchip@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Heiko Stuebner , Chanwoo Choi , Kyungmin Park , MyungJoo Ham , Will Deacon , Mark Rutland , kernel@pengutronix.de, Michael Riesch , Robin Murphy , Vincent Legoll , Rob Herring , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org, Sebastian Reichel , Sascha Hauer Subject: [PATCH v8 01/26] PM / devfreq: rockchip-dfi: Make pmu regmap mandatory Date: Wed, 18 Oct 2023 08:16:49 +0200 Message-Id: <20231018061714.3553817-2-s.hauer@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231018061714.3553817-1-s.hauer@pengutronix.de> References: <20231018061714.3553817-1-s.hauer@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: sha@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-pm@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org As a matter of fact the regmap_pmu already is mandatory because it is used unconditionally in the driver. Bail out gracefully in probe() rather than crashing later. Fixes: b9d1262bca0af ("PM / devfreq: event: support rockchip dfi controller") Reviewed-by: Sebastian Reichel Signed-off-by: Sascha Hauer --- Notes: Changes since v4: - move to beginning of the series to make it easier to backport to stable - Add a Fixes: tag - add missing of_node_put() drivers/devfreq/event/rockchip-dfi.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c index 39ac069cabc75..74893c06aa087 100644 --- a/drivers/devfreq/event/rockchip-dfi.c +++ b/drivers/devfreq/event/rockchip-dfi.c @@ -193,14 +193,15 @@ static int rockchip_dfi_probe(struct platform_device *pdev) return dev_err_probe(dev, PTR_ERR(data->clk), "Cannot get the clk pclk_ddr_mon\n"); - /* try to find the optional reference to the pmu syscon */ node = of_parse_phandle(np, "rockchip,pmu", 0); - if (node) { - data->regmap_pmu = syscon_node_to_regmap(node); - of_node_put(node); - if (IS_ERR(data->regmap_pmu)) - return PTR_ERR(data->regmap_pmu); - } + if (!node) + return dev_err_probe(&pdev->dev, -ENODEV, "Can't find pmu_grf registers\n"); + + data->regmap_pmu = syscon_node_to_regmap(node); + of_node_put(node); + if (IS_ERR(data->regmap_pmu)) + return PTR_ERR(data->regmap_pmu); + data->dev = dev; desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);