From patchwork Thu Dec 2 09:52:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 520376 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 12FA0C433EF for ; Thu, 2 Dec 2021 09:53:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346022AbhLBJ4x (ORCPT ); Thu, 2 Dec 2021 04:56:53 -0500 Received: from relay10.mail.gandi.net ([217.70.178.230]:40761 "EHLO relay10.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1356817AbhLBJ4i (ORCPT ); Thu, 2 Dec 2021 04:56:38 -0500 Received: (Authenticated sender: herve.codina@bootlin.com) by relay10.mail.gandi.net (Postfix) with ESMTPA id D088E240016; Thu, 2 Dec 2021 09:53:13 +0000 (UTC) From: Herve Codina To: Viresh Kumar , Shiraz Hashim , soc@kernel.org, Rob Herring , Thomas Gleixner , Marc Zyngier , Linus Walleij Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, Thomas Petazzoni , Herve Codina Subject: [PATCH 3/6] pinctrl: spear: plgpio: Introduce regmap phandle Date: Thu, 2 Dec 2021 10:52:52 +0100 Message-Id: <20211202095255.165797-4-herve.codina@bootlin.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211202095255.165797-1-herve.codina@bootlin.com> References: <20211202095255.165797-1-herve.codina@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Resources need to be shared between pinmux and plgpio. Introduce regmap phandle in order to retrieve the regmap from the phandle if the property is present. This allows to retrieve an external regmap (ie the one used by pinmux if the phandle references the pinmux node) from plgpio. Signed-off-by: Herve Codina --- drivers/pinctrl/spear/pinctrl-plgpio.c | 22 +++++++++++++++++----- 1 file changed, 17 insertions(+), 5 deletions(-) diff --git a/drivers/pinctrl/spear/pinctrl-plgpio.c b/drivers/pinctrl/spear/pinctrl-plgpio.c index 28538ac99eed..b36449724f3f 100644 --- a/drivers/pinctrl/spear/pinctrl-plgpio.c +++ b/drivers/pinctrl/spear/pinctrl-plgpio.c @@ -523,6 +523,7 @@ static int plgpio_probe_dt(struct platform_device *pdev, struct plgpio *plgpio) static int plgpio_probe(struct platform_device *pdev) { + struct device_node *regmap_np; struct plgpio *plgpio; int ret, irq; @@ -530,11 +531,22 @@ static int plgpio_probe(struct platform_device *pdev) if (!plgpio) return -ENOMEM; - plgpio->regmap = device_node_to_regmap(pdev->dev.of_node); - if (IS_ERR(plgpio->regmap)) { - dev_err(&pdev->dev, "Init regmap failed (%pe)\n", - plgpio->regmap); - return PTR_ERR(plgpio->regmap); + regmap_np = of_parse_phandle(pdev->dev.of_node, "regmap", 0); + if (regmap_np) { + plgpio->regmap = device_node_to_regmap(regmap_np); + of_node_put(regmap_np); + if (IS_ERR(plgpio->regmap)) { + dev_err(&pdev->dev, "Retrieve regmap failed (%pe)\n", + plgpio->regmap); + return PTR_ERR(plgpio->regmap); + } + } else { + plgpio->regmap = device_node_to_regmap(pdev->dev.of_node); + if (IS_ERR(plgpio->regmap)) { + dev_err(&pdev->dev, "Init regmap failed (%pe)\n", + plgpio->regmap); + return PTR_ERR(plgpio->regmap); + } } ret = plgpio_probe_dt(pdev, plgpio);