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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 86ADFC7EE25 for ; Fri, 9 Jun 2023 18:33:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231318AbjFISdo (ORCPT ); Fri, 9 Jun 2023 14:33:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231748AbjFISd3 (ORCPT ); Fri, 9 Jun 2023 14:33:29 -0400 X-Greylist: delayed 353 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Fri, 09 Jun 2023 11:33:08 PDT Received: from mail-4325.protonmail.ch (mail-4325.protonmail.ch [185.70.43.25]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 90AE3421A; Fri, 9 Jun 2023 11:33:08 -0700 (PDT) Date: Fri, 09 Jun 2023 18:33:00 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=protonmail.com; s=protonmail3; t=1686335586; x=1686594786; bh=dB2CIMlIx8K8kX4QYd3DEOspDKK7Zaf5MnV9JTtqdRk=; h=Date:To:From:Cc:Subject:Message-ID:In-Reply-To:References: Feedback-ID:From:To:Cc:Date:Subject:Reply-To:Feedback-ID: Message-ID:BIMI-Selector; b=sLmtgWG6fOTMDKCVT0jmK2nNcZiqy9q6l8VJlQVfilK3fiIK+7gHxk/GelNS96VyW Usyxpvlp/9CnCV5pTkiE7AWHiLxE+QDMdQ4kLC5Ie6INx3PDydMKKd9cml6Etuk43K NjVFQtV8c4nW11aju7EHGTXpNhOcsHV+jLHqPJhVD+cDPks3RSrHnw+jdcaYV9vGrg y1Jb5BzXhT4+GezwFe/EobeqC/22E/PTnB6VvPvAnnmu1tpsulhINDoK56mg1ymAdN /d9AijJ7qMnW1UXtyzyFjijzPq6hUCGCrGbcoSbs+4RF8Og4dDsAROTEKT/wi8AAy8 vUpeCxVvSxX0Q== To: linux-kernel@vger.kernel.org From: Raymond Hackley Cc: Krzysztof Kozlowski , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Liam Girdwood , Mark Brown , Michael Walle , =?utf-8?Q?Uwe_Kleine-K=C3=B6nig?= , Jeremy Kerr , Raymond Hackley , netdev@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v3 2/2] NFC: nxp-nci: Add pad supply voltage pvdd-supply Message-ID: <20230609183235.85160-1-raymondhackley@protonmail.com> In-Reply-To: <20230609182639.85034-1-raymondhackley@protonmail.com> References: <20230609182639.85034-1-raymondhackley@protonmail.com> Feedback-ID: 49437091:user:proton MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org PN547/553, QN310/330 chips on some devices require a pad supply voltage (PVDD). Otherwise, the NFC won't power up. Implement support for pad supply voltage pvdd-supply that is enabled by the nxp-nci driver so that the regulator gets enabled when needed. Signed-off-by: Raymond Hackley --- drivers/nfc/nxp-nci/i2c.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/drivers/nfc/nxp-nci/i2c.c b/drivers/nfc/nxp-nci/i2c.c index d4c299be7949..6f01152d2c83 100644 --- a/drivers/nfc/nxp-nci/i2c.c +++ b/drivers/nfc/nxp-nci/i2c.c @@ -35,6 +35,7 @@ struct nxp_nci_i2c_phy { =20 =09struct gpio_desc *gpiod_en; =09struct gpio_desc *gpiod_fw; +=09struct regulator *pvdd; =20 =09int hard_fault; /* =09=09=09 * < 0 if hardware error occurred (e.g. i2c err) @@ -263,6 +264,20 @@ static const struct acpi_gpio_mapping acpi_nxp_nci_gpi= os[] =3D { =09{ } }; =20 +static void nxp_nci_i2c_poweroff(void *data) +{ +=09struct nxp_nci_i2c_phy *phy =3D data; +=09struct device *dev =3D &phy->i2c_dev->dev; +=09struct regulator *pvdd =3D phy->pvdd; +=09int r; + +=09if (!IS_ERR(pvdd) && regulator_is_enabled(pvdd)) { +=09=09r =3D regulator_disable(pvdd); +=09=09if (r < 0) +=09=09=09dev_warn(dev, "Failed to disable regulator pvdd: %d\n", r); +=09} +} + static int nxp_nci_i2c_probe(struct i2c_client *client) { =09struct device *dev =3D &client->dev; @@ -298,6 +313,25 @@ static int nxp_nci_i2c_probe(struct i2c_client *client= ) =09=09return PTR_ERR(phy->gpiod_fw); =09} =20 +=09phy->pvdd =3D devm_regulator_get_optional(dev, "pvdd"); +=09if (IS_ERR(phy->pvdd)) { +=09=09r =3D PTR_ERR(phy->pvdd); +=09=09if (r !=3D -ENODEV) +=09=09=09return dev_err_probe(dev, r, "Failed to get regulator pvdd\n"); +=09} else { +=09=09r =3D regulator_enable(phy->pvdd); +=09=09if (r < 0) { +=09=09=09nfc_err(dev, "Failed to enable regulator pvdd: %d\n", r); +=09=09=09return r; +=09=09} +=09} + +=09r =3D devm_add_action_or_reset(dev, nxp_nci_i2c_poweroff, phy); +=09if (r < 0) { +=09=09nfc_err(dev, "Failed to install poweroff handler: %d\n", r); +=09=09return r; +=09} + =09r =3D nxp_nci_probe(phy, &client->dev, &i2c_phy_ops, =09=09=09 NXP_NCI_I2C_MAX_PAYLOAD, &phy->ndev); =09if (r < 0) --=20 2.30.2