From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Zhang Subject: [PATCH v3 3/4] mfd: max77620: Add low battery monitor support Date: Tue, 12 Feb 2019 14:43:52 +0800 Message-ID: <20190212064353.7451-4-markz@nvidia.com> References: <20190212064353.7451-1-markz@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20190212064353.7451-1-markz@nvidia.com> Sender: linux-kernel-owner@vger.kernel.org To: lee.jones@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: linux-tegra@vger.kernel.org, Mark Zhang , Laxman Dewangan , Venkat Reddy Talla List-Id: linux-tegra@vger.kernel.org This patch adds PMIC configurations for low-battery monitoring by handling max77620 register CNFGGLBL1. Signed-off-by: Laxman Dewangan Signed-off-by: Venkat Reddy Talla Signed-off-by: Mark Zhang --- drivers/mfd/max77620.c | 35 ++++++++++++++++++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c index 494d98357f65..6f0c85b2ca26 100644 --- a/drivers/mfd/max77620.c +++ b/drivers/mfd/max77620.c @@ -474,6 +474,35 @@ static int max77620_init_backup_battery_charging(struc= t max77620_chip *chip) return ret; } =20 +static int max77620_init_low_battery_monitor(struct max77620_chip *chip) +{ + struct device *dev =3D chip->dev; + bool bval; + int ival; + u8 mask =3D 0; + u8 val =3D 0; + int ret; + + mask |=3D MAX77620_CNFGGLBL1_LBDAC_EN; + bval =3D of_property_read_bool(dev->of_node, + "maxim,low-battery-dac-enable"); + if (bval) + val |=3D MAX77620_CNFGGLBL1_LBDAC_EN; + + mask |=3D MAX77620_CNFGGLBL1_LBRSTEN | MAX77620_CNFGGLBL1_MPPLD; + ival =3D of_property_match_string(dev->of_node, + "maxim,low-battery-mode", "shutdown"); + if (ival < 0) + val |=3D MAX77620_CNFGGLBL1_LBRSTEN; + else + val |=3D MAX77620_CNFGGLBL1_MPPLD; + + ret =3D regmap_update_bits(chip->rmap, MAX77620_REG_CNFGGLBL1, mask, val)= ; + if (ret < 0) + dev_err(dev, "Reg CNFGGLBL1 update failed: %d\n", ret); + return ret; +} + static int max77620_read_es_version(struct max77620_chip *chip) { unsigned int val; @@ -563,7 +592,11 @@ static int max77620_probe(struct i2c_client *client, if (ret < 0) return ret; =20 - ret =3D devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, + ret =3D max77620_init_low_battery_monitor(chip); + if (ret < 0) + return ret; + + ret =3D devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, mfd_cells, n_mfd_cells, NULL, 0, regmap_irq_get_domain(chip->top_irq_data)); if (ret < 0) { --=20 2.19.2 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 X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2D375C282C4 for ; Tue, 12 Feb 2019 06:44:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E8D1720836 for ; Tue, 12 Feb 2019 06:44:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="EH0qkMTR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727749AbfBLGo2 (ORCPT ); Tue, 12 Feb 2019 01:44:28 -0500 Received: from hqemgate16.nvidia.com ([216.228.121.65]:14055 "EHLO hqemgate16.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727247AbfBLGoZ (ORCPT ); Tue, 12 Feb 2019 01:44:25 -0500 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Mon, 11 Feb 2019 22:44:26 -0800 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Mon, 11 Feb 2019 22:44:25 -0800 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Mon, 11 Feb 2019 22:44:25 -0800 Received: from HQMAIL107.nvidia.com (172.20.187.13) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 12 Feb 2019 06:44:24 +0000 Received: from hqnvemgw01.nvidia.com (172.20.150.20) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1395.4 via Frontend Transport; Tue, 12 Feb 2019 06:44:24 +0000 Received: from localhost.localdomain (Not Verified[10.19.225.143]) by hqnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Mon, 11 Feb 2019 22:44:24 -0800 From: Mark Zhang To: , , , , CC: , Mark Zhang , Laxman Dewangan , Venkat Reddy Talla Subject: [PATCH v3 3/4] mfd: max77620: Add low battery monitor support Date: Tue, 12 Feb 2019 14:43:52 +0800 Message-ID: <20190212064353.7451-4-markz@nvidia.com> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20190212064353.7451-1-markz@nvidia.com> References: <20190212064353.7451-1-markz@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: quoted-printable Content-Type: text/plain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1549953866; bh=J1ZZiaJN/zXyCNQTdB3tpGtybD3cqAaDLI3I75wW7lU=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:X-NVConfidentiality: Content-Transfer-Encoding:Content-Type; b=EH0qkMTRyIV/7Dc6nCcdMQxQX1meWIit5v/jb9LxvvKhP2H3JAtONltrXrC3+Txr/ pTVupLrs41ybqygtv3GAJLox2okapJpGiIEOEqOM7M3PigwV4qGRkvif3s33DnTWCI Gcr2N92EmgIBzdrSSbXvvyY57bz+thNYpfyH8i7jC8tTs3UqZ3SzFgNm6oGoLJsbp2 YrP/tmzoINt722fX3qSAj8hflcyzRKq24009VQLAAY3CdF627LU4orBSa6UHk5sW5s SwipZzg1do+CRpiCrQUwxWFTG61r79V31A7iHwnhaaCmobtrYZrQdkYjmySoMoGEdq xfHUzjhBflQOw== Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds PMIC configurations for low-battery monitoring by handling max77620 register CNFGGLBL1. Signed-off-by: Laxman Dewangan Signed-off-by: Venkat Reddy Talla Signed-off-by: Mark Zhang --- drivers/mfd/max77620.c | 35 ++++++++++++++++++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c index 494d98357f65..6f0c85b2ca26 100644 --- a/drivers/mfd/max77620.c +++ b/drivers/mfd/max77620.c @@ -474,6 +474,35 @@ static int max77620_init_backup_battery_charging(struc= t max77620_chip *chip) return ret; } =20 +static int max77620_init_low_battery_monitor(struct max77620_chip *chip) +{ + struct device *dev =3D chip->dev; + bool bval; + int ival; + u8 mask =3D 0; + u8 val =3D 0; + int ret; + + mask |=3D MAX77620_CNFGGLBL1_LBDAC_EN; + bval =3D of_property_read_bool(dev->of_node, + "maxim,low-battery-dac-enable"); + if (bval) + val |=3D MAX77620_CNFGGLBL1_LBDAC_EN; + + mask |=3D MAX77620_CNFGGLBL1_LBRSTEN | MAX77620_CNFGGLBL1_MPPLD; + ival =3D of_property_match_string(dev->of_node, + "maxim,low-battery-mode", "shutdown"); + if (ival < 0) + val |=3D MAX77620_CNFGGLBL1_LBRSTEN; + else + val |=3D MAX77620_CNFGGLBL1_MPPLD; + + ret =3D regmap_update_bits(chip->rmap, MAX77620_REG_CNFGGLBL1, mask, val)= ; + if (ret < 0) + dev_err(dev, "Reg CNFGGLBL1 update failed: %d\n", ret); + return ret; +} + static int max77620_read_es_version(struct max77620_chip *chip) { unsigned int val; @@ -563,7 +592,11 @@ static int max77620_probe(struct i2c_client *client, if (ret < 0) return ret; =20 - ret =3D devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, + ret =3D max77620_init_low_battery_monitor(chip); + if (ret < 0) + return ret; + + ret =3D devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, mfd_cells, n_mfd_cells, NULL, 0, regmap_irq_get_domain(chip->top_irq_data)); if (ret < 0) { --=20 2.19.2