From patchwork Mon Mar 6 00:42:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: ChiYuan Huang X-Patchwork-Id: 64381 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp1602718wrd; Sun, 5 Mar 2023 17:20:20 -0800 (PST) X-Google-Smtp-Source: AK7set/icTSfGGVm00iQ5oPt/SsmPIQXcQSWndhnEX/+uCB6nq/JWvpCEf897iGE3Zys/VaFLqea X-Received: by 2002:a17:902:6909:b0:19e:73aa:6cbe with SMTP id j9-20020a170902690900b0019e73aa6cbemr7339993plk.13.1678065620021; Sun, 05 Mar 2023 17:20:20 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1678065620; cv=none; d=google.com; s=arc-20160816; b=mLFIld6YiQYjJkdjPiBIS4oGX3ij/4hQ2C1rpWOeHX8ULgLkBZ8SkAWE6kOr9GrWls jhFjP+2KP2F2pBh+JswYowTvwkcU+g+YG1kr5rvyqaBigJ4aPC+emE5w9YNOELyPw83I ypzz1cE5Ob1DGGQ4ZDUKOr09GNtQdA+2HGbKuSlyhw2ECOvnRefCrGkc5ntSCO0ymIM+ 1lgG8TaglN50C+1ypBfPAOAp2/EnVxBy/ZEEj85m+gxf/HA22OCz+TzUX015v2pltF5E ZXhrFoVe2PHukEtvkoHiSpIS80a6ZW7ugIuH1rLRcmD4jTm0updxKjYckDrHeFSniD8q 0SRw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:message-id:date:subject:cc:to:from; bh=feyrk8hkOkQzsrxQqOXTtw56H/yWOxamZGrFXBrIRX0=; b=lsylgGimc3g17GEZ1e+cWYJu8VWB61fGBKVuz4nbRwbSEdALopPux86PJZ61uRPyHF WYgpMmga3g3Ld4FWeY04kL6tRHK5z4JyP7sb7sFuwNzv+oL/K4ZlY8jx/tEtX6q1AISi DlwrWlvQ2L9Ml+AWOUnDiQE0UHmEa9CQKbP7BLiEXKmiGZrU9fuoUqzT1jA3CP3dUdQU fPYOWaqPQltRYFI5Hl7nYWtsWYp41vyeAhrbJ5T1NcU3SHmmhefv105ruIMiU71Cva7y nhQNpRwp48MlNyI6288blytMm/gul34JUAgLdzGa054j2VwluYet/49Ke5BnuP9b4D+Z gTqA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id a11-20020a170902b58b00b0019cafd4c385si7640967pls.408.2023.03.05.17.20.06; Sun, 05 Mar 2023 17:20:19 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229605AbjCFAnD (ORCPT + 99 others); Sun, 5 Mar 2023 19:43:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57042 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229484AbjCFAm7 (ORCPT ); Sun, 5 Mar 2023 19:42:59 -0500 Received: from mg.richtek.com (mg.richtek.com [220.130.44.152]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 441AB199F; Sun, 5 Mar 2023 16:42:55 -0800 (PST) X-MailGates: (flag:4,DYNAMIC,BADHELO,RELAY,NOHOST:PASS)(compute_score:DE LIVER,40,3) Received: from 192.168.10.46 by mg.richtek.com with MailGates ESMTP Server V5.0(16313:0:AUTH_RELAY) (envelope-from ); Mon, 06 Mar 2023 08:42:40 +0800 (CST) Received: from ex4.rt.l (192.168.10.47) by ex3.rt.l (192.168.10.46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.25; Mon, 6 Mar 2023 08:42:39 +0800 Received: from linuxcarl2.richtek.com (192.168.10.154) by ex4.rt.l (192.168.10.45) with Microsoft SMTP Server id 15.2.1118.25 via Frontend Transport; Mon, 6 Mar 2023 08:42:39 +0800 From: To: , , CC: , , , , Subject: [PATCH v3 1/2] dt-bindings: regulator: Add Richtek RT5739 Date: Mon, 6 Mar 2023 08:42:37 +0800 Message-ID: <1678063358-18128-1-git-send-email-cy_huang@richtek.com> X-Mailer: git-send-email 1.8.3.1 MIME-Version: 1.0 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1759579335748790530?= X-GMAIL-MSGID: =?utf-8?q?1759579335748790530?= From: ChiYuan Huang Add the binding document for Richtek RT5739. Signed-off-by: ChiYuan Huang Reviewed-by: Krzysztof Kozlowski --- Since v3: - Add 'Reviewed-by" tag. Since v2: - Refine dt-binding patch subject - Shorten and refine title and description without too much marketing text. - Fix the typo from 'connecton' to 'connection' in 'richtek,vsel-active-high' property description - Remove maxItems in property 'regulator-allowed-modes' - Fix the wrong min/max microvolt in binding example. Must be '300000' and '1300000', respectively. --- .../bindings/regulator/richtek,rt5739.yaml | 72 ++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 Documentation/devicetree/bindings/regulator/richtek,rt5739.yaml diff --git a/Documentation/devicetree/bindings/regulator/richtek,rt5739.yaml b/Documentation/devicetree/bindings/regulator/richtek,rt5739.yaml new file mode 100644 index 00000000..358297d --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/richtek,rt5739.yaml @@ -0,0 +1,72 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/regulator/richtek,rt5739.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Richtek RT5739 Step-Down Buck Converter + +maintainers: + - ChiYuan Huang + +description: | + The RT5739 is a step-down switching buck converter that can deliver the + programmable output voltage from 300mV to 1300mV with wide input voltage + supply of 2.5V to 5.5V. It can provide up to 3.5A continuous current + capability at over 80% high efficiency. + +allOf: + - $ref: regulator.yaml# + +properties: + compatible: + enum: + - richtek,rt5739 + + reg: + maxItems: 1 + + enable-gpios: + maxItems: 1 + + richtek,vsel-active-high: + description: | + If property is present, use the 'VSEL1' register group for buck control. + Else, use the 'VSEL0' register group. This depends on external hardware + 'VSEL' pin connection. + type: boolean + + regulator-allowed-modes: + description: | + buck allowed operating mode + 0: Auto PFM/PWM mode + 1: Forced PWM mode + items: + enum: [0, 1] + +required: + - compatible + - reg + +unevaluatedProperties: false + +examples: + - | + #include + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + regulator@50 { + compatible = "richtek,rt5739"; + reg = <0x50>; + enable-gpios = <&gpio26 1 GPIO_ACTIVE_HIGH>; + richtek,vsel-active-high; + regulator-name = "richtek,rt5739-buck"; + regulator-min-microvolt = <300000>; + regulator-max-microvolt = <1300000>; + regulator-allowed-modes = <0 1>; + regulator-boot-on; + }; + }; From patchwork Mon Mar 6 00:42:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: ChiYuan Huang X-Patchwork-Id: 64380 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp1594492wrd; Sun, 5 Mar 2023 16:54:07 -0800 (PST) X-Google-Smtp-Source: AK7set8E22IRC9sQ2oIMHqmjZSGB/XuhVyZlvlyX1dzs8P0VkoCIl1sxlqHFrRrV0jmYZWSkuKbF X-Received: by 2002:a05:6402:5154:b0:4af:5aa1:6646 with SMTP id n20-20020a056402515400b004af5aa16646mr7989495edd.14.1678064047335; Sun, 05 Mar 2023 16:54:07 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1678064047; cv=none; d=google.com; s=arc-20160816; b=Ub0jVjzh7eRMP8bGeJEWEzwSr0DKHyy2ZywwkbAFRGyOdLHxeIKHPS78RQippdKaFP IHLMJEr+EqHZw04hZzJmpnPOt30zJwDlZTno3Wy0gDDoZcB1RVjJulKkOiMsyL2/OWkv pOgwFM6WTlDDFCZDTMKHqkTPDlKI6VyEq5HZyENIZaRTOSJK/+5CU3uOIRQ6qi4OkqAC mdqQ66dkAKVqdDAAYsCXugYozXO9vL5hagdlDQEbtxrsCd87uKHMQOmo6gEJ95cXFMbG ahtFoI1hkFbCrBAcnzzIrZs2f1giMh5iCRnHIE437KSnETwW8oGtAAQ4Aqc9ebuJGGgz Xv1g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:references:in-reply-to:message-id :date:subject:cc:to:from; bh=zxEfhuj9QcjQTAWyID+etZH3qoNifCsPr0lS0JCEvqk=; b=Bz6HNoFj1CkagLy0ByCS9v7TuuNELqWnH56ISRUeDgv98fB/zqGxIezUVyPvQaQEdF MIKMoS4XLhFc42+TzN9FyM+EhCXoUeASKDBH66IbyjTW14Np0UeS1qtxSpGLFpiCyFIa H4GEEWU/6ra8bi1roowmQ+GppO3bSWMuZDMVzms9YGugjHm0vfHhO9r233cl7S8ZGBlA +0M3uxbwUnjgCw1Stvdg8Y1YWifspi5QuBnt6xRkvf3v6buz7Gm2rj5UpLk6TGIHmsOT oJMEAlfe6TH/LW9x/8OzSB2ub43pNWRp4bZoUb7GPq/LtMncJIgL5Yfx5QSy5nlcor/F q48A== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id h16-20020a1709063c1000b008c74c1150casi5365515ejg.519.2023.03.05.16.53.42; Sun, 05 Mar 2023 16:54:07 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229591AbjCFAnB (ORCPT + 99 others); Sun, 5 Mar 2023 19:43:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57048 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229494AbjCFAm7 (ORCPT ); Sun, 5 Mar 2023 19:42:59 -0500 Received: from mg.richtek.com (mg.richtek.com [220.130.44.152]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 4351F1738; Sun, 5 Mar 2023 16:42:55 -0800 (PST) X-MailGates: (flag:4,DYNAMIC,BADHELO,RELAY,NOHOST:PASS)(compute_score:DE LIVER,40,3) Received: from 192.168.10.46 by mg.richtek.com with MailGates ESMTP Server V5.0(16313:0:AUTH_RELAY) (envelope-from ); Mon, 06 Mar 2023 08:42:40 +0800 (CST) Received: from ex4.rt.l (192.168.10.47) by ex3.rt.l (192.168.10.46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.25; Mon, 6 Mar 2023 08:42:39 +0800 Received: from linuxcarl2.richtek.com (192.168.10.154) by ex4.rt.l (192.168.10.45) with Microsoft SMTP Server id 15.2.1118.25 via Frontend Transport; Mon, 6 Mar 2023 08:42:39 +0800 From: To: , , CC: , , , , Subject: [PATCH v3 2/2] regulator: Add support for Richtek RT5739 voltage regulator Date: Mon, 6 Mar 2023 08:42:38 +0800 Message-ID: <1678063358-18128-2-git-send-email-cy_huang@richtek.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1678063358-18128-1-git-send-email-cy_huang@richtek.com> References: <1678063358-18128-1-git-send-email-cy_huang@richtek.com> MIME-Version: 1.0 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1759577686704058477?= X-GMAIL-MSGID: =?utf-8?q?1759577686704058477?= From: ChiYuan Huang The RT5739 is a step-down switching voltage regulator that supports output voltage ragne from 300mV to 1300mV with the wide input supply voltage range from 2.5V to 5.5V. Signed-off-by: ChiYuan Huang --- drivers/regulator/Kconfig | 13 ++ drivers/regulator/Makefile | 1 + drivers/regulator/rt5739.c | 290 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 304 insertions(+) create mode 100644 drivers/regulator/rt5739.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 820c9a0..f7f992c 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -1112,6 +1112,19 @@ config REGULATOR_RT5190A buck converters, 1 LDO, mute AC OFF depop function, with the general I2C control interface. +config REGULATOR_RT5739 + tristate "Rcihtek RT5739 Regulator" + depends on I2C + select REGMAP_I2C + help + This adds support for voltage regulator in Richtek RT5739. + It's a step-down switching voltage regulator. Using a proprietary + architecture with synchronous rectification, it is capable of + delivering 3.5A continuously at over 80% efficiency. + + This driver can also be built as a module. If so, the module + will be called rt5739. + config REGULATOR_RT5759 tristate "Richtek RT5759 Regulator" depends on I2C diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index b9f5eb3..30a61fc 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -133,6 +133,7 @@ obj-$(CONFIG_REGULATOR_RT4831) += rt4831-regulator.o obj-$(CONFIG_REGULATOR_RT5033) += rt5033-regulator.o obj-$(CONFIG_REGULATOR_RT5120) += rt5120-regulator.o obj-$(CONFIG_REGULATOR_RT5190A) += rt5190a-regulator.o +obj-$(CONFIG_REGULATOR_RT5739) += rt5739.o obj-$(CONFIG_REGULATOR_RT5759) += rt5759-regulator.o obj-$(CONFIG_REGULATOR_RT6160) += rt6160-regulator.o obj-$(CONFIG_REGULATOR_RT6190) += rt6190-regulator.o diff --git a/drivers/regulator/rt5739.c b/drivers/regulator/rt5739.c new file mode 100644 index 00000000..0a9e102 --- /dev/null +++ b/drivers/regulator/rt5739.c @@ -0,0 +1,290 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Device driver for RT5739 regulator + * + * Copyright (C) 2023 Richtek Technology Corp. + * + * Author: ChiYuan Huang + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define RT5739_AUTO_MODE 0 +#define RT5739_FPWM_MODE 1 + +#define RT5739_REG_NSEL0 0x00 +#define RT5739_REG_NSEL1 0x01 +#define RT5739_REG_CNTL1 0x02 +#define RT5739_REG_ID1 0x03 +#define RT5739_REG_CNTL2 0x06 +#define RT5739_REG_CNTL4 0x08 + +#define RT5739_VSEL_MASK GENMASK(7, 0) +#define RT5739_MODEVSEL1_MASK BIT(1) +#define RT5739_MODEVSEL0_MASK BIT(0) +#define RT5739_VID_MASK GENMASK(7, 5) +#define RT5739_ACTD_MASK BIT(7) +#define RT5739_ENVSEL1_MASK BIT(1) +#define RT5739_ENVSEL0_MASK BIT(0) + +#define RT5739_VOLT_MINUV 300000 +#define RT5739_VOLT_MAXUV 1300000 +#define RT5739_VOLT_STPUV 5000 +#define RT5739_N_VOLTS 201 +#define RT5739_I2CRDY_TIMEUS 1000 + +static int rt5739_set_mode(struct regulator_dev *rdev, unsigned int mode) +{ + const struct regulator_desc *desc = rdev->desc; + struct regmap *regmap = rdev_get_regmap(rdev); + unsigned int mask, val; + + if (desc->vsel_reg == RT5739_REG_NSEL0) + mask = RT5739_MODEVSEL0_MASK; + else + mask = RT5739_MODEVSEL1_MASK; + + switch (mode) { + case REGULATOR_MODE_FAST: + val = mask; + break; + case REGULATOR_MODE_NORMAL: + val = 0; + break; + default: + return -EINVAL; + } + + return regmap_update_bits(regmap, RT5739_REG_CNTL1, mask, val); +} + +static unsigned int rt5739_get_mode(struct regulator_dev *rdev) +{ + const struct regulator_desc *desc = rdev->desc; + struct regmap *regmap = rdev_get_regmap(rdev); + unsigned int mask, val; + int ret; + + if (desc->vsel_reg == RT5739_REG_NSEL0) + mask = RT5739_MODEVSEL0_MASK; + else + mask = RT5739_MODEVSEL1_MASK; + + ret = regmap_read(regmap, RT5739_REG_CNTL1, &val); + if (ret) + return REGULATOR_MODE_INVALID; + + if (val & mask) + return REGULATOR_MODE_FAST; + + return REGULATOR_MODE_NORMAL; +} + +static int rt5739_set_suspend_voltage(struct regulator_dev *rdev, int uV) +{ + const struct regulator_desc *desc = rdev->desc; + struct regmap *regmap = rdev_get_regmap(rdev); + unsigned int reg, vsel; + + if (uV < RT5739_VOLT_MINUV || uV > RT5739_VOLT_MAXUV) + return -EINVAL; + + if (desc->vsel_reg == RT5739_REG_NSEL0) + reg = RT5739_REG_NSEL1; + else + reg = RT5739_REG_NSEL0; + + vsel = (uV - RT5739_VOLT_MINUV) / RT5739_VOLT_STPUV; + return regmap_write(regmap, reg, vsel); +} + +static int rt5739_set_suspend_enable(struct regulator_dev *rdev) +{ + const struct regulator_desc *desc = rdev->desc; + struct regmap *regmap = rdev_get_regmap(rdev); + unsigned int mask; + + if (desc->vsel_reg == RT5739_REG_NSEL0) + mask = RT5739_ENVSEL1_MASK; + else + mask = RT5739_ENVSEL0_MASK; + + return regmap_update_bits(regmap, desc->enable_reg, mask, mask); +} + +static int rt5739_set_suspend_disable(struct regulator_dev *rdev) +{ + const struct regulator_desc *desc = rdev->desc; + struct regmap *regmap = rdev_get_regmap(rdev); + unsigned int mask; + + if (desc->vsel_reg == RT5739_REG_NSEL0) + mask = RT5739_ENVSEL1_MASK; + else + mask = RT5739_ENVSEL0_MASK; + + return regmap_update_bits(regmap, desc->enable_reg, mask, 0); +} + +static int rt5739_set_suspend_mode(struct regulator_dev *rdev, + unsigned int mode) +{ + const struct regulator_desc *desc = rdev->desc; + struct regmap *regmap = rdev_get_regmap(rdev); + unsigned int mask, val; + + if (desc->vsel_reg == RT5739_REG_NSEL0) + mask = RT5739_MODEVSEL1_MASK; + else + mask = RT5739_MODEVSEL0_MASK; + + switch (mode) { + case REGULATOR_MODE_FAST: + val = mask; + break; + case REGULATOR_MODE_NORMAL: + val = 0; + break; + default: + return -EINVAL; + } + + return regmap_update_bits(regmap, RT5739_REG_CNTL1, mask, val); +} + +static const struct regulator_ops rt5739_regulator_ops = { + .list_voltage = regulator_list_voltage_linear, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .set_active_discharge = regulator_set_active_discharge_regmap, + .set_mode = rt5739_set_mode, + .get_mode = rt5739_get_mode, + .set_suspend_voltage = rt5739_set_suspend_voltage, + .set_suspend_enable = rt5739_set_suspend_enable, + .set_suspend_disable = rt5739_set_suspend_disable, + .set_suspend_mode = rt5739_set_suspend_mode, +}; + +static unsigned int rt5739_of_map_mode(unsigned int mode) +{ + switch (mode) { + case RT5739_AUTO_MODE: + return REGULATOR_MODE_NORMAL; + case RT5739_FPWM_MODE: + return REGULATOR_MODE_FAST; + default: + return REGULATOR_MODE_INVALID; + } +} + +static void rt5739_init_regulator_desc(struct regulator_desc *desc, + bool vsel_active_high) +{ + /* Fixed */ + desc->name = "rt5739-regulator"; + desc->owner = THIS_MODULE; + desc->ops = &rt5739_regulator_ops; + desc->n_voltages = RT5739_N_VOLTS; + desc->min_uV = RT5739_VOLT_MINUV; + desc->uV_step = RT5739_VOLT_STPUV; + desc->vsel_mask = RT5739_VSEL_MASK; + desc->enable_reg = RT5739_REG_CNTL2; + desc->active_discharge_reg = RT5739_REG_CNTL1; + desc->active_discharge_mask = RT5739_ACTD_MASK; + desc->active_discharge_on = RT5739_ACTD_MASK; + desc->of_map_mode = rt5739_of_map_mode; + + /* Assigned by vsel level */ + if (vsel_active_high) { + desc->vsel_reg = RT5739_REG_NSEL1; + desc->enable_mask = RT5739_ENVSEL1_MASK; + } else { + desc->vsel_reg = RT5739_REG_NSEL0; + desc->enable_mask = RT5739_ENVSEL0_MASK; + } +} + +static const struct regmap_config rt5739_regmap_config = { + .name = "rt5739", + .reg_bits = 8, + .val_bits = 8, + .max_register = RT5739_REG_CNTL4, +}; + +static int rt5739_probe(struct i2c_client *i2c) +{ + struct device *dev = &i2c->dev; + struct regulator_desc *desc; + struct regmap *regmap; + struct gpio_desc *enable_gpio; + struct regulator_config cfg = {}; + struct regulator_dev *rdev; + bool vsel_acth; + unsigned int vid; + int ret; + + desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL); + if (!desc) + return -ENOMEM; + + enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_HIGH); + if (IS_ERR(enable_gpio)) + return dev_err_probe(dev, PTR_ERR(enable_gpio), "Failed to get 'enable' gpio\n"); + else if (enable_gpio) + usleep_range(RT5739_I2CRDY_TIMEUS, RT5739_I2CRDY_TIMEUS + 1000); + + regmap = devm_regmap_init_i2c(i2c, &rt5739_regmap_config); + if (IS_ERR(regmap)) + return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n"); + + ret = regmap_read(regmap, RT5739_REG_ID1, &vid); + if (ret) + return dev_err_probe(dev, ret, "Failed to read VID\n"); + + /* RT5739: (VID & MASK) must be 0 */ + if (vid & RT5739_VID_MASK) + return dev_err_probe(dev, -ENODEV, "Incorrect VID (0x%02x)\n", vid); + + vsel_acth = device_property_read_bool(dev, "richtek,vsel-active-high"); + + rt5739_init_regulator_desc(desc, vsel_acth); + + cfg.dev = dev; + cfg.of_node = dev_of_node(dev); + cfg.init_data = of_get_regulator_init_data(dev, dev_of_node(dev), desc); + rdev = devm_regulator_register(dev, desc, &cfg); + if (IS_ERR(rdev)) + return dev_err_probe(dev, PTR_ERR(rdev), "Failed to register regulator\n"); + + return 0; +} + +static const struct of_device_id rt5739_device_table[] = { + { .compatible = "richtek,rt5739" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, rt5739_device_table); + +static struct i2c_driver rt5739_driver = { + .driver = { + .name = "rt5739", + .of_match_table = rt5739_device_table, + }, + .probe_new = rt5739_probe, +}; +module_i2c_driver(rt5739_driver); + +MODULE_AUTHOR("ChiYuan Huang "); +MODULE_DESCRIPTION("Richtek RT5739 regulator driver"); +MODULE_LICENSE("GPL");