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([188.163.112.70]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5fa778188acsm6937219a12.35.2025.05.06.00.32.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 May 2025 00:32:36 -0700 (PDT) From: Svyatoslav Ryhel To: MyungJoo Ham , Chanwoo Choi , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Svyatoslav Ryhel Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v3 1/2] dt-bindings: extcon: Document Maxim MAX14526 MUIC Date: Tue, 6 May 2025 10:32:15 +0300 Message-ID: <20250506073216.43059-2-clamor95@gmail.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250506073216.43059-1-clamor95@gmail.com> References: <20250506073216.43059-1-clamor95@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add bindings for Maxim MAX14526 MicroUSB Integrated Circuit. Signed-off-by: Svyatoslav Ryhel Reviewed-by: Krzysztof Kozlowski --- .../bindings/extcon/maxim,max14526.yaml | 80 +++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 Documentation/devicetree/bindings/extcon/maxim,max14526= .yaml diff --git a/Documentation/devicetree/bindings/extcon/maxim,max14526.yaml b= /Documentation/devicetree/bindings/extcon/maxim,max14526.yaml new file mode 100644 index 000000000000..7eb5918df1c2 --- /dev/null +++ b/Documentation/devicetree/bindings/extcon/maxim,max14526.yaml @@ -0,0 +1,80 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/extcon/maxim,max14526.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Maxim MAX14526 MicroUSB Integrated Circuit (MUIC) + +maintainers: + - Svyatoslav Ryhel + +properties: + compatible: + const: maxim,max14526 + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + connector: + $ref: /schemas/connector/usb-connector.yaml# + + port: + $ref: /schemas/graph.yaml#/properties/port + +required: + - compatible + - reg + - interrupts + - connector + - port + +unevaluatedProperties: false + +examples: + - | + #include + #include + + i2c { + #address-cells =3D <1>; + #size-cells =3D <0>; + + muic@44 { + compatible =3D "maxim,max14526"; + reg =3D <0x44>; + + interrupt-parent =3D <&gpio>; + interrupts =3D <72 IRQ_TYPE_EDGE_FALLING>; + + connector { + compatible =3D "usb-b-connector"; + label =3D "micro-USB"; + type =3D "micro"; + }; + + port { + #address-cells =3D <1>; + #size-cells =3D <0>; + + muic_to_charger: endpoint@0 { + reg =3D <0>; + remote-endpoint =3D <&charger_input>; + }; + + muic_to_usb: endpoint@1 { + reg =3D <1>; + remote-endpoint =3D <&usb_input>; + }; + + muic_to_mhl: endpoint@2 { + reg =3D <2>; + remote-endpoint =3D <&mhl_input>; + }; + }; + }; + }; +... --=20 2.48.1 From nobody Tue Dec 16 22:55:06 2025 Received: from mail-ed1-f42.google.com (mail-ed1-f42.google.com [209.85.208.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8D9EB21ADBA; Tue, 6 May 2025 07:32:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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([188.163.112.70]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5fa778188acsm6937219a12.35.2025.05.06.00.32.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 May 2025 00:32:37 -0700 (PDT) From: Svyatoslav Ryhel To: MyungJoo Ham , Chanwoo Choi , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Svyatoslav Ryhel Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v3 2/2] extcon: Add basic support for Maxim MAX14526 MUIC Date: Tue, 6 May 2025 10:32:16 +0300 Message-ID: <20250506073216.43059-3-clamor95@gmail.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250506073216.43059-1-clamor95@gmail.com> References: <20250506073216.43059-1-clamor95@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The MAX14526 is designed to simplify interface requirements on portable devices by multiplexing common inputs (USB, UART, Microphone, Stereo Audio and Composite Video) on a single micro/mini USB connector. The USB input supports Hi-Speed USB and the audio/video inputs feature negative rail signal operation allowing simple DC coupled accessories. These device allow a single micro/mini USB port to support all the common interfaces on Cellular phones and portable media players over the same external lines. Signed-off-by: Svyatoslav Ryhel --- drivers/extcon/Kconfig | 12 ++ drivers/extcon/Makefile | 1 + drivers/extcon/extcon-max14526.c | 302 +++++++++++++++++++++++++++++++ 3 files changed, 315 insertions(+) create mode 100644 drivers/extcon/extcon-max14526.c diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig index a6f6d467aacf..1096afc0b5bb 100644 --- a/drivers/extcon/Kconfig +++ b/drivers/extcon/Kconfig @@ -134,6 +134,18 @@ config EXTCON_MAX8997 Maxim MAX8997 PMIC. The MAX8997 MUIC is a USB port accessory detector and switch. =20 +config EXTCON_MAX14526 + tristate "Maxim MAX14526 EXTCON Support" + select IRQ_DOMAIN + select REGMAP_I2C + help + If you say yes here you get support for the Maxim MAX14526 + MUIC device. The MAX14526 MUIC is a USB port accessory + detector and switch. The MAX14526 is designed to simplify + interface requirements on portable devices by multiplexing + common inputs (USB, UART, Microphone, Stereo Audio and + Composite Video) on a single micro/mini USB connector. + config EXTCON_PALMAS tristate "Palmas USB EXTCON support" depends on MFD_PALMAS diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile index 0d6d23faf748..6482f2bfd661 100644 --- a/drivers/extcon/Makefile +++ b/drivers/extcon/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_EXTCON_MAX3355) +=3D extcon-max3355.o obj-$(CONFIG_EXTCON_MAX77693) +=3D extcon-max77693.o obj-$(CONFIG_EXTCON_MAX77843) +=3D extcon-max77843.o obj-$(CONFIG_EXTCON_MAX8997) +=3D extcon-max8997.o +obj-$(CONFIG_EXTCON_MAX14526) +=3D extcon-max14526.o obj-$(CONFIG_EXTCON_PALMAS) +=3D extcon-palmas.o obj-$(CONFIG_EXTCON_PTN5150) +=3D extcon-ptn5150.o obj-$(CONFIG_EXTCON_QCOM_SPMI_MISC) +=3D extcon-qcom-spmi-misc.o diff --git a/drivers/extcon/extcon-max14526.c b/drivers/extcon/extcon-max14= 526.c new file mode 100644 index 000000000000..f9e8ade56d45 --- /dev/null +++ b/drivers/extcon/extcon-max14526.c @@ -0,0 +1,302 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* I2C addresses of MUIC internal registers */ +#define MAX14526_DEVICE_ID 0x00 +#define MAX14526_ID 0x02 + +/* CONTROL_1 register masks */ +#define MAX14526_CONTROL_1 0x01 +#define ID_2P2 BIT(6) +#define ID_620 BIT(5) +#define ID_200 BIT(4) +#define VLDO BIT(3) +#define SEMREN BIT(2) +#define ADC_EN BIT(1) +#define CP_EN BIT(0) + +/* CONTROL_2 register masks */ +#define MAX14526_CONTROL_2 0x02 +#define INTPOL BIT(7) +#define INT_EN BIT(6) +#define MIC_LP BIT(5) +#define CP_AUD BIT(4) +#define CHG_TYPE BIT(1) +#define USB_DET_DIS BIT(0) + +/* SW_CONTROL register masks */ +#define MAX14526_SW_CONTROL 0x03 +#define SW_DATA 0x00 +#define SW_UART 0x01 +#define SW_AUDIO 0x02 +#define SW_OPEN 0x07 + +/* INT_STATUS register masks */ +#define MAX14526_INT_STAT 0x04 +#define CHGDET BIT(7) +#define MR_COMP BIT(6) +#define SENDEND BIT(5) +#define V_VBUS BIT(4) + +/* STATUS register masks */ +#define MAX14526_STATUS 0x05 +#define CPORT BIT(7) +#define CHPORT BIT(6) +#define C1COMP BIT(0) + +enum max14526_idno_resistance { + MAX14526_GND, + MAX14526_24KOHM, + MAX14526_56KOHM, + MAX14526_100KOHM, + MAX14526_130KOHM, + MAX14526_180KOHM, + MAX14526_240KOHM, + MAX14526_330KOHM, + MAX14526_430KOHM, + MAX14526_620KOHM, + MAX14526_910KOHM, + MAX14526_OPEN +}; + +enum max14526_field_idx { + VENDOR_ID, CHIP_REV, /* DEVID */ + DM, DP, /* SW_CONTROL */ + MAX14526_N_REGMAP_FIELDS +}; + +static const struct reg_field max14526_reg_field[MAX14526_N_REGMAP_FIELDS]= =3D { + [VENDOR_ID] =3D REG_FIELD(MAX14526_DEVICE_ID, 4, 7), + [CHIP_REV] =3D REG_FIELD(MAX14526_DEVICE_ID, 0, 3), + [DM] =3D REG_FIELD(MAX14526_SW_CONTROL, 0, 2), + [DP] =3D REG_FIELD(MAX14526_SW_CONTROL, 3, 5), +}; + +struct max14526_data { + struct i2c_client *client; + struct extcon_dev *edev; + + struct regmap *regmap; + struct regmap_field *rfield[MAX14526_N_REGMAP_FIELDS]; + + int last_state; + int cable; +}; + +enum max14526_muic_modes { + MAX14526_OTG =3D MAX14526_GND, /* no power */ + MAX14526_MHL =3D MAX14526_56KOHM, /* no power */ + MAX14526_OTG_Y =3D MAX14526_GND | V_VBUS, + MAX14526_MHL_CHG =3D MAX14526_GND | V_VBUS | CHGDET, + MAX14526_NONE =3D MAX14526_OPEN, + MAX14526_USB =3D MAX14526_OPEN | V_VBUS, + MAX14526_CHG =3D MAX14526_OPEN | V_VBUS | CHGDET, +}; + +static const unsigned int max14526_extcon_cable[] =3D { + EXTCON_USB, + EXTCON_USB_HOST, + EXTCON_CHG_USB_FAST, + EXTCON_DISP_MHL, + EXTCON_NONE, +}; + +static int max14526_ap_usb_mode(struct max14526_data *priv) +{ + struct device *dev =3D &priv->client->dev; + int ret; + + /* Enable USB Path */ + ret =3D regmap_field_write(priv->rfield[DM], SW_DATA); + if (ret) + return ret; + + ret =3D regmap_field_write(priv->rfield[DP], SW_DATA); + if (ret) + return ret; + + /* Enable 200K, Charger Pump and ADC */ + ret =3D regmap_write(priv->regmap, MAX14526_CONTROL_1, + ID_200 | ADC_EN | CP_EN); + if (ret) + return ret; + + dev_dbg(dev, "AP USB mode set\n"); + + return 0; +} + +static irqreturn_t max14526_interrupt(int irq, void *dev_id) +{ + struct max14526_data *priv =3D dev_id; + struct device *dev =3D &priv->client->dev; + int state, ret; + + /* + * Upon an MUIC IRQ (MUIC_INT_N falls), wait at least 70ms + * before reading INT_STAT and STATUS. After the reads, + * MUIC_INT_N returns to high (but the INT_STAT and STATUS + * contents will be held). + */ + msleep(100); + + ret =3D regmap_read(priv->regmap, MAX14526_INT_STAT, &state); + if (ret) + dev_err(dev, "failed to read MUIC state %d\n", ret); + + if (state =3D=3D priv->last_state) + return IRQ_HANDLED; + + /* Detach previous device */ + extcon_set_state_sync(priv->edev, priv->cable, false); + + switch (state) { + case MAX14526_USB: + priv->cable =3D EXTCON_USB; + break; + + case MAX14526_CHG: + priv->cable =3D EXTCON_CHG_USB_FAST; + break; + + case MAX14526_OTG: + case MAX14526_OTG_Y: + priv->cable =3D EXTCON_USB_HOST; + break; + + case MAX14526_MHL: + case MAX14526_MHL_CHG: + priv->cable =3D EXTCON_DISP_MHL; + break; + + case MAX14526_NONE: + default: + priv->cable =3D EXTCON_NONE; + break; + } + + extcon_set_state_sync(priv->edev, priv->cable, true); + + priv->last_state =3D state; + + return IRQ_HANDLED; +} + +static const struct regmap_config max14526_regmap_config =3D { + .reg_bits =3D 8, + .val_bits =3D 8, + .max_register =3D MAX14526_STATUS, +}; + +static int max14526_probe(struct i2c_client *client) +{ + struct device *dev =3D &client->dev; + struct max14526_data *priv; + int ret, dev_id, rev, i; + + priv =3D devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->client =3D client; + i2c_set_clientdata(client, priv); + + priv->regmap =3D devm_regmap_init_i2c(client, &max14526_regmap_config); + if (IS_ERR(priv->regmap)) + return dev_err_probe(dev, PTR_ERR(priv->regmap), "cannot allocate regmap= \n"); + + for (i =3D 0; i < MAX14526_N_REGMAP_FIELDS; i++) { + priv->rfield[i] =3D devm_regmap_field_alloc(dev, priv->regmap, + max14526_reg_field[i]); + if (IS_ERR(priv->rfield[i])) + return dev_err_probe(dev, PTR_ERR(priv->rfield[i]), + "cannot allocate regmap field\n"); + } + + /* Detect if MUIC version is supported */ + ret =3D regmap_field_read(priv->rfield[VENDOR_ID], &dev_id); + if (ret) + return dev_err_probe(dev, ret, "failed to read MUIC ID\n"); + + regmap_field_read(priv->rfield[CHIP_REV], &rev); + + if (dev_id =3D=3D MAX14526_ID) + dev_info(dev, "detected MAX14526 MUIC with id 0x%x, rev 0x%x\n", dev_id,= rev); + else + dev_err_probe(dev, -EINVAL, "MUIC vendor id 0x%X is not recognized\n", d= ev_id); + + priv->edev =3D devm_extcon_dev_allocate(dev, max14526_extcon_cable); + if (IS_ERR(priv->edev)) + return dev_err_probe(dev, (IS_ERR(priv->edev)), + "failed to allocate extcon device\n"); + + ret =3D devm_extcon_dev_register(dev, priv->edev); + if (ret < 0) + return dev_err_probe(dev, ret, "failed to register extcon device\n"); + + ret =3D max14526_ap_usb_mode(priv); + if (ret < 0) + return dev_err_probe(dev, ret, "failed to set AP USB mode\n"); + + regmap_write_bits(priv->regmap, MAX14526_CONTROL_2, INT_EN, INT_EN); + regmap_write_bits(priv->regmap, MAX14526_CONTROL_2, USB_DET_DIS, (u32)~US= B_DET_DIS); + + ret =3D devm_request_threaded_irq(dev, client->irq, NULL, &max14526_inter= rupt, + IRQF_ONESHOT | IRQF_SHARED, client->name, priv); + if (ret) + return dev_err_probe(dev, ret, "failed to register IRQ\n"); + + irq_wake_thread(client->irq, priv); + + return 0; +} + +static int max14526_resume(struct device *dev) +{ + struct i2c_client *client =3D to_i2c_client(dev); + struct max14526_data *priv =3D i2c_get_clientdata(client); + + irq_wake_thread(client->irq, priv); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(max14526_pm_ops, NULL, max14526_resume); + +static const struct of_device_id max14526_match[] =3D { + { .compatible =3D "maxim,max14526" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, max14526_match); + +static const struct i2c_device_id max14526_id[] =3D { + { "max14526" }, + { } +}; +MODULE_DEVICE_TABLE(i2c, max14526_id); + +static struct i2c_driver max14526_driver =3D { + .driver =3D { + .name =3D "max14526", + .of_match_table =3D max14526_match, + .pm =3D &max14526_pm_ops, + }, + .probe =3D max14526_probe, + .id_table =3D max14526_id, +}; +module_i2c_driver(max14526_driver); + +MODULE_AUTHOR("Svyatoslav Ryhel "); +MODULE_DESCRIPTION("MAX14526 extcon driver to support MUIC"); +MODULE_LICENSE("GPL"); --=20 2.48.1