From patchwork Tue Jan 14 03:30:06 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ming Yu X-Patchwork-Id: 13938356 Received: from mail-pl1-f179.google.com (mail-pl1-f179.google.com [209.85.214.179]) (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 E1341231A54; Tue, 14 Jan 2025 03:30:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.179 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736825440; cv=none; b=PM23Fq4RfN3mGSbX/DsSXieWMndE9XATjEAog2ucJRS2RCXe8UUqKiJyGIgjpGo0m1qhsOrFA/LzCyRLB1kZGTbRHBLi8IHO6JuRm3he7Jm6mjQpwnZxllbY53NRPNZJbonjnywF6X4/2zCyChvP+i3H2VrXw+F6Q2cmnHRYDEs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736825440; c=relaxed/simple; bh=prZNoX4edYcGSUid7EY+pr0eXJn0Fg/+a5q+1fBgN6s=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=jc8fGuMm+kiiU4bfTVAq6VCmw2mlbYm2DinZkeUl0Qpo1eYsXePmH2H0dKOU4siwyiIseW978kriqYFB/LHo6CMNjrl6FVmlK/ZtL+x70qCkLYDfehDKE9zv08ZppXvZFjts0XxrwB08iyV4jIWezql4RvaUJWmdlZnak1tN3/Q= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=KYaV34Af; arc=none smtp.client-ip=209.85.214.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="KYaV34Af" Received: by mail-pl1-f179.google.com with SMTP id d9443c01a7336-21654fdd5daso84886565ad.1; Mon, 13 Jan 2025 19:30:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1736825438; x=1737430238; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=MIhh+CjnkRORhsX4Je/ArH+6qKnVLW1QQRzWbrojpNw=; b=KYaV34Aft5pOxapDSwYPPU+6zDkIia7mB7We3QcqT4ZHluYxO649gqJPhDTDIc3Hcz 1CieBI/MfefVBPqyCpOZUWR97p0iOjUo76/zyikumeEdP80SkKQrdxTTXFQLp8qj2+1L KBRn6MZj0LvMWA2RA/o7EOLCHHkX5gwu72P1zxiVZp7pFmgFA8ImqlwaQt458gLzyIxd KYplxF4gUqFRVASo6BA66TUlR+6e1rj6HDb0UiuOi2n4virCXV5tCSLQj5/KqYCVbBNd sXMRD8z+Ij1s+1E0mTvLzetPkfoQAw/wCTOA3WZDh3tER2FiweOItRFj30RI3QSnu4l8 nI6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1736825438; x=1737430238; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=MIhh+CjnkRORhsX4Je/ArH+6qKnVLW1QQRzWbrojpNw=; b=Uz4Ad+LAEIb4h1dOeJTh2Us4/LBMSe7hjboEEzajT4fkgfHUJglH/HPutRyAbysevv ICxnSPKNd5dtRIaQNb3niE0R8RcqDSSQET0FAPVr4jTHyMA6QOjJbc53qvCzkt6JnB5L ttBY6ueRgUJquepDPq04TWWuzDbfx9pznvZIzrsnYQEvSD16otYsx9MIFfmmLReSBhwj BQlXyenQkP3rvwQZOhtYShyuw0Trs7Gr/kXmpbwv3ypMOV0glswO37lyuWoe2z8zY1Uc U6GibLQqH5tLgmMLs2ZZiOkWe9JlNffxxjDFKp3CYNqhhbL3sIDTFdo6pLfxmyLCle+r Ocmw== X-Forwarded-Encrypted: i=1; AJvYcCU4Mqgz7cCxn6hxUdj2WlsHQg8Idy5o9JhKPTP9HPYxAGtx1GwjlhePQvEzHoM4U5MMmWcjOrCFPNwd@vger.kernel.org, AJvYcCVB3sRJcoIxut06O1gHfyWNRfYKDodryYHZFovdXrH54rCZYhTanr6pxcgIn6BbNmhlhrCVqdGKTNs=@vger.kernel.org, AJvYcCVX4DWMlUfWptp7oKcmRPpiFOx72oFR0n0+vTq1NizR9mdOu9ThQ+TMLJtZfv7/WGGqb+NKf9t27PGuIorW7vM=@vger.kernel.org, AJvYcCVktxYYVL4Cuef5Ob9cdxXbg5ed51M3S6bNT4bjIpxflVJwophyXoU1albTYBrOvDKodx8Mcy2tPvd1yQ==@vger.kernel.org, AJvYcCWDuM5HIuonxmF4CZQUhi++m08zJXnRwVT7FUDw4QBQ0sgMAlYc1vaf2oLYEZV1vZeNSBl2XeVbNChn@vger.kernel.org, AJvYcCX4LuHX5ahsZyUFQzjraqM/+yk3o4T1zeRKrKpZ+6ewEIRBzLY3Q4kzFdNVMxY9UrY8d5oRZzwAlmdFj+g=@vger.kernel.org, AJvYcCXB16hk6FNMTM+upmBc2W4t1oVK25+cAZeQ6M03zgV3P7pWKr0AYrJKpiQJzIQTQ2tS8uPRm7jf@vger.kernel.org, AJvYcCXowxnyEsHJSPmqwGSGGd0/ButsqD+XAnUFlBd8nJT7p8XUqQySyoGsmqSsVN3OJIrjtszwacm0l3Jv@vger.kernel.org X-Gm-Message-State: AOJu0YyVK0OQ/2fNGxRyHiU4r6rnJit4xnce9xPaCtugKZYrIFHBGpY9 GUG/YB7Fc/gq8fkAnFcGWhA5TXEdsiT31bkTTlj7cnOaJXu5DVD3 X-Gm-Gg: ASbGncvS/TVoOqR3OCeE8xXZNLveVZvQ1DpiR/8IH29JUCABxlt6wmfhTUU47onGCAf oFfceT2ZYakeKqxkcrwMOGrg4MrQW24cj+RESlsURc6OPIZa26RL+bXEj9zmRepGO6j9lODqDnA qAtbJQPEPKHmNfqrWByH3lFAsi2WDcctaTJ0/kMNCdmoKL+nnkJ8d958klb6v/3PoaPwL5YW894 sAc9Ni7G2u0XP2Wa1Zm9hlOysSqZ+nTGK7LUtASC8cZV1QC1RQldUKjtFvNy6qq1OVP7c9A19y8 Een9tp58nVgRkJ/e1QscUEg6 X-Google-Smtp-Source: AGHT+IH+vafbbYouzCkmmSvb6/L6mWNfaqk/WjTtXqMuBtrPaah2aqvmDZzONTzIY4xWgLCu6pvjnA== X-Received: by 2002:a05:6a00:39a7:b0:728:e382:5f14 with SMTP id d2e1a72fcca58-72d21f314e9mr27603927b3a.9.1736825438124; Mon, 13 Jan 2025 19:30:38 -0800 (PST) Received: from hcdev-d520mt2.. (60-250-196-139.hinet-ip.hinet.net. [60.250.196.139]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-72d40658b71sm6595400b3a.85.2025.01.13.19.30.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Jan 2025 19:30:37 -0800 (PST) From: Ming Yu To: tmyu0@nuvoton.com, lee@kernel.org, linus.walleij@linaro.org, brgl@bgdev.pl, andi.shyti@kernel.org, mkl@pengutronix.de, mailhol.vincent@wanadoo.fr, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, wim@linux-watchdog.org, linux@roeck-us.net, jdelvare@suse.com, alexandre.belloni@bootlin.com Cc: linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-i2c@vger.kernel.org, linux-can@vger.kernel.org, netdev@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-rtc@vger.kernel.org, linux-usb@vger.kernel.org, Ming Yu Subject: [PATCH v5 3/7] i2c: Add Nuvoton NCT6694 I2C support Date: Tue, 14 Jan 2025 11:30:06 +0800 Message-Id: <20250114033010.2445925-4-a0282524688@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250114033010.2445925-1-a0282524688@gmail.com> References: <20250114033010.2445925-1-a0282524688@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This driver supports I2C adapter functionality for NCT6694 MFD device based on USB interface, each I2C controller use default baudrate(100K). Signed-off-by: Ming Yu --- MAINTAINERS | 1 + drivers/i2c/busses/Kconfig | 10 ++ drivers/i2c/busses/Makefile | 1 + drivers/i2c/busses/i2c-nct6694.c | 157 +++++++++++++++++++++++++++++++ 4 files changed, 169 insertions(+) create mode 100644 drivers/i2c/busses/i2c-nct6694.c diff --git a/MAINTAINERS b/MAINTAINERS index f752051f4c3b..4e72f749cdf2 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -16722,6 +16722,7 @@ M: Ming Yu L: linux-kernel@vger.kernel.org S: Supported F: drivers/gpio/gpio-nct6694.c +F: drivers/i2c/busses/i2c-nct6694.c F: drivers/mfd/nct6694.c F: include/linux/mfd/nct6694.h diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig index ceb3ecdf884b..a3f60e6953bd 100644 --- a/drivers/i2c/busses/Kconfig +++ b/drivers/i2c/busses/Kconfig @@ -1328,6 +1328,16 @@ config I2C_LJCA This driver can also be built as a module. If so, the module will be called i2c-ljca. +config I2C_NCT6694 + tristate "Nuvoton NCT6694 I2C adapter support" + depends on MFD_NCT6694 + help + If you say yes to this option, support will be included for Nuvoton + NCT6694, a USB to I2C interface. + + This driver can also be built as a module. If so, the module will + be called i2c-nct6694. + config I2C_CP2615 tristate "Silicon Labs CP2615 USB sound card and I2C adapter" depends on USB diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile index 1c2a4510abe4..c5a60116dd54 100644 --- a/drivers/i2c/busses/Makefile +++ b/drivers/i2c/busses/Makefile @@ -133,6 +133,7 @@ obj-$(CONFIG_I2C_GXP) += i2c-gxp.o obj-$(CONFIG_I2C_DIOLAN_U2C) += i2c-diolan-u2c.o obj-$(CONFIG_I2C_DLN2) += i2c-dln2.o obj-$(CONFIG_I2C_LJCA) += i2c-ljca.o +obj-$(CONFIG_I2C_NCT6694) += i2c-nct6694.o obj-$(CONFIG_I2C_CP2615) += i2c-cp2615.o obj-$(CONFIG_I2C_PARPORT) += i2c-parport.o obj-$(CONFIG_I2C_PCI1XXXX) += i2c-mchp-pci1xxxx.o diff --git a/drivers/i2c/busses/i2c-nct6694.c b/drivers/i2c/busses/i2c-nct6694.c new file mode 100644 index 000000000000..49e8110662e2 --- /dev/null +++ b/drivers/i2c/busses/i2c-nct6694.c @@ -0,0 +1,157 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Nuvoton NCT6694 I2C adapter driver based on USB interface. + * + * Copyright (C) 2024 Nuvoton Technology Corp. + */ + +#include +#include +#include +#include +#include +#include + +/* + * USB command module type for NCT6694 I2C controller. + * This defines the module type used for communication with the NCT6694 + * I2C controller over the USB interface. + */ +#define NCT6694_I2C_MOD 0x03 + +/* Command 00h - I2C Deliver */ +#define NCT6694_I2C_DELIVER 0x00 +#define NCT6694_I2C_DELIVER_SEL 0x00 + +enum i2c_baudrate { + I2C_BR_25K = 0, + I2C_BR_50K, + I2C_BR_100K, + I2C_BR_200K, + I2C_BR_400K, + I2C_BR_800K, + I2C_BR_1M +}; + +struct __packed nct6694_i2c_deliver { + u8 port; + u8 br; + u8 addr; + u8 w_cnt; + u8 r_cnt; + u8 rsv[11]; + u8 write_data[0x40]; + u8 read_data[0x40]; +}; + +struct nct6694_i2c_data { + struct nct6694 *nct6694; + struct i2c_adapter adapter; + struct nct6694_i2c_deliver *deliver; + unsigned char port; + unsigned char br; +}; + +static int nct6694_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) +{ + struct nct6694_i2c_data *data = adap->algo_data; + struct nct6694_i2c_deliver *deliver = data->deliver; + struct nct6694_cmd_header cmd_hd = { + .mod = NCT6694_I2C_MOD, + .cmd = NCT6694_I2C_DELIVER, + .sel = NCT6694_I2C_DELIVER_SEL, + .len = cpu_to_le16(sizeof(*deliver)) + }; + int ret, i; + + for (i = 0; i < num ; i++) { + struct i2c_msg *msg_temp = &msgs[i]; + + memset(deliver, 0, sizeof(*deliver)); + + if (msg_temp->len > 64) + return -EPROTO; + + deliver->port = data->port; + deliver->br = data->br; + deliver->addr = i2c_8bit_addr_from_msg(msg_temp); + if (msg_temp->flags & I2C_M_RD) { + deliver->r_cnt = msg_temp->len; + ret = nct6694_write_msg(data->nct6694, &cmd_hd, deliver); + if (ret < 0) + return ret; + + memcpy(msg_temp->buf, deliver->read_data, msg_temp->len); + } else { + deliver->w_cnt = msg_temp->len; + memcpy(deliver->write_data, msg_temp->buf, msg_temp->len); + ret = nct6694_write_msg(data->nct6694, &cmd_hd, deliver); + if (ret < 0) + return ret; + } + } + + return num; +} + +static u32 nct6694_func(struct i2c_adapter *adapter) +{ + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; +} + +static const struct i2c_algorithm algorithm = { + .master_xfer = nct6694_xfer, + .functionality = nct6694_func, +}; + +static int nct6694_i2c_probe(struct platform_device *pdev) +{ + const struct mfd_cell *cell = mfd_get_cell(pdev); + struct nct6694 *nct6694 = dev_get_drvdata(pdev->dev.parent); + struct nct6694_i2c_data *data; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->deliver = devm_kzalloc(&pdev->dev, sizeof(struct nct6694_i2c_deliver), + GFP_KERNEL); + if (!data->deliver) + return -ENOMEM; + + data->nct6694 = nct6694; + data->port = cell->id; + data->br = I2C_BR_100K; + + sprintf(data->adapter.name, "NCT6694 I2C Adapter %d", cell->id); + data->adapter.owner = THIS_MODULE; + data->adapter.algo = &algorithm; + data->adapter.dev.parent = &pdev->dev; + data->adapter.algo_data = data; + + platform_set_drvdata(pdev, data); + + return i2c_add_adapter(&data->adapter); +} + +static void nct6694_i2c_remove(struct platform_device *pdev) +{ + struct nct6694_i2c_data *data = platform_get_drvdata(pdev); + + i2c_del_adapter(&data->adapter); +} + +static struct platform_driver nct6694_i2c_driver = { + .driver = { + .name = "nct6694-i2c", + }, + .probe = nct6694_i2c_probe, + .remove = nct6694_i2c_remove, +}; + +module_platform_driver(nct6694_i2c_driver); + +MODULE_DESCRIPTION("USB-I2C adapter driver for NCT6694"); +MODULE_AUTHOR("Ming Yu "); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:nct6694-i2c");