From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 01D7417A309; Thu, 10 Apr 2025 06:04:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744265094; cv=none; b=K7UkSybUxqXo5+BsySUIjEH2Xewo5xz7VwerWgasqNCCRlO4fBXxFf7b9goCc8ATaY65rPEglbsQv6IcV30wzGpLj1rAY16roLcbIu8N1+6dahDpEPzgsha9Y7E7Rh5/oKk2N2pZIF+kN7CKcCxH9n4ek0ZeN0fUfEAJdfCmrqk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744265094; c=relaxed/simple; bh=FYrBWSCKFVtEQ8dqrWonuh8PblTo1bjrFXM916oA1Z8=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=HKtiSsZ7q+JTHiudKcdNxJOWOjo6CXzAez8xJ+IrfQvewV06WJU+g4aPQxRW8GWwECj5ueg+jvIAEKMhqlnzogGyTy2VeOE/VntdzYsIdlrCYTKL32bpeGW4AV+h9w3zBibsEy90C5lwK+2s2tHq/1+9c9xb3V1bJ4TDSSckal0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=pE6bNzha; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="pE6bNzha" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C720EC4CEE8; Thu, 10 Apr 2025 06:04:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744265093; bh=FYrBWSCKFVtEQ8dqrWonuh8PblTo1bjrFXM916oA1Z8=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=pE6bNzhaXcXOVCREnHA9o+CvitfxrvKq4sQ8deVGbMdDCLRhGoX/LalA91CeAbe24 9X3bAWjtstpdxGKLt3vxoGsjQj7oM/WM7Xo4778mqYlrztV9TOz9PVAhooXj35XDZV 6k/SlLjwchM7YQjuusm1VP+UC9o+5R6U62fVaaLCVNI+Cx2qQ+JVxEZgp/HiarRnLu pJqYY5blC7Zr1sCy5uerI3dXcdekHYjBzbZhzpbv9E7s9FEgV0WdG+62Im2dlAySfb ySMiUXnuQNVO3akeP3JoKh31HY6WOGig4Va/c0PA8eA2sPpUcpkURLrayFoVt3PyBi oSjLCjHLVXWwA== Message-ID: <11d2541e-580b-4060-ad92-ed721e98793e@kernel.org> Date: Thu, 10 Apr 2025 08:04:45 +0200 Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v9 1/7] mfd: Add core driver for Nuvoton NCT6694 To: a0282524688@gmail.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 References: <20250409082752.3697532-1-tmyu0@nuvoton.com> <20250409082752.3697532-2-tmyu0@nuvoton.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 09/04/2025 10:27, a0282524688@gmail.com wrote: > + > +static int nct6694_response_err_handling(struct nct6694 *nct6694, > + unsigned char err_status) > +{ > + switch (err_status) { > + case NCT6694_NO_ERROR: > + return 0; > + case NCT6694_NOT_SUPPORT_ERROR: > + dev_err(nct6694->dev, "Command is not supported!\n"); > + break; > + case NCT6694_NO_RESPONSE_ERROR: > + dev_warn(nct6694->dev, "Command received no response!\n"); > + break; > + case NCT6694_TIMEOUT_ERROR: > + dev_warn(nct6694->dev, "Command timed out!\n"); > + break; > + case NCT6694_PENDING: > + dev_err(nct6694->dev, "Command is pending!\n"); > + break; > + default: > + return -EINVAL; > + } > + > + return -EIO; > +} > + Missing Kconfig. Exported functions are supposed to have it. > +int nct6694_read_msg(struct nct6694 *nct6694, const struct nct6694_cmd_header *cmd_hd, void *buf) > +{ > + union nct6694_usb_msg *msg = nct6694->usb_msg; > + struct usb_device *udev = nct6694->udev; > + int tx_len, rx_len, ret; > + > + guard(mutex)(&nct6694->access_lock); > + > + memcpy(&msg->cmd_header, cmd_hd, sizeof(*cmd_hd)); > + msg->cmd_header.hctrl = NCT6694_HCTRL_GET; > + > + /* Send command packet to USB device */ > + ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, NCT6694_BULK_OUT_EP), &msg->cmd_header, > + sizeof(*msg), &tx_len, NCT6694_URB_TIMEOUT); > + if (ret) > + return ret; > + > + /* Receive response packet from USB device */ > + ret = usb_bulk_msg(udev, usb_rcvbulkpipe(udev, NCT6694_BULK_IN_EP), &msg->response_header, > + sizeof(*msg), &rx_len, NCT6694_URB_TIMEOUT); > + if (ret) > + return ret; > + > + /* Receive data packet from USB device */ > + ret = usb_bulk_msg(udev, usb_rcvbulkpipe(udev, NCT6694_BULK_IN_EP), buf, > + le16_to_cpu(cmd_hd->len), &rx_len, NCT6694_URB_TIMEOUT); > + if (ret) > + return ret; > + > + if (rx_len != le16_to_cpu(cmd_hd->len)) { > + dev_err(nct6694->dev, "Expected received length %d, but got %d\n", > + le16_to_cpu(cmd_hd->len), rx_len); > + return -EIO; > + } > + > + return nct6694_response_err_handling(nct6694, msg->response_header.sts); > +} > +EXPORT_SYMBOL(nct6694_read_msg); GPL > + > +int nct6694_write_msg(struct nct6694 *nct6694, const struct nct6694_cmd_header *cmd_hd, void *buf) > +{ > + union nct6694_usb_msg *msg = nct6694->usb_msg; > + struct usb_device *udev = nct6694->udev; > + int tx_len, rx_len, ret; > + > + guard(mutex)(&nct6694->access_lock); > + > + memcpy(&msg->cmd_header, cmd_hd, sizeof(*cmd_hd)); > + msg->cmd_header.hctrl = NCT6694_HCTRL_SET; > + > + /* Send command packet to USB device */ > + ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, NCT6694_BULK_OUT_EP), &msg->cmd_header, > + sizeof(*msg), &tx_len, NCT6694_URB_TIMEOUT); > + if (ret) > + return ret; > + > + /* Send data packet to USB device */ > + ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, NCT6694_BULK_OUT_EP), buf, > + le16_to_cpu(cmd_hd->len), &tx_len, NCT6694_URB_TIMEOUT); > + if (ret) > + return ret; > + > + /* Receive response packet from USB device */ > + ret = usb_bulk_msg(udev, usb_rcvbulkpipe(udev, NCT6694_BULK_IN_EP), &msg->response_header, > + sizeof(*msg), &rx_len, NCT6694_URB_TIMEOUT); > + if (ret) > + return ret; > + > + /* Receive data packet from USB device */ > + ret = usb_bulk_msg(udev, usb_rcvbulkpipe(udev, NCT6694_BULK_IN_EP), buf, > + le16_to_cpu(cmd_hd->len), &rx_len, NCT6694_URB_TIMEOUT); > + if (ret) > + return ret; > + > + if (rx_len != le16_to_cpu(cmd_hd->len)) { > + dev_err(nct6694->dev, "Expected transmitted length %d, but got %d\n", > + le16_to_cpu(cmd_hd->len), rx_len); > + return -EIO; > + } > + > + return nct6694_response_err_handling(nct6694, msg->response_header.sts); > +} > +EXPORT_SYMBOL(nct6694_write_msg); > + Same comments. Best regards, Krzysztof