From nobody Sun Apr 5 21:16:08 2026 Received: from mail-dy1-f174.google.com (mail-dy1-f174.google.com [74.125.82.174]) (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 3E9CE265621 for ; Tue, 24 Feb 2026 01:32:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.174 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771896753; cv=none; b=RKEIPqnfcB/ToNZr6/wRSu2s4H+YKC8cF2s4kvm2Dun4uXQbF60LFZ6tbwt3kaho44eGdDi6wUAnDk5cloSp9FiYOJw4wNX1w5QjQnaroPH7miKxS7eK2Q763mOJpgWbEnHIJQAQRridgBEqwmwsoMQxB90a3lDYlOBJHbGutFQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771896753; c=relaxed/simple; bh=r+E+unKyli7xWlqC1C59HfhiOBjmHQp6n1+NlQofa+4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=U/sYDrpU8xjqSCXRrWDOMxPoP6uaCR/jzhS02KEjYHTcsQy4tiBXHQbTsSRQ9iTJQuXLiMxV80DEDEpCPGrbDlNRgjoGDzkrHgwnilui3YniGHJDFYLw8uLNL5gbA5e5siG/e7FKzosHeDjifeqj+agpcw0/jzUNZ/HnxWkmvZw= 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=it8w3Avh; arc=none smtp.client-ip=74.125.82.174 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="it8w3Avh" Received: by mail-dy1-f174.google.com with SMTP id 5a478bee46e88-2b4520f6b32so6101595eec.0 for ; Mon, 23 Feb 2026 17:32:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1771896750; x=1772501550; 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=NyS44T5wbslTYzP2PkQi9qgSAlOK18ePJOg81jkekr4=; b=it8w3AvhbiXViEmx+ktTnrZMacm4r0F3YCW0P6/tOn16+50Xp36gsZTZx8DpNJmd2i wvmNT5VKlE9F2Hl0HHkxuAysYYbZ2071IG8J1mqSpSjtSiesdjsCZ8OsNy/1XVPjPbKi 8wkPVTGdvxfUYaPIbtu1Q+EgSwThtSLV7ZtoP4b4/8gueQUcpI/9LCKvZOBUv857Gd3z H4gzOO0JtiiIozxBNTBqVr95EbIg3hxGxjCEvPN5g0baAOKiG+yPL2vB6q8FVyrrWcLV usgYNoeNOxm/YL94H/FN0zUQ0VCmrAFb4JoUBcEBTET24XvlWHIX7gYOwwWkklonc3e5 lhrQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1771896750; x=1772501550; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=NyS44T5wbslTYzP2PkQi9qgSAlOK18ePJOg81jkekr4=; b=txl0BqpZb2rpyLREIXxApIqpWAppxoFyMCz988LXEATC5l9Je0Qo2AAfOoE26xLY1D Li+5gq29TlhAlh4iV1nr5FuP7iokeemMmZfpYcwaQcgXqaS2YF5tia0UxRk7x/W9mQo4 2ll1S3ebRib3J8vkAbD+nqnFfVnKDIe+LZun5UJHSHe4LG+Wa126hl9oYdeT0B44flxd 1W8fOb1imHsUo/mdxPWl4H6ePcwi4sAhH+qk17gL3Cln2Ym9CbE//S7ArUiTHSPn2dga CQm2RdvE2il2mSO3f5gtU0DcAsJR1E6yih6CPWp9C3/mmOkcheKcrqT1YFT9Elcm7Jcu s6vg== X-Forwarded-Encrypted: i=1; AJvYcCXntDGQmHzYcYsq1uSUTK3mTDLizRvzJRLzIM8ju/2lBCN0f+FIt62AaM5wJg+C4W5QVch4NQVDm0VXeYA=@vger.kernel.org X-Gm-Message-State: AOJu0YxOry39S+1IOgElO+Ojh1rNLm0PsTf16WWeOvkQRDEcovdHLi9w KNlLGnIXqlNUvpB7vT4LW/H3CaJpKxFgE0UyL7eNna3xK7Fp9WYG53J4 X-Gm-Gg: ATEYQzxtd45z9yptlctSHMu5F0HsB3+Kiq0999kqQyqOD9mewGhz7hGQHlOUh+dteCs Aae1Vgv08ZrSH91CdqN/vKUCBVfR4OUoGc9UFKuXk35zRggeHYpDkOExpKRIFW8s0rho8oRfGUj CEcERVNqESZcjiYpJZisSClxMbY4i0bWa/4QLHPYu6ZcRHlcbgLetdWCmBYQnOGkdpvfLKNfOEi XAb/gvNVK+GZZBHk5aQGkY6xVf1kP0ZcYSS/B4KW+rS9wPtmrEK4IdQiaa3uhPC3TJ5RrYQP0wS wqL2JGNVJlat8HTJG9dFnLRiC6anM9ZqgKnAhV7MDWGw8lN/XzjDwcNRa8ZOpMyAo46ITnYbFtc N+m3xtGXbV262xeBgsmAVonvpWtFLEH82ygfPupnvUBODprz6g+je3m1c/86Jyh1Nbtrj2TD8++ Bfuy/bAflXc0ecZ7dBjRO8HwT4xz0tfJzqEhNpbfozhSA+5uK0wvaM+f6KPqGrLntXuZuJbOT2C DQ= X-Received: by 2002:a05:7300:190a:b0:2b6:fa0c:6c44 with SMTP id 5a478bee46e88-2bd7b9f05d5mr4123876eec.12.1771896750328; Mon, 23 Feb 2026 17:32:30 -0800 (PST) Received: from lappy (108-228-232-20.lightspeed.sndgca.sbcglobal.net. [108.228.232.20]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2bd7daa027fsm6485015eec.9.2026.02.23.17.32.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Feb 2026 17:32:29 -0800 (PST) From: "Derek J. Clark" To: Jiri Kosina , Benjamin Tissoires Cc: Richard Hughes , Mario Limonciello , Zhixin Zhang , Mia Shao , Mark Pearson , "Pierre-Loup A . Griffais" , "Derek J . Clark" , linux-input@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 11/16] HID: hid-lenovo-go-s: Add MCU ID Attribute Date: Tue, 24 Feb 2026 01:32:12 +0000 Message-ID: <20260224013217.1363996-12-derekjohn.clark@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260224013217.1363996-1-derekjohn.clark@gmail.com> References: <20260224013217.1363996-1-derekjohn.clark@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" Adds command to probe for the MCU ID of the Lenovo Legion Go S Controller and assign it to a device attribute. Reviewed-by: Mark Pearson Signed-off-by: Derek J. Clark --- drivers/hid/hid-lenovo-go-s.c | 56 +++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) diff --git a/drivers/hid/hid-lenovo-go-s.c b/drivers/hid/hid-lenovo-go-s.c index d8d32a9c90512..cea015330c2b6 100644 --- a/drivers/hid/hid-lenovo-go-s.c +++ b/drivers/hid/hid-lenovo-go-s.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include #include @@ -34,8 +35,13 @@ struct hid_gos_cfg { struct completion send_cmd_complete; struct hid_device *hdev; struct mutex cfg_mutex; /*ensure single synchronous output report*/ + u8 mcu_id[12]; } drvdata; =20 +struct gos_cfg_attr { + u8 index; +}; + struct command_report { u8 cmd; u8 sub_cmd; @@ -70,6 +76,14 @@ static int hid_gos_version_event(u8 *data) return 0; } =20 +static int hid_gos_mcu_id_event(struct command_report *cmd_rep) +{ + drvdata.mcu_id[0] =3D cmd_rep->sub_cmd; + memcpy(&drvdata.mcu_id[1], cmd_rep->data, 11); + + return 0; +} + static u8 get_endpoint_address(struct hid_device *hdev) { struct usb_interface *intf =3D to_usb_interface(hdev->dev.parent); @@ -103,6 +117,9 @@ static int hid_gos_raw_event(struct hid_device *hdev, s= truct hid_report *report, case GET_VERSION: ret =3D hid_gos_version_event(data); break; + case GET_MCU_ID: + ret =3D hid_gos_mcu_id_event(cmd_rep); + break; default: ret =3D -EINVAL; break; @@ -157,10 +174,41 @@ static int mcu_property_out(struct hid_device *hdev, = u8 command, u8 index, return 0; } =20 +static ssize_t mcu_id_show(struct device *dev, struct device_attribute *at= tr, + char *buf) +{ + return sysfs_emit(buf, "%*phN\n", 12, &drvdata.mcu_id); +} + +/* MCU */ +static DEVICE_ATTR_RO(mcu_id); + +static struct attribute *legos_mcu_attrs[] =3D { + &dev_attr_mcu_id.attr, + NULL, +}; + +static const struct attribute_group mcu_attr_group =3D { + .attrs =3D legos_mcu_attrs, +}; + +static const struct attribute_group *top_level_attr_groups[] =3D { + &mcu_attr_group, + NULL, +}; + static void cfg_setup(struct work_struct *work) { int ret; =20 + /* MCU */ + ret =3D mcu_property_out(drvdata.hdev, GET_MCU_ID, FEATURE_NONE, 0, 0); + if (ret) { + dev_err(&drvdata.hdev->dev, "Failed to retrieve MCU ID: %i\n", + ret); + return; + } + ret =3D mcu_property_out(drvdata.hdev, GET_VERSION, FEATURE_NONE, 0, 0); if (ret) { dev_err(&drvdata.hdev->dev, "Failed to retrieve MCU Version: %i\n", ret); @@ -177,6 +225,13 @@ static int hid_gos_cfg_probe(struct hid_device *hdev, drvdata.hdev =3D hdev; mutex_init(&drvdata.cfg_mutex); =20 + ret =3D sysfs_create_groups(&hdev->dev.kobj, top_level_attr_groups); + if (ret) { + dev_err_probe(&hdev->dev, ret, + "Failed to create gamepad configuration attributes\n"); + return ret; + } + init_completion(&drvdata.send_cmd_complete); =20 /* Executing calls prior to returning from probe will lock the MCU. Sched= ule @@ -196,6 +251,7 @@ static void hid_gos_cfg_remove(struct hid_device *hdev) { guard(mutex)(&drvdata.cfg_mutex); cancel_delayed_work_sync(&drvdata.gos_cfg_setup); + sysfs_remove_groups(&hdev->dev.kobj, top_level_attr_groups); hid_hw_close(hdev); hid_hw_stop(hdev); hid_set_drvdata(hdev, NULL); --=20 2.52.0