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[108.228.232.20]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2be81209142sm721925eec.12.2026.03.10.00.29.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Mar 2026 00:29:53 -0700 (PDT) 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 v6 13/19] HID: hid-lenovo-go-s: Add Touchpad Mode Attributes Date: Tue, 10 Mar 2026 07:29:31 +0000 Message-ID: <20260310072937.3295875-14-derekjohn.clark@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260310072937.3295875-1-derekjohn.clark@gmail.com> References: <20260310072937.3295875-1-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 attributes for managing the touchpad operating modes. Reviewed-by: Mark Pearson Signed-off-by: Derek J. Clark --- v6: - Make local attributes static. - Use NULL instead of 0 in mcu_propery_out when there is no data. --- drivers/hid/hid-lenovo-go-s.c | 142 ++++++++++++++++++++++++++++++++++ 1 file changed, 142 insertions(+) diff --git a/drivers/hid/hid-lenovo-go-s.c b/drivers/hid/hid-lenovo-go-s.c index 97c572cfe66c..5899cabe950f 100644 --- a/drivers/hid/hid-lenovo-go-s.c +++ b/drivers/hid/hid-lenovo-go-s.c @@ -47,6 +47,8 @@ static struct hid_gos_cfg { u8 os_mode; u8 rgb_en; u8 tp_en; + u8 tp_linux_mode; + u8 tp_windows_mode; } drvdata; =20 struct gos_cfg_attr { @@ -145,6 +147,22 @@ static const char *const dpad_mode_text[] =3D { [DIR4] =3D "4-way", }; =20 +enum touchpad_mode_index { + TP_REL, + TP_ABS, +}; + +static const char *const touchpad_mode_text[] =3D { + [TP_REL] =3D "relative", + [TP_ABS] =3D "absolute", +}; + +enum touchpad_config_index { + CFG_WINDOWS_MODE =3D 0x03, + CFG_LINUX_MODE, + +}; + static int hid_gos_version_event(u8 *data) { struct version_report *ver_rep =3D (struct version_report *)data; @@ -204,6 +222,25 @@ static int hid_gos_gamepad_cfg_event(struct command_re= port *cmd_rep) return ret; } =20 +static int hid_gos_touchpad_event(struct command_report *cmd_rep) +{ + int ret =3D 0; + + switch (cmd_rep->sub_cmd) { + case CFG_LINUX_MODE: + drvdata.tp_linux_mode =3D cmd_rep->data[0]; + break; + case CFG_WINDOWS_MODE: + drvdata.tp_windows_mode =3D cmd_rep->data[0]; + break; + default: + ret =3D -EINVAL; + break; + } + + return ret; +} + static int hid_gos_set_event_return(struct command_report *cmd_rep) { if (cmd_rep->data[0] !=3D 0) @@ -251,7 +288,11 @@ static int hid_gos_raw_event(struct hid_device *hdev, = struct hid_report *report, case GET_GAMEPAD_CFG: ret =3D hid_gos_gamepad_cfg_event(cmd_rep); break; + case GET_TP_PARAM: + ret =3D hid_gos_touchpad_event(cmd_rep); + break; case SET_GAMEPAD_CFG: + case SET_TP_PARAM: ret =3D hid_gos_set_event_return(cmd_rep); break; default: @@ -530,6 +571,95 @@ static ssize_t gamepad_property_options(struct device = *dev, return count; } =20 +static ssize_t touchpad_property_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count, + enum touchpad_config_index index) +{ + size_t size =3D 1; + u8 val =3D 0; + int ret; + + switch (index) { + case CFG_WINDOWS_MODE: + ret =3D sysfs_match_string(touchpad_mode_text, buf); + if (ret < 0) + return ret; + val =3D ret; + break; + case CFG_LINUX_MODE: + ret =3D sysfs_match_string(touchpad_mode_text, buf); + if (ret < 0) + return ret; + val =3D ret; + break; + default: + return -EINVAL; + } + if (!val) + size =3D 0; + + ret =3D mcu_property_out(drvdata.hdev, SET_TP_PARAM, index, &val, size); + if (ret < 0) + return ret; + + return count; +} + +static ssize_t touchpad_property_show(struct device *dev, + struct device_attribute *attr, char *buf, + enum touchpad_config_index index) +{ + int ret =3D 0; + u8 i; + + ret =3D mcu_property_out(drvdata.hdev, GET_TP_PARAM, index, NULL, 0); + if (ret < 0) + return ret; + + switch (index) { + case CFG_WINDOWS_MODE: + i =3D drvdata.tp_windows_mode; + break; + case CFG_LINUX_MODE: + i =3D drvdata.tp_linux_mode; + break; + default: + return -EINVAL; + } + + if (i >=3D ARRAY_SIZE(touchpad_mode_text)) + return -EINVAL; + + return sysfs_emit(buf, "%s\n", touchpad_mode_text[i]); +} + +static ssize_t touchpad_property_options(struct device *dev, + struct device_attribute *attr, + char *buf, + enum touchpad_config_index index) +{ + size_t count =3D 0; + unsigned int i; + + switch (index) { + case CFG_WINDOWS_MODE: + case CFG_LINUX_MODE: + for (i =3D 0; i < ARRAY_SIZE(touchpad_mode_text); i++) { + count +=3D sysfs_emit_at(buf, count, "%s ", + touchpad_mode_text[i]); + } + break; + default: + return count; + } + + if (count) + buf[count - 1] =3D '\n'; + + return count; +} + static ssize_t mcu_id_show(struct device *dev, struct device_attribute *at= tr, char *buf) { @@ -659,9 +789,21 @@ static struct gos_cfg_attr touchpad_enabled =3D { FEAT= URE_TOUCHPAD_ENABLE }; LEGOS_DEVICE_ATTR_RW(touchpad_enabled, "enabled", index, gamepad); static DEVICE_ATTR_RO_NAMED(touchpad_enabled_index, "enabled_index"); =20 +static struct gos_cfg_attr touchpad_linux_mode =3D { CFG_LINUX_MODE }; +LEGOS_DEVICE_ATTR_RW(touchpad_linux_mode, "linux_mode", index, touchpad); +static DEVICE_ATTR_RO_NAMED(touchpad_linux_mode_index, "linux_mode_index"); + +static struct gos_cfg_attr touchpad_windows_mode =3D { CFG_WINDOWS_MODE }; +LEGOS_DEVICE_ATTR_RW(touchpad_windows_mode, "windows_mode", index, touchpa= d); +static DEVICE_ATTR_RO_NAMED(touchpad_windows_mode_index, "windows_mode_ind= ex"); + static struct attribute *legos_touchpad_attrs[] =3D { &dev_attr_touchpad_enabled.attr, &dev_attr_touchpad_enabled_index.attr, + &dev_attr_touchpad_linux_mode.attr, + &dev_attr_touchpad_linux_mode_index.attr, + &dev_attr_touchpad_windows_mode.attr, + &dev_attr_touchpad_windows_mode_index.attr, NULL, }; =20 --=20 2.53.0