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GET /api/patches/2219113/?format=api
{ "id": 2219113, "url": "http://patchwork.ozlabs.org/api/patches/2219113/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-gpio/patch/20260402-baytrail-real-swnode-v2-4-6f5054a4cc07@oss.qualcomm.com/", "project": { "id": 42, "url": "http://patchwork.ozlabs.org/api/projects/42/?format=api", "name": "Linux GPIO development", "link_name": "linux-gpio", "list_id": "linux-gpio.vger.kernel.org", "list_email": "linux-gpio@vger.kernel.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260402-baytrail-real-swnode-v2-4-6f5054a4cc07@oss.qualcomm.com>", "list_archive_url": null, "date": "2026-04-02T12:54:29", "name": "[v2,4/4] platform/x86: x86-android-tablets: enable fwnode matching of GPIO chips", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "5b06153a17ae8cc62bb82b9fea3859532edbb379", "submitter": { "id": 92196, "url": "http://patchwork.ozlabs.org/api/people/92196/?format=api", "name": "Bartosz Golaszewski", "email": "bartosz.golaszewski@oss.qualcomm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-gpio/patch/20260402-baytrail-real-swnode-v2-4-6f5054a4cc07@oss.qualcomm.com/mbox/", "series": [ { "id": 498478, "url": "http://patchwork.ozlabs.org/api/series/498478/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-gpio/list/?series=498478", "date": "2026-04-02T12:54:25", "name": "platform/x86: x86-android-tablets: use real firmware node references with intel drivers", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/498478/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2219113/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2219113/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-gpio+bounces-34589-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-gpio@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256\n header.s=qcppdkim1 header.b=Gjy5tC9H;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.a=rsa-sha256 header.s=google header.b=ZRbqAa7l;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=104.64.211.4; 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charset=\"utf-8\"", "Content-Transfer-Encoding": "7bit", "Message-Id": "<20260402-baytrail-real-swnode-v2-4-6f5054a4cc07@oss.qualcomm.com>", "References": "<20260402-baytrail-real-swnode-v2-0-6f5054a4cc07@oss.qualcomm.com>", "In-Reply-To": "\n <20260402-baytrail-real-swnode-v2-0-6f5054a4cc07@oss.qualcomm.com>", "To": "Andy Shevchenko <andriy.shevchenko@linux.intel.com>,\n Daniel Scally <djrscally@gmail.com>,\n Heikki Krogerus <heikki.krogerus@linux.intel.com>,\n Sakari Ailus <sakari.ailus@linux.intel.com>,\n Greg Kroah-Hartman <gregkh@linuxfoundation.org>,\n \"Rafael J. Wysocki\" <rafael@kernel.org>, Danilo Krummrich <dakr@kernel.org>,\n Mika Westerberg <mika.westerberg@linux.intel.com>,\n Andy Shevchenko <andy@kernel.org>, Linus Walleij <linusw@kernel.org>,\n Hans de Goede <hansg@kernel.org>,\n =?utf-8?q?Ilpo_J=C3=A4rvinen?= <ilpo.jarvinen@linux.intel.com>,\n Dmitry Torokhov <dmitry.torokhov@gmail.com>, Len Brown <lenb@kernel.org>", "Cc": "linux-acpi@vger.kernel.org, driver-core@lists.linux.dev,\n linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org,\n platform-driver-x86@vger.kernel.org, brgl@kernel.org,\n Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>", "X-Mailer": "b4 0.14.2", "X-Developer-Signature": "v=1; a=openpgp-sha256; l=5641;\n i=bartosz.golaszewski@oss.qualcomm.com; h=from:subject:message-id;\n bh=l4lnny3dGBJZoHOBatk5qgjCf18AZd9xMDIK67fuBWk=;\n b=owEBbQKS/ZANAwAKAQWdLsv/NoTDAcsmYgBpzmcSDJFevJiDAeVlynB8mr3GoSDutTpLPSkiz\n e/4bjE89PSJAjMEAAEKAB0WIQSR5RMt5bVGHXuiZfwFnS7L/zaEwwUCac5nEgAKCRAFnS7L/zaE\n w1vnD/9rZfMZ2QuxGkRgddz00Bqvn0zAJcdUasDuGcCPuP4CeV/PY+00l1VWHuhkhdujGGkeX7/\n +9v1S5Htf3bM+YuVWITrs0Gv6er0+m6fv4RwUkPUz1NWTyrh1TChJ+abvmEfhp0cTeOBbcpIrBY\n gI8DJ8d+MGIl0aRWaj2kJm5alDN8NS0IbtXLabnZh52KHuqB0mQLstLgHsw13mnDtQdXoZRcMH2\n lnWGI2vnj/IN3HNTJszaoznfzEkzk8e9bVTejROmslYLUUSUgm2HNhJ33OaGRiDiSMJEQd36qHv\n rG8suBE6nX/CQWMitTpEP7X2sR/COz+9iZwg+yT1Trq4+t2TfsBTUTSkMUiF39UcVQPIgaSQCV+\n 2rSOasJKGEx7NbUi6f9XoD/Ut/beI549qYEWrxi1+UHLbsgnqqUS8J15f9NC2U05ynruz0xtTPo\n kQRhdnqesm4ftCZcFzn8666KmOaI22QQ5S1hgRyoG3vcd6qTR4ryjO78K5ysvOzlJNt+FTfWatS\n XenNDc846EDPJPHgFgiAC9Tv5ctleTUIHarEgimgatG6M88BX1qRv5YdiIAl5FTvrunIo9ST2wD\n 8jjbTxwHNqdYVzz2OUecmpL2OPeE4gXggVc4R3uosGasezJtGDFh6jjnuFGPifvcYwAA/G6R0nT\n 4acWO63D4oXa/Gg==", "X-Developer-Key": "i=bartosz.golaszewski@oss.qualcomm.com; a=openpgp;\n fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772", "X-Proofpoint-ORIG-GUID": "ciWiBwd2Fyw9AxgPR3cjWO1LawtL1aXs", "X-Proofpoint-GUID": "ciWiBwd2Fyw9AxgPR3cjWO1LawtL1aXs", "X-Authority-Analysis": "v=2.4 cv=RoLI7SmK c=1 sm=1 tr=0 ts=69ce671f cx=c_pps\n a=WeENfcodrlLV9YRTxbY/uA==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10\n a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22\n a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=EUspDBNiAAAA:8\n a=6VCG6zWJw881NgsJBYMA:9 a=QEXdDO2ut3YA:10 a=kacYvNCVWA4VmyqE58fU:22", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDAyMDExNSBTYWx0ZWRfXzl+5rXoigRM6\n WSBj0eMEW9glxEJvOw5+ul65HKnfxwc9OUQZ8gb/q/KybVrJAeZVEMHhc4H5YCbdXLxsLIX6oT5\n I5UAu4UsC8Bg6IXgZYrysSk6C3VsZe9FMmKhVpMyy5qp/24TYarwf9dGLzNZjeS6G1YT3Vy20UX\n uPzYRpGVfWjj011xdpj22jpSwFyI86eKo3JTif5O4uAEo3l8Rk1y3GrMFHulNjQYg3JFiE58FaN\n 7Wc0I+txjOJsnFH0oNZvmxTsWm9htHe7wSMSBqLkuHUenQdMKD9b58SfH6kXllZu7+k8lH/GkSZ\n hYdFyVXiy6L+zy/W/EcGIhaZtaePU+ecWng9kO58bZcp+lKRyc8udf1yA7bbk/UVYvsdLKyZH+j\n LxziAEETYmT5FRrFhlYoTSRCROrdEfTRi7TbnFdYDSW3ZX6viJt6FbX64sMGfc6plEWCA3S9Q0v\n kuFjU75GPmCX8aB3WMw==", "X-Proofpoint-Virus-Version": "vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-04-02_01,2026-04-02_02,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n malwarescore=0 adultscore=0 clxscore=1015 priorityscore=1501\n lowpriorityscore=0 impostorscore=0 suspectscore=0 phishscore=0 bulkscore=0\n spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound\n adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001\n definitions=main-2604020115" }, "content": "In order to allow GPIOLIB to match cherryview and baytrail GPIO\ncontrollers by their firmware nodes instead of their names, we need to\nattach the - currently \"dangling\" - existing software nodes to their\ntarget devices dynamically.\n\nWe deal with devices described in ACPI so set up a bus notifier waiting\nfor the ADD events. We know the name of the device we're waiting for so\nmatch against it and - on match - assign the appropriate software node\nas the secondary firmware node of the underlying ACPI node. In case the\nevent was emitted earlier than this driver's probe: also make sure the\ndevice was not added before.\n\nScheduling fine-grained devres actions allows for proper teardown and\nunsetting of the secondary firmware nodes.\n\nSigned-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>\n---\n drivers/platform/x86/x86-android-tablets/core.c | 127 +++++++++++++++++++++++-\n 1 file changed, 124 insertions(+), 3 deletions(-)", "diff": "diff --git a/drivers/platform/x86/x86-android-tablets/core.c b/drivers/platform/x86/x86-android-tablets/core.c\nindex 021009e9085bec3db9c4daa1f6235600210a6099..9e6e8f272dfe16cda421b569802045c3d94fc0ab 100644\n--- a/drivers/platform/x86/x86-android-tablets/core.c\n+++ b/drivers/platform/x86/x86-android-tablets/core.c\n@@ -13,10 +13,12 @@\n #include <linux/acpi.h>\n #include <linux/device.h>\n #include <linux/dmi.h>\n+#include <linux/fwnode.h>\n #include <linux/gpio/consumer.h>\n #include <linux/gpio/machine.h>\n #include <linux/irq.h>\n #include <linux/module.h>\n+#include <linux/notifier.h>\n #include <linux/pci.h>\n #include <linux/platform_device.h>\n #include <linux/serdev.h>\n@@ -360,6 +362,124 @@ static const struct software_node *cherryview_gpiochip_node_group[] = {\n \tNULL\n };\n \n+struct auto_secondary_data {\n+\tstruct notifier_block nb;\n+\tstruct device *parent;\n+};\n+\n+static void auto_secondary_unset(void *data)\n+{\n+\tstruct fwnode_handle *fwnode = data;\n+\n+\tfwnode->secondary = NULL;\n+}\n+\n+static int acpi_set_secondary_fwnode(struct device *parent, struct device *dev,\n+\t\t\t\t const struct software_node *const swnode)\n+{\n+\tstruct acpi_device *device = to_acpi_device(dev);\n+\tstruct fwnode_handle *fwnode;\n+\tint ret;\n+\n+\tfwnode = software_node_fwnode(swnode);\n+\tif (WARN_ON(!fwnode))\n+\t\treturn -ENOENT;\n+\n+\tfwnode->secondary = ERR_PTR(-ENODEV);\n+\tdevice->fwnode.secondary = fwnode;\n+\n+\tret = devm_add_action_or_reset(parent, auto_secondary_unset, &device->fwnode);\n+\tif (ret)\n+\t\tdev_err(parent, \"Failed to schedule the unset action for secondary fwnode\\n\");\n+\n+\treturn ret;\n+}\n+\n+static int acpi_auto_secondary_notifier(struct notifier_block *nb,\n+\t\t\t\t\tunsigned long action, void *data)\n+{\n+\tstruct auto_secondary_data *auto_sec = container_of(nb, struct auto_secondary_data, nb);\n+\tconst struct software_node *const *swnode;\n+\tstruct device *dev = data;\n+\tint ret;\n+\n+\tswitch (action) {\n+\tcase BUS_NOTIFY_ADD_DEVICE:\n+\t\tfor (swnode = gpiochip_node_group; *swnode; swnode++) {\n+\t\t\tif (strcmp((*swnode)->name, dev_name(dev)) == 0) {\n+\t\t\t\tret = acpi_set_secondary_fwnode(auto_sec->parent, dev, *swnode);\n+\t\t\t\treturn ret ? NOTIFY_BAD : NOTIFY_OK;\n+\t\t\t}\n+\t\t}\n+\t\tbreak;\n+\tdefault:\n+\t\tbreak;\n+\t}\n+\n+\treturn NOTIFY_DONE;\n+}\n+\n+static void auto_secondary_unregister_node_group(void *data)\n+{\n+\tconst struct software_node **nodes = data;\n+\n+\tsoftware_node_unregister_node_group(nodes);\n+}\n+\n+static void auto_secondary_unregister_notifier(void *data)\n+{\n+\tstruct notifier_block *nb = data;\n+\n+\tbus_unregister_notifier(&acpi_bus_type, nb);\n+}\n+\n+static int auto_secondary_fwnode_init(struct device *parent)\n+{\n+\tconst struct software_node *const *swnode;\n+\tstruct auto_secondary_data *data;\n+\tint ret;\n+\n+\tret = software_node_register_node_group(gpiochip_node_group);\n+\tif (ret)\n+\t\treturn ret;\n+\n+\tret = devm_add_action_or_reset(parent,\n+\t\t\t\t auto_secondary_unregister_node_group,\n+\t\t\t\t gpiochip_node_group);\n+\tif (ret)\n+\t\treturn ret;\n+\n+\tdata = devm_kzalloc(parent, sizeof(*data), GFP_KERNEL);\n+\tif (!data)\n+\t\treturn -ENOMEM;\n+\n+\tdata->nb.notifier_call = acpi_auto_secondary_notifier;\n+\tdata->parent = parent;\n+\n+\tret = bus_register_notifier(&acpi_bus_type, &data->nb);\n+\tif (ret)\n+\t\treturn ret;\n+\n+\tret = devm_add_action_or_reset(parent,\n+\t\t\t\t auto_secondary_unregister_notifier,\n+\t\t\t\t &data->nb);\n+\tif (ret)\n+\t\treturn ret;\n+\n+\t/* Device may have been already added. */\n+\tfor (swnode = gpiochip_node_group; *swnode; swnode++) {\n+\t\tstruct device *dev __free(put_device) =\n+\t\t\tbus_find_device_by_name(&acpi_bus_type, NULL, (*swnode)->name);\n+\t\tif (dev) {\n+\t\t\tret = acpi_set_secondary_fwnode(parent, dev, *swnode);\n+\t\t\tif (ret)\n+\t\t\t\treturn ret;\n+\t\t}\n+\t}\n+\n+\treturn 0;\n+}\n+\n static void x86_android_tablet_remove(struct platform_device *pdev)\n {\n \tint i;\n@@ -391,7 +511,6 @@ static void x86_android_tablet_remove(struct platform_device *pdev)\n \n \tsoftware_node_unregister_node_group(gpio_button_swnodes);\n \tsoftware_node_unregister_node_group(swnode_group);\n-\tsoftware_node_unregister_node_group(gpiochip_node_group);\n }\n \n static __init int x86_android_tablet_probe(struct platform_device *pdev)\n@@ -427,9 +546,11 @@ static __init int x86_android_tablet_probe(struct platform_device *pdev)\n \t\tbreak;\n \t}\n \n-\tret = software_node_register_node_group(gpiochip_node_group);\n-\tif (ret)\n+\tret = auto_secondary_fwnode_init(&pdev->dev);\n+\tif (ret) {\n+\t\tx86_android_tablet_remove(pdev);\n \t\treturn ret;\n+\t}\n \n \tret = software_node_register_node_group(dev_info->swnode_group);\n \tif (ret) {\n", "prefixes": [ "v2", "4/4" ] }