diff options
| author | Jameson Thies <jthies@google.com> | 2026-04-03 22:33:27 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-04-07 13:49:53 +0200 |
| commit | 40b17a345d3fe88b98acfe2637452baa32785ee0 (patch) | |
| tree | f16550b2ca56d7672955485d2fd90717b8fa4ba7 /drivers/usb | |
| parent | 250892b5d64d6a54faf4a0829ff3a99af27a4bc1 (diff) | |
| download | lwn-40b17a345d3fe88b98acfe2637452baa32785ee0.tar.gz lwn-40b17a345d3fe88b98acfe2637452baa32785ee0.zip | |
usb: typec: cros_ec_ucsi: Load driver from OF and ACPI definitions
Add support for cros_ec_ucsi to load based on "google,cros-ec-ucsi"
compatible devices and "GOOG0021" ACPI nodes.
Signed-off-by: Jameson Thies <jthies@google.com>
Reviewed-by: Benson Leung <bleung@chromium.org>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Link: https://patch.msgid.link/20260403223357.1896403-3-jthies@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/typec/ucsi/cros_ec_ucsi.c | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/drivers/usb/typec/ucsi/cros_ec_ucsi.c b/drivers/usb/typec/ucsi/cros_ec_ucsi.c index 6bca2dce211c..251aa7251ce6 100644 --- a/drivers/usb/typec/ucsi/cros_ec_ucsi.c +++ b/drivers/usb/typec/ucsi/cros_ec_ucsi.c @@ -5,11 +5,13 @@ * Copyright 2024 Google LLC. */ +#include <linux/acpi.h> #include <linux/container_of.h> #include <linux/dev_printk.h> #include <linux/jiffies.h> #include <linux/mod_devicetable.h> #include <linux/module.h> +#include <linux/of.h> #include <linux/platform_data/cros_ec_commands.h> #include <linux/platform_data/cros_usbpd_notify.h> #include <linux/platform_data/cros_ec_proto.h> @@ -257,7 +259,6 @@ static void cros_ucsi_destroy(struct cros_ucsi_data *udata) static int cros_ucsi_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - struct cros_ec_dev *ec_data = dev_get_drvdata(dev->parent); struct cros_ucsi_data *udata; int ret; @@ -265,9 +266,16 @@ static int cros_ucsi_probe(struct platform_device *pdev) if (!udata) return -ENOMEM; + /* ACPI and OF FW nodes for cros_ec_ucsi are children of the ChromeOS EC. If the + * cros_ec_ucsi device has an ACPI or OF FW node, its parent is the ChromeOS EC device. + * Platforms without a FW node for cros_ec_ucsi may add it as a subdevice of cros_ec_dev. + */ udata->dev = dev; + if (is_acpi_device_node(dev->fwnode) || is_of_node(dev->fwnode)) + udata->ec = dev_get_drvdata(dev->parent); + else + udata->ec = ((struct cros_ec_dev *)dev_get_drvdata(dev->parent))->ec_dev; - udata->ec = ec_data->ec_dev; if (!udata->ec) return dev_err_probe(dev, -ENODEV, "couldn't find parent EC device\n"); @@ -348,10 +356,24 @@ static const struct platform_device_id cros_ucsi_id[] = { }; MODULE_DEVICE_TABLE(platform, cros_ucsi_id); +static const struct acpi_device_id cros_ec_ucsi_acpi_device_ids[] = { + { "GOOG0021", 0 }, + { } +}; +MODULE_DEVICE_TABLE(acpi, cros_ec_ucsi_acpi_device_ids); + +static const struct of_device_id cros_ucsi_of_match[] = { + { .compatible = "google,cros-ec-ucsi", }, + {} +}; +MODULE_DEVICE_TABLE(of, cros_ucsi_of_match); + static struct platform_driver cros_ucsi_driver = { .driver = { .name = KBUILD_MODNAME, .pm = &cros_ucsi_pm_ops, + .acpi_match_table = cros_ec_ucsi_acpi_device_ids, + .of_match_table = cros_ucsi_of_match, }, .id_table = cros_ucsi_id, .probe = cros_ucsi_probe, |