diff options
Diffstat (limited to 'drivers/platform/chrome/cros_usbpd_notify.c')
| -rw-r--r-- | drivers/platform/chrome/cros_usbpd_notify.c | 34 |
1 files changed, 25 insertions, 9 deletions
diff --git a/drivers/platform/chrome/cros_usbpd_notify.c b/drivers/platform/chrome/cros_usbpd_notify.c index 10670b6588e3..c90174360004 100644 --- a/drivers/platform/chrome/cros_usbpd_notify.c +++ b/drivers/platform/chrome/cros_usbpd_notify.c @@ -6,6 +6,8 @@ */ #include <linux/acpi.h> +#include <linux/fwnode.h> +#include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/platform_data/cros_ec_proto.h> #include <linux/platform_data/cros_usbpd_notify.h> @@ -14,6 +16,7 @@ #define DRV_NAME "cros-usbpd-notify" #define DRV_NAME_PLAT_ACPI "cros-usbpd-notify-acpi" #define ACPI_DRV_NAME "GOOG0003" +#define CREC_DRV_NAME "GOOG0004" static BLOCKING_NOTIFIER_HEAD(cros_usbpd_notifier_list); @@ -97,8 +100,9 @@ static int cros_usbpd_notify_probe_acpi(struct platform_device *pdev) { struct cros_usbpd_notify_data *pdnotify; struct device *dev = &pdev->dev; - struct acpi_device *adev; + struct acpi_device *adev, *parent_adev; struct cros_ec_device *ec_dev; + struct fwnode_handle *parent_fwnode; acpi_status status; adev = ACPI_COMPANION(dev); @@ -113,8 +117,18 @@ static int cros_usbpd_notify_probe_acpi(struct platform_device *pdev) /* * We continue even for older devices which don't have the * correct device heirarchy, namely, GOOG0003 is a child - * of GOOG0004. + * of GOOG0004. If GOOG0003 is a child of GOOG0004 and we + * can't get a pointer to the Chrome EC device, defer the + * probe function. */ + parent_fwnode = fwnode_get_parent(dev->fwnode); + if (parent_fwnode) { + parent_adev = to_acpi_device_node(parent_fwnode); + if (parent_adev && + acpi_dev_hid_match(parent_adev, CREC_DRV_NAME)) { + return -EPROBE_DEFER; + } + } dev_warn(dev, "Couldn't get Chrome EC device pointer.\n"); } @@ -134,15 +148,13 @@ static int cros_usbpd_notify_probe_acpi(struct platform_device *pdev) return 0; } -static int cros_usbpd_notify_remove_acpi(struct platform_device *pdev) +static void cros_usbpd_notify_remove_acpi(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct acpi_device *adev = ACPI_COMPANION(dev); acpi_remove_notify_handler(adev->handle, ACPI_ALL_NOTIFY, cros_usbpd_notify_acpi); - - return 0; } static const struct acpi_device_id cros_usbpd_notify_acpi_device_ids[] = { @@ -209,7 +221,7 @@ static int cros_usbpd_notify_probe_plat(struct platform_device *pdev) return 0; } -static int cros_usbpd_notify_remove_plat(struct platform_device *pdev) +static void cros_usbpd_notify_remove_plat(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct cros_ec_dev *ecdev = dev_get_drvdata(dev->parent); @@ -218,16 +230,21 @@ static int cros_usbpd_notify_remove_plat(struct platform_device *pdev) blocking_notifier_chain_unregister(&ecdev->ec_dev->event_notifier, &pdnotify->nb); - - return 0; } +static const struct platform_device_id cros_usbpd_notify_id[] = { + { DRV_NAME, 0 }, + {} +}; +MODULE_DEVICE_TABLE(platform, cros_usbpd_notify_id); + static struct platform_driver cros_usbpd_notify_plat_driver = { .driver = { .name = DRV_NAME, }, .probe = cros_usbpd_notify_probe_plat, .remove = cros_usbpd_notify_remove_plat, + .id_table = cros_usbpd_notify_id, }; static int __init cros_usbpd_notify_init(void) @@ -262,4 +279,3 @@ module_exit(cros_usbpd_notify_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("ChromeOS power delivery notifier device"); MODULE_AUTHOR("Jon Flatley <jflat@chromium.org>"); -MODULE_ALIAS("platform:" DRV_NAME); |