diff options
| author | Prashant Malani <pmalani@chromium.org> | 2020-01-14 15:22:20 -0800 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2020-01-24 07:33:59 +0000 |
| commit | 4602dce0361ebc67b9bfbed9338eee588e3c7e7e (patch) | |
| tree | fd3a55063661280e25842d77477478abf45c9619 /drivers/mfd | |
| parent | 1112ba02ff1190ca9c15a912f9269e54b46d2d82 (diff) | |
| download | linux-4602dce0361ebc67b9bfbed9338eee588e3c7e7e.tar.bz2 | |
mfd: cros_ec: Add cros-usbpd-notify subdevice
Add the cros-usbpd-notify driver as a subdevice on platforms that
support the EC_FEATURE_USB_PD EC feature flag and don't have the
ACPI PD notification device defined.
This driver allows other cros-ec devices to receive PD event
notifications from the Chrome OS Embedded Controller (EC) via a
notification chain.
Signed-off-by: Prashant Malani <pmalani@chromium.org>
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/cros_ec_dev.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c index c4b977a5dd96..d0c28a4c10ad 100644 --- a/drivers/mfd/cros_ec_dev.c +++ b/drivers/mfd/cros_ec_dev.c @@ -5,6 +5,7 @@ * Copyright (C) 2014 Google, Inc. */ +#include <linux/kconfig.h> #include <linux/mfd/core.h> #include <linux/mfd/cros_ec.h> #include <linux/module.h> @@ -87,6 +88,10 @@ static const struct mfd_cell cros_usbpd_charger_cells[] = { { .name = "cros-usbpd-logger", }, }; +static const struct mfd_cell cros_usbpd_notify_cells[] = { + { .name = "cros-usbpd-notify", }, +}; + static const struct cros_feature_to_cells cros_subdevices[] = { { .id = EC_FEATURE_CEC, @@ -203,6 +208,23 @@ static int ec_device_probe(struct platform_device *pdev) } /* + * The PD notifier driver cell is separate since it only needs to be + * explicitly added on platforms that don't have the PD notifier ACPI + * device entry defined. + */ + if (IS_ENABLED(CONFIG_OF)) { + if (cros_ec_check_features(ec, EC_FEATURE_USB_PD)) { + retval = mfd_add_hotplug_devices(ec->dev, + cros_usbpd_notify_cells, + ARRAY_SIZE(cros_usbpd_notify_cells)); + if (retval) + dev_err(ec->dev, + "failed to add PD notify devices: %d\n", + retval); + } + } + + /* * The following subdevices cannot be detected by sending the * EC_FEATURE_GET_CMD to the Embedded Controller device. */ |