| Message ID | 20200117002820.56872-2-pmalani@chromium.org (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | [v7,1/3] platform: chrome: Add cros-usbpd-notify driver | expand |
On Thu, 16 Jan 2020, Prashant Malani wrote: > 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. > > Reviewed-by: Benson Leung <bleung@chromium.org> > Signed-off-by: Prashant Malani <pmalani@chromium.org> > --- > > Changes in v7: > - No changes. > > Changes in v6: > - No changes. > > Changes in v5: > - Updated the IS_ENABLED() check to check for CONFIG_OF instead of > !CONFIG_ACPI according to upstream comments. > > Changes in v4: > - Removed #ifndef usage; instead, moved cros-usbpd-notify to a separate > mfd_cell and used an IS_ENABLED() check. > - Changed commit title and description slightly to reflect change in > code. > > drivers/mfd/cros_ec_dev.c | 22 ++++++++++++++++++++++ > 1 file changed, 22 insertions(+) Applied v6, since Patchwork can pick-up the Acks and there haven't been any changes since then.
diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c index c4b977a5dd966..d0c28a4c10ad0 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, @@ -202,6 +207,23 @@ 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.