Commit 4602dce0 authored by Prashant Malani's avatar Prashant Malani Committed by Lee Jones
Browse files

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: default avatarPrashant Malani <pmalani@chromium.org>
Reviewed-by: default avatarBenson Leung <bleung@chromium.org>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent 1112ba02

drivers/mfd/cros_ec_dev.c

+22 −0
Original line number Diff line number Diff line
@@ -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.