LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Prashant Malani <pmalani@chromium.org>
To: enric.balletbo@collabora.com, groeck@chromium.org,
	bleung@chromium.org, lee.jones@linaro.org, sre@kernel.org
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
	Prashant Malani <pmalani@chromium.org>
Subject: [PATCH v7 2/3] mfd: cros_ec: Add cros-usbpd-notify subdevice
Date: Thu, 16 Jan 2020 16:28:22 -0800	[thread overview]
Message-ID: <20200117002820.56872-2-pmalani@chromium.org> (raw)
In-Reply-To: <20200117002820.56872-1-pmalani@chromium.org>

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(+)

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.
-- 
2.25.0.341.g760bfbb309-goog


  reply	other threads:[~2020-01-17  0:31 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-17  0:28 [PATCH v7 1/3] platform: chrome: Add cros-usbpd-notify driver Prashant Malani
2020-01-17  0:28 ` Prashant Malani [this message]
2020-01-17 11:35   ` [PATCH v7 2/3] mfd: cros_ec: Add cros-usbpd-notify subdevice Lee Jones
2020-01-17  0:28 ` [PATCH v7 3/3] power: supply: cros-ec-usbpd-charger: Fix host events Prashant Malani
2020-01-17  1:12   ` Sebastian Reichel
2020-01-17 16:36     ` Enric Balletbo i Serra
2020-01-21 12:10 ` [PATCH v7 1/3] platform: chrome: Add cros-usbpd-notify driver Enric Balletbo i Serra
2020-01-21 21:17   ` Prashant Malani
2020-01-24 19:35     ` Enric Balletbo i Serra
2020-01-24 21:52       ` Prashant Malani

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200117002820.56872-2-pmalani@chromium.org \
    --to=pmalani@chromium.org \
    --cc=bleung@chromium.org \
    --cc=enric.balletbo@collabora.com \
    --cc=groeck@chromium.org \
    --cc=lee.jones@linaro.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-pm@vger.kernel.org \
    --cc=sre@kernel.org \
    --subject='Re: [PATCH v7 2/3] mfd: cros_ec: Add cros-usbpd-notify subdevice' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).