linux-kernel - [PATCH v3 12/12] mfd: cros_ec: Add throttler sub-device

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Message-Id: <20180614194712.102134-13-mka@chromium.org>
Date:   Thu, 14 Jun 2018 12:47:12 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     MyungJoo Ham <myungjoo.ham@...sung.com>
Cc:     Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Brian Norris <briannorris@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Lee Jones <lee.jones@...aro.org>,
        Matthias Kaehlcke <mka@...omium.org>
Subject: [PATCH v3 12/12] mfd: cros_ec: Add throttler sub-device

Instantiate the CrOS EC throttler if it is enabled in the kernel
configuration.

Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
---
Changes in v3:
- patch added to series

 drivers/mfd/cros_ec.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
index 36156a41499c..5f52b6e2c21a 100644
--- a/drivers/mfd/cros_ec.c
+++ b/drivers/mfd/cros_ec.c
@@ -91,6 +91,10 @@ static int cros_ec_sleep_event(struct cros_ec_device *ec_dev, u8 sleep_event)
 	return cros_ec_cmd_xfer(ec_dev, &buf.msg);
 }
 
+static const struct mfd_cell ec_throttler_cell = {
+	.name = "cros-ec-throttler",
+};
+
 int cros_ec_register(struct cros_ec_device *ec_dev)
 {
 	struct device *dev = ec_dev->dev;
@@ -153,6 +157,18 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
 		}
 	}
 
+	if (IS_ENABLED(CONFIG_CROS_EC_THROTTLER)) {
+		err = mfd_add_devices(ec_dev->dev, PLATFORM_DEVID_AUTO,
+				      &ec_throttler_cell, 1, NULL, ec_dev->irq,
+				      NULL);
+		if (err) {
+			dev_err(dev,
+				"Failed to register throttler subdevice %d\n",
+				err);
+			return err;
+		}
+	}
+
 	if (IS_ENABLED(CONFIG_OF) && dev->of_node) {
 		err = devm_of_platform_populate(dev);
 		if (err) {
-- 
2.18.0.rc1.242.g61856ae69a-goog