linux-kernel - [PATCH v4 12/12] mfd: cros_ec: Add throttler sub-device

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Message-Id: <20180621015237.100100-13-mka@chromium.org>
Date:   Wed, 20 Jun 2018 18:52:37 -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>,
        Benson Leung <bleung@...omium.org>,
        Olof Johansson <olof@...om.net>,
        Matthias Kaehlcke <mka@...omium.org>
Subject: [PATCH v4 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 v4:
- register throttler in cros_ec_dev.c instead of cros_ec.c

Changes in v3:
- patch added to series
---
 drivers/mfd/cros_ec_dev.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
index eafd06f62a3a..9e56c2793075 100644
--- a/drivers/mfd/cros_ec_dev.c
+++ b/drivers/mfd/cros_ec_dev.c
@@ -383,6 +383,22 @@ static void cros_ec_sensors_register(struct cros_ec_dev *ec)
 	kfree(msg);
 }
 
+static const struct mfd_cell ec_throttler_cells[] = {
+	{ .name = "cros-ec-throttler" }
+};
+
+static void cros_ec_throttler_register(struct cros_ec_dev *ec)
+{
+	int ret;
+
+	ret = mfd_add_devices(ec->dev, 0, ec_throttler_cells,
+			      ARRAY_SIZE(ec_throttler_cells),
+			      NULL, 0, NULL);
+	if (ret)
+		dev_err(ec->dev,
+			"failed to add cros-ec-throttler device: %d\n", ret);
+}
+
 static int ec_device_probe(struct platform_device *pdev)
 {
 	int retval = -ENOMEM;
@@ -422,6 +438,9 @@ static int ec_device_probe(struct platform_device *pdev)
 	if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE))
 		cros_ec_sensors_register(ec);
 
+	if (IS_ENABLED(CONFIG_CROS_EC_THROTTLER))
+		cros_ec_throttler_register(ec);
+
 	/* Take control of the lightbar from the EC. */
 	lb_manual_suspend_ctrl(ec, 1);
 
-- 
2.18.0.rc2.346.g013aa6912e-goog