linux-kernel - [PATCH v2 4/8] mfd: cros_ec_dev: Register cros-ec-rtc driver as a subdevice.

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Message-Id: <20180223150605.10417-5-enric.balletbo@collabora.com>
Date:   Fri, 23 Feb 2018 16:06:01 +0100
From:   Enric Balletbo i Serra <enric.balletbo@...labora.com>
To:     lee.jones@...aro.org
Cc:     groeck@...omium.org, gwendal@...omium.org, kernel@...labora.com,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 4/8] mfd: cros_ec_dev: Register cros-ec-rtc driver as a subdevice.

Check whether this EC instance has RTC host command support and instatiate
the RTC driver as a subdevice in such case.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
Reviewed-by: Gwendal Grignou <gwendal@...omium.org>
---

Changes in v2:
- [4/8] Add the Reviewed-by Gwendal.

 drivers/mfd/cros_ec_dev.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
index f98e5beffca6..33fe1b439ee2 100644
--- a/drivers/mfd/cros_ec_dev.c
+++ b/drivers/mfd/cros_ec_dev.c
@@ -389,6 +389,10 @@ static void cros_ec_sensors_register(struct cros_ec_dev *ec)
 	kfree(msg);
 }
 
+static const struct mfd_cell cros_ec_rtc_cell = {
+	.name = "cros-ec-rtc",
+};
+
 static int ec_device_probe(struct platform_device *pdev)
 {
 	int retval = -ENOMEM;
@@ -437,6 +441,16 @@ static int ec_device_probe(struct platform_device *pdev)
 	if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE))
 		cros_ec_sensors_register(ec);
 
+	/* check whether this EC instance has RTC host command support */
+	if (cros_ec_check_features(ec, EC_FEATURE_RTC)) {
+		retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
+					 &cros_ec_rtc_cell, 1, NULL, 0, NULL);
+		if (retval)
+			dev_err(ec->dev,
+				"failed to add cros-ec-rtc device: %d\n",
+				retval);
+	}
+
 	/* Take control of the lightbar from the EC. */
 	lb_manual_suspend_ctrl(ec, 1);
 
-- 
2.16.1