linux-kernel - [PATCH 7/7] mfd: cros_ec: add RTC as mfd subdevice

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20170324174407.25401-8-enric.balletbo@collabora.com>
Date:   Fri, 24 Mar 2017 18:44:07 +0100
From:   Enric Balletbo i Serra <enric.balletbo@...labora.com>
To:     Jonathan Cameron <jic23@...nel.org>,
        Lee Jones <lee.jones@...aro.org>,
        Olof Johansson <olof@...om.net>, bleung@...omium.org
Cc:     martinez.javier@...il.com, Guenter Roeck <groeck@...omium.org>,
        Gwendal Grignou <gwendal@...omium.org>,
        linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
        rtc-linux@...glegroups.com, Stephen Barber <smbarber@...omium.org>
Subject: [PATCH 7/7] mfd: cros_ec: add RTC as mfd subdevice

From: Stephen Barber <smbarber@...omium.org>

If the EC supports RTC host commands, expose an RTC device.

Signed-off-by: Stephen Barber <smbarber@...omium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
---
 drivers/mfd/cros_ec.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
index bbc17ab..1ff88b1 100644
--- a/drivers/mfd/cros_ec.c
+++ b/drivers/mfd/cros_ec.c
@@ -51,6 +51,11 @@ static const struct mfd_cell ec_pd_cell = {
 	.pdata_size = sizeof(pd_p),
 };
 
+static const struct mfd_cell ec_rtc_cell = {
+	.name = "cros-ec-rtc",
+	.id   = -1,
+};
+
 static irqreturn_t ec_irq_thread(int irq, void *data)
 {
 	struct cros_ec_device *ec_dev = data;
@@ -238,6 +243,15 @@ static void cros_ec_sensors_register(struct cros_ec_device *ec_dev)
 	kfree(msg);
 }
 
+static void cros_ec_rtc_register(struct cros_ec_device *ec_dev)
+{
+	int ret;
+
+	ret = mfd_add_devices(ec_dev->dev, 0, &ec_rtc_cell, 1, NULL, 0, NULL);
+	if (ret)
+		dev_err(ec_dev->dev, "failed to add EC RTC\n");
+}
+
 int cros_ec_register(struct cros_ec_device *ec_dev)
 {
 	struct device *dev = ec_dev->dev;
@@ -287,6 +301,10 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
 	if (cros_ec_check_features(ec_dev, EC_FEATURE_MOTION_SENSE))
 		cros_ec_sensors_register(ec_dev);
 
+	/* Check whether this EC has RTC support */
+	if (cros_ec_check_features(ec_dev, EC_FEATURE_RTC))
+		cros_ec_rtc_register(ec_dev);
+
 	if (ec_dev->max_passthru) {
 		/*
 		 * Register a PD device as well on top of this device.
-- 
2.9.3