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

Enric Balletbo i Serra
2017-03-24T17:45:43Z

From: Stephen Barber <smbarber@chromium.org>

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

Signed-off-by: Stephen Barber <smbarber@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.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