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Subject[PATCH 4/4] mfd: cros_ec: add RTC as mfd subdevice
Date
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/platform/chrome/cros_ec_dev.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/drivers/platform/chrome/cros_ec_dev.c b/drivers/platform/chrome/cros_ec_dev.c
index 47268ec..ebe029d 100644
--- a/drivers/platform/chrome/cros_ec_dev.c
+++ b/drivers/platform/chrome/cros_ec_dev.c
@@ -383,6 +383,24 @@ static void cros_ec_sensors_register(struct cros_ec_dev *ec)
kfree(msg);
}

+static const struct mfd_cell cros_ec_rtc_devs[] = {
+ {
+ .name = "cros-ec-rtc",
+ .id = -1,
+ },
+};
+
+static void cros_ec_rtc_register(struct cros_ec_dev *ec)
+{
+ int ret;
+
+ ret = mfd_add_devices(ec->dev, 0, cros_ec_rtc_devs,
+ ARRAY_SIZE(cros_ec_rtc_devs),
+ NULL, 0, NULL);
+ if (ret)
+ dev_err(ec->dev, "failed to add cros-ec-rtc device: %d\n", ret);
+}
+
static int ec_device_probe(struct platform_device *pdev)
{
int retval = -ENOMEM;
@@ -441,6 +459,10 @@ 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))
+ cros_ec_rtc_register(ec);
+
return 0;

dev_reg_failed:
--
2.9.3
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