mfd: cros_ec_dev: Add CEC sub-device registration

The EC can expose a CEC bus, thus add the cros-ec-cec MFD sub-device
when the CEC feature bit is present.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
index 306e1fd109bdd8d3724e4ff2070d7c457aef20bb..1e2049f7229e0d06d4f262a962db399814f24169 100644 (file)
--- a/drivers/mfd/cros_ec_dev.c
+++ b/drivers/mfd/cros_ec_dev.c
@@ -377,6 +377,10 @@ static void cros_ec_sensors_register(struct cros_ec_dev *ec)
        kfree(msg);
 }
 
+static const struct mfd_cell cros_ec_cec_cells[] = {
+       { .name = "cros-ec-cec" }
+};
+
 static const struct mfd_cell cros_ec_rtc_cells[] = {
        { .name = "cros-ec-rtc" }
 };
@@ -419,6 +423,18 @@ 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 CEC host command support */
+       if (cros_ec_check_features(ec, EC_FEATURE_CEC)) {
+               retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
+                                        cros_ec_cec_cells,
+                                        ARRAY_SIZE(cros_ec_cec_cells),
+                                        NULL, 0, NULL);
+               if (retval)
+                       dev_err(ec->dev,
+                               "failed to add cros-ec-cec device: %d\n",
+                               retval);
+       }
+
        /* 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,