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Subject[PATCH 4/5] mfd: cros_ec_dev: Add CEC sub-device registration
Date
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>
---
drivers/mfd/cros_ec_dev.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
index eafd06f..57064ec 100644
--- a/drivers/mfd/cros_ec_dev.c
+++ b/drivers/mfd/cros_ec_dev.c
@@ -383,6 +383,18 @@ static void cros_ec_sensors_register(struct cros_ec_dev *ec)
kfree(msg);
}

+static void cros_ec_cec_register(struct cros_ec_dev *ec)
+{
+ int ret;
+ struct mfd_cell cec_cell = {
+ .name = "cros-ec-cec",
+ };
+
+ ret = mfd_add_devices(ec->dev, 0, &cec_cell, 1, NULL, 0, NULL);
+ if (ret)
+ dev_err(ec->dev, "failed to add EC CEC\n");
+}
+
static int ec_device_probe(struct platform_device *pdev)
{
int retval = -ENOMEM;
@@ -422,6 +434,10 @@ 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 handles CEC. */
+ if (cros_ec_check_features(ec, EC_FEATURE_CEC))
+ cros_ec_cec_register(ec);
+
/* Take control of the lightbar from the EC. */
lb_manual_suspend_ctrl(ec, 1);

--
2.7.4
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