mfd: cros_ec_dev: Register cros-ec-rtc driver as a subdevice

Check whether this EC instance has RTC host command support and instatiate
the RTC driver as a subdevice in such case.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.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 5a7d4e1dea708cdd3fe4048f84f5b1157ba9b3fc..a393b3c11aa068c3612a7801b41b27f265bcbed3 100644 (file)
--- a/drivers/mfd/cros_ec_dev.c
+++ b/drivers/mfd/cros_ec_dev.c
@@ -383,6 +383,10 @@ static void cros_ec_sensors_register(struct cros_ec_dev *ec)
        kfree(msg);
 }
 
+static const struct mfd_cell cros_ec_rtc_cells[] = {
+       { .name = "cros-ec-rtc" }
+};
+
 static int ec_device_probe(struct platform_device *pdev)
 {
        int retval = -ENOMEM;
@@ -422,6 +426,18 @@ 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 RTC host command support */
+       if (cros_ec_check_features(ec, EC_FEATURE_RTC)) {
+               retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
+                                        cros_ec_rtc_cells,
+                                        ARRAY_SIZE(cros_ec_rtc_cells),
+                                        NULL, 0, NULL);
+               if (retval)
+                       dev_err(ec->dev,
+                               "failed to add cros-ec-rtc device: %d\n",
+                               retval);
+       }
+
        /* Take control of the lightbar from the EC. */
        lb_manual_suspend_ctrl(ec, 1);