[PATCH v5 12/12] mfd: cros_ec: Add throttler sub-device

[Matthias Kaehlcke]

Instantiate the CrOS EC throttler if it is enabled in the kernel
configuration.

Signed-off-by: Matthias Kaehlcke <m...@chromium.org>
Reviewed-by: Brian Norris <briannor...@chromium.org>
---
Changes in v5:
- added 'Reviewed-by: Brian Norris <briannor...@chromium.org>' tag

Changes in v4:
- register throttler in cros_ec_dev.c instead of cros_ec.c

Changes in v3:
- patch added to series
---
 drivers/mfd/cros_ec_dev.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
index eafd06f62a3a..9e56c2793075 100644
--- a/drivers/mfd/cros_ec_dev.c
+++ b/drivers/mfd/cros_ec_dev.c
@@ -383,6 +383,22 @@ static void cros_ec_sensors_register(struct cros_ec_dev 
*ec)
        kfree(msg);
 }
 
+static const struct mfd_cell ec_throttler_cells[] = {
+       { .name = "cros-ec-throttler" }
+};
+
+static void cros_ec_throttler_register(struct cros_ec_dev *ec)
+{
+       int ret;
+
+       ret = mfd_add_devices(ec->dev, 0, ec_throttler_cells,
+                             ARRAY_SIZE(ec_throttler_cells),
+                             NULL, 0, NULL);
+       if (ret)
+               dev_err(ec->dev,
+                       "failed to add cros-ec-throttler device: %d\n", ret);
+}
+
 static int ec_device_probe(struct platform_device *pdev)
 {
        int retval = -ENOMEM;
@@ -422,6 +438,9 @@ static int ec_device_probe(struct platform_device *pdev)
        if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE))
                cros_ec_sensors_register(ec);
 
+       if (IS_ENABLED(CONFIG_CROS_EC_THROTTLER))
+               cros_ec_throttler_register(ec);
+
        /* Take control of the lightbar from the EC. */
        lb_manual_suspend_ctrl(ec, 1);
 
-- 
2.18.0.203.gfac676dfb9-goog