cros_ec: Support reading EC features
The EC can support a variety of features and provides a way to find out
what is available. Add support for this.
Also update the feature list to the lastest available while we are here.
This is at:
https://chromium.googlesource.com/chromiumos/platform/ec/+/refs/heads/master/include/ec_commands.h
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/misc/cros_ec.c b/drivers/misc/cros_ec.c
index 80709be..fd2f2ab 100644
--- a/drivers/misc/cros_ec.c
+++ b/drivers/misc/cros_ec.c
@@ -1344,19 +1344,33 @@
return 0;
}
-int cros_ec_check_feature(struct udevice *dev, int feature)
+int cros_ec_get_features(struct udevice *dev, u64 *featuresp)
{
struct ec_response_get_features r;
int rv;
- rv = ec_command(dev, EC_CMD_GET_FEATURES, 0, &r, sizeof(r), NULL, 0);
- if (rv)
- return rv;
+ rv = ec_command(dev, EC_CMD_GET_FEATURES, 0, NULL, 0, &r, sizeof(r));
+ if (rv != sizeof(r))
+ return -EIO;
+ *featuresp = r.flags[0] | (u64)r.flags[1] << 32;
+
+ return 0;
+}
+
+int cros_ec_check_feature(struct udevice *dev, uint feature)
+{
+ struct ec_response_get_features r;
+ int rv;
+
+ rv = ec_command(dev, EC_CMD_GET_FEATURES, 0, NULL, 0, &r, sizeof(r));
+ if (rv != sizeof(r))
+ return -EIO;
if (feature >= 8 * sizeof(r.flags))
- return -1;
+ return -EINVAL;
- return r.flags[feature / 32] & EC_FEATURE_MASK_0(feature);
+ return r.flags[feature / 32] & EC_FEATURE_MASK_0(feature) ? true :
+ false;
}
/*