X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-uboot.git;a=blobdiff_plain;f=drivers%2Fmisc%2Fcros_ec_spi.c;h=ef73782606e21301a14ba7ae5c500ef5c404db3a;hp=2fc911025eeb5e01c76b9a9ace2eeabc6dbdc149;hb=e8c12662364fbcf5ea917d341f707534c8574900;hpb=836bb6e8277aaa8f0f86e39b0c38b207d32723d9;ds=sidebyside

diff --git a/drivers/misc/cros_ec_spi.c b/drivers/misc/cros_ec_spi.c
index 2fc911025e..ef73782606 100644
--- a/drivers/misc/cros_ec_spi.c
+++ b/drivers/misc/cros_ec_spi.c
@@ -42,6 +42,12 @@ int cros_ec_spi_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
 	int csum, len;
 	int rv;
 
+	if (dev->protocol_version != 2) {
+		debug("%s: Unsupported EC protcol version %d\n",
+		      __func__, dev->protocol_version);
+		return -1;
+	}
+
 	/*
 	 * Sanity-check input size to make sure it plus transaction overhead
 	 * fits in the internal device buffer.