diff --git a/drivers/clk/bcm/clk-raspberrypi.c b/drivers/clk/bcm/clk-raspberrypi.c
index 4df921d1e21ca9a8fba8475ad556e42f2b712577..876b37b8683c582ef56b0ce36e1e5ea8395d9fa2 100644
--- a/drivers/clk/bcm/clk-raspberrypi.c
+++ b/drivers/clk/bcm/clk-raspberrypi.c
@@ -365,7 +365,8 @@ static int raspberrypi_discover_clocks(struct raspberrypi_clk *rpi,
 		struct raspberrypi_clk_variant *variant;
 
 		if (clks->id > RPI_FIRMWARE_NUM_CLK_ID) {
-			dev_err(rpi->dev, "Unknown clock id: %u\n", clks->id);
+			dev_err(rpi->dev, "Unknown clock id: %u (max: %u)\n",
+					   clks->id, RPI_FIRMWARE_NUM_CLK_ID);
 			return -EINVAL;
 		}