diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9322.c b/drivers/gpu/drm/panel/panel-ilitek-ili9322.c
index 4a6dcfd781e8336fc5a8af893dfbb6d2baace80e..94b7dfef3b5e280f02f3127e965e418b6d497c7f 100644
--- a/drivers/gpu/drm/panel/panel-ilitek-ili9322.c
+++ b/drivers/gpu/drm/panel/panel-ilitek-ili9322.c
@@ -318,7 +318,7 @@ static int ili9322_regmap_spi_read(void *context, const void *reg,
 	return spi_write_then_read(spi, buf, 1, val, 1);
 }
 
-static struct regmap_bus ili9322_regmap_bus = {
+static const struct regmap_bus ili9322_regmap_bus = {
 	.write = ili9322_regmap_spi_write,
 	.read = ili9322_regmap_spi_read,
 	.reg_format_endian_default = REGMAP_ENDIAN_BIG,