diff --git a/drivers/rtc/rtc-isl1208.c b/drivers/rtc/rtc-isl1208.c
index cefff1d863ac..42d2116d244d 100644
--- a/drivers/rtc/rtc-isl1208.c
+++ b/drivers/rtc/rtc-isl1208.c
@@ -68,41 +68,51 @@
 
 static struct i2c_driver isl1208_driver;
 
-/* ISL1208 various variants */
-enum isl1208_id {
-	TYPE_ISL1208 = 0,
-	TYPE_ISL1209,
-	TYPE_ISL1218,
-	TYPE_ISL1219,
-	ISL_LAST_ID
-};
-
 /* Chip capabilities table */
-static const struct isl1208_config {
+struct isl1208_config {
 	unsigned int	nvmem_length;
 	unsigned	has_tamper:1;
 	unsigned	has_timestamp:1;
-} isl1208_configs[] = {
-	[TYPE_ISL1208] = { 2, false, false },
-	[TYPE_ISL1209] = { 2, true,  false },
-	[TYPE_ISL1218] = { 8, false, false },
-	[TYPE_ISL1219] = { 2, true,  true },
+};
+
+static const struct isl1208_config config_isl1208 = {
+	.nvmem_length = 2,
+	.has_tamper = false,
+	.has_timestamp = false
+};
+
+static const struct isl1208_config config_isl1209 = {
+	.nvmem_length = 2,
+	.has_tamper = true,
+	.has_timestamp = false
+};
+
+static const struct isl1208_config config_isl1218 = {
+	.nvmem_length = 8,
+	.has_tamper = false,
+	.has_timestamp = false
+};
+
+static const struct isl1208_config config_isl1219 = {
+	.nvmem_length = 2,
+	.has_tamper = true,
+	.has_timestamp = true
 };
 
 static const struct i2c_device_id isl1208_id[] = {
-	{ "isl1208", .driver_data = (kernel_ulong_t)&isl1208_configs[TYPE_ISL1208] },
-	{ "isl1209", .driver_data = (kernel_ulong_t)&isl1208_configs[TYPE_ISL1209] },
-	{ "isl1218", .driver_data = (kernel_ulong_t)&isl1208_configs[TYPE_ISL1218] },
-	{ "isl1219", .driver_data = (kernel_ulong_t)&isl1208_configs[TYPE_ISL1219] },
+	{ "isl1208", .driver_data = (kernel_ulong_t)&config_isl1208 },
+	{ "isl1209", .driver_data = (kernel_ulong_t)&config_isl1209 },
+	{ "isl1218", .driver_data = (kernel_ulong_t)&config_isl1218 },
+	{ "isl1219", .driver_data = (kernel_ulong_t)&config_isl1219 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, isl1208_id);
 
 static const __maybe_unused struct of_device_id isl1208_of_match[] = {
-	{ .compatible = "isil,isl1208", .data = &isl1208_configs[TYPE_ISL1208] },
-	{ .compatible = "isil,isl1209", .data = &isl1208_configs[TYPE_ISL1209] },
-	{ .compatible = "isil,isl1218", .data = &isl1208_configs[TYPE_ISL1218] },
-	{ .compatible = "isil,isl1219", .data = &isl1208_configs[TYPE_ISL1219] },
+	{ .compatible = "isil,isl1208", .data = &config_isl1208 },
+	{ .compatible = "isil,isl1209", .data = &config_isl1209 },
+	{ .compatible = "isil,isl1218", .data = &config_isl1218 },
+	{ .compatible = "isil,isl1219", .data = &config_isl1219 },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, isl1208_of_match);