dm: syscon: Provide a generic syscon driver

Provide a trivial syscon driver matching the generic "syscon" compatible
string, allowing for simple system controllers to be used without a
custom driver just as in Linux.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>

diff --git a/drivers/core/syscon-uclass.c b/drivers/core/syscon-uclass.c
index 01bd9683a7a757ccf20a9a769c83ee1555350cd6..2148469abc10e1e13468bc0ed58c695446d20c08 100644 (file)
--- a/drivers/core/syscon-uclass.c
+++ b/drivers/core/syscon-uclass.c
@@ -95,3 +95,14 @@ UCLASS_DRIVER(syscon) = {
        .per_device_auto_alloc_size = sizeof(struct syscon_uc_info),
        .pre_probe = syscon_pre_probe,
 };
+
+static const struct udevice_id generic_syscon_ids[] = {
+       { .compatible = "syscon" },
+       { }
+};
+
+U_BOOT_DRIVER(generic_syscon) = {
+       .name   = "syscon",
+       .id     = UCLASS_SYSCON,
+       .of_match = generic_syscon_ids,
+};