clk: ti: add divider clock driver

The patch adds support for TI divider clock binding. The driver uses
routines provided by the common clock framework (ccf).

The code is based on the drivers/clk/ti/divider.c driver of the Linux
kernel version 5.9-rc7.
For DT binding details see:
- Documentation/devicetree/bindings/clock/ti/divider.txt

Signed-off-by: Dario Binacchi <dariobin@libero.it>
diff --git a/drivers/clk/ti/clk.h b/drivers/clk/ti/clk.h
new file mode 100644
index 0000000..601c382
--- /dev/null
+++ b/drivers/clk/ti/clk.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * TI clock utilities header
+ *
+ * Copyright (C) 2020 Dario Binacchi <dariobin@libero.it>
+ */
+
+#ifndef _CLK_TI_H
+#define _CLK_TI_H
+
+void clk_ti_latch(fdt_addr_t reg, s8 shift);
+
+#endif /* #ifndef _CLK_TI_H */