clk: eswin: Add eic7700 clock driver

Add clock drivers for the EIC7700 SoC. The clock controller on the ESWIN
EIC7700 provides various clocks to different IP blocks within the SoC.

Signed-off-by: Yifeng Huang <huangyifeng@eswincomputing.com>
Tested-by: Marcel Ziswiler <marcel@ziswiler.com> # ebc77
Reviewed-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Xuyang Dong <dongxuyang@eswincomputing.com>
Tested-by: Bo Gan <ganboing@gmail.com> # hfp550
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Author: dongxuyangeswincomputing

drivers/clk/Kconfig

@@ -504,6 +504,7 @@ source "drivers/clk/analogbits/Kconfig"
 source "drivers/clk/aspeed/Kconfig"
 source "drivers/clk/baikal-t1/Kconfig"
 source "drivers/clk/bcm/Kconfig"
+source "drivers/clk/eswin/Kconfig"
 source "drivers/clk/hisilicon/Kconfig"
 source "drivers/clk/imgtec/Kconfig"
 source "drivers/clk/imx/Kconfig"

drivers/clk/Makefile

@@ -120,6 +120,7 @@ obj-$(CONFIG_CLK_BAIKAL_T1)		+= baikal-t1/
 obj-y					+= bcm/
 obj-$(CONFIG_ARCH_BERLIN)		+= berlin/
 obj-$(CONFIG_ARCH_DAVINCI)		+= davinci/
+obj-$(CONFIG_COMMON_CLK_ESWIN)		+= eswin/
 obj-$(CONFIG_ARCH_HISI)			+= hisilicon/
 obj-y					+= imgtec/
 obj-y					+= imx/

drivers/clk/eswin/Kconfig

@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config COMMON_CLK_ESWIN
+	bool
+
+config COMMON_CLK_EIC7700
+	tristate "EIC7700 Clock Driver"
+	depends on ARCH_ESWIN || COMPILE_TEST
+	select COMMON_CLK_ESWIN
+	default ARCH_ESWIN
+	help
+	  This driver provides support for clock controller on ESWIN EIC7700
+	  SoC. The clock controller generates and supplies clocks to various
+	  peripherals within the SoC.
+	  Say yes here to support the clock controller on the EIC7700 SoC.

drivers/clk/eswin/Makefile

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Eswin Clock specific Makefile
+#
+
+obj-$(CONFIG_COMMON_CLK_ESWIN)		+= clk.o
+
+obj-$(CONFIG_COMMON_CLK_EIC7700)	+= clk-eic7700.o