[PATCH 3/9] clk: imx: Support building SCU clock driver as module

[Anson Huang <Anson.Huang@nxp.com>]

There are more and more requirements of building SoC specific drivers
as modules, add support for building SCU clock driver as module to meet
the requirement.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
 drivers/clk/imx/Kconfig   | 2 +-
 drivers/clk/imx/Makefile  | 5 ++---
 drivers/clk/imx/clk-scu.c | 5 +++++
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/clk/imx/Kconfig b/drivers/clk/imx/Kconfig
index db0253f..503d6c8 100644
--- a/drivers/clk/imx/Kconfig
+++ b/drivers/clk/imx/Kconfig
@@ -5,7 +5,7 @@ config MXC_CLK
 	def_bool ARCH_MXC
 
 config MXC_CLK_SCU
-	bool
+	tristate "IMX SCU clock"
 	depends on IMX_SCU
 
 config CLK_IMX8MM
diff --git a/drivers/clk/imx/Makefile b/drivers/clk/imx/Makefile
index 928f874..1af8cff 100644
--- a/drivers/clk/imx/Makefile
+++ b/drivers/clk/imx/Makefile
@@ -21,9 +21,8 @@ obj-$(CONFIG_MXC_CLK) += \
 	clk-sscg-pll.o \
 	clk-pll14xx.o
 
-obj-$(CONFIG_MXC_CLK_SCU) += \
-	clk-scu.o \
-	clk-lpcg-scu.o
+mxc-clk-scu-objs += clk-scu.o clk-lpcg-scu.o
+obj-$(CONFIG_MXC_CLK_SCU) += mxc-clk-scu.o
 
 obj-$(CONFIG_CLK_IMX8MM) += clk-imx8mm.o
 obj-$(CONFIG_CLK_IMX8MN) += clk-imx8mn.o
diff --git a/drivers/clk/imx/clk-scu.c b/drivers/clk/imx/clk-scu.c
index b8b2072..9688981 100644
--- a/drivers/clk/imx/clk-scu.c
+++ b/drivers/clk/imx/clk-scu.c
@@ -8,6 +8,7 @@
 #include <linux/arm-smccc.h>
 #include <linux/clk-provider.h>
 #include <linux/err.h>
+#include <linux/module.h>
 #include <linux/slab.h>
 
 #include "clk-scu.h"
@@ -132,6 +133,7 @@ int imx_clk_scu_init(void)
 {
 	return imx_scu_get_handle(&ccm_ipc_handle);
 }
+EXPORT_SYMBOL_GPL(imx_clk_scu_init);
 
 /*
  * clk_scu_recalc_rate - Get clock rate for a SCU clock
@@ -387,3 +389,6 @@ struct clk_hw *__imx_clk_scu(const char *name, const char * const *parents,
 
 	return hw;
 }
+EXPORT_SYMBOL_GPL(__imx_clk_scu);
+
+MODULE_LICENSE("GPL v2");
-- 
2.7.4