linux-kernel - [PATCH V2 3/9] clk: imx: Support building SCU clock driver as module

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Date:   Tue,  9 Jun 2020 15:32:07 +0800
From:   Anson Huang <Anson.Huang@....com>
To:     linux@...linux.org.uk, shawnguo@...nel.org, s.hauer@...gutronix.de,
        kernel@...gutronix.de, festevam@...il.com, mturquette@...libre.com,
        sboyd@...nel.org, oleksandr.suvorov@...adex.com,
        stefan.agner@...adex.com, arnd@...db.de, abel.vesa@....com,
        peng.fan@....com, aisheng.dong@....com, tglx@...utronix.de,
        allison@...utok.net, gregkh@...uxfoundation.org, info@...ux.net,
        leonard.crestez@....com, fugang.duan@....com,
        daniel.baluta@....com, yuehaibing@...wei.com, sfr@...b.auug.org.au,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org
Cc:     Linux-imx@....com
Subject: [PATCH V2 3/9] clk: imx: Support building SCU clock driver as module

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@....com>
---
Changes since V1:
	- add ARCH_MXC to build dependency to avoid build fail on x86 arch;
	- move clk-lpcg-scu.c change in to this patch.
---
 drivers/clk/imx/Kconfig        | 4 ++--
 drivers/clk/imx/Makefile       | 5 ++---
 drivers/clk/imx/clk-lpcg-scu.c | 1 +
 drivers/clk/imx/clk-scu.c      | 5 +++++
 4 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/imx/Kconfig b/drivers/clk/imx/Kconfig
index db0253f..ded0643 100644
--- a/drivers/clk/imx/Kconfig
+++ b/drivers/clk/imx/Kconfig
@@ -5,8 +5,8 @@ config MXC_CLK
 	def_bool ARCH_MXC
 
 config MXC_CLK_SCU
-	bool
-	depends on IMX_SCU
+	tristate "IMX SCU clock"
+	depends on ARCH_MXC && IMX_SCU
 
 config CLK_IMX8MM
 	bool "IMX8MM CCM Clock Driver"
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-lpcg-scu.c b/drivers/clk/imx/clk-lpcg-scu.c
index a73a799..8177f0e 100644
--- a/drivers/clk/imx/clk-lpcg-scu.c
+++ b/drivers/clk/imx/clk-lpcg-scu.c
@@ -114,3 +114,4 @@ struct clk_hw *imx_clk_lpcg_scu(const char *name, const char *parent_name,
 
 	return hw;
 }
+EXPORT_SYMBOL_GPL(imx_clk_lpcg_scu);
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