linux-kernel - [PATCH 1/7] clk: samsung: s3c64xx: Declare s3c64xx_clk

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Message-Id: <20200729160942.28867-2-krzk@kernel.org>
Date:   Wed, 29 Jul 2020 18:09:36 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Russell King <linux@...linux.org.uk>,
        Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Vincent Sanders <vince@...tec.co.uk>,
        Simtec Linux Team <linux@...tec.co.uk>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Arnd Bergmann <arnd@...db.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        patches@...nsource.cirrus.com, linux-clk@...r.kernel.org,
        linux-watchdog@...r.kernel.org
Cc:     Sergio Prado <sergio.prado@...abworks.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Sylwester Nawrocki <snawrocki@...nel.org>,
        Cedric Roux <sed@...e.fr>, Lihua Yao <ylhuajnu@...look.com>
Subject: [PATCH 1/7] clk: samsung: s3c64xx: Declare s3c64xx_clk_init() in shared header

The s3c64xx_clk_init() is defined and used by clk-s3c64xx driver and
also used in mach-s3c64xx machine code.  Move the declaration to a
header to fix W=1 build warning:

    drivers/clk/samsung/clk-s3c64xx.c:391:13: warning: no previous prototype for 's3c64xx_clk_init' [-Wmissing-prototypes]
      391 | void __init s3c64xx_clk_init(struct device_node *np, unsigned long xtal_f,

Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
---
 MAINTAINERS                       |  1 +
 arch/arm/mach-s3c64xx/common.c    |  1 +
 arch/arm/mach-s3c64xx/common.h    |  2 --
 drivers/clk/samsung/clk-s3c64xx.c |  1 +
 include/linux/clk/samsung.h       | 21 +++++++++++++++++++++
 5 files changed, 24 insertions(+), 2 deletions(-)
 create mode 100644 include/linux/clk/samsung.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 7f8c6e41a364..f5d7cf3c3aaa 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15294,6 +15294,7 @@ F:	Documentation/devicetree/bindings/clock/samsung,s3c*
 F:	Documentation/devicetree/bindings/clock/samsung,s5p*
 F:	drivers/clk/samsung/
 F:	include/dt-bindings/clock/exynos*.h
+F:	include/linux/clk/samsung.h
 
 SAMSUNG SPI DRIVERS
 M:	Kukjin Kim <kgene@...nel.org>
diff --git a/arch/arm/mach-s3c64xx/common.c b/arch/arm/mach-s3c64xx/common.c
index 13e91074308a..a655bf0c7802 100644
--- a/arch/arm/mach-s3c64xx/common.c
+++ b/arch/arm/mach-s3c64xx/common.c
@@ -24,6 +24,7 @@
 #include <linux/platform_device.h>
 #include <linux/reboot.h>
 #include <linux/io.h>
+#include <linux/clk/samsung.h>
 #include <linux/dma-mapping.h>
 #include <linux/irq.h>
 #include <linux/gpio.h>
diff --git a/arch/arm/mach-s3c64xx/common.h b/arch/arm/mach-s3c64xx/common.h
index 03670887a764..f4eca42cdc86 100644
--- a/arch/arm/mach-s3c64xx/common.h
+++ b/arch/arm/mach-s3c64xx/common.h
@@ -22,8 +22,6 @@ void s3c64xx_init_io(struct map_desc *mach_desc, int size);
 void s3c64xx_restart(enum reboot_mode mode, const char *cmd);
 
 struct device_node;
-void s3c64xx_clk_init(struct device_node *np, unsigned long xtal_f,
-	unsigned long xusbxti_f, bool is_s3c6400, void __iomem *reg_base);
 void s3c64xx_set_xtal_freq(unsigned long freq);
 void s3c64xx_set_xusbxti_freq(unsigned long freq);
 
diff --git a/drivers/clk/samsung/clk-s3c64xx.c b/drivers/clk/samsung/clk-s3c64xx.c
index b96d33e5eb45..56f95b63f71f 100644
--- a/drivers/clk/samsung/clk-s3c64xx.c
+++ b/drivers/clk/samsung/clk-s3c64xx.c
@@ -7,6 +7,7 @@
 
 #include <linux/slab.h>
 #include <linux/clk-provider.h>
+#include <linux/clk/samsung.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 
diff --git a/include/linux/clk/samsung.h b/include/linux/clk/samsung.h
new file mode 100644
index 000000000000..b6b253c46c22
--- /dev/null
+++ b/include/linux/clk/samsung.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2020 Krzysztof Kozlowski <krzk@...nel.org>
+ */
+
+#ifndef __LINUX_CLK_SAMSUNG_H_
+#define __LINUX_CLK_SAMSUNG_H_
+
+#ifdef CONFIG_ARCH_S3C64XX
+void __init s3c64xx_clk_init(struct device_node *np, unsigned long xtal_f,
+			     unsigned long xusbxti_f, bool s3c6400,
+			     void __iomem *base);
+#else
+static inline void __init s3c64xx_clk_init(struct device_node *np,
+					   unsigned long xtal_f,
+					   unsigned long xusbxti_f,
+					   bool s3c6400,
+					   void __iomem *base) { }
+#endif /* CONFIG_ARCH_S3C64XX */
+
+#endif /* __LINUX_CLK_SAMSUNG_H_ */
-- 
2.17.1