[PATCH 16/25] arch: arm: mach-at91: pm: Move prototypes to mutually included header

[Lee Jones <lee.jones@linaro.org>]

Both the caller and the supplier's source file should have access to
the include file containing the prototypes.

Fixes the following W=1 kernel build warning(s):

 drivers/pinctrl/pinctrl-at91.c:1637:6: warning: no previous prototype for ‘at91_pinctrl_gpio_suspend’ [-Wmissing-prototypes]
 1637 | void at91_pinctrl_gpio_suspend(void)
 | ^~~~~~~~~~~~~~~~~~~~~~~~~
 drivers/pinctrl/pinctrl-at91.c:1661:6: warning: no previous prototype for ‘at91_pinctrl_gpio_resume’ [-Wmissing-prototypes]
 1661 | void at91_pinctrl_gpio_resume(void)
 | ^~~~~~~~~~~~~~~~~~~~~~~~

Cc: Russell King <linux@armlinux.org.uk>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 arch/arm/mach-at91/pm.c             | 17 ++++++-----------
 drivers/pinctrl/pinctrl-at91.c      |  1 +
 include/linux/platform_data/atmel.h |  5 +++++
 3 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 074bde64064e4..59f2a2d6fbbb8 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -25,17 +25,6 @@
 #include "generic.h"
 #include "pm.h"
 
-/*
- * FIXME: this is needed to communicate between the pinctrl driver and
- * the PM implementation in the machine. Possibly part of the PM
- * implementation should be moved down into the pinctrl driver and get
- * called as part of the generic suspend/resume path.
- */
-#ifdef CONFIG_PINCTRL_AT91
-extern void at91_pinctrl_gpio_suspend(void);
-extern void at91_pinctrl_gpio_resume(void);
-#endif
-
 struct at91_soc_pm {
 	int (*config_shdwc_ws)(void __iomem *shdwc, u32 *mode, u32 *polarity);
 	int (*config_pmc_ws)(void __iomem *pmc, u32 mode, u32 polarity);
@@ -325,6 +314,12 @@ static void at91_pm_suspend(suspend_state_t state)
 static int at91_pm_enter(suspend_state_t state)
 {
 #ifdef CONFIG_PINCTRL_AT91
+	/*
+	 * FIXME: this is needed to communicate between the pinctrl driver and
+	 * the PM implementation in the machine. Possibly part of the PM
+	 * implementation should be moved down into the pinctrl driver and get
+	 * called as part of the generic suspend/resume path.
+	 */
 	at91_pinctrl_gpio_suspend();
 #endif
 
diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
index 9c52130876597..37997e5ab0538 100644
--- a/drivers/pinctrl/pinctrl-at91.c
+++ b/drivers/pinctrl/pinctrl-at91.c
@@ -22,6 +22,7 @@
 #include <linux/pinctrl/pinmux.h>
 /* Since we request GPIOs from ourself */
 #include <linux/pinctrl/consumer.h>
+#include <linux/platform_data/atmel.h>
 
 #include "pinctrl-at91.h"
 #include "core.h"
diff --git a/include/linux/platform_data/atmel.h b/include/linux/platform_data/atmel.h
index 99e6069c5fd89..666ef482ea8c0 100644
--- a/include/linux/platform_data/atmel.h
+++ b/include/linux/platform_data/atmel.h
@@ -28,4 +28,9 @@ static inline int at91_suspend_entering_slow_clock(void)
 }
 #endif
 
+#ifdef CONFIG_PINCTRL_AT91
+void at91_pinctrl_gpio_suspend(void);
+void at91_pinctrl_gpio_resume(void);
+#endif
+
 #endif /* __ATMEL_H__ */
-- 
2.25.1