[PATCH v2 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>
---

v2: Moved shared header to: include/soc/at91/pm.h

 arch/arm/mach-at91/pm.c        | 19 ++++++++-----------
 drivers/pinctrl/pinctrl-at91.c |  2 ++
 include/soc/at91/pm.h          |  9 +++++++++
 3 files changed, 19 insertions(+), 11 deletions(-)
 create mode 100644 include/soc/at91/pm.h

diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 120f9aa6fff32..90dcdfe3b3d0d 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -17,6 +17,8 @@
 #include <linux/clk/at91_pmc.h>
 #include <linux/platform_data/atmel.h>
 
+#include <soc/at91/pm.h>
+
 #include <asm/cacheflush.h>
 #include <asm/fncpy.h>
 #include <asm/system_misc.h>
@@ -25,17 +27,6 @@
 #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);
@@ -326,6 +317,12 @@ 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 72edc675431ce..0a7e10d39505c 100644
--- a/drivers/pinctrl/pinctrl-at91.c
+++ b/drivers/pinctrl/pinctrl-at91.c
@@ -23,6 +23,8 @@
 /* Since we request GPIOs from ourself */
 #include <linux/pinctrl/consumer.h>
 
+#include <soc/at91/pm.h>
+
 #include "pinctrl-at91.h"
 #include "core.h"
 
diff --git a/include/soc/at91/pm.h b/include/soc/at91/pm.h
new file mode 100644
index 0000000000000..0fd5093f7f73a
--- /dev/null
+++ b/include/soc/at91/pm.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * atmel platform data
+ */
+
+#ifdef CONFIG_PINCTRL_AT91
+void at91_pinctrl_gpio_suspend(void);
+void at91_pinctrl_gpio_resume(void);
+#endif
-- 
2.25.1