ARM: pxa: fix missing-prototypes warnings

The PXA platform has a number of configurations that end up with
a warning like these when building with W=1:

drivers/hwmon/max1111.c:83:5: error: no previous prototype for 'max1111_read_channel' [-Werror=missing-prototypes]
arch/arm/mach-pxa/reset.c:86:6: error: no previous prototype for 'pxa_restart' [-Werror=missing-prototypes]
arch/arm/mach-pxa/mfp-pxa2xx.c:254:5: error: no previous prototype for 'keypad_set_wake' [-Werror=missing-prototypes]
drivers/clk/pxa/clk-pxa25x.c:70:14: error: no previous prototype for 'pxa25x_get_clk_frequency_khz' [-Werror=missing-prototypes]
drivers/clk/pxa/clk-pxa25x.c:325:12: error: no previous prototype for 'pxa25x_clocks_init' [-Werror=missing-prototypes]
drivers/clk/pxa/clk-pxa27x.c:74:14: error: no previous prototype for 'pxa27x_get_clk_frequency_khz' [-Werror=missing-prototypes]
drivers/clk/pxa/clk-pxa27x.c:102:6: error: no previous prototype for 'pxa27x_is_ppll_disabled' [-Werror=missing-prototypes]
drivers/clk/pxa/clk-pxa27x.c:470:12: error: no previous prototype for 'pxa27x_clocks_init' [-Werror=missing-prototypes]
arch/arm/mach-pxa/pxa27x.c:44:6: error: no previous prototype for 'pxa27x_clear_otgph' [-Werror=missing-prototypes]
arch/arm/mach-pxa/pxa27x.c:58:6: error: no previous prototype for 'pxa27x_configure_ac97reset' [-Werror=missing-prototypes]
arch/arm/mach-pxa/spitz_pm.c:170:15: error: no previous prototype for 'spitzpm_read_devdata' [-Werror=missing-prototypes]

The problem is that there is a declaration for each of these, but
it's only seen by the caller and not the callee. Moving these
into appropriate header files ensures that both use the same
calling conventions and it avoids the warnings.

Acked-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20230516153109.514251-11-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-pxa/generic.h

@@ -27,7 +27,6 @@ extern void __init pxa25x_map_io(void);
 extern void __init pxa26x_init_irq(void);
 
 #define pxa27x_handle_irq ichp_handle_irq
-extern unsigned	pxa27x_get_clk_frequency_khz(int);
 extern void __init pxa27x_init_irq(void);
 extern void __init pxa27x_map_io(void);
 
@@ -52,18 +51,4 @@ extern void pxa2xx_clear_reset_status(unsigned int);
 static inline void pxa2xx_clear_reset_status(unsigned int mask) {}
 #endif
 
-/*
- * Once fully converted to the clock framework, all these functions should be
- * removed, and replaced with a clk_get(NULL, "core").
- */
-#ifdef CONFIG_PXA25x
-extern unsigned pxa25x_get_clk_frequency_khz(int);
-#else
-#define pxa25x_get_clk_frequency_khz(x)		(0)
-#endif
-
-#ifdef CONFIG_PXA27x
-#else
-#define pxa27x_get_clk_frequency_khz(x)		(0)
-#endif
 

arch/arm/mach-pxa/mfp-pxa2xx.c

@@ -20,6 +20,7 @@
 
 #include "pxa2xx-regs.h"
 #include "mfp-pxa2xx.h"
+#include "mfp-pxa27x.h"
 
 #include "generic.h"
 

arch/arm/mach-pxa/pxa25x.c

@@ -27,6 +27,7 @@
 #include <linux/irqchip.h>
 #include <linux/platform_data/mmp_dma.h>
 #include <linux/soc/pxa/cpu.h>
+#include <linux/soc/pxa/smemc.h>
 
 #include <asm/mach/map.h>
 #include <asm/suspend.h>

arch/arm/mach-pxa/pxa27x.c

@@ -24,6 +24,7 @@
 #include <linux/platform_data/i2c-pxa.h>
 #include <linux/platform_data/mmp_dma.h>
 #include <linux/soc/pxa/cpu.h>
+#include <linux/soc/pxa/smemc.h>
 
 #include <asm/mach/map.h>
 #include <asm/irq.h>
@@ -31,7 +32,9 @@
 #include "irqs.h"
 #include "pxa27x.h"
 #include "reset.h"
+#include <linux/platform_data/pxa2xx_udc.h>
 #include <linux/platform_data/usb-ohci-pxa27x.h>
+#include <linux/platform_data/asoc-pxa.h>
 #include "pm.h"
 #include "addr-map.h"
 #include "smemc.h"

arch/arm/mach-pxa/reset.c

@@ -10,6 +10,7 @@
 #include "regs-ost.h"
 #include "reset.h"
 #include "smemc.h"
+#include "generic.h"
 
 static void do_hw_reset(void);
 

arch/arm/mach-pxa/spitz_pm.c

@@ -166,7 +166,7 @@ static bool spitz_charger_wakeup(void)
 		gpio_get_value(SPITZ_GPIO_SYNC);
 }
 
-unsigned long spitzpm_read_devdata(int type)
+static unsigned long spitzpm_read_devdata(int type)
 {
 	switch (type) {
 	case SHARPSL_STATUS_ACIN:

drivers/clk/pxa/clk-pxa25x.c

@@ -11,10 +11,12 @@
  */
 #include <linux/clk-provider.h>
 #include <linux/clk.h>
+#include <linux/clk/pxa.h>
 #include <linux/clkdev.h>
 #include <linux/io.h>
 #include <linux/of.h>
 #include <linux/soc/pxa/smemc.h>
+#include <linux/soc/pxa/cpu.h>
 
 #include <dt-bindings/clock/pxa-clock.h>
 #include "clk-pxa.h"

drivers/clk/pxa/clk-pxa27x.c

@@ -12,6 +12,7 @@
 #include <linux/clkdev.h>
 #include <linux/of.h>
 #include <linux/soc/pxa/smemc.h>
+#include <linux/clk/pxa.h>
 
 #include <dt-bindings/clock/pxa-clock.h>
 #include "clk-pxa.h"
@@ -99,7 +100,7 @@ unsigned int pxa27x_get_clk_frequency_khz(int info)
 	return (unsigned int)clks[0] / KHz;
 }
 
-bool pxa27x_is_ppll_disabled(void)
+static bool pxa27x_is_ppll_disabled(void)
 {
 	unsigned long ccsr = readl(clk_regs + CCSR);
 

drivers/hwmon/max1111.c

@@ -80,6 +80,7 @@ static int max1111_read(struct device *dev, int channel)
 #ifdef CONFIG_SHARPSL_PM
 static struct max1111_data *the_max1111;
 
+int max1111_read_channel(int channel);
 int max1111_read_channel(int channel)
 {
 	if (!the_max1111 || !the_max1111->spi)

drivers/usb/gadget/udc/pxa27x_udc.c

@@ -2472,12 +2472,6 @@ static void pxa_udc_shutdown(struct platform_device *_dev)
 		udc_disable(udc);
 }
 
-#ifdef CONFIG_PXA27x
-extern void pxa27x_clear_otgph(void);
-#else
-#define pxa27x_clear_otgph()   do {} while (0)
-#endif
-
 #ifdef CONFIG_PM
 /**
  * pxa_udc_suspend - Suspend udc device

drivers/usb/host/ohci-pxa27x.c

@@ -29,6 +29,7 @@
 #include <linux/of_platform.h>
 #include <linux/of_gpio.h>
 #include <linux/platform_data/usb-ohci-pxa27x.h>
+#include <linux/platform_data/pxa2xx_udc.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/signal.h>
@@ -263,12 +264,6 @@ static inline void pxa27x_reset_hc(struct pxa27x_ohci *pxa_ohci)
 	__raw_writel(uhchr & ~UHCHR_FHR, pxa_ohci->mmio_base + UHCHR);
 }
 
-#ifdef CONFIG_PXA27x
-extern void pxa27x_clear_otgph(void);
-#else
-#define pxa27x_clear_otgph()	do {} while (0)
-#endif
-
 static int pxa27x_start_hc(struct pxa27x_ohci *pxa_ohci, struct device *dev)
 {
 	int retval;

include/linux/platform_data/asoc-pxa.h

@@ -27,5 +27,6 @@ typedef struct {
 } pxa2xx_audio_ops_t;
 
 extern void pxa_set_ac97_info(pxa2xx_audio_ops_t *ops);
+extern void pxa27x_configure_ac97reset(int reset_gpio, bool to_gpio);
 
 #endif

include/linux/platform_data/pxa2xx_udc.h

@@ -25,4 +25,10 @@ struct pxa2xx_udc_mach_info {
 	int	gpio_pullup;			/* high == pullup activated */
 };
 
+#ifdef CONFIG_PXA27x
+extern void pxa27x_clear_otgph(void);
+#else
+#define pxa27x_clear_otgph()	do {} while (0)
+#endif
+
 #endif

include/linux/soc/pxa/smemc.h

@@ -10,4 +10,20 @@ int pxa2xx_smemc_get_sdram_rows(void);
 unsigned int pxa3xx_smemc_get_memclkdiv(void);
 void __iomem *pxa_smemc_get_mdrefr(void);
 
+/*
+ * Once fully converted to the clock framework, all these functions should be
+ * removed, and replaced with a clk_get(NULL, "core").
+ */
+#ifdef CONFIG_PXA25x
+extern unsigned pxa25x_get_clk_frequency_khz(int);
+#else
+#define pxa25x_get_clk_frequency_khz(x)		(0)
+#endif
+
+#ifdef CONFIG_PXA27x
+extern unsigned pxa27x_get_clk_frequency_khz(int);
+#else
+#define pxa27x_get_clk_frequency_khz(x)		(0)
+#endif
+
 #endif

sound/arm/pxa2xx-ac97-lib.c

@@ -33,8 +33,6 @@ static struct clk *ac97conf_clk;
 static int reset_gpio;
 static void __iomem *ac97_reg_base;
 
-extern void pxa27x_configure_ac97reset(int reset_gpio, bool to_gpio);
-
 /*
  * Beware PXA27x bugs:
  *