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ARM: at91: fix at91_suspend_entering_slow_clock link error

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When CONFIG_ARCH_AT91 is enabled, but none of the specific SoC support
is in use, some at91 specific drivers fail to link:

drivers/tty/serial/atmel_serial.o: In function `atmel_serial_suspend':
atmel_serial.c:(.text.atmel_serial_suspend+0x1e): undefined reference to `at91_suspend_entering_slow_clock'
drivers/usb/host/ohci-at91.o: In function `ohci_hcd_at91_drv_suspend':
ohci-at91.c:(.text.ohci_hcd_at91_drv_suspend+0x12): undefined reference to `at91_suspend_entering_slow_clock'
drivers/usb/gadget/udc/at91_udc.o: In function `at91udc_suspend':
at91_udc.c:(.text.at91udc_suspend+0x26): undefined reference to `at91_suspend_entering_slow_clock'

This changes the at91_suspend_entering_slow_clock hack once more, adding
an alternative inline implementation that is used exactly in those cases
that don't provide the normal implementation.

Fixes: c1892c2379d2 ("ARM: at91: handle CONFIG_PM for armv7m configurations")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Arnd Bergmann 2017-06-09 12:18:02 +02:00 committed by Alexandre Belloni
parent 63e07c0fdc
commit be36e000bc
2 changed files with 7 additions and 9 deletions
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9
arch/arm/mach-at91/samv7.c
View File

@ -15,15 +15,6 @@
#include <asm/system_misc.h>
#include "generic.h"
#ifdef CONFIG_PM
/* This function has to be defined for various drivers that are using it */
int at91_suspend_entering_slow_clock(void)
{
return 0;
}
EXPORT_SYMBOL(at91_suspend_entering_slow_clock);
#endif
static const char *const samv7_dt_board_compat[] __initconst = {
"atmel,samv7",
NULL

7
include/linux/platform_data/atmel.h
View File

@ -52,6 +52,13 @@ struct atmel_uart_data {
};
/* FIXME: this needs a better location, but gets stuff building again */
#ifdef CONFIG_ATMEL_PM
extern int at91_suspend_entering_slow_clock(void);
#else
static inline int at91_suspend_entering_slow_clock(void)
{
return 0;
}
#endif
#endif /* __ATMEL_H__ */