diff options
| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2016-09-21 11:29:01 +0900 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-09-23 22:25:44 -0400 |
| commit | 4815db87f518ba6d4f070cfbcb6959ea7720775d (patch) | |
| tree | 3c921d5f5b2bf0539e8383152259cc943d2d4edf /include/reset.h | |
| parent | 259ede1132724a82327e06808884d4debba6f8eb (diff) | |
reset: add no-op stubs for optional reset control
My motivation for this patch is to make reset control handling
optional for generic drivers.
I want to add reset control to drivers/usb/host/ehci-generic.c,
but it is used by several platforms, some will implement a reset
controller driver, some will not.
Add no-op stubs in order to avoid link error for drivers that
implement reset controlling, but still it is optional.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'include/reset.h')
| -rw-r--r-- | include/reset.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/reset.h b/include/reset.h index dc0900f96a..f45fcf88c4 100644 --- a/include/reset.h +++ b/include/reset.h @@ -7,6 +7,8 @@ #ifndef _RESET_H #define _RESET_H +#include <linux/errno.h> + /** * A reset is a hardware signal indicating that a HW module (or IP block, or * sometimes an entire off-CPU chip) reset all of its internal state to some @@ -58,6 +60,7 @@ struct reset_ctl { unsigned long id; }; +#ifdef CONFIG_DM_RESET /** * reset_get_by_index - Get/request a reset signal by integer index. * @@ -132,4 +135,33 @@ int reset_assert(struct reset_ctl *reset_ctl); */ int reset_deassert(struct reset_ctl *reset_ctl); +#else +static inline int reset_get_by_index(struct udevice *dev, int index, + struct reset_ctl *reset_ctl) +{ + return -ENOTSUPP; +} + +static inline int reset_get_by_name(struct udevice *dev, const char *name, + struct reset_ctl *reset_ctl) +{ + return -ENOTSUPP; +} + +static inline int reset_free(struct reset_ctl *reset_ctl) +{ + return 0; +} + +static inline int reset_assert(struct reset_ctl *reset_ctl) +{ + return 0; +} + +static inline int reset_deassert(struct reset_ctl *reset_ctl) +{ + return 0; +} +#endif + #endif |