Hi Peng,
On 9 January 2018 at 04:11, Peng Fan peng.fan@nxp.com wrote:
Add heler functions for wait mask set/clr.
Signed-off-by: Peng Fan peng.fan@nxp.com Cc: Stefano Babic sbabic@denx.de Cc: Fabio Estevam fabio.estevam@nxp.com Cc: Masahiro Yamada yamada.masahiro@socionext.com Cc: Simon Glass sjg@chromium.org
include/linux/delay.h | 4 ++++ lib/time.c | 30 ++++++++++++++++++++++++++++++ 2 files changed, 34 insertions(+)
diff --git a/include/linux/delay.h b/include/linux/delay.h index 3dcd435d0d..b08fcb8c09 100644 --- a/include/linux/delay.h +++ b/include/linux/delay.h @@ -21,4 +21,8 @@ static inline void ndelay(unsigned long nsec) udelay(DIV_ROUND_UP(nsec, 1000)); }
+int wait_mask_set_timeout(void *addr, u32 mask, u32 timeout);
+int wait_mask_clr_timeout(void *addr, u32 mask, u32 timeout);
#endif /* defined(_LINUX_DELAY_H) */ diff --git a/lib/time.c b/lib/time.c index aed1a091f2..9701287629 100644 --- a/lib/time.c +++ b/lib/time.c @@ -171,3 +171,33 @@ void udelay(unsigned long usec) usec -= kv; } while(usec); }
+int wait_mask_set_timeout(void *addr, u32 mask, u32 timeout) +{
unsigned long long end_tick;u32 val;end_tick = usec_to_tick(timeout) + get_ticks();do {val = readl(addr);if ((val & mask) == mask)return 0;} while (end_tick > get_ticks());return -ETIMEDOUT;+}
+int wait_mask_clr_timeout(void *addr, u32 mask, u32 timeout)
Do you think these would be better as wait_mask_timeout() and wait_zero_timeout()?
+{
unsigned long long end_tick;u32 val;end_tick = usec_to_tick(timeout) + get_ticks();do {val = readl(addr);if (!(val & mask))return 0;} while (end_tick > get_ticks());return -ETIMEDOUT;+}
2.14.1