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Merge remote-tracking branch 'regmap/topic/core' into regmap-next

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Mark Brown 2017-11-06 11:39:39 +00:00
commit e7f774c942
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1 changed files with 52 additions and 8 deletions
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60
include/linux/regmap.h
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@ -120,21 +120,65 @@ struct reg_sequence {
*/
#define regmap_read_poll_timeout(map, addr, val, cond, sleep_us, timeout_us) \
({ \
ktime_t timeout = ktime_add_us(ktime_get(), timeout_us); \
int pollret; \
might_sleep_if(sleep_us); \
u64 __timeout_us = (timeout_us); \
unsigned long __sleep_us = (sleep_us); \
ktime_t __timeout = ktime_add_us(ktime_get(), __timeout_us); \
int __ret; \
might_sleep_if(__sleep_us); \
for (;;) { \
pollret = regmap_read((map), (addr), &(val)); \
__ret = regmap_read((map), (addr), &(val)); \
if (__ret) \
break; \
if (cond) \
break; \
if ((__timeout_us) && \
ktime_compare(ktime_get(), __timeout) > 0) { \
__ret = regmap_read((map), (addr), &(val)); \
break; \
} \
if (__sleep_us) \
usleep_range((__sleep_us >> 2) + 1, __sleep_us); \
} \
__ret ?: ((cond) ? 0 : -ETIMEDOUT); \
})
/**
* regmap_field_read_poll_timeout - Poll until a condition is met or timeout
*
* @field: Regmap field to read from
* @val: Unsigned integer variable to read the value into
* @cond: Break condition (usually involving @val)
* @sleep_us: Maximum time to sleep between reads in us (0
* tight-loops). Should be less than ~20ms since usleep_range
* is used (see Documentation/timers/timers-howto.txt).
* @timeout_us: Timeout in us, 0 means never timeout
*
* Returns 0 on success and -ETIMEDOUT upon a timeout or the regmap_field_read
* error return value in case of a error read. In the two former cases,
* the last read value at @addr is stored in @val. Must not be called
* from atomic context if sleep_us or timeout_us are used.
*
* This is modelled after the readx_poll_timeout macros in linux/iopoll.h.
*/
#define regmap_field_read_poll_timeout(field, val, cond, sleep_us, timeout_us) \
({ \
u64 __timeout_us = (timeout_us); \
unsigned long __sleep_us = (sleep_us); \
ktime_t timeout = ktime_add_us(ktime_get(), __timeout_us); \
int pollret; \
might_sleep_if(__sleep_us); \
for (;;) { \
pollret = regmap_field_read((field), &(val)); \
if (pollret) \
break; \
if (cond) \
break; \
if (timeout_us && ktime_compare(ktime_get(), timeout) > 0) { \
pollret = regmap_read((map), (addr), &(val)); \
if (__timeout_us && ktime_compare(ktime_get(), timeout) > 0) { \
pollret = regmap_field_read((field), &(val)); \
break; \
} \
if (sleep_us) \
usleep_range((sleep_us >> 2) + 1, sleep_us); \
if (__sleep_us) \
usleep_range((__sleep_us >> 2) + 1, __sleep_us); \
} \
pollret ?: ((cond) ? 0 : -ETIMEDOUT); \
})