From: Dejin Zheng <zhengdejin5@gmail.com>
To: broonie@kernel.org
Cc: Markus.Elfring@web.de, linux-kernel@vger.kernel.org,
Dejin Zheng <zhengdejin5@gmail.com>
Subject: [PATCH v2 2/2] regmap: Simplify implementation of the regmap_field_read_poll_timeout() macro
Date: Mon, 20 Apr 2020 21:46:47 +0800 [thread overview]
Message-ID: <20200420134647.9121-3-zhengdejin5@gmail.com> (raw)
In-Reply-To: <20200420134647.9121-1-zhengdejin5@gmail.com>
Simplify the implementation of the macro regmap_field_read_poll_timeout()
by using the macro read_poll_timeout().
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
---
v1 -> v2:
- modify the commit comments by Markus's suggestion .
include/linux/regmap.h | 23 ++++-------------------
1 file changed, 4 insertions(+), 19 deletions(-)
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 299c1f6a03b4..78ddf224f988 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -194,25 +194,10 @@ struct reg_sequence {
*/
#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_field_read((field), &(val)); \
- break; \
- } \
- if (__sleep_us) \
- usleep_range((__sleep_us >> 2) + 1, __sleep_us); \
- } \
- pollret ?: ((cond) ? 0 : -ETIMEDOUT); \
+ int __ret, __tmp; \
+ __tmp = read_poll_timeout(regmap_field_read, __ret, __ret || (cond), \
+ sleep_us, timeout_us, false, (field), &(val)); \
+ __ret ?: __tmp; \
})
#ifdef CONFIG_REGMAP
--
2.25.0
next prev parent reply other threads:[~2020-04-20 13:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-20 13:46 [PATCH v2 0/2] use read_poll_timeout macro to simplify code Dejin Zheng
2020-04-20 13:46 ` [PATCH v2 1/2] regmap: Simplify implementation of the regmap_read_poll_timeout() macro Dejin Zheng
2020-04-20 14:35 ` Markus Elfring
2020-04-20 13:46 ` Dejin Zheng [this message]
2020-04-20 14:47 ` [PATCH v2 0/2] use read_poll_timeout macro to simplify code Mark Brown
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