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author | Sascha Hauer <s.hauer@pengutronix.de> | 2020-05-14 07:11:20 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2020-05-14 07:11:20 +0200 |
commit | 9b01acf90f04aaf3f6f41875e91272cbeac51171 (patch) | |
tree | e0a8f1d096d3b8967961386a98cf08f28f494998 /include/linux | |
parent | 6e68393fb17254850b9bfc8e268569a05111c29c (diff) | |
parent | b1dd1585deb21db5b595549267219ff9364dd4c8 (diff) | |
download | barebox-9b01acf90f04aaf3f6f41875e91272cbeac51171.tar.gz barebox-9b01acf90f04aaf3f6f41875e91272cbeac51171.tar.xz |
Merge branch 'for-next/powerpc'
Diffstat (limited to 'include/linux')
-rw-r--r-- | include/linux/iopoll.h | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/include/linux/iopoll.h b/include/linux/iopoll.h index 66c8f652ca..8bf912e173 100644 --- a/include/linux/iopoll.h +++ b/include/linux/iopoll.h @@ -13,12 +13,12 @@ #include <pbl.h> /** - * readx_poll_timeout - Periodically poll an address until a condition is met or a timeout occurs + * read_poll_timeout - Periodically poll an address until a condition is met or a timeout occurs * @op: accessor function (takes @addr as its only argument) - * @addr: Address to poll * @val: Variable to read the value into * @cond: Break condition (usually involving @val) * @timeout_us: Timeout in us, 0 means never timeout + * @args: arguments for @op poll * * Returns 0 on success and -ETIMEDOUT upon a timeout. In either * case, the last read value at @addr is stored in @val. @@ -29,24 +29,43 @@ * We do not have timing functions in the PBL, so ignore the timeout value and * loop infinitely here. */ -#define readx_poll_timeout(op, addr, val, cond, timeout_us) \ +#define read_poll_timeout(op, val, cond, timeout_us, args...) \ ({ \ uint64_t start; \ if (!IN_PBL && timeout_us) \ start = get_time_ns(); \ for (;;) { \ - (val) = op(addr); \ + (val) = op(args); \ if (cond) \ break; \ if (!IN_PBL && timeout_us && \ is_timeout(start, ((timeout_us) * USECOND))) { \ - (val) = op(addr); \ + (val) = op(args); \ break; \ } \ } \ (cond) ? 0 : -ETIMEDOUT; \ }) +/** + * readx_poll_timeout - Periodically poll an address until a condition is met or a timeout occurs + * @op: accessor function (takes @addr as its only argument) + * @addr: Address to poll + * @val: Variable to read the value into + * @cond: Break condition (usually involving @val) + * @timeout_us: Timeout in us, 0 means never timeout + * + * Returns 0 on success and -ETIMEDOUT upon a timeout. In either + * case, the last read value at @addr is stored in @val. + * + * When available, you'll probably want to use one of the specialized + * macros defined below rather than this macro directly. + * + * We do not have timing functions in the PBL, so ignore the timeout value and + * loop infinitely here. + */ +#define readx_poll_timeout(op, addr, val, cond, timeout_us) \ + read_poll_timeout(op, val, cond, timeout_us, addr) #define readb_poll_timeout(addr, val, cond, timeout_us) \ readx_poll_timeout(readb, addr, val, cond, timeout_us) |