+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2012-2014 The Linux Foundation. All rights reserved.
- *
- * SPDX-License-Identifier: GPL-2.0
*/
#ifndef _LINUX_IOPOLL_H
#define _LINUX_IOPOLL_H
+#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <time.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)
+ * @sleep_us: Maximum time to sleep in us
* @timeout_us: Timeout in us, 0 means never timeout
*
* Returns 0 on success and -ETIMEDOUT upon a timeout. In either
* When available, you'll probably want to use one of the specialized
* macros defined below rather than this macro directly.
*/
-#define readx_poll_timeout(op, addr, val, cond, timeout_us) \
+#define read_poll_timeout(op, addr, val, cond, sleep_us, timeout_us) \
({ \
unsigned long timeout = timer_get_us() + timeout_us; \
for (;;) { \
(val) = op(addr); \
break; \
} \
+ if (sleep_us) \
+ udelay(sleep_us); \
} \
(cond) ? 0 : -ETIMEDOUT; \
})
+#define readx_poll_sleep_timeout(op, addr, val, cond, sleep_us, timeout_us) \
+ read_poll_timeout(op, addr, val, cond, sleep_us, timeout_us)
+
+#define readl_poll_sleep_timeout(addr, val, cond, sleep_us, timeout_us) \
+ readx_poll_sleep_timeout(readl, addr, val, cond, sleep_us, timeout_us)
+
+#define readx_poll_timeout(op, addr, val, cond, timeout_us) \
+ read_poll_timeout(op, addr, val, cond, false, timeout_us)
#define readb_poll_timeout(addr, val, cond, timeout_us) \
readx_poll_timeout(readb, addr, val, cond, timeout_us)