Signed-off-by: Andrey Smirnov <[email protected]>
---
drivers/net/e1000/e1000.h | 4 ++++
drivers/net/e1000/regio.c | 16 ++++++++++++++++
2 files changed, 20 insertions(+)
diff --git a/drivers/net/e1000/e1000.h b/drivers/net/e1000/e1000.h
index c6d26d5..cb3e5ef 100644
--- a/drivers/net/e1000/e1000.h
+++ b/drivers/net/e1000/e1000.h
@@ -2144,5 +2144,9 @@ int32_t e1000_read_eeprom(struct e1000_hw *hw, uint16_t
offset,
int32_t e1000_swfw_sync_acquire(struct e1000_hw *hw, uint16_t mask);
int32_t e1000_swfw_sync_release(struct e1000_hw *hw, uint16_t mask);
+int e1000_poll_reg(struct e1000_hw *hw, uint32_t reg,
+ uint32_t mask, uint32_t value,
+ uint64_t timeout);
+
#endif /* _E1000_HW_H_ */
diff --git a/drivers/net/e1000/regio.c b/drivers/net/e1000/regio.c
index 4970084..b2e9d7b 100644
--- a/drivers/net/e1000/regio.c
+++ b/drivers/net/e1000/regio.c
@@ -52,3 +52,19 @@ void e1000_write_flush(struct e1000_hw *hw)
{
e1000_read_reg(hw, E1000_STATUS);
}
+
+int e1000_poll_reg(struct e1000_hw *hw, uint32_t reg, uint32_t mask,
+ uint32_t value, uint64_t timeout)
+{
+ const uint64_t start = get_time_ns();
+
+ do {
+ const uint32_t v = e1000_read_reg(hw, reg);
+
+ if ((v & mask) == value)
+ return 0;
+
+ } while (!is_timeout(start, timeout));
+
+ return -ETIMEDOUT;
+}
--
2.5.5
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