e1000: Add a "poll register" function
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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@ -2144,5 +2144,9 @@ int32_t e1000_read_eeprom(struct e1000_hw *hw, uint16_t offset,
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int32_t e1000_swfw_sync_acquire(struct e1000_hw *hw, uint16_t mask);
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int32_t e1000_swfw_sync_release(struct e1000_hw *hw, uint16_t mask);
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int e1000_poll_reg(struct e1000_hw *hw, uint32_t reg,
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uint32_t mask, uint32_t value,
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uint64_t timeout);
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#endif /* _E1000_HW_H_ */
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@ -52,3 +52,19 @@ void e1000_write_flush(struct e1000_hw *hw)
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{
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e1000_read_reg(hw, E1000_STATUS);
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}
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int e1000_poll_reg(struct e1000_hw *hw, uint32_t reg, uint32_t mask,
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uint32_t value, uint64_t timeout)
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{
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const uint64_t start = get_time_ns();
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do {
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const uint32_t v = e1000_read_reg(hw, reg);
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if ((v & mask) == value)
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return 0;
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} while (!is_timeout(start, timeout));
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return -ETIMEDOUT;
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}
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