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Subject[PATCH v4 0/5] i2c:ocores: improvements
This patch set provides improvements to the i2c-ocore driver.

[V3 -> V4]
- add reviews-by/tested-by
- add comment to justify the formula in
udelay((8 * 1000) / i2c->bus_clock_khz);

[V2 -> V3]
- fix particular error condition on platform_get_irq(). Copied from

[V1 -> V2]
- replaced usleep_range() with udelay() so that the polling version can be
used in atomic context.
- added dedicated patch for minor style issues
- fixed delay computation
- use spin_lock_irqsave(), instead of spin_trylock_irqsave(). IACK is always
necessary and a trylock would generate an extra interrupt for nothing
- make the driver ready for an eventual master_xfer_irqless()

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