[PATCH v4 2/2] serial/amba-pl011: Refactor and simplify TX FIFO handling
From: Dave.Martin@arm.com (Dave Martin)
Date: 2015-03-30 16:07:44
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linux-serial
On Mon, Mar 30, 2015 at 04:26:52PM +0200, Jakub Kicinski wrote:
On Mon, 30 Mar 2015 13:28:40 +0100, Dave Martin wrote:
[...]
quoted
TXIS reflects the live status of the FIFO, except that it is "spuriously" deasserted betweem reset/clear of the interrupt and the first TX IRQ, even though the FIFO may be empty.I missed that IRQ is cleared by writing data.
No worries, it took me a fair while to be sure of that myself. The TRM is not very clear on it. Thanks for the careful review. Cheers ---Dave