From: Axel Lin <axel.lin@ingics.com>
Date: Thu, 15 Aug 2013 06:18:46 +0000 (+0800)
Subject: spi: altera: Simplify altera_spi_txrx implementation for noirq case
X-Git-Tag: v3.12-rc1~192^2~40
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=72be0ee42ebaf744d4a5cf684ee68dba59d6bac1;p=pandora-kernel.git

spi: altera: Simplify altera_spi_txrx implementation for noirq case

This patch simplifies the code and makes it better in readability.
Now the logic in the while loop is simply
"write to ALTERA_SPI_TXDATA then read from ALTERA_SPI_TXDATA".

There is a slightly logic change because now we avoid a read-write cycle when
hw->len is 0. Since the code in bitbang library will call bitbang->txrx_bufs()
only when t->len is not 0, this is not a problem.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Mark Brown <broonie@linaro.org>
---

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