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authorLinus Walleij <linus.walleij@stericsson.com>2009-08-15 15:12:05 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-09-18 22:09:02 +0100
commitee2b805c8eb6459cf541ef141ff70dae17af59ca (patch)
treeca1e0f1988e71f2285ca336d88c5da2c5efa8c71 /include/linux/amba
parenta2ca00ea9398265a26eabb358bba83c8b75c463d (diff)
downloadblackbird-op-linux-ee2b805c8eb6459cf541ef141ff70dae17af59ca.tar.gz
blackbird-op-linux-ee2b805c8eb6459cf541ef141ff70dae17af59ca.zip
ARM: 5678/1: SSP/SPI PL022 polarity terminology fix
The definition of the SPI clock phase for the Motorola mode of the PL022 driver was incorrect: the spec had been interpreted as data being recieved on rising or falling edge of the clocks while the correct interpretation is that data can be recieved on the first or second edge transition, falling or rising depending on the polarity setting. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include/linux/amba')
-rw-r--r--include/linux/amba/pl022.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/amba/pl022.h b/include/linux/amba/pl022.h
index dcad0ffd1755..e4836c6b3dd7 100644
--- a/include/linux/amba/pl022.h
+++ b/include/linux/amba/pl022.h
@@ -136,12 +136,12 @@ enum ssp_tx_level_trig {
/**
* enum SPI Clock Phase - clock phase (Motorola SPI interface only)
- * @SSP_CLK_RISING_EDGE: Receive data on rising edge
- * @SSP_CLK_FALLING_EDGE: Receive data on falling edge
+ * @SSP_CLK_FIRST_EDGE: Receive data on first edge transition (actual direction depends on polarity)
+ * @SSP_CLK_SECOND_EDGE: Receive data on second edge transition (actual direction depends on polarity)
*/
enum ssp_spi_clk_phase {
- SSP_CLK_RISING_EDGE,
- SSP_CLK_FALLING_EDGE
+ SSP_CLK_FIRST_EDGE,
+ SSP_CLK_SECOND_EDGE
};
/**
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