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[ARM] 4278/1: configure pxa27x I2C SCL as "input"

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It has been reported by Julian Deng that configuring the pxa27x i2c SCL line as output generates a short negative pulse on it during the call to pxa_gpio_mode(GPIO117_I2CSCL_MD); as it first switches it to output and then configures it for the alternate function. The SCL line is in fact bidirectional and can also be configured as 117 | GPIO_ALT_FN_1_IN, in which case the pulse is not generated. This is exactly what this patch does.

Author: Julian Deng <dengtj@sitek.cn>

Signed-off-by: G. Liakhovetski <gl@dsa-ac.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Guennadi Liakhovetski 2007-03-22 13:06:55 +01:00 committed by Russell King
parent b1dfe1f145
commit 53698d2537
1 changed files with 1 additions and 1 deletions
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2
include/asm-arm/arch-pxa/pxa-regs.h
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@ -1476,7 +1476,7 @@
#define GPIO112_MMCCMD_MD (112 | GPIO_ALT_FN_1_OUT)
#define GPIO113_I2S_SYSCLK_MD (113 | GPIO_ALT_FN_1_OUT)
#define GPIO113_AC97_RESET_N_MD (113 | GPIO_ALT_FN_2_OUT)
#define GPIO117_I2CSCL_MD (117 | GPIO_ALT_FN_1_OUT)
#define GPIO117_I2CSCL_MD (117 | GPIO_ALT_FN_1_IN)
#define GPIO118_I2CSDA_MD (118 | GPIO_ALT_FN_1_IN)
/*