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ARM: pxa/hx4700: Reduce sleep mode battery discharge by 35%

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Drive the two Bluetooth UART output GPIOs (GPIO43_BTUART_TXD, GPIO45_BTUART_RTS)
LOW during sleep mode instead of HIGH. This reduces sleep mode battery discharge
from approximately 46 mA to approximately 30 mA.

Signed-off-by: Oliver Winker <oliver@oli1170.net>
Signed-off-by: Paul Parsons <lost.distance@yahoo.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
This commit is contained in:
Paul Parsons 2012-03-11 13:23:42 +00:00 committed by Haojian Zhuang
parent 95a50cab1d
commit cd419cf922
2 changed files with 4 additions and 2 deletions
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4
arch/arm/mach-pxa/hx4700.c
View File

@ -97,9 +97,9 @@ static unsigned long hx4700_pin_config[] __initdata = {
/* BTUART */
GPIO42_BTUART_RXD,
GPIO43_BTUART_TXD,
GPIO43_BTUART_TXD_LPM_LOW,
GPIO44_BTUART_CTS,
GPIO45_BTUART_RTS,
GPIO45_BTUART_RTS_LPM_LOW,
/* PWM 1 (Backlight) */
GPIO17_PWM1_OUT,

2
arch/arm/mach-pxa/include/mach/mfp-pxa27x.h
View File

@ -158,7 +158,9 @@
#define GPIO44_BTUART_CTS MFP_CFG_IN(GPIO44, AF1)
#define GPIO42_BTUART_RXD MFP_CFG_IN(GPIO42, AF1)
#define GPIO45_BTUART_RTS MFP_CFG_OUT(GPIO45, AF2, DRIVE_HIGH)
#define GPIO45_BTUART_RTS_LPM_LOW MFP_CFG_OUT(GPIO45, AF2, DRIVE_LOW)
#define GPIO43_BTUART_TXD MFP_CFG_OUT(GPIO43, AF2, DRIVE_HIGH)
#define GPIO43_BTUART_TXD_LPM_LOW MFP_CFG_OUT(GPIO43, AF2, DRIVE_LOW)
/* STUART */
#define GPIO46_STUART_RXD MFP_CFG_IN(GPIO46, AF2)