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Commit cd419cf9 authored by Paul Parsons's avatar Paul Parsons Committed by Haojian Zhuang
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ARM: pxa/hx4700: Reduce sleep mode battery discharge by 35% 



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: default avatarOliver Winker <oliver@oli1170.net>
Signed-off-by: default avatarPaul Parsons <lost.distance@yahoo.com>
Signed-off-by: default avatarHaojian Zhuang <haojian.zhuang@gmail.com>
parent 95a50cab

arch/arm/mach-pxa/hx4700.c

+2 −2
Original line number Diff line number Diff line
@@ -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,

arch/arm/mach-pxa/include/mach/mfp-pxa27x.h

+2 −0
Original line number Diff line number Diff line
@@ -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)