From cd419cf922bdb50d33c98c9a0c81f51a40609f66 Mon Sep 17 00:00:00 2001 From: Paul Parsons Date: Sun, 11 Mar 2012 13:23:42 +0000 Subject: [PATCH] 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: Oliver Winker Signed-off-by: Paul Parsons Signed-off-by: Haojian Zhuang --- arch/arm/mach-pxa/hx4700.c | 4 ++-- arch/arm/mach-pxa/include/mach/mfp-pxa27x.h | 2 ++ 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-pxa/hx4700.c b/arch/arm/mach-pxa/hx4700.c index c5fb105d2689..f49043cbab10 100644 --- a/arch/arm/mach-pxa/hx4700.c +++ b/arch/arm/mach-pxa/hx4700.c @@ -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, diff --git a/arch/arm/mach-pxa/include/mach/mfp-pxa27x.h b/arch/arm/mach-pxa/include/mach/mfp-pxa27x.h index ec0f0b0b6744..a65867209aa0 100644 --- a/arch/arm/mach-pxa/include/mach/mfp-pxa27x.h +++ b/arch/arm/mach-pxa/include/mach/mfp-pxa27x.h @@ -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) -- 2.39.5