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 <oliver@oli1170.net> Signed-off-by: Paul Parsons <lost.distance@yahoo.com> Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
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@ -97,9 +97,9 @@ static unsigned long hx4700_pin_config[] __initdata = {
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/* BTUART */
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GPIO42_BTUART_RXD,
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GPIO43_BTUART_TXD,
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GPIO43_BTUART_TXD_LPM_LOW,
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GPIO44_BTUART_CTS,
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GPIO45_BTUART_RTS,
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GPIO45_BTUART_RTS_LPM_LOW,
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/* PWM 1 (Backlight) */
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GPIO17_PWM1_OUT,
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@ -158,7 +158,9 @@
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#define GPIO44_BTUART_CTS MFP_CFG_IN(GPIO44, AF1)
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#define GPIO42_BTUART_RXD MFP_CFG_IN(GPIO42, AF1)
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#define GPIO45_BTUART_RTS MFP_CFG_OUT(GPIO45, AF2, DRIVE_HIGH)
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#define GPIO45_BTUART_RTS_LPM_LOW MFP_CFG_OUT(GPIO45, AF2, DRIVE_LOW)
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#define GPIO43_BTUART_TXD MFP_CFG_OUT(GPIO43, AF2, DRIVE_HIGH)
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#define GPIO43_BTUART_TXD_LPM_LOW MFP_CFG_OUT(GPIO43, AF2, DRIVE_LOW)
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/* STUART */
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#define GPIO46_STUART_RXD MFP_CFG_IN(GPIO46, AF2)
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