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And also add Kconfig option for selecting ELDO3 voltage. The reason for having this option is that the Android kernel sets ELDO3 to 1.2V when powering up LCD in the case if 'lcd_if' configuration variable is set to 6 (LCD_IF_EXT_DSI) in the FEX file. Most likely to supply power for a SSD2828 chip. However on the MSI Primo81 tablet, which is using this particular 'lcd_if = 6' setup for LCD, setting the ELDO3 voltage appears to be unnecessary and it works regardless. Having no schematics of this tablet, I can only guess that 1.2V is supplied to SSD2828 in some other way. Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
76 lines
2.3 KiB
Plaintext
76 lines
2.3 KiB
Plaintext
config AXP221_POWER
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boolean "axp221 / axp223 pmic support"
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depends on MACH_SUN6I || MACH_SUN8I
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default y
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---help---
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Say y here to enable support for the axp221 / axp223 pmic found on most
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sun6i (A31) / sun8i (A23) boards.
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config AXP221_DCDC1_VOLT
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int "axp221 dcdc1 voltage"
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depends on AXP221_POWER
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default 3000
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---help---
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Set the voltage (mV) to program the axp221 dcdc1 at, set to 0 to
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disable dcdc1. This is typically used as generic 3.3V IO voltage for
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things like GPIO-s, sdcard interfaces, etc. On most boards this is
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undervolted to 3.0V to safe battery.
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config AXP221_DLDO1_VOLT
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int "axp221 dldo1 voltage"
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depends on AXP221_POWER
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default 0
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---help---
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Set the voltage (mV) to program the axp221 dldo1 at, set to 0 to
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disable dldo1. On sun6i (A31) boards with ethernet this is often used
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to power the ethernet phy. On sun8i (A23) boards this is often used to
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power the wifi.
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config AXP221_DLDO4_VOLT
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int "axp221 dldo4 voltage"
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depends on AXP221_POWER
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default 0
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---help---
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Set the voltage (mV) to program the axp221 dldo4 at, set to 0 to
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disable dldo4.
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config AXP221_ALDO1_VOLT
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int "axp221 aldo1 voltage"
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depends on AXP221_POWER
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default 0
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---help---
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Set the voltage (mV) to program the axp221 aldo1 at, set to 0 to
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disable aldo1. On sun6i (A31) boards which have a wifi module this is
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often used to power the wifi module.
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config AXP221_ALDO2_VOLT
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int "axp221 aldo2 voltage"
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depends on AXP221_POWER
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default 0 if MACH_SUN6I
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default 2500 if MACH_SUN8I
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---help---
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Set the voltage (mV) to program the axp221 aldo2 at, set to 0 to
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disable aldo2. On sun6i (A31) boards this is typically unused and
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should be disabled, if it is used for LPDDR2 it should be set to 1.8V.
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On sun8i (A23) this is typically connected to VDD-DLL and must be set
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to 2.5V.
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config AXP221_ALDO3_VOLT
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int "axp221 aldo3 voltage"
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depends on AXP221_POWER
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default 3000
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---help---
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Set the voltage (mV) to program the axp221 aldo3 at, set to 0 to
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disable aldo3. This is typically connected to VCC-PLL and AVCC and
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must be set to 3V.
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config AXP221_ELDO3_VOLT
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int "axp221 eldo3 voltage"
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depends on AXP221_POWER
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default 0
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---help---
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Set the voltage (mV) to program the axp221 eldo3 at, set to 0 to
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disable eldo3. On some A31(s) tablets it might be used to supply
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1.2V for the SSD2828 chip (converter of parallel LCD interface
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into MIPI DSI).
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