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sunxi: power: add support for sy8106a driver

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SY8106A is a PMIC which is used on the Allwinner
H3 Orange Pi Pc and Plus board. The VOUT1_SEL register is
implemented to set the default V-CPU voltage to 1200 mV.

This driver is required to ensure the SY8106A V-CPU
voltage is set to 1200 mV after a software reset. On cold
boot the default SY8106A output voltage is selected to be
1200 mV by a pair of resistors on the Orange Pi PC and Plus.

Signed-off-by: Jelle van der Waa <jelle@vdwaa.nl>
Tested-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Jelle van der Waa
2016-02-23 18:47:19 +01:00
committed by Hans de Goede
parent 595af9db24
commit 0d8382ae70
9 changed files with 72 additions and 4 deletions
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16
drivers/power/Kconfig
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@@ -48,6 +48,13 @@ config AXP818_POWER
Say y here to enable support for the axp818 pmic found on
A83T dev board.
config SY8106A_POWER
boolean "SY8106A pmic support"
depends on MACH_SUN8I_H3
---help---
Select this to enable support for the SY8106A pmic found on some
H3 boards.
endchoice
config AXP_DCDC1_VOLT
@@ -232,4 +239,13 @@ config AXP_ELDO3_VOLT
1.2V for the SSD2828 chip (converter of parallel LCD interface
into MIPI DSI).
config SY8106A_VOUT1_VOLT
int "SY8106A pmic VOUT1 voltage"
depends on SY8106A_POWER
default 1200
---help---
Set the voltage (mV) to program the SY8106A pmic VOUT1. This
is typically used to power the VDD-CPU and should be 1200mV.
Values can range from 680mV till 1950mV.
endmenu

1
drivers/power/Makefile
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@@ -12,6 +12,7 @@ obj-$(CONFIG_AXP221_POWER) += axp221.o
obj-$(CONFIG_AXP818_POWER) += axp818.o
obj-$(CONFIG_EXYNOS_TMU) += exynos-tmu.o
obj-$(CONFIG_FTPMU010_POWER) += ftpmu010.o
obj-$(CONFIG_SY8106A_POWER) += sy8106a.o
obj-$(CONFIG_TPS6586X_POWER) += tps6586x.o
obj-$(CONFIG_TWL4030_POWER) += twl4030.o
obj-$(CONFIG_TWL6030_POWER) += twl6030.o

29
drivers/power/sy8106a.c Normal file
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@@ -0,0 +1,29 @@
/*
* (C) Copyright 2016
* Jelle van der Waa <jelle@vdwaa.nl>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <i2c.h>
#include <sy8106a.h>
#define SY8106A_I2C_ADDR 0x65
#define SY8106A_VOUT1_SEL 1
#define SY8106A_VOUT1_SEL_ENABLE (1 << 7)
static u8 sy8106a_mvolt_to_cfg(int mvolt, int min, int max, int div)
{
if (mvolt < min)
mvolt = min;
else if (mvolt > max)
mvolt = max;
return (mvolt - min) / div;
}
int sy8106a_set_vout1(unsigned int mvolt)
{
u8 data = sy8106a_mvolt_to_cfg(mvolt, 680, 1950, 10) | SY8106A_VOUT1_SEL_ENABLE;
return i2c_write(SY8106A_I2C_ADDR, SY8106A_VOUT1_SEL, 1, &data, 1);
}