sunxi: power: add support for sy8106a driver
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>
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 10683a2..adc6455 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -48,6 +48,13 @@
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 @@
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
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 0fdbca3..690faa0 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -12,6 +12,7 @@
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
diff --git a/drivers/power/sy8106a.c b/drivers/power/sy8106a.c
new file mode 100644
index 0000000..bbf116f
--- /dev/null
+++ b/drivers/power/sy8106a.c
@@ -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);
+}