SY8106A

gistfile1.txt

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

Signed-off-by: Jelle van der Waa <jelle@vdwaa.nl>
---
 arch/arm/cpu/armv7/sunxi/Makefile |  1 +
 board/sunxi/board.c               |  6 ++++++
 configs/orangepi_pc_defconfig     |  1 +
 drivers/power/Kconfig             | 19 ++++++++++++++++++-
 drivers/power/Makefile            |  1 +
 drivers/power/sy8106a.c           | 22 ++++++++++++++++++++++
 include/configs/sunxi-common.h    |  6 ++++--
 include/sy8106a.h                 |  5 +++++
 8 files changed, 58 insertions(+), 3 deletions(-)
 create mode 100644 drivers/power/sy8106a.c
 create mode 100644 include/sy8106a.h

diff --git a/arch/arm/cpu/armv7/sunxi/Makefile b/arch/arm/cpu/armv7/sunxi/Makefile
index dfb0a3e..dafbb89 100644
--- a/arch/arm/cpu/armv7/sunxi/Makefile
+++ b/arch/arm/cpu/armv7/sunxi/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_AXP152_POWER)    += pmic_bus.o
 obj-$(CONFIG_AXP209_POWER)     += pmic_bus.o
 obj-$(CONFIG_AXP221_POWER)     += pmic_bus.o
 obj-$(CONFIG_AXP818_POWER)     += pmic_bus.o
+obj-$(CONFIG_SY8106A_POWER)    += pmic_bus.o

 ifndef CONFIG_SPL_BUILD
 ifdef CONFIG_ARMV7_PSCI
diff --git a/board/sunxi/board.c b/board/sunxi/board.c
index 1cc39e4..f26fc6d 100644
--- a/board/sunxi/board.c
+++ b/board/sunxi/board.c
@@ -25,6 +25,8 @@
 #include <asm/io.h>
 #include <nand.h>
 #include <net.h>
+#include <i2c.h>
+#include <sy8106a.h>

 #if defined CONFIG_VIDEO_LCD_PANEL_I2C && !(defined CONFIG_SPL_BUILD)
 /* So that we can use pin names in Kconfig and sunxi_name_to_gpio() */
@@ -430,11 +432,15 @@ void i2c_init_board(void)
 #endif
 }

+
 #ifdef CONFIG_SPL_BUILD
 void sunxi_board_init(void)
 {
        int power_failed = 0;
        unsigned long ramsize;
+#ifdef CONFIG_SY8106A_POWER
+       power_failed = sy8106a_set_vout1(CONFIG_SY8106A_VOUT1_VOLT);
+#endif

 #if defined CONFIG_AXP152_POWER || defined CONFIG_AXP209_POWER || \
        defined CONFIG_AXP221_POWER || defined CONFIG_AXP818_POWER
diff --git a/configs/orangepi_pc_defconfig b/configs/orangepi_pc_defconfig
index ea9ed87..0bd1d6f 100644
--- a/configs/orangepi_pc_defconfig
+++ b/configs/orangepi_pc_defconfig
@@ -13,3 +13,4 @@ CONFIG_SPL=y
 # CONFIG_CMD_FPGA is not set
 CONFIG_CMD_GPIO=y
 CONFIG_R_I2C_ENABLE=y
+CONFIG_SY8106A_POWER=y
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index e86dd72..9e1d7b6 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -10,7 +10,7 @@ choice
        default AXP209_POWER if MACH_SUN4I || MACH_SUN5I || MACH_SUN7I
        default AXP221_POWER if MACH_SUN6I || MACH_SUN8I_A23 || MACH_SUN8I_A33
        default AXP818_POWER if MACH_SUN8I_A83T
-       default SUNXI_NO_PMIC if MACH_SUN8I_H3
+       default SY8106A_POWER if MACH_SUN8I_H3

 config SUNXI_NO_PMIC
        boolean "board without a pmic"
@@ -45,6 +45,14 @@ 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
+       default 0
+       ---help---
+       Select this to enable support for the SY8106A pmic found on most
+       H3 boards.
+
 endchoice

 config AXP_DCDC1_VOLT
@@ -222,4 +230,13 @@ 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
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 0fdbca3..7385bcd 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -21,3 +21,4 @@ obj-$(CONFIG_DIALOG_POWER) += power_dialog.o
 obj-$(CONFIG_POWER_FSL) += power_fsl.o
 obj-$(CONFIG_POWER_I2C) += power_i2c.o
 obj-$(CONFIG_POWER_SPI) += power_spi.o
+obj-$(CONFIG_SY8106A_POWER) += sy8106a.o
diff --git a/drivers/power/sy8106a.c b/drivers/power/sy8106a.c
new file mode 100644
index 0000000..fb6ee7c
--- /dev/null
+++ b/drivers/power/sy8106a.c
@@ -0,0 +1,22 @@
+#include <common.h>
+#include <i2c.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);
+}
diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h
index b4dfb3c..40850e5 100644
--- a/include/configs/sunxi-common.h
+++ b/include/configs/sunxi-common.h
@@ -206,7 +206,8 @@
 #define CONFIG_SPL_STACK               LOW_LEVEL_SRAM_STACK

 /* I2C */
-#if defined CONFIG_AXP152_POWER || defined CONFIG_AXP209_POWER
+#if defined CONFIG_AXP152_POWER || defined CONFIG_AXP209_POWER || \
+    defined CONFIG_SY8106A_POWER
 #define CONFIG_SPL_I2C_SUPPORT
 #endif

@@ -240,7 +241,8 @@ extern int soft_i2c_gpio_scl;

 /* PMU */
 #if defined CONFIG_AXP152_POWER || defined CONFIG_AXP209_POWER || \
-    defined CONFIG_AXP221_POWER || defined CONFIG_AXP818_POWER
+    defined CONFIG_AXP221_POWER || defined CONFIG_AXP818_POWER || \
+    defined CONFIG_SY8106A_POWER
 #define CONFIG_SPL_POWER_SUPPORT
 #endif

diff --git a/include/sy8106a.h b/include/sy8106a.h
new file mode 100644
index 0000000..714c314
--- /dev/null
+++ b/include/sy8106a.h
@@ -0,0 +1,5 @@
+#ifndef _SY8106A_PMIC_H_
+
+int sy8106a_set_vout1(unsigned int mvolt);
+
+#endif