sunxi: support the AXP809 PMIC (for A80 platforms)

Implement support for the AXP809 PMIC that is used on A80 platforms
as the primary PMIC and powers most peripherals and the CPUA (Cortex-A7)
cluster.  A AXP806 is usually the slave PMIC, which will provide the
power for the CPUB (Cortex-A15) cluster.

The default voltage settings have been chosen to be safe values for a
Optimus, Cubieboard and A80-Q7.  These changes are validated against the
A80-Q7 module.

3 files changed, 331 insertions, 17 deletions

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index adc64552e7..d17e2bd698 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -10,6 +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 AXP809_POWER if MACH_SUN9I
 	default SUNXI_NO_PMIC if MACH_SUN8I_H3
 
 config SUNXI_NO_PMIC
@@ -41,6 +42,14 @@ config AXP221_POWER
 	Select this to enable support for the axp221/axp223 pmic found on most
 	A23 and A31 boards.
 
+config AXP809_POWER
+       boolean "axp809 pmic support"
+       depends on MACH_SUN9I
+       select CMD_POWEROFF
+       ---help---
+       Select this to enable support for the axp809 pmic found on most A80
+       boards.
+
 config AXP818_POWER
 	boolean "axp818 pmic support"
 	depends on MACH_SUN8I_A83T
@@ -59,9 +68,10 @@ endchoice
 
 config AXP_DCDC1_VOLT
 	int "axp pmic dcdc1 voltage"
-	depends on AXP221_POWER || AXP818_POWER
+	depends on AXP221_POWER || AXP818_POWER || AXP809_POWER
 	default 3300 if AXP818_POWER
 	default 3000 if MACH_SUN6I || MACH_SUN8I
+	default 3300 if MACH_SUN9I
 	---help---
 	Set the voltage (mV) to program the axp pmic dcdc1 at, set to 0 to
 	disable dcdc1. On A23 / A31 / A33 (axp221) boards dcdc1 is used for
@@ -69,14 +79,17 @@ config AXP_DCDC1_VOLT
 	sdcard interfaces, etc. On most boards dcdc1 is undervolted to 3.0V to
 	safe battery. On A31 devices dcdc1 is also used for VCC-IO. On A83T
 	dcdc1 is used for VCC-IO, nand, usb0, sd , etc.
+	On the A80-Q7, dcdc1 is used for peripherals (e.g. GbE PHY) and IO and
+        should be set to 3.3V to ensure compliance with the Qseven specification.
 
 config AXP_DCDC2_VOLT
 	int "axp pmic dcdc2 voltage"
-	depends on AXP152_POWER || AXP209_POWER || AXP221_POWER || AXP818_POWER
+	depends on AXP152_POWER || AXP209_POWER || AXP221_POWER || AXP818_POWER || AXP809_POWER
 	default 900 if AXP818_POWER
 	default 1400 if AXP152_POWER || AXP209_POWER
 	default 1200 if MACH_SUN6I
 	default 1100 if MACH_SUN8I
+	default 0 if MACH_SUN9I
 	---help---
 	Set the voltage (mV) to program the axp pmic dcdc2 at, set to 0 to
 	disable dcdc2.
@@ -84,14 +97,17 @@ config AXP_DCDC2_VOLT
 	On A31 boards dcdc2 is used for VDD-GPU and should be 1.2V.
 	On A23/A33 boards dcdc2 is used for VDD-SYS and should be 1.1V.
 	On A83T boards dcdc2 is used for VDD-CPUA(cluster 0) and should be 0.9V.
+	On A80 boards dcdc2 is used for VDD-GPU and should be 0.9V (we turn it
+        off in U-Boot, as the kernel can turn it on later on, if necessary).
 
 config AXP_DCDC3_VOLT
 	int "axp pmic dcdc3 voltage"
-	depends on AXP152_POWER || AXP209_POWER || AXP221_POWER || AXP818_POWER
+	depends on AXP152_POWER || AXP209_POWER || AXP221_POWER || AXP818_POWER || AXP809_POWER
 	default 900 if AXP818_POWER
 	default 1500 if AXP152_POWER
 	default 1250 if AXP209_POWER
 	default 1200 if MACH_SUN6I || MACH_SUN8I
+	default 900 if MACH_SUN9I
 	---help---
 	Set the voltage (mV) to program the axp pmic dcdc3 at, set to 0 to
 	disable dcdc3.
@@ -100,13 +116,15 @@ config AXP_DCDC3_VOLT
 	On A10s boards with an axp152 dcdc3 is VCC-DRAM and should be 1.5V.
 	On A23 / A31 / A33 boards dcdc3 is VDD-CPU and should be 1.2V.
 	On A83T boards dcdc3 is used for VDD-CPUB(cluster 1) and should be 0.9V.
+	On A80 boards dcdc2 is used for VDD-CPUA(Cortex-A7) and should be 0.9V.
 
 config AXP_DCDC4_VOLT
 	int "axp pmic dcdc4 voltage"
-	depends on AXP152_POWER || AXP221_POWER || AXP818_POWER
+	depends on AXP152_POWER || AXP221_POWER || AXP818_POWER || AXP809_POWER
 	default 1250 if AXP152_POWER
 	default 1200 if MACH_SUN6I
 	default 0 if MACH_SUN8I
+	default 900 if MACH_SUN9I
 	---help---
 	Set the voltage (mV) to program the axp pmic dcdc4 at, set to 0 to
 	disable dcdc4.
@@ -114,24 +132,35 @@ config AXP_DCDC4_VOLT
 	On A31 boards dcdc4 is used for VDD-SYS and should be 1.2V.
 	On A23 / A33 boards dcdc4 is unused and should be disabled.
 	On A83T boards dcdc4 is used for VDD-GPU.
+	On A80 boards dcdc4 is used for VDD-SYS and should be 0.9V.
 
 config AXP_DCDC5_VOLT
 	int "axp pmic dcdc5 voltage"
-	depends on AXP221_POWER || AXP818_POWER
+	depends on AXP221_POWER || AXP818_POWER || AXP809_POWER
 	default 1800 if AXP818_POWER
-	default 1500 if MACH_SUN6I || MACH_SUN8I
+	default 1500 if MACH_SUN6I || MACH_SUN8I || MACH_SUN9I
 	---help---
 	Set the voltage (mV) to program the axp pmic dcdc5 at, set to 0 to
 	disable dcdc5.
-	On A23 / A31 / A33 / A83T boards dcdc5 is VCC-DRAM and should be 1.5V,
-	1.8V for A83T.
+	On A23 / A31 / A33 / A83T / A80 boards dcdc5 is VCC-DRAM and should
+	be 1.5V, 1.8V for A83T.
+
+config AXP_DC5LDO_VOLT
+       int "axp pmic dc5ldo voltage"
+       depends on AXP809_POWER
+       default 900 if MACH_SUN9I
+       ---help---
+       Set the voltage (mV) to program the axp pmic dc5ldo at, set to 0 to
+       disable dc5ldo.
+       On A80 boards dc5ldo is VDD-CPUS and should be 0.9V.
 
 config AXP_ALDO1_VOLT
 	int "axp pmic (a)ldo1 voltage"
-	depends on AXP221_POWER || AXP818_POWER
+	depends on AXP221_POWER || AXP818_POWER || AXP809_POWER
 	default 0 if MACH_SUN6I
 	default 1800 if MACH_SUN8I_A83T
 	default 3000 if MACH_SUN8I
+	default 3300 if MACH_SUN9I
 	---help---
 	Set the voltage (mV) to program the axp pmic aldo1 at, set to 0 to
 	disable aldo1.
@@ -139,14 +168,16 @@ config AXP_ALDO1_VOLT
 	On A23 / A33 boards aldo1 is used for VCC-IO and should be 3.0V.
 	On A83T / H8 boards aldo1 is used for MIPI CSI, DSI, HDMI, EFUSE, and
 	should be 1.8V.
+	On A80 boards aldo1 is used for VCC-USBH and should be 3.3V.
 
 config AXP_ALDO2_VOLT
 	int "axp pmic (a)ldo2 voltage"
-	depends on AXP152_POWER || AXP209_POWER || AXP221_POWER || AXP818_POWER
+	depends on AXP152_POWER || AXP209_POWER || AXP221_POWER || AXP818_POWER || AXP809_POWER
 	default 3000 if AXP152_POWER || AXP209_POWER
 	default 0 if MACH_SUN6I
 	default 1800 if MACH_SUN8I_A83T
 	default 2500 if MACH_SUN8I
+	default 0 if MACH_SUN9I
 	---help---
 	Set the voltage (mV) to program the axp pmic aldo2 at, set to 0 to
 	disable aldo2.
@@ -159,9 +190,10 @@ config AXP_ALDO2_VOLT
 
 config AXP_ALDO3_VOLT
 	int "axp pmic (a)ldo3 voltage"
-	depends on AXP209_POWER || AXP221_POWER || AXP818_POWER
+	depends on AXP209_POWER || AXP221_POWER || AXP818_POWER || AXP809_POWER
 	default 0 if AXP209_POWER
 	default 3000 if MACH_SUN6I || MACH_SUN8I
+	default 0 if MACH_SUN9I
 	---help---
 	Set the voltage (mV) to program the axp pmic aldo3 at, set to 0 to
 	disable aldo3.
@@ -181,7 +213,7 @@ config AXP_ALDO4_VOLT
 
 config AXP_DLDO1_VOLT
 	int "axp pmic dldo1 voltage"
-	depends on AXP221_POWER || AXP818_POWER
+	depends on AXP221_POWER || AXP818_POWER || AXP809_POWER
 	default 0
 	---help---
 	Set the voltage (mV) to program the axp pmic dldo1 at, set to 0 to
@@ -191,7 +223,7 @@ config AXP_DLDO1_VOLT
 
 config AXP_DLDO2_VOLT
 	int "axp pmic dldo2 voltage"
-	depends on AXP221_POWER || AXP818_POWER
+	depends on AXP221_POWER || AXP818_POWER || AXP809_POWER
 	default 0
 	---help---
 	Set the voltage (mV) to program the axp pmic dldo2 at, set to 0 to
@@ -215,7 +247,7 @@ config AXP_DLDO4_VOLT
 
 config AXP_ELDO1_VOLT
 	int "axp pmic eldo1 voltage"
-	depends on AXP221_POWER || AXP818_POWER
+	depends on AXP221_POWER || AXP818_POWER || AXP809_POWER
 	default 0
 	---help---
 	Set the voltage (mV) to program the axp pmic eldo1 at, set to 0 to
@@ -223,7 +255,7 @@ config AXP_ELDO1_VOLT
 
 config AXP_ELDO2_VOLT
 	int "axp pmic eldo2 voltage"
-	depends on AXP221_POWER || AXP818_POWER
+	depends on AXP221_POWER || AXP818_POWER || AXP809_POWER
 	default 0
 	---help---
 	Set the voltage (mV) to program the axp pmic eldo2 at, set to 0 to
@@ -231,13 +263,16 @@ config AXP_ELDO2_VOLT
 
 config AXP_ELDO3_VOLT
 	int "axp pmic eldo3 voltage"
-	depends on AXP221_POWER || AXP818_POWER
-	default 0
+	depends on AXP221_POWER || AXP818_POWER || AXP809_POWER
+	default 0 if !MACH_SUN9I
+	default 1800 if MACH_SUN9I
 	---help---
 	Set the voltage (mV) to program the axp pmic eldo3 at, set to 0 to
 	disable eldo3. On some A31(s) tablets it might be used to supply
 	1.2V for the SSD2828 chip (converter of parallel LCD interface
 	into MIPI DSI).
+	On the A80-Q7 (and other A80 boards) it supplies the CPUS IO pins
+	and should be 1.8V.
 
 config SY8106A_VOUT1_VOLT
 	int "SY8106A pmic VOUT1 voltage"
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 690faa0f5e..b43523e628 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_AS3722_POWER)	+= as3722.o
 obj-$(CONFIG_AXP152_POWER)	+= axp152.o
 obj-$(CONFIG_AXP209_POWER)	+= axp209.o
 obj-$(CONFIG_AXP221_POWER)	+= axp221.o
+obj-$(CONFIG_AXP809_POWER)	+= axp809.o
 obj-$(CONFIG_AXP818_POWER)	+= axp818.o
 obj-$(CONFIG_EXYNOS_TMU)	+= exynos-tmu.o
 obj-$(CONFIG_FTPMU010_POWER)	+= ftpmu010.o
diff --git a/drivers/power/axp809.c b/drivers/power/axp809.c
new file mode 100644
index 0000000000..48249de411
--- /dev/null
+++ b/drivers/power/axp809.c
@@ -0,0 +1,278 @@
+/*
+ * AXP809 driver
+ *
+ * (C) Copyright 2016 Theobroma Systems Design und Consulting GmbH
+ *                    Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
+ *
+ * based on AXP221/AXP223 driver (axp221.c):
+ *
+ * (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com>
+ * (C) Copyright 2013 Oliver Schinagl <oliver@schinagl.nl>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <errno.h>
+#include <asm/arch/pmic_bus.h>
+#include <axp_pmic.h>
+
+static u8 axp809_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 axp_set_dc5ldo(unsigned int mvolt)
+{
+	int ret;
+	u8 cfg = axp809_mvolt_to_cfg(mvolt, 700, 1400, 100);
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL1,
+					AXP809_OUTPUT_CTRL1_DC5LDO_EN);
+
+	ret = pmic_bus_write(AXP809_DC5LDO_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL1,
+				AXP809_OUTPUT_CTRL1_DC5LDO_EN);
+}
+
+int axp_set_dcdc1(unsigned int mvolt)
+{
+	int ret;
+	u8 cfg = axp809_mvolt_to_cfg(mvolt, 1600, 3400, 100);
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL1,
+					AXP809_OUTPUT_CTRL1_DCDC1_EN);
+
+	ret = pmic_bus_write(AXP809_DCDC1_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	ret = pmic_bus_setbits(AXP809_OUTPUT_CTRL2,
+			       AXP809_OUTPUT_CTRL2_DC1SW_EN);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL1,
+				AXP809_OUTPUT_CTRL1_DCDC1_EN);
+}
+
+int axp_set_dcdc2(unsigned int mvolt)
+{
+	int ret;
+	u8 cfg = axp809_mvolt_to_cfg(mvolt, 600, 1540, 20);
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL1,
+					AXP809_OUTPUT_CTRL1_DCDC2_EN);
+
+	ret = pmic_bus_write(AXP809_DCDC2_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL1,
+				AXP809_OUTPUT_CTRL1_DCDC2_EN);
+}
+
+int axp_set_dcdc3(unsigned int mvolt)
+{
+	int ret;
+	u8 cfg = axp809_mvolt_to_cfg(mvolt, 600, 1860, 20);
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL1,
+					AXP809_OUTPUT_CTRL1_DCDC3_EN);
+
+	ret = pmic_bus_write(AXP809_DCDC3_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL1,
+				AXP809_OUTPUT_CTRL1_DCDC3_EN);
+}
+
+int axp_set_dcdc4(unsigned int mvolt)
+{
+	int ret;
+        u8  cfg;
+
+	/* DCDC4 has two separate ramps:
+	      20mV steps for  600mV ... 1540mV
+	     100mV steps for 1800mV ... 2600mV
+	 */
+	cfg  = axp809_mvolt_to_cfg(mvolt,  600, 1540,  20);
+	cfg += axp809_mvolt_to_cfg(mvolt, 1800, 2600, 100);
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL1,
+					AXP809_OUTPUT_CTRL1_DCDC4_EN);
+
+	ret = pmic_bus_write(AXP809_DCDC4_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL1,
+				AXP809_OUTPUT_CTRL1_DCDC4_EN);
+}
+
+int axp_set_dcdc5(unsigned int mvolt)
+{
+	int ret;
+	u8 cfg = axp809_mvolt_to_cfg(mvolt, 1000, 2550, 50);
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL1,
+					AXP809_OUTPUT_CTRL1_DCDC5_EN);
+
+	ret = pmic_bus_write(AXP809_DCDC5_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL1,
+				AXP809_OUTPUT_CTRL1_DCDC5_EN);
+}
+
+int axp_set_aldo1(unsigned int mvolt)
+{
+	int ret;
+	u8 cfg = axp809_mvolt_to_cfg(mvolt, 700, 3300, 100);
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL1,
+					AXP809_OUTPUT_CTRL1_ALDO1_EN);
+
+	ret = pmic_bus_write(AXP809_ALDO1_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL1,
+				AXP809_OUTPUT_CTRL1_ALDO1_EN);
+}
+
+int axp_set_aldo2(unsigned int mvolt)
+{
+	int ret;
+	u8 cfg = axp809_mvolt_to_cfg(mvolt, 700, 3300, 100);
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL1,
+					AXP809_OUTPUT_CTRL1_ALDO2_EN);
+
+	ret = pmic_bus_write(AXP809_ALDO2_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL1,
+				AXP809_OUTPUT_CTRL1_ALDO2_EN);
+}
+
+int axp_set_aldo3(unsigned int mvolt)
+{
+	int ret;
+	u8 cfg = axp809_mvolt_to_cfg(mvolt, 700, 3300, 100);
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL2,
+					AXP809_OUTPUT_CTRL2_ALDO3_EN);
+
+	ret = pmic_bus_write(AXP809_ALDO3_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL2,
+				AXP809_OUTPUT_CTRL2_ALDO3_EN);
+}
+
+int axp_set_dldo(int dldo_num, unsigned int mvolt)
+{
+	u8 cfg = axp809_mvolt_to_cfg(mvolt, 700, 3300, 100);
+	int ret;
+
+	if (dldo_num < 1 || dldo_num > 2)
+		return -EINVAL;
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL2,
+				AXP809_OUTPUT_CTRL2_DLDO1_EN << (dldo_num - 1));
+
+	ret = pmic_bus_write(AXP809_DLDO1_CTRL + (dldo_num - 1), cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL2,
+				AXP809_OUTPUT_CTRL2_DLDO1_EN << (dldo_num - 1));
+}
+
+int axp_set_eldo(int eldo_num, unsigned int mvolt)
+{
+	int ret;
+	u8 cfg = axp809_mvolt_to_cfg(mvolt, 700, 3300, 100);
+	u8 addr, bits;
+
+	switch (eldo_num) {
+	case 3:
+		addr = AXP809_ELDO3_CTRL;
+		bits = AXP809_OUTPUT_CTRL2_ELDO3_EN;
+		break;
+	case 2:
+		addr = AXP809_ELDO2_CTRL;
+		bits = AXP809_OUTPUT_CTRL2_ELDO2_EN;
+		break;
+	case 1:
+		addr = AXP809_ELDO1_CTRL;
+		bits = AXP809_OUTPUT_CTRL2_ELDO1_EN;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL2, bits);
+
+	ret = pmic_bus_write(addr, cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL2, bits);
+}
+
+int axp_init(void)
+{
+        u8  axp_chip_id;
+	int ret;
+
+	ret = pmic_bus_init();
+	if (ret)
+		return ret;
+
+	ret = pmic_bus_read(AXP809_VERSION, &axp_chip_id);
+	if (ret)
+		return ret;
+
+	axp_chip_id &= AXP809_VERSION_CHIPID_MASK;
+	if (!(axp_chip_id == AXP809_VERSION_CHIPID))
+		return -ENODEV;
+
+	return 0;
+}
+
+int do_poweroff(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	pmic_bus_write(AXP809_SHUTDOWN, AXP809_SHUTDOWN_POWEROFF);
+
+	/* infinite loop during shutdown */
+	while (1) {}
+
+	/* not reached */
+	return 0;
+}