[U-Boot] [PATCH 2/9] sun6i: Add basic axp221 driver

[Hans de Goede]

From: Oliver Schinagl <oliver at schinagl.nl>

The A31 uses the AXP221 pmic for various voltages.

Signed-off-by: Oliver Schinagl <oliver at schinagl.nl>
Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 board/sunxi/board.c        |  14 ++++++
 configs/Colombus_defconfig |   1 +
 drivers/power/Makefile     |   1 +
 drivers/power/axp221.c     | 103 +++++++++++++++++++++++++++++++++++++++++++++
 include/axp221.h           |  30 +++++++++++++
 5 files changed, 149 insertions(+)
 create mode 100644 drivers/power/axp221.c
 create mode 100644 include/axp221.h

diff --git a/board/sunxi/board.c b/board/sunxi/board.c
index 8d5d03e..75b29b0 100644
--- a/board/sunxi/board.c
+++ b/board/sunxi/board.c
@@ -19,6 +19,9 @@
 #ifdef CONFIG_AXP209_POWER
 #include <axp209.h>
 #endif
+#ifdef CONFIG_AXP221_POWER
+#include <axp221.h>
+#endif
 #include <asm/arch/clock.h>
 #include <asm/arch/cpu.h>
 #include <asm/arch/dram.h>
@@ -173,6 +176,17 @@ void sunxi_board_init(void)
 	power_failed |= axp209_set_ldo3(2800);
 	power_failed |= axp209_set_ldo4(2800);
 #endif
+#ifdef CONFIG_AXP221_POWER
+	power_failed = axp221_init();
+	power_failed |= axp221_set_dcdc1(3000);
+	power_failed |= axp221_set_dcdc2(1200);
+	power_failed |= axp221_set_dcdc3(1200);
+	power_failed |= axp221_set_dcdc4(1200);
+	power_failed |= axp221_set_dcdc5(1500);
+#ifdef CONFIG_ENABLE_DLDO1_POWER
+	power_failed |= axp221_set_dldo1(3300);
+#endif
+#endif
 
 	printf("DRAM:");
 	ramsize = sunxi_dram_init();
diff --git a/configs/Colombus_defconfig b/configs/Colombus_defconfig
index 8ba0029..06fb642 100644
--- a/configs/Colombus_defconfig
+++ b/configs/Colombus_defconfig
@@ -1,3 +1,4 @@
+CONFIG_SYS_EXTRA_OPTIONS="AXP221_POWER"
 CONFIG_ARM=y
 CONFIG_ARCH_SUNXI=y
 CONFIG_MACH_SUN6I=y
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index dc64e4d..04bd996 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -7,6 +7,7 @@
 
 obj-$(CONFIG_AXP152_POWER)	+= axp152.o
 obj-$(CONFIG_AXP209_POWER)	+= axp209.o
+obj-$(CONFIG_AXP221_POWER)	+= axp221.o
 obj-$(CONFIG_EXYNOS_TMU)	+= exynos-tmu.o
 obj-$(CONFIG_FTPMU010_POWER)	+= ftpmu010.o
 obj-$(CONFIG_TPS6586X_POWER)	+= tps6586x.o
diff --git a/drivers/power/axp221.c b/drivers/power/axp221.c
new file mode 100644
index 0000000..9985fe3
--- /dev/null
+++ b/drivers/power/axp221.c
@@ -0,0 +1,103 @@
+/*
+ * (C) Copyright 2013 Oliver Schinagl <oliver at schinagl.nl>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <asm/arch/p2wi.h>
+#include <axp221.h>
+
+static u8 axp221_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 axp221_set_dcdc1(unsigned int mvolt)
+{
+	int ret;
+	u8 cfg = axp221_mvolt_to_cfg(mvolt, 1600, 3400, 100);
+
+	ret = p2wi_write(AXP221_DCDC1_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	ret = p2wi_read(AXP221_OUTPUT_CTRL2, &cfg);
+	if (ret)
+		return ret;
+
+	cfg |= 1 << 7;
+	return p2wi_write(AXP221_OUTPUT_CTRL2, cfg);
+}
+
+int axp221_set_dcdc2(unsigned int mvolt)
+{
+	u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1540, 20);
+
+	return p2wi_write(AXP221_DCDC2_CTRL, cfg);
+}
+
+int axp221_set_dcdc3(unsigned int mvolt)
+{
+	u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1860, 20);
+
+	return p2wi_write(AXP221_DCDC3_CTRL, cfg);
+}
+
+int axp221_set_dcdc4(unsigned int mvolt)
+{
+	u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1540, 20);
+
+	return p2wi_write(AXP221_DCDC4_CTRL, cfg);
+}
+
+int axp221_set_dcdc5(unsigned int mvolt)
+{
+	u8 cfg = axp221_mvolt_to_cfg(mvolt, 1000, 2550, 50);
+
+	return p2wi_write(AXP221_DCDC5_CTRL, cfg);
+}
+
+int axp221_set_dldo1(unsigned int mvolt)
+{
+	int ret;
+	u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
+
+	ret = p2wi_write(AXP221_DLDO1_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	ret = p2wi_read(AXP221_OUTPUT_CTRL2, &cfg);
+	if (ret)
+		return ret;
+
+	cfg |= 1 << 3;
+	return p2wi_write(AXP221_OUTPUT_CTRL2, cfg);
+}
+
+int axp221_init(void)
+{
+	u8 axp_chip_id;
+	int ret;
+
+	p2wi_init();
+	ret = p2wi_set_pmu_address(AXP221_CHIP_ADDR, AXP221_CTRL_ADDR,
+				   AXP221_INIT_DATA);
+	if (ret)
+		return ret;
+
+	ret = p2wi_read(AXP221_CHIP_ID, &axp_chip_id);
+	if (ret)
+		return ret;
+
+	if (!(axp_chip_id == 0x6 || axp_chip_id == 0x7 || axp_chip_id == 0x17))
+		return -ENODEV;
+
+	return 0;
+}
diff --git a/include/axp221.h b/include/axp221.h
new file mode 100644
index 0000000..c3a6cf4
--- /dev/null
+++ b/include/axp221.h
@@ -0,0 +1,30 @@
+/*
+ * (C) Copyright 2013 Oliver Schinagl <oliver at schinagl.nl>
+ *
+ * X-Powers AXP221 Power Management IC driver
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#define AXP221_CHIP_ADDR 0x68
+#define AXP221_CTRL_ADDR 0x3e
+#define AXP221_INIT_DATA 0x3e
+
+#define AXP221_CHIP_ID		0x03
+#define AXP221_OUTPUT_CTRL1	0x10
+#define AXP221_OUTPUT_CTRL2	0x12
+#define AXP221_OUTPUT_CTRL3	0x13
+#define AXP221_DLDO1_CTRL	0x15
+#define AXP221_DCDC1_CTRL	0x21
+#define AXP221_DCDC2_CTRL	0x22
+#define AXP221_DCDC3_CTRL	0x23
+#define AXP221_DCDC4_CTRL	0x24
+#define AXP221_DCDC5_CTRL	0x25
+
+int axp221_set_dcdc1(unsigned int mvolt);
+int axp221_set_dcdc2(unsigned int mvolt);
+int axp221_set_dcdc3(unsigned int mvolt);
+int axp221_set_dcdc4(unsigned int mvolt);
+int axp221_set_dcdc5(unsigned int mvolt);
+int axp221_set_dldo1(unsigned int mvolt);
+int axp221_init(void);
-- 
2.1.0