mfd: AXP20x: Add mfd driver for AXP20x PMIC

This patch introduces the preliminary support for PMICs X-Powers AXP202
and AXP209. The AXP209 and AXP202 are the PMUs (Power Management Unit)
used by A10, A13 and A20 SoCs and developed by X-Powers, a sister company
of Allwinner.

The core enables support for two subsystems:
- PEK (Power Enable Key)
- Regulators

Signed-off-by: Carlo Caione <carlo@caione.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 180 insertions, 0 deletions

diff --git a/include/linux/mfd/axp20x.h b/include/linux/mfd/axp20x.h
new file mode 100644
index 000000000000..d0e31a2287ac
--- /dev/null
+++ b/include/linux/mfd/axp20x.h
@@ -0,0 +1,180 @@
+/*
+ * Functions and registers to access AXP20X power management chip.
+ *
+ * Copyright (C) 2013, Carlo Caione <carlo@caione.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __LINUX_MFD_AXP20X_H
+#define __LINUX_MFD_AXP20X_H
+
+enum {
+	AXP202_ID = 0,
+	AXP209_ID,
+};
+
+#define AXP20X_DATACACHE(m)		(0x04 + (m))
+
+/* Power supply */
+#define AXP20X_PWR_INPUT_STATUS		0x00
+#define AXP20X_PWR_OP_MODE		0x01
+#define AXP20X_USB_OTG_STATUS		0x02
+#define AXP20X_PWR_OUT_CTRL		0x12
+#define AXP20X_DCDC2_V_OUT		0x23
+#define AXP20X_DCDC2_LDO3_V_SCAL	0x25
+#define AXP20X_DCDC3_V_OUT		0x27
+#define AXP20X_LDO24_V_OUT		0x28
+#define AXP20X_LDO3_V_OUT		0x29
+#define AXP20X_VBUS_IPSOUT_MGMT		0x30
+#define AXP20X_V_OFF			0x31
+#define AXP20X_OFF_CTRL			0x32
+#define AXP20X_CHRG_CTRL1		0x33
+#define AXP20X_CHRG_CTRL2		0x34
+#define AXP20X_CHRG_BAK_CTRL		0x35
+#define AXP20X_PEK_KEY			0x36
+#define AXP20X_DCDC_FREQ		0x37
+#define AXP20X_V_LTF_CHRG		0x38
+#define AXP20X_V_HTF_CHRG		0x39
+#define AXP20X_APS_WARN_L1		0x3a
+#define AXP20X_APS_WARN_L2		0x3b
+#define AXP20X_V_LTF_DISCHRG		0x3c
+#define AXP20X_V_HTF_DISCHRG		0x3d
+
+/* Interrupt */
+#define AXP20X_IRQ1_EN			0x40
+#define AXP20X_IRQ2_EN			0x41
+#define AXP20X_IRQ3_EN			0x42
+#define AXP20X_IRQ4_EN			0x43
+#define AXP20X_IRQ5_EN			0x44
+#define AXP20X_IRQ1_STATE		0x48
+#define AXP20X_IRQ2_STATE		0x49
+#define AXP20X_IRQ3_STATE		0x4a
+#define AXP20X_IRQ4_STATE		0x4b
+#define AXP20X_IRQ5_STATE		0x4c
+
+/* ADC */
+#define AXP20X_ACIN_V_ADC_H		0x56
+#define AXP20X_ACIN_V_ADC_L		0x57
+#define AXP20X_ACIN_I_ADC_H		0x58
+#define AXP20X_ACIN_I_ADC_L		0x59
+#define AXP20X_VBUS_V_ADC_H		0x5a
+#define AXP20X_VBUS_V_ADC_L		0x5b
+#define AXP20X_VBUS_I_ADC_H		0x5c
+#define AXP20X_VBUS_I_ADC_L		0x5d
+#define AXP20X_TEMP_ADC_H		0x5e
+#define AXP20X_TEMP_ADC_L		0x5f
+#define AXP20X_TS_IN_H			0x62
+#define AXP20X_TS_IN_L			0x63
+#define AXP20X_GPIO0_V_ADC_H		0x64
+#define AXP20X_GPIO0_V_ADC_L		0x65
+#define AXP20X_GPIO1_V_ADC_H		0x66
+#define AXP20X_GPIO1_V_ADC_L		0x67
+#define AXP20X_PWR_BATT_H		0x70
+#define AXP20X_PWR_BATT_M		0x71
+#define AXP20X_PWR_BATT_L		0x72
+#define AXP20X_BATT_V_H			0x78
+#define AXP20X_BATT_V_L			0x79
+#define AXP20X_BATT_CHRG_I_H		0x7a
+#define AXP20X_BATT_CHRG_I_L		0x7b
+#define AXP20X_BATT_DISCHRG_I_H		0x7c
+#define AXP20X_BATT_DISCHRG_I_L		0x7d
+#define AXP20X_IPSOUT_V_HIGH_H		0x7e
+#define AXP20X_IPSOUT_V_HIGH_L		0x7f
+
+/* Power supply */
+#define AXP20X_DCDC_MODE		0x80
+#define AXP20X_ADC_EN1			0x82
+#define AXP20X_ADC_EN2			0x83
+#define AXP20X_ADC_RATE			0x84
+#define AXP20X_GPIO10_IN_RANGE		0x85
+#define AXP20X_GPIO1_ADC_IRQ_RIS	0x86
+#define AXP20X_GPIO1_ADC_IRQ_FAL	0x87
+#define AXP20X_TIMER_CTRL		0x8a
+#define AXP20X_VBUS_MON			0x8b
+#define AXP20X_OVER_TMP			0x8f
+
+/* GPIO */
+#define AXP20X_GPIO0_CTRL		0x90
+#define AXP20X_LDO5_V_OUT		0x91
+#define AXP20X_GPIO1_CTRL		0x92
+#define AXP20X_GPIO2_CTRL		0x93
+#define AXP20X_GPIO20_SS		0x94
+#define AXP20X_GPIO3_CTRL		0x95
+
+/* Battery */
+#define AXP20X_CHRG_CC_31_24		0xb0
+#define AXP20X_CHRG_CC_23_16		0xb1
+#define AXP20X_CHRG_CC_15_8		0xb2
+#define AXP20X_CHRG_CC_7_0		0xb3
+#define AXP20X_DISCHRG_CC_31_24		0xb4
+#define AXP20X_DISCHRG_CC_23_16		0xb5
+#define AXP20X_DISCHRG_CC_15_8		0xb6
+#define AXP20X_DISCHRG_CC_7_0		0xb7
+#define AXP20X_CC_CTRL			0xb8
+#define AXP20X_FG_RES			0xb9
+
+/* Regulators IDs */
+enum {
+	AXP20X_LDO1 = 0,
+	AXP20X_LDO2,
+	AXP20X_LDO3,
+	AXP20X_LDO4,
+	AXP20X_LDO5,
+	AXP20X_DCDC2,
+	AXP20X_DCDC3,
+	AXP20X_REG_ID_MAX,
+};
+
+/* IRQs */
+enum {
+	AXP20X_IRQ_ACIN_OVER_V = 1,
+	AXP20X_IRQ_ACIN_PLUGIN,
+	AXP20X_IRQ_ACIN_REMOVAL,
+	AXP20X_IRQ_VBUS_OVER_V,
+	AXP20X_IRQ_VBUS_PLUGIN,
+	AXP20X_IRQ_VBUS_REMOVAL,
+	AXP20X_IRQ_VBUS_V_LOW,
+	AXP20X_IRQ_BATT_PLUGIN,
+	AXP20X_IRQ_BATT_REMOVAL,
+	AXP20X_IRQ_BATT_ENT_ACT_MODE,
+	AXP20X_IRQ_BATT_EXIT_ACT_MODE,
+	AXP20X_IRQ_CHARG,
+	AXP20X_IRQ_CHARG_DONE,
+	AXP20X_IRQ_BATT_TEMP_HIGH,
+	AXP20X_IRQ_BATT_TEMP_LOW,
+	AXP20X_IRQ_DIE_TEMP_HIGH,
+	AXP20X_IRQ_CHARG_I_LOW,
+	AXP20X_IRQ_DCDC1_V_LONG,
+	AXP20X_IRQ_DCDC2_V_LONG,
+	AXP20X_IRQ_DCDC3_V_LONG,
+	AXP20X_IRQ_PEK_SHORT = 22,
+	AXP20X_IRQ_PEK_LONG,
+	AXP20X_IRQ_N_OE_PWR_ON,
+	AXP20X_IRQ_N_OE_PWR_OFF,
+	AXP20X_IRQ_VBUS_VALID,
+	AXP20X_IRQ_VBUS_NOT_VALID,
+	AXP20X_IRQ_VBUS_SESS_VALID,
+	AXP20X_IRQ_VBUS_SESS_END,
+	AXP20X_IRQ_LOW_PWR_LVL1,
+	AXP20X_IRQ_LOW_PWR_LVL2,
+	AXP20X_IRQ_TIMER,
+	AXP20X_IRQ_PEK_RIS_EDGE,
+	AXP20X_IRQ_PEK_FAL_EDGE,
+	AXP20X_IRQ_GPIO3_INPUT,
+	AXP20X_IRQ_GPIO2_INPUT,
+	AXP20X_IRQ_GPIO1_INPUT,
+	AXP20X_IRQ_GPIO0_INPUT,
+};
+
+struct axp20x_dev {
+	struct device			*dev;
+	struct i2c_client		*i2c_client;
+	struct regmap			*regmap;
+	struct regmap_irq_chip_data	*regmap_irqc;
+	long				variant;
+};
+
+#endif /* __LINUX_MFD_AXP20X_H */