mfd: axp20x: Add AXP22x PMIC support

Add support for the AXP22x PMIC devices to the existing AXP20x driver.
This includes the AXP221 and AXP223, which are identical except for
the external data bus. Only AXP221 is added for now. AXP223 will be
added after it's Reduced Serial Bus (RSB) interface is supported.

AXP22x defines a new set of registers, power supplies and regulators,
but most of the API is similar to the AXP20x ones.

A new irq chip definition is used, even though the available interrupts
on AXP22x is a subset of those on AXP20x. This is done so the interrupt
numbers match those on the datasheet.

This patch only enables the interrupts, system power-off function, and PEK
sub-device. The regulator driver must first support different variants
before we enable it from the mfd driver.

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
[wens@csie.org: fix interrupts and move regulators to separate patch]
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/axp20x.c

@@ -32,6 +32,7 @@
 static const char * const axp20x_model_names[] = {
 	"AXP202",
 	"AXP209",
+	"AXP221",
 	"AXP288",
 };
 
@@ -54,6 +55,25 @@ static const struct regmap_access_table axp20x_volatile_table = {
 	.n_yes_ranges	= ARRAY_SIZE(axp20x_volatile_ranges),
 };
 
+static const struct regmap_range axp22x_writeable_ranges[] = {
+	regmap_reg_range(AXP20X_DATACACHE(0), AXP20X_IRQ5_STATE),
+	regmap_reg_range(AXP20X_DCDC_MODE, AXP22X_BATLOW_THRES1),
+};
+
+static const struct regmap_range axp22x_volatile_ranges[] = {
+	regmap_reg_range(AXP20X_IRQ1_EN, AXP20X_IRQ5_STATE),
+};
+
+static const struct regmap_access_table axp22x_writeable_table = {
+	.yes_ranges	= axp22x_writeable_ranges,
+	.n_yes_ranges	= ARRAY_SIZE(axp22x_writeable_ranges),
+};
+
+static const struct regmap_access_table axp22x_volatile_table = {
+	.yes_ranges	= axp22x_volatile_ranges,
+	.n_yes_ranges	= ARRAY_SIZE(axp22x_volatile_ranges),
+};
+
 static const struct regmap_range axp288_writeable_ranges[] = {
 	regmap_reg_range(AXP20X_DATACACHE(0), AXP20X_IRQ6_STATE),
 	regmap_reg_range(AXP20X_DCDC_MODE, AXP288_FG_TUNE5),
@@ -87,6 +107,20 @@ static struct resource axp20x_pek_resources[] = {
 	},
 };
 
+static struct resource axp22x_pek_resources[] = {
+	{
+		.name   = "PEK_DBR",
+		.start  = AXP22X_IRQ_PEK_RIS_EDGE,
+		.end    = AXP22X_IRQ_PEK_RIS_EDGE,
+		.flags  = IORESOURCE_IRQ,
+	}, {
+		.name   = "PEK_DBF",
+		.start  = AXP22X_IRQ_PEK_FAL_EDGE,
+		.end    = AXP22X_IRQ_PEK_FAL_EDGE,
+		.flags  = IORESOURCE_IRQ,
+	},
+};
+
 static struct resource axp288_fuel_gauge_resources[] = {
 	{
 		.start = AXP288_IRQ_QWBTU,
@@ -129,6 +163,15 @@ static const struct regmap_config axp20x_regmap_config = {
 	.cache_type	= REGCACHE_RBTREE,
 };
 
+static const struct regmap_config axp22x_regmap_config = {
+	.reg_bits	= 8,
+	.val_bits	= 8,
+	.wr_table	= &axp22x_writeable_table,
+	.volatile_table	= &axp22x_volatile_table,
+	.max_register	= AXP22X_BATLOW_THRES1,
+	.cache_type	= REGCACHE_RBTREE,
+};
+
 static const struct regmap_config axp288_regmap_config = {
 	.reg_bits	= 8,
 	.val_bits	= 8,
@@ -181,6 +224,34 @@ static const struct regmap_irq axp20x_regmap_irqs[] = {
 	INIT_REGMAP_IRQ(AXP20X, GPIO0_INPUT,		4, 0),
 };
 
+static const struct regmap_irq axp22x_regmap_irqs[] = {
+	INIT_REGMAP_IRQ(AXP22X, ACIN_OVER_V,		0, 7),
+	INIT_REGMAP_IRQ(AXP22X, ACIN_PLUGIN,		0, 6),
+	INIT_REGMAP_IRQ(AXP22X, ACIN_REMOVAL,	        0, 5),
+	INIT_REGMAP_IRQ(AXP22X, VBUS_OVER_V,		0, 4),
+	INIT_REGMAP_IRQ(AXP22X, VBUS_PLUGIN,		0, 3),
+	INIT_REGMAP_IRQ(AXP22X, VBUS_REMOVAL,	        0, 2),
+	INIT_REGMAP_IRQ(AXP22X, VBUS_V_LOW,		0, 1),
+	INIT_REGMAP_IRQ(AXP22X, BATT_PLUGIN,		1, 7),
+	INIT_REGMAP_IRQ(AXP22X, BATT_REMOVAL,	        1, 6),
+	INIT_REGMAP_IRQ(AXP22X, BATT_ENT_ACT_MODE,	1, 5),
+	INIT_REGMAP_IRQ(AXP22X, BATT_EXIT_ACT_MODE,	1, 4),
+	INIT_REGMAP_IRQ(AXP22X, CHARG,		        1, 3),
+	INIT_REGMAP_IRQ(AXP22X, CHARG_DONE,		1, 2),
+	INIT_REGMAP_IRQ(AXP22X, BATT_TEMP_HIGH,	        1, 1),
+	INIT_REGMAP_IRQ(AXP22X, BATT_TEMP_LOW,	        1, 0),
+	INIT_REGMAP_IRQ(AXP22X, DIE_TEMP_HIGH,	        2, 7),
+	INIT_REGMAP_IRQ(AXP22X, PEK_SHORT,		2, 1),
+	INIT_REGMAP_IRQ(AXP22X, PEK_LONG,		2, 0),
+	INIT_REGMAP_IRQ(AXP22X, LOW_PWR_LVL1,	        3, 1),
+	INIT_REGMAP_IRQ(AXP22X, LOW_PWR_LVL2,	        3, 0),
+	INIT_REGMAP_IRQ(AXP22X, TIMER,		        4, 7),
+	INIT_REGMAP_IRQ(AXP22X, PEK_RIS_EDGE,	        4, 6),
+	INIT_REGMAP_IRQ(AXP22X, PEK_FAL_EDGE,	        4, 5),
+	INIT_REGMAP_IRQ(AXP22X, GPIO1_INPUT,		4, 1),
+	INIT_REGMAP_IRQ(AXP22X, GPIO0_INPUT,		4, 0),
+};
+
 /* some IRQs are compatible with axp20x models */
 static const struct regmap_irq axp288_regmap_irqs[] = {
 	INIT_REGMAP_IRQ(AXP288, VBUS_FALL,              0, 2),
@@ -224,6 +295,7 @@ static const struct regmap_irq axp288_regmap_irqs[] = {
 static const struct of_device_id axp20x_of_match[] = {
 	{ .compatible = "x-powers,axp202", .data = (void *) AXP202_ID },
 	{ .compatible = "x-powers,axp209", .data = (void *) AXP209_ID },
+	{ .compatible = "x-powers,axp221", .data = (void *) AXP221_ID },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, axp20x_of_match);
@@ -258,6 +330,18 @@ static const struct regmap_irq_chip axp20x_regmap_irq_chip = {
 
 };
 
+static const struct regmap_irq_chip axp22x_regmap_irq_chip = {
+	.name			= "axp22x_irq_chip",
+	.status_base		= AXP20X_IRQ1_STATE,
+	.ack_base		= AXP20X_IRQ1_STATE,
+	.mask_base		= AXP20X_IRQ1_EN,
+	.mask_invert		= true,
+	.init_ack_masked	= true,
+	.irqs			= axp22x_regmap_irqs,
+	.num_irqs		= ARRAY_SIZE(axp22x_regmap_irqs),
+	.num_regs		= 5,
+};
+
 static const struct regmap_irq_chip axp288_regmap_irq_chip = {
 	.name			= "axp288_irq_chip",
 	.status_base		= AXP20X_IRQ1_STATE,
@@ -281,6 +365,14 @@ static struct mfd_cell axp20x_cells[] = {
 	},
 };
 
+static struct mfd_cell axp22x_cells[] = {
+	{
+		.name			= "axp20x-pek",
+		.num_resources		= ARRAY_SIZE(axp22x_pek_resources),
+		.resources		= axp22x_pek_resources,
+	},
+};
+
 static struct resource axp288_adc_resources[] = {
 	{
 		.name  = "GPADC",
@@ -426,6 +518,12 @@ static int axp20x_match_device(struct axp20x_dev *axp20x, struct device *dev)
 		axp20x->regmap_cfg = &axp20x_regmap_config;
 		axp20x->regmap_irq_chip = &axp20x_regmap_irq_chip;
 		break;
+	case AXP221_ID:
+		axp20x->nr_cells = ARRAY_SIZE(axp22x_cells);
+		axp20x->cells = axp22x_cells;
+		axp20x->regmap_cfg = &axp22x_regmap_config;
+		axp20x->regmap_irq_chip = &axp22x_regmap_irq_chip;
+		break;
 	case AXP288_ID:
 		axp20x->cells = axp288_cells;
 		axp20x->nr_cells = ARRAY_SIZE(axp288_cells);

include/linux/mfd/axp20x.h

@@ -14,6 +14,7 @@
 enum {
 	AXP202_ID = 0,
 	AXP209_ID,
+	AXP221_ID,
 	AXP288_ID,
 	NR_AXP20X_VARIANTS,
 };
@@ -45,6 +46,28 @@ enum {
 #define AXP20X_V_LTF_DISCHRG		0x3c
 #define AXP20X_V_HTF_DISCHRG		0x3d
 
+#define AXP22X_PWR_OUT_CTRL1		0x10
+#define AXP22X_PWR_OUT_CTRL2		0x12
+#define AXP22X_PWR_OUT_CTRL3		0x13
+#define AXP22X_DLDO1_V_OUT		0x15
+#define AXP22X_DLDO2_V_OUT		0x16
+#define AXP22X_DLDO3_V_OUT		0x17
+#define AXP22X_DLDO4_V_OUT		0x18
+#define AXP22X_ELDO1_V_OUT		0x19
+#define AXP22X_ELDO2_V_OUT		0x1a
+#define AXP22X_ELDO3_V_OUT		0x1b
+#define AXP22X_DC5LDO_V_OUT		0x1c
+#define AXP22X_DCDC1_V_OUT		0x21
+#define AXP22X_DCDC2_V_OUT		0x22
+#define AXP22X_DCDC3_V_OUT		0x23
+#define AXP22X_DCDC4_V_OUT		0x24
+#define AXP22X_DCDC5_V_OUT		0x25
+#define AXP22X_DCDC23_V_RAMP_CTRL	0x27
+#define AXP22X_ALDO1_V_OUT		0x28
+#define AXP22X_ALDO2_V_OUT		0x29
+#define AXP22X_ALDO3_V_OUT		0x2a
+#define AXP22X_CHRG_CTRL3		0x35
+
 /* Interrupt */
 #define AXP20X_IRQ1_EN			0x40
 #define AXP20X_IRQ2_EN			0x41
@@ -100,6 +123,9 @@ enum {
 #define AXP20X_VBUS_MON			0x8b
 #define AXP20X_OVER_TMP			0x8f
 
+#define AXP22X_PWREN_CTRL1		0x8c
+#define AXP22X_PWREN_CTRL2		0x8d
+
 /* GPIO */
 #define AXP20X_GPIO0_CTRL		0x90
 #define AXP20X_LDO5_V_OUT		0x91
@@ -108,6 +134,11 @@ enum {
 #define AXP20X_GPIO20_SS		0x94
 #define AXP20X_GPIO3_CTRL		0x95
 
+#define AXP22X_LDO_IO0_V_OUT		0x91
+#define AXP22X_LDO_IO1_V_OUT		0x93
+#define AXP22X_GPIO_STATE		0x94
+#define AXP22X_GPIO_PULL_DOWN		0x95
+
 /* Battery */
 #define AXP20X_CHRG_CC_31_24		0xb0
 #define AXP20X_CHRG_CC_23_16		0xb1
@@ -120,6 +151,9 @@ enum {
 #define AXP20X_CC_CTRL			0xb8
 #define AXP20X_FG_RES			0xb9
 
+/* AXP22X specific registers */
+#define AXP22X_BATLOW_THRES1		0xe6
+
 /* AXP288 specific registers */
 #define AXP288_PMIC_ADC_H               0x56
 #define AXP288_PMIC_ADC_L               0x57
@@ -158,6 +192,30 @@ enum {
 	AXP20X_REG_ID_MAX,
 };
 
+enum {
+	AXP22X_DCDC1 = 0,
+	AXP22X_DCDC2,
+	AXP22X_DCDC3,
+	AXP22X_DCDC4,
+	AXP22X_DCDC5,
+	AXP22X_DC1SW,
+	AXP22X_DC5LDO,
+	AXP22X_ALDO1,
+	AXP22X_ALDO2,
+	AXP22X_ALDO3,
+	AXP22X_ELDO1,
+	AXP22X_ELDO2,
+	AXP22X_ELDO3,
+	AXP22X_DLDO1,
+	AXP22X_DLDO2,
+	AXP22X_DLDO3,
+	AXP22X_DLDO4,
+	AXP22X_RTC_LDO,
+	AXP22X_LDO_IO0,
+	AXP22X_LDO_IO1,
+	AXP22X_REG_ID_MAX,
+};
+
 /* IRQs */
 enum {
 	AXP20X_IRQ_ACIN_OVER_V = 1,
@@ -199,6 +257,34 @@ enum {
 	AXP20X_IRQ_GPIO0_INPUT,
 };
 
+enum axp22x_irqs {
+	AXP22X_IRQ_ACIN_OVER_V = 1,
+	AXP22X_IRQ_ACIN_PLUGIN,
+	AXP22X_IRQ_ACIN_REMOVAL,
+	AXP22X_IRQ_VBUS_OVER_V,
+	AXP22X_IRQ_VBUS_PLUGIN,
+	AXP22X_IRQ_VBUS_REMOVAL,
+	AXP22X_IRQ_VBUS_V_LOW,
+	AXP22X_IRQ_BATT_PLUGIN,
+	AXP22X_IRQ_BATT_REMOVAL,
+	AXP22X_IRQ_BATT_ENT_ACT_MODE,
+	AXP22X_IRQ_BATT_EXIT_ACT_MODE,
+	AXP22X_IRQ_CHARG,
+	AXP22X_IRQ_CHARG_DONE,
+	AXP22X_IRQ_BATT_TEMP_HIGH,
+	AXP22X_IRQ_BATT_TEMP_LOW,
+	AXP22X_IRQ_DIE_TEMP_HIGH,
+	AXP22X_IRQ_PEK_SHORT,
+	AXP22X_IRQ_PEK_LONG,
+	AXP22X_IRQ_LOW_PWR_LVL1,
+	AXP22X_IRQ_LOW_PWR_LVL2,
+	AXP22X_IRQ_TIMER,
+	AXP22X_IRQ_PEK_RIS_EDGE,
+	AXP22X_IRQ_PEK_FAL_EDGE,
+	AXP22X_IRQ_GPIO1_INPUT,
+	AXP22X_IRQ_GPIO0_INPUT,
+};
+
 enum axp288_irqs {
 	AXP288_IRQ_VBUS_FALL     = 2,
 	AXP288_IRQ_VBUS_RISE,