1 files changed, 209 insertions, 8 deletions

diff --git a/drivers/mfd/max14577.c b/drivers/mfd/max14577.c
index 6f39dec9dfdf..20e3b2d81bf0 100644
--- a/drivers/mfd/max14577.c
+++ b/drivers/mfd/max14577.c
@@ -1,7 +1,7 @@
 /*
- * max14577.c - mfd core driver for the Maxim 14577
+ * max14577.c - mfd core driver for the Maxim 14577/77836
  *
- * Copyright (C) 2013 Samsung Electrnoics
+ * Copyright (C) 2014 Samsung Electrnoics
  * Chanwoo Choi <cw00.choi@samsung.com>
  * Krzysztof Kozlowski <k.kozlowski@samsung.com>
  *
@@ -38,11 +38,34 @@ static struct mfd_cell max14577_devs[] = {
 	{ .name = "max14577-charger", },
 };
 
+static struct mfd_cell max77836_devs[] = {
+	{
+		.name = "max77836-muic",
+		.of_compatible = "maxim,max77836-muic",
+	},
+	{
+		.name = "max77836-regulator",
+		.of_compatible = "maxim,max77836-regulator",
+	},
+	{
+		.name = "max77836-charger",
+		.of_compatible = "maxim,max77836-charger",
+	},
+	{
+		.name = "max77836-battery",
+		.of_compatible = "maxim,max77836-battery",
+	},
+};
+
 static struct of_device_id max14577_dt_match[] = {
 	{
 		.compatible = "maxim,max14577",
 		.data = (void *)MAXIM_DEVICE_TYPE_MAX14577,
 	},
+	{
+		.compatible = "maxim,max77836",
+		.data = (void *)MAXIM_DEVICE_TYPE_MAX77836,
+	},
 	{},
 };
 
@@ -57,6 +80,26 @@ static bool max14577_muic_volatile_reg(struct device *dev, unsigned int reg)
 	return false;
 }
 
+static bool max77836_muic_volatile_reg(struct device *dev, unsigned int reg)
+{
+	/* Any max14577 volatile registers are also max77836 volatile. */
+	if (max14577_muic_volatile_reg(dev, reg))
+		return true;
+
+	switch (reg) {
+	case MAX77836_FG_REG_VCELL_MSB ... MAX77836_FG_REG_SOC_LSB:
+	case MAX77836_FG_REG_CRATE_MSB ... MAX77836_FG_REG_CRATE_LSB:
+	case MAX77836_FG_REG_STATUS_H ... MAX77836_FG_REG_STATUS_L:
+	case MAX77836_PMIC_REG_INTSRC:
+	case MAX77836_PMIC_REG_TOPSYS_INT:
+	case MAX77836_PMIC_REG_TOPSYS_STAT:
+		return true;
+	default:
+		break;
+	}
+	return false;
+}
+
 static const struct regmap_config max14577_muic_regmap_config = {
 	.reg_bits	= 8,
 	.val_bits	= 8,
@@ -64,6 +107,13 @@ static const struct regmap_config max14577_muic_regmap_config = {
 	.max_register	= MAX14577_REG_END,
 };
 
+static const struct regmap_config max77836_pmic_regmap_config = {
+	.reg_bits	= 8,
+	.val_bits	= 8,
+	.volatile_reg	= max77836_muic_volatile_reg,
+	.max_register	= MAX77836_PMIC_REG_END,
+};
+
 static const struct regmap_irq max14577_irqs[] = {
 	/* INT1 interrupts */
 	{ .reg_offset = 0, .mask = MAX14577_INT1_ADC_MASK, },
@@ -86,12 +136,56 @@ static const struct regmap_irq_chip max14577_irq_chip = {
 	.name			= "max14577",
 	.status_base		= MAX14577_REG_INT1,
 	.mask_base		= MAX14577_REG_INTMASK1,
-	.mask_invert		= 1,
+	.mask_invert		= true,
 	.num_regs		= 3,
 	.irqs			= max14577_irqs,
 	.num_irqs		= ARRAY_SIZE(max14577_irqs),
 };
 
+static const struct regmap_irq max77836_muic_irqs[] = {
+	/* INT1 interrupts */
+	{ .reg_offset = 0, .mask = MAX14577_INT1_ADC_MASK, },
+	{ .reg_offset = 0, .mask = MAX14577_INT1_ADCLOW_MASK, },
+	{ .reg_offset = 0, .mask = MAX14577_INT1_ADCERR_MASK, },
+	/* INT2 interrupts */
+	{ .reg_offset = 1, .mask = MAX14577_INT2_CHGTYP_MASK, },
+	{ .reg_offset = 1, .mask = MAX14577_INT2_CHGDETRUN_MASK, },
+	{ .reg_offset = 1, .mask = MAX14577_INT2_DCDTMR_MASK, },
+	{ .reg_offset = 1, .mask = MAX14577_INT2_DBCHG_MASK, },
+	{ .reg_offset = 1, .mask = MAX14577_INT2_VBVOLT_MASK, },
+	{ .reg_offset = 1, .mask = MAX77836_INT2_VIDRM_MASK, },
+	/* INT3 interrupts */
+	{ .reg_offset = 2, .mask = MAX14577_INT3_EOC_MASK, },
+	{ .reg_offset = 2, .mask = MAX14577_INT3_CGMBC_MASK, },
+	{ .reg_offset = 2, .mask = MAX14577_INT3_OVP_MASK, },
+	{ .reg_offset = 2, .mask = MAX14577_INT3_MBCCHGERR_MASK, },
+};
+
+static const struct regmap_irq_chip max77836_muic_irq_chip = {
+	.name			= "max77836-muic",
+	.status_base		= MAX14577_REG_INT1,
+	.mask_base		= MAX14577_REG_INTMASK1,
+	.mask_invert		= true,
+	.num_regs		= 3,
+	.irqs			= max77836_muic_irqs,
+	.num_irqs		= ARRAY_SIZE(max77836_muic_irqs),
+};
+
+static const struct regmap_irq max77836_pmic_irqs[] = {
+	{ .reg_offset = 0, .mask = MAX77836_TOPSYS_INT_T120C_MASK, },
+	{ .reg_offset = 0, .mask = MAX77836_TOPSYS_INT_T140C_MASK, },
+};
+
+static const struct regmap_irq_chip max77836_pmic_irq_chip = {
+	.name			= "max77836-pmic",
+	.status_base		= MAX77836_PMIC_REG_TOPSYS_INT,
+	.mask_base		= MAX77836_PMIC_REG_TOPSYS_INT_MASK,
+	.mask_invert		= false,
+	.num_regs		= 1,
+	.irqs			= max77836_pmic_irqs,
+	.num_irqs		= ARRAY_SIZE(max77836_pmic_irqs),
+};
+
 static void max14577_print_dev_type(struct max14577 *max14577)
 {
 	u8 reg_data, vendor_id, device_id;
@@ -114,6 +208,81 @@ static void max14577_print_dev_type(struct max14577 *max14577)
 			max14577->dev_type, device_id, vendor_id);
 }
 
+/*
+ * Max77836 specific initialization code for driver probe.
+ * Adds new I2C dummy device, regmap and regmap IRQ chip.
+ * Unmasks Interrupt Source register.
+ *
+ * On success returns 0.
+ * On failure returns errno and reverts any changes done so far (e.g. remove
+ * I2C dummy device), except masking the INT SRC register.
+ */
+static int max77836_init(struct max14577 *max14577)
+{
+	int ret;
+	u8 intsrc_mask;
+
+	max14577->i2c_pmic = i2c_new_dummy(max14577->i2c->adapter,
+			I2C_ADDR_PMIC);
+	if (!max14577->i2c_pmic) {
+		dev_err(max14577->dev, "Failed to register PMIC I2C device\n");
+		return -ENODEV;
+	}
+	i2c_set_clientdata(max14577->i2c_pmic, max14577);
+
+	max14577->regmap_pmic = devm_regmap_init_i2c(max14577->i2c_pmic,
+			&max77836_pmic_regmap_config);
+	if (IS_ERR(max14577->regmap_pmic)) {
+		ret = PTR_ERR(max14577->regmap_pmic);
+		dev_err(max14577->dev, "Failed to allocate PMIC register map: %d\n",
+				ret);
+		goto err;
+	}
+
+	/* Un-mask MAX77836 Interrupt Source register */
+	ret = max14577_read_reg(max14577->regmap_pmic,
+			MAX77836_PMIC_REG_INTSRC_MASK, &intsrc_mask);
+	if (ret < 0) {
+		dev_err(max14577->dev, "Failed to read PMIC register\n");
+		goto err;
+	}
+
+	intsrc_mask &= ~(MAX77836_INTSRC_MASK_TOP_INT_MASK);
+	intsrc_mask &= ~(MAX77836_INTSRC_MASK_MUIC_CHG_INT_MASK);
+	ret = max14577_write_reg(max14577->regmap_pmic,
+			MAX77836_PMIC_REG_INTSRC_MASK, intsrc_mask);
+	if (ret < 0) {
+		dev_err(max14577->dev, "Failed to write PMIC register\n");
+		goto err;
+	}
+
+	ret = regmap_add_irq_chip(max14577->regmap_pmic, max14577->irq,
+			IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED,
+			0, &max77836_pmic_irq_chip,
+			&max14577->irq_data_pmic);
+	if (ret != 0) {
+		dev_err(max14577->dev, "Failed to request PMIC IRQ %d: %d\n",
+				max14577->irq, ret);
+		goto err;
+	}
+
+	return 0;
+
+err:
+	i2c_unregister_device(max14577->i2c_pmic);
+
+	return ret;
+}
+
+/*
+ * Max77836 specific de-initialization code for driver remove.
+ */
+static void max77836_remove(struct max14577 *max14577)
+{
+	regmap_del_irq_chip(max14577->irq, max14577->irq_data_pmic);
+	i2c_unregister_device(max14577->i2c_pmic);
+}
+
 static int max14577_i2c_probe(struct i2c_client *i2c,
 			      const struct i2c_device_id *id)
 {
@@ -121,6 +290,10 @@ static int max14577_i2c_probe(struct i2c_client *i2c,
 	struct max14577_platform_data *pdata = dev_get_platdata(&i2c->dev);
 	struct device_node *np = i2c->dev.of_node;
 	int ret = 0;
+	const struct regmap_irq_chip *irq_chip;
+	struct mfd_cell *mfd_devs;
+	unsigned int mfd_devs_size;
+	int irq_flags;
 
 	if (np) {
 		pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);
@@ -164,9 +337,24 @@ static int max14577_i2c_probe(struct i2c_client *i2c,
 
 	max14577_print_dev_type(max14577);
 
+	switch (max14577->dev_type) {
+	case MAXIM_DEVICE_TYPE_MAX77836:
+		irq_chip = &max77836_muic_irq_chip;
+		mfd_devs = max77836_devs;
+		mfd_devs_size = ARRAY_SIZE(max77836_devs);
+		irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
+		break;
+	case MAXIM_DEVICE_TYPE_MAX14577:
+	default:
+		irq_chip = &max14577_irq_chip;
+		mfd_devs = max14577_devs;
+		mfd_devs_size = ARRAY_SIZE(max14577_devs);
+		irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
+		break;
+	}
+
 	ret = regmap_add_irq_chip(max14577->regmap, max14577->irq,
-				  IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 0,
-				  &max14577_irq_chip,
+				  irq_flags, 0, irq_chip,
 				  &max14577->irq_data);
 	if (ret != 0) {
 		dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
@@ -174,8 +362,15 @@ static int max14577_i2c_probe(struct i2c_client *i2c,
 		return ret;
 	}
 
-	ret = mfd_add_devices(max14577->dev, -1, max14577_devs,
-			ARRAY_SIZE(max14577_devs), NULL, 0,
+	/* Max77836 specific initialization code (additional regmap) */
+	if (max14577->dev_type == MAXIM_DEVICE_TYPE_MAX77836) {
+		ret = max77836_init(max14577);
+		if (ret < 0)
+			goto err_max77836;
+	}
+
+	ret = mfd_add_devices(max14577->dev, -1, mfd_devs,
+			mfd_devs_size, NULL, 0,
 			regmap_irq_get_domain(max14577->irq_data));
 	if (ret < 0)
 		goto err_mfd;
@@ -185,6 +380,9 @@ static int max14577_i2c_probe(struct i2c_client *i2c,
 	return 0;
 
 err_mfd:
+	if (max14577->dev_type == MAXIM_DEVICE_TYPE_MAX77836)
+		max77836_remove(max14577);
+err_max77836:
 	regmap_del_irq_chip(max14577->irq, max14577->irq_data);
 
 	return ret;
@@ -196,12 +394,15 @@ static int max14577_i2c_remove(struct i2c_client *i2c)
 
 	mfd_remove_devices(max14577->dev);
 	regmap_del_irq_chip(max14577->irq, max14577->irq_data);
+	if (max14577->dev_type == MAXIM_DEVICE_TYPE_MAX77836)
+		max77836_remove(max14577);
 
 	return 0;
 }
 
 static const struct i2c_device_id max14577_i2c_id[] = {
 	{ "max14577", MAXIM_DEVICE_TYPE_MAX14577, },
+	{ "max77836", MAXIM_DEVICE_TYPE_MAX77836, },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, max14577_i2c_id);
@@ -274,5 +475,5 @@ static void __exit max14577_i2c_exit(void)
 module_exit(max14577_i2c_exit);
 
 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>, Krzysztof Kozlowski <k.kozlowski@samsung.com>");
-MODULE_DESCRIPTION("MAXIM 14577 multi-function core driver");
+MODULE_DESCRIPTION("Maxim 14577/77836 multi-function core driver");
 MODULE_LICENSE("GPL");