summaryrefslogtreecommitdiffstats
path: root/drivers/mfd/max14577.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mfd/max14577.c')
-rw-r--r--drivers/mfd/max14577.c347
1 files changed, 287 insertions, 60 deletions
diff --git a/drivers/mfd/max14577.c b/drivers/mfd/max14577.c
index 5f13cefe8def..4a5e885383f8 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>
*
@@ -21,11 +21,12 @@
#include <linux/err.h>
#include <linux/module.h>
#include <linux/interrupt.h>
+#include <linux/of_device.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max14577.h>
#include <linux/mfd/max14577-private.h>
-static struct mfd_cell max14577_devs[] = {
+static const struct mfd_cell max14577_devs[] = {
{
.name = "max14577-muic",
.of_compatible = "maxim,max14577-muic",
@@ -37,7 +38,38 @@ static struct mfd_cell max14577_devs[] = {
{ .name = "max14577-charger", },
};
-static bool max14577_volatile_reg(struct device *dev, unsigned int reg)
+static const 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 const 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,
+ },
+ {},
+};
+
+static bool max14577_muic_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case MAX14577_REG_INT1 ... MAX14577_REG_STATUS3:
@@ -48,49 +80,221 @@ static bool max14577_volatile_reg(struct device *dev, unsigned int reg)
return false;
}
-static const struct regmap_config max14577_regmap_config = {
+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,
- .volatile_reg = max14577_volatile_reg,
+ .volatile_reg = max14577_muic_volatile_reg,
.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 = INT1_ADC_MASK, },
- { .reg_offset = 0, .mask = INT1_ADCLOW_MASK, },
- { .reg_offset = 0, .mask = INT1_ADCERR_MASK, },
+ { .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 = INT2_CHGTYP_MASK, },
- { .reg_offset = 1, .mask = INT2_CHGDETRUN_MASK, },
- { .reg_offset = 1, .mask = INT2_DCDTMR_MASK, },
- { .reg_offset = 1, .mask = INT2_DBCHG_MASK, },
- { .reg_offset = 1, .mask = INT2_VBVOLT_MASK, },
+ { .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, },
/* INT3 interrupts */
- { .reg_offset = 2, .mask = INT3_EOC_MASK, },
- { .reg_offset = 2, .mask = INT3_CGMBC_MASK, },
- { .reg_offset = 2, .mask = INT3_OVP_MASK, },
- { .reg_offset = 2, .mask = INT3_MBCCHGERR_MASK, },
+ { .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 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, },
+ { .reg_offset = 0, .mask = MAX77836_INT1_ADC1K_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;
+ int ret;
+
+ ret = max14577_read_reg(max14577->regmap, MAX14577_REG_DEVICEID,
+ &reg_data);
+ if (ret) {
+ dev_err(max14577->dev,
+ "Failed to read DEVICEID register: %d\n", ret);
+ return;
+ }
+
+ vendor_id = ((reg_data & DEVID_VENDORID_MASK) >>
+ DEVID_VENDORID_SHIFT);
+ device_id = ((reg_data & DEVID_DEVICEID_MASK) >>
+ DEVID_DEVICEID_SHIFT);
+
+ dev_info(max14577->dev, "Device type: %u (ID: 0x%x, vendor: 0x%x)\n",
+ 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)
{
struct max14577 *max14577;
struct max14577_platform_data *pdata = dev_get_platdata(&i2c->dev);
struct device_node *np = i2c->dev.of_node;
- u8 reg_data;
int ret = 0;
+ const struct regmap_irq_chip *irq_chip;
+ const struct mfd_cell *mfd_devs;
+ unsigned int mfd_devs_size;
+ int irq_flags;
if (np) {
pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);
@@ -113,7 +317,8 @@ static int max14577_i2c_probe(struct i2c_client *i2c,
max14577->i2c = i2c;
max14577->irq = i2c->irq;
- max14577->regmap = devm_regmap_init_i2c(i2c, &max14577_regmap_config);
+ max14577->regmap = devm_regmap_init_i2c(i2c,
+ &max14577_muic_regmap_config);
if (IS_ERR(max14577->regmap)) {
ret = PTR_ERR(max14577->regmap);
dev_err(max14577->dev, "Failed to allocate register map: %d\n",
@@ -121,23 +326,37 @@ static int max14577_i2c_probe(struct i2c_client *i2c,
return ret;
}
- ret = max14577_read_reg(max14577->regmap, MAX14577_REG_DEVICEID,
- &reg_data);
- if (ret) {
- dev_err(max14577->dev, "Device not found on this channel: %d\n",
- ret);
- return ret;
+ if (np) {
+ const struct of_device_id *of_id;
+
+ of_id = of_match_device(max14577_dt_match, &i2c->dev);
+ if (of_id)
+ max14577->dev_type =
+ (enum maxim_device_type)of_id->data;
+ } else {
+ max14577->dev_type = id->driver_data;
+ }
+
+ 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;
}
- max14577->vendor_id = ((reg_data & DEVID_VENDORID_MASK) >>
- DEVID_VENDORID_SHIFT);
- max14577->device_id = ((reg_data & DEVID_DEVICEID_MASK) >>
- DEVID_DEVICEID_SHIFT);
- dev_info(max14577->dev, "Device ID: 0x%x, vendor: 0x%x\n",
- max14577->device_id, max14577->vendor_id);
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",
@@ -145,8 +364,15 @@ 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;
@@ -156,6 +382,9 @@ 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;
@@ -167,12 +396,15 @@ 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", 0 },
+ { "max14577", MAXIM_DEVICE_TYPE_MAX14577, },
+ { "max77836", MAXIM_DEVICE_TYPE_MAX77836, },
{ }
};
MODULE_DEVICE_TABLE(i2c, max14577_i2c_id);
@@ -183,20 +415,18 @@ static int max14577_suspend(struct device *dev)
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
struct max14577 *max14577 = i2c_get_clientdata(i2c);
- if (device_may_wakeup(dev)) {
+ if (device_may_wakeup(dev))
enable_irq_wake(max14577->irq);
- /*
- * MUIC IRQ must be disabled during suspend if this is
- * a wake up source because it will be handled before
- * resuming I2C.
- *
- * When device is woken up from suspend (e.g. by ADC change),
- * an interrupt occurs before resuming I2C bus controller.
- * Interrupt handler tries to read registers but this read
- * will fail because I2C is still suspended.
- */
- disable_irq(max14577->irq);
- }
+ /*
+ * MUIC IRQ must be disabled during suspend because if it happens
+ * while suspended it will be handled before resuming I2C.
+ *
+ * When device is woken up from suspend (e.g. by ADC change),
+ * an interrupt occurs before resuming I2C bus controller.
+ * Interrupt handler tries to read registers but this read
+ * will fail because I2C is still suspended.
+ */
+ disable_irq(max14577->irq);
return 0;
}
@@ -206,20 +436,14 @@ static int max14577_resume(struct device *dev)
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
struct max14577 *max14577 = i2c_get_clientdata(i2c);
- if (device_may_wakeup(dev)) {
+ if (device_may_wakeup(dev))
disable_irq_wake(max14577->irq);
- enable_irq(max14577->irq);
- }
+ enable_irq(max14577->irq);
return 0;
}
#endif /* CONFIG_PM_SLEEP */
-static struct of_device_id max14577_dt_match[] = {
- { .compatible = "maxim,max14577", },
- {},
-};
-
static SIMPLE_DEV_PM_OPS(max14577_pm, max14577_suspend, max14577_resume);
static struct i2c_driver max14577_i2c_driver = {
@@ -236,6 +460,9 @@ static struct i2c_driver max14577_i2c_driver = {
static int __init max14577_i2c_init(void)
{
+ BUILD_BUG_ON(ARRAY_SIZE(max14577_i2c_id) != MAXIM_DEVICE_TYPE_NUM);
+ BUILD_BUG_ON(ARRAY_SIZE(max14577_dt_match) != MAXIM_DEVICE_TYPE_NUM);
+
return i2c_add_driver(&max14577_i2c_driver);
}
subsys_initcall(max14577_i2c_init);
@@ -247,5 +474,5 @@ 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");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 18:14:46 +0100