[PATCH V10 2/6] mfd: max77620: add core driver for MAX77620/MAX20024

From: Laxman Dewangan
Date: Wed Mar 30 2016 - 10:41:44 EST

MAX77620/MAX20024 are Power Management IC from the MAXIM.
It supports RTC, multiple GPIOs, multiple DCDC and LDOs,
watchdog, clock etc.

Add MFD drier to provides common support for accessing the
device; additional drivers is developed on respected subsystem
in order to use the functionality of the device.

Signed-off-by: Laxman Dewangan <ldewangan@xxxxxxxxxx>
Signed-off-by: Mallikarjun Kasoju <mkasoju@xxxxxxxxxx>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>

---
Changes from V1:
- Code cleanups per review from V1.
- Move register acccess APIs from header to c file.
- Remove some of non required variable, remove duplication in error message
and simplify some of function implementation.
- Register RTC driver such that it can get the regmap handle form parent device

Changes from V2:
- Run coccicheck and checkpatch in strict mode for the alignment.
- Drop RTC driver and its i2c client registration.

Changes from V3:
- Change all sys initcall to module driver.
- change the max77620_read argument to unisgned int from u8.

Changes from V4:
- Take care of fps nodes.
- Drop the battery charger and low battery binding and related code as
it need to go on power driver.

Changes from V5:
-None

Changes from V6:
- Taken care of Lee's comment like used defines for irqs, remove max77620
register accesss abstractions, remove DTof module and use ID table only,
reduce the copyright lines.
- Drop configuration for hard power off time chnage as it will be in
power driver.
- Use direct regmap from all drivers instead of using abstractions.
- This depends on patch

Change from V7:
- Use MFD defines for making mfd cells.
- Use new property name.

Changes from V8:
- Remove the usage of MFD defines. Remove mutex_config as not needed.

Changes from V9:
- Use the devm_regmap_add_irq_chip() for irq registration.

drivers/mfd/Kconfig | 15 ++
drivers/mfd/Makefile | 1 +
drivers/mfd/max77620.c | 544 +++++++++++++++++++++++++++++++++++++++++++
include/linux/mfd/max77620.h | 337 +++++++++++++++++++++++++++
4 files changed, 897 insertions(+)
create mode 100644 drivers/mfd/max77620.c
create mode 100644 include/linux/mfd/max77620.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index eea61e3..585d6e3 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -527,6 +527,21 @@ config MFD_MAX14577
additional drivers must be enabled in order to use the functionality
of the device.

+config MFD_MAX77620
+ bool "Maxim Semiconductor MAX77620 and MAX20024 PMIC Support"
+ depends on I2C=y
+ depends on OF
+ select MFD_CORE
+ select REGMAP_I2C
+ select REGMAP_IRQ
+ select IRQ_DOMAIN
+ help
+ Say yes here to add support for Maxim Semiconductor MAX77620 and
+ MAX20024 which are Power Management IC with General purpose pins,
+ RTC, regulators, clock generator, watchdog etc. This driver
+ provides common support for accessing the device; additional drivers
+ must be enabled in order to use the functionality of the device.
+
config MFD_MAX77686
tristate "Maxim Semiconductor MAX77686/802 PMIC Support"
depends on I2C
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 5eaa6465d..921a08d 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -128,6 +128,7 @@ obj-$(CONFIG_MFD_DA9063) += da9063.o
obj-$(CONFIG_MFD_DA9150) += da9150-core.o

obj-$(CONFIG_MFD_MAX14577) += max14577.o
+obj-$(CONFIG_MFD_MAX77620) += max77620.o
obj-$(CONFIG_MFD_MAX77686) += max77686.o
obj-$(CONFIG_MFD_MAX77693) += max77693.o
obj-$(CONFIG_MFD_MAX77843) += max77843.o
diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c
new file mode 100644
index 0000000..41daaf7
--- /dev/null
+++ b/drivers/mfd/max77620.c
@@ -0,0 +1,544 @@
+/*
+ * Maxim MAX77620 MFD Driver
+ *
+ * Copyright (C) 2016 NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author:
+ * Laxman Dewangan <ldewangan@xxxxxxxxxx>
+ * Chaitanya Bandi <bandik@xxxxxxxxxx>
+ * Mallikarjun Kasoju <mkasoju@xxxxxxxxxx>
+ *
+ * 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.
+ */
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max77620.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+static struct resource gpio_resources[] = {
+ DEFINE_RES_IRQ(MAX77620_IRQ_TOP_GPIO),
+};
+
+static struct resource power_resources[] = {
+ DEFINE_RES_IRQ(MAX77620_IRQ_LBT_MBATLOW),
+};
+
+static struct resource rtc_resources[] = {
+ DEFINE_RES_IRQ(MAX77620_IRQ_TOP_RTC),
+};
+
+static struct resource thermal_resources[] = {
+ DEFINE_RES_IRQ(MAX77620_IRQ_LBT_TJALRM1),
+ DEFINE_RES_IRQ(MAX77620_IRQ_LBT_TJALRM2),
+};
+
+static const struct regmap_irq max77620_top_irqs[] = {
+ REGMAP_IRQ_REG(MAX77620_IRQ_TOP_GLBL, 0, MAX77620_IRQ_TOP_GLBL_MASK),
+ REGMAP_IRQ_REG(MAX77620_IRQ_TOP_SD, 0, MAX77620_IRQ_TOP_SD_MASK),
+ REGMAP_IRQ_REG(MAX77620_IRQ_TOP_LDO, 0, MAX77620_IRQ_TOP_LDO_MASK),
+ REGMAP_IRQ_REG(MAX77620_IRQ_TOP_GPIO, 0, MAX77620_IRQ_TOP_GPIO_MASK),
+ REGMAP_IRQ_REG(MAX77620_IRQ_TOP_RTC, 0, MAX77620_IRQ_TOP_RTC_MASK),
+ REGMAP_IRQ_REG(MAX77620_IRQ_TOP_32K, 0, MAX77620_IRQ_TOP_32K_MASK),
+ REGMAP_IRQ_REG(MAX77620_IRQ_TOP_ONOFF, 0, MAX77620_IRQ_TOP_ONOFF_MASK),
+ REGMAP_IRQ_REG(MAX77620_IRQ_LBT_MBATLOW, 1, MAX77620_IRQ_LBM_MASK),
+ REGMAP_IRQ_REG(MAX77620_IRQ_LBT_TJALRM1, 1, MAX77620_IRQ_TJALRM1_MASK),
+ REGMAP_IRQ_REG(MAX77620_IRQ_LBT_TJALRM2, 1, MAX77620_IRQ_TJALRM2_MASK),
+};
+
+#define MAX77620_MFD_CELL_NAME(_name) \
+ { \
+ .name = (_name), \
+ }
+
+#define MAX77620_MFD_CELL_RES(_name, _res) \
+ { \
+ .name = (_name), \
+ .resources = (_res), \
+ .num_resources = ARRAY_SIZE((_res)), \
+ }
+
+static struct mfd_cell max77620_children[] = {
+ MAX77620_MFD_CELL_NAME("max77620-pinctrl"),
+ MAX77620_MFD_CELL_RES("max77620-gpio", gpio_resources),
+ MAX77620_MFD_CELL_NAME("max77620-pmic"),
+ MAX77620_MFD_CELL_RES("max77620-rtc", rtc_resources),
+ MAX77620_MFD_CELL_RES("max77620-power", power_resources),
+ MAX77620_MFD_CELL_NAME("max77620-watchdog"),
+ MAX77620_MFD_CELL_NAME("max77620-clock"),
+ MAX77620_MFD_CELL_RES("max77620-thermal", thermal_resources),
+};
+
+static struct mfd_cell max20024_children[] = {
+ MAX77620_MFD_CELL_NAME("max20024-pinctrl"),
+ MAX77620_MFD_CELL_RES("max20024-gpio", gpio_resources),
+ MAX77620_MFD_CELL_NAME("max20024-pmic"),
+ MAX77620_MFD_CELL_RES("max77620-rtc", rtc_resources),
+ MAX77620_MFD_CELL_RES("max20024-power", power_resources),
+ MAX77620_MFD_CELL_NAME("max20024-watchdog"),
+ MAX77620_MFD_CELL_NAME("max20024-clock"),
+};
+
+static struct regmap_irq_chip max77620_top_irq_chip = {
+ .name = "max77620-top",
+ .irqs = max77620_top_irqs,
+ .num_irqs = ARRAY_SIZE(max77620_top_irqs),
+ .num_regs = 2,
+ .status_base = MAX77620_REG_IRQTOP,
+ .mask_base = MAX77620_REG_IRQTOPM,
+};
+
+static const struct regmap_range max77620_readable_ranges[] = {
+ regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_DVSSD4),
+};
+
+static const struct regmap_access_table max77620_readable_table = {
+ .yes_ranges = max77620_readable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(max77620_readable_ranges),
+};
+
+static const struct regmap_range max20024_readable_ranges[] = {
+ regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_DVSSD4),
+ regmap_reg_range(MAX20024_REG_MAX_ADD, MAX20024_REG_MAX_ADD),
+};
+
+static const struct regmap_access_table max20024_readable_table = {
+ .yes_ranges = max20024_readable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(max20024_readable_ranges),
+};
+
+static const struct regmap_range max77620_writable_ranges[] = {
+ regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_DVSSD4),
+};
+
+static const struct regmap_access_table max77620_writable_table = {
+ .yes_ranges = max77620_writable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(max77620_writable_ranges),
+};
+
+static const struct regmap_range max77620_cacheable_ranges[] = {
+ regmap_reg_range(MAX77620_REG_SD0_CFG, MAX77620_REG_LDO_CFG3),
+ regmap_reg_range(MAX77620_REG_FPS_CFG0, MAX77620_REG_FPS_SD3),
+};
+
+static const struct regmap_access_table max77620_volatile_table = {
+ .no_ranges = max77620_cacheable_ranges,
+ .n_no_ranges = ARRAY_SIZE(max77620_cacheable_ranges),
+};
+
+static const struct regmap_config max77620_regmap_config = {
+ .name = "power-slave",
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = MAX77620_REG_DVSSD4 + 1,
+ .cache_type = REGCACHE_RBTREE,
+ .rd_table = &max77620_readable_table,
+ .wr_table = &max77620_writable_table,
+ .volatile_table = &max77620_volatile_table,
+};
+
+static const struct regmap_config max20024_regmap_config = {
+ .name = "power-slave",
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = MAX20024_REG_MAX_ADD + 1,
+ .cache_type = REGCACHE_RBTREE,
+ .rd_table = &max20024_readable_table,
+ .wr_table = &max77620_writable_table,
+ .volatile_table = &max77620_volatile_table,
+};
+
+static int max77620_get_fps_period_reg_value(struct max77620_chip *chip,
+ int tperiod)
+{
+ int base_fps_time = (chip->chip_id == MAX20024) ? 20 : 40;
+ int x, i;
+
+ for (i = 0; i < 0x7; i++) {
+ x = base_fps_time * BIT(i);
+ if (x >= tperiod)
+ return i;
+ }
+
+ return i;
+}
+
+static int max77620_config_fps(struct max77620_chip *chip,
+ struct device_node *fps_np)
+{
+ struct device *dev = chip->dev;
+ unsigned int mask = 0, config = 0;
+ u32 param_val;
+ int tperiod, fps_id;
+ int ret;
+ char fps_name[10];
+
+ for (fps_id = 0; fps_id < MAX77620_FPS_COUNT; fps_id++) {
+ sprintf(fps_name, "fps%d", fps_id);
+ if (!strcmp(fps_np->name, fps_name))
+ break;
+ }
+
+ if (fps_id == MAX77620_FPS_COUNT) {
+ dev_err(dev, "FPS node name %s is not valid\n", fps_np->name);
+ return -EINVAL;
+ }
+
+ ret = of_property_read_u32(fps_np, "maxim,shutdown-fps-time-period-us",
+ &param_val);
+ if (!ret) {
+ mask |= MAX77620_FPS_TIME_PERIOD_MASK;
+ chip->shutdown_fps_period[fps_id] = min(param_val, 5120U);
+ tperiod = max77620_get_fps_period_reg_value(chip,
+ chip->shutdown_fps_period[fps_id]);
+ config |= tperiod << MAX77620_FPS_TIME_PERIOD_SHIFT;
+ }
+
+ ret = of_property_read_u32(fps_np, "maxim,suspend-fps-time-period-us",
+ &param_val);
+ if (!ret)
+ chip->suspend_fps_period[fps_id] = min(param_val, 5120U);
+
+ ret = of_property_read_u32(fps_np, "maxim,fps-event-source",
+ &param_val);
+ if (!ret) {
+ if (param_val > 2) {
+ dev_err(dev, "FPS%d event-source invalid\n", fps_id);
+ return -EINVAL;
+ }
+ mask |= MAX77620_FPS_EN_SRC_MASK;
+ config |= param_val << MAX77620_FPS_EN_SRC_SHIFT;
+ if (param_val == 2) {
+ mask |= MAX77620_FPS_ENFPS_SW_MASK;
+ config |= MAX77620_FPS_ENFPS_SW;
+ }
+ }
+
+ if (!chip->sleep_enable && !chip->enable_global_lpm) {
+ ret = of_property_read_u32(fps_np,
+ "maxim,device-state-on-disabled-event",
+ &param_val);
+ if (!ret) {
+ if (param_val == 0)
+ chip->sleep_enable = true;
+ else if (param_val == 1)
+ chip->enable_global_lpm = true;
+ }
+ }
+
+ ret = regmap_update_bits(chip->rmap, MAX77620_REG_FPS_CFG0 + fps_id,
+ mask, config);
+ if (ret < 0) {
+ dev_err(dev, "Failed to Reg 0x%02x update: %d\n",
+ MAX77620_REG_FPS_CFG0 + fps_id, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int max77620_initialise_fps(struct max77620_chip *chip)
+{
+ struct device *dev = chip->dev;
+ struct device_node *fps_np, *fps_child;
+ u8 config;
+ int fps_id;
+ int ret;
+
+ for (fps_id = 0; fps_id < MAX77620_FPS_COUNT; fps_id++) {
+ chip->shutdown_fps_period[fps_id] = -1;
+ chip->suspend_fps_period[fps_id] = -1;
+ }
+
+ fps_np = of_get_child_by_name(dev->of_node, "fps");
+ if (!fps_np)
+ goto skip_fps;
+
+ for_each_child_of_node(fps_np, fps_child) {
+ ret = max77620_config_fps(chip, fps_child);
+ if (ret < 0)
+ return ret;
+ }
+
+ config = chip->enable_global_lpm ? MAX77620_ONOFFCNFG2_SLP_LPM_MSK : 0;
+ ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2,
+ MAX77620_ONOFFCNFG2_SLP_LPM_MSK, config);
+ if (ret < 0) {
+ dev_err(dev, "Failed to reg ONOFFCNFG2 update: %d\n", ret);
+ return ret;
+ }
+
+skip_fps:
+ /* Enable wake on EN0 pin */
+ ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2,
+ MAX77620_ONOFFCNFG2_WK_EN0,
+ MAX77620_ONOFFCNFG2_WK_EN0);
+ if (ret < 0) {
+ dev_err(dev, "Failed to reg ONOFFCNFG2 update: %d\n", ret);
+ return ret;
+ }
+
+ /* For MAX20024, SLPEN will be POR reset if CLRSE is b11 */
+ if ((chip->chip_id == MAX20024) && chip->sleep_enable) {
+ config = MAX77620_ONOFFCNFG1_SLPEN | MAX20024_ONOFFCNFG1_CLRSE;
+ ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG1,
+ config, config);
+ if (ret < 0) {
+ dev_err(dev, "Failed to reg ONOFFCNFG1 update: %d\n",
+ ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int max77620_read_es_version(struct max77620_chip *chip)
+{
+ unsigned int val;
+ u8 cid_val[6];
+ int i;
+ int ret;
+
+ for (i = MAX77620_REG_CID0; i <= MAX77620_REG_CID5; i++) {
+ ret = regmap_read(chip->rmap, i, &val);
+ if (ret < 0) {
+ dev_err(chip->dev, "Failed to reg CID%d read: %d\n",
+ i - MAX77620_REG_CID0, ret);
+ return ret;
+ }
+ dev_dbg(chip->dev, "CID%d: 0x%02x\n",
+ i - MAX77620_REG_CID0, val);
+ cid_val[i - MAX77620_REG_CID0] = val;
+ }
+
+ /* CID4 is OTP Version and CID5 is ES version */
+ dev_info(chip->dev, "PMIC Version OTP:0x%02X and ES:0x%X\n",
+ cid_val[4], MAX77620_CID5_DIDM(cid_val[5]));
+
+ return ret;
+}
+
+static int max77620_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ const struct regmap_config *rmap_config;
+ struct max77620_chip *chip;
+ struct mfd_cell *mfd_cells;
+ int n_mfd_cells;
+ int ret;
+
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, chip);
+ chip->dev = &client->dev;
+ chip->irq_base = -1;
+ chip->chip_irq = client->irq;
+ chip->chip_id = (enum max77620_chip_id)id->driver_data;
+
+ switch (chip->chip_id) {
+ case MAX77620:
+ mfd_cells = max77620_children;
+ n_mfd_cells = ARRAY_SIZE(max77620_children);
+ rmap_config = &max77620_regmap_config;
+ break;
+ case MAX20024:
+ mfd_cells = max20024_children;
+ n_mfd_cells = ARRAY_SIZE(max20024_children);
+ rmap_config = &max20024_regmap_config;
+ break;
+ default:
+ dev_err(chip->dev, "ChipID is invalid %d\n", chip->chip_id);
+ return -EINVAL;
+ }
+
+ chip->rmap = devm_regmap_init_i2c(client, rmap_config);
+ if (IS_ERR(chip->rmap)) {
+ ret = PTR_ERR(chip->rmap);
+ dev_err(chip->dev, "Failed to regmap init: %d\n", ret);
+ return ret;
+ }
+
+ ret = max77620_read_es_version(chip);
+ if (ret < 0)
+ return ret;
+
+ ret = devm_regmap_add_irq_chip(chip->dev, chip->rmap, client->irq,
+ IRQF_ONESHOT | IRQF_SHARED,
+ chip->irq_base, &max77620_top_irq_chip,
+ &chip->top_irq_data);
+ if (ret < 0) {
+ dev_err(chip->dev, "Failed to add regmap irq: %d\n", ret);
+ return ret;
+ }
+
+ ret = max77620_initialise_fps(chip);
+ if (ret < 0)
+ return ret;
+
+ ret = mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE,
+ mfd_cells, n_mfd_cells, NULL, 0,
+ regmap_irq_get_domain(chip->top_irq_data));
+ if (ret < 0) {
+ dev_err(chip->dev, "Failed to add sub devices: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int max77620_remove(struct i2c_client *client)
+{
+ struct max77620_chip *chip = i2c_get_clientdata(client);
+
+ mfd_remove_devices(chip->dev);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int max77620_set_fps_period(struct max77620_chip *chip,
+ int fps_id, int time_period)
+{
+ int period = max77620_get_fps_period_reg_value(chip, time_period);
+ int ret;
+
+ ret = regmap_update_bits(chip->rmap, MAX77620_REG_FPS_CFG0 + fps_id,
+ MAX77620_FPS_TIME_PERIOD_MASK,
+ period << MAX77620_FPS_TIME_PERIOD_SHIFT);
+ if (ret < 0) {
+ dev_err(chip->dev, "Failed to reg 0x%02x write: %d\n",
+ MAX77620_REG_FPS_CFG0 + fps_id, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int max77620_i2c_suspend(struct device *dev)
+{
+ struct max77620_chip *chip = dev_get_drvdata(dev);
+ struct i2c_client *client = to_i2c_client(dev);
+ unsigned int config;
+ int fps;
+ int ret;
+
+ for (fps = 0; fps < MAX77620_FPS_COUNT; fps++) {
+ if (chip->suspend_fps_period[fps] < 0)
+ continue;
+
+ ret = max77620_set_fps_period(chip, fps,
+ chip->suspend_fps_period[fps]);
+ if (ret < 0)
+ dev_err(dev, "Failed to FPS%d config: %d\n", fps, ret);
+ }
+
+ /*
+ * For MAX20024: No need to configure SLPEN on suspend as
+ * it will be configured on Init.
+ */
+ if (chip->chip_id == MAX20024)
+ goto out;
+
+ config = (chip->sleep_enable) ? MAX77620_ONOFFCNFG1_SLPEN : 0;
+ ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG1,
+ MAX77620_ONOFFCNFG1_SLPEN,
+ config);
+ if (ret < 0) {
+ dev_err(dev, "Failed to reg ONOFFCNFG1 update: %d\n", ret);
+ return ret;
+ }
+
+ /* Disable WK_EN0 */
+ ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2,
+ MAX77620_ONOFFCNFG2_WK_EN0, 0);
+ if (ret < 0) {
+ dev_err(dev, "Failed to reg ONOFFCNFG2 update: %d\n", ret);
+ return ret;
+ }
+
+out:
+ disable_irq(client->irq);
+
+ return 0;
+}
+
+static int max77620_i2c_resume(struct device *dev)
+{
+ struct max77620_chip *chip = dev_get_drvdata(dev);
+ struct i2c_client *client = to_i2c_client(dev);
+ int ret;
+ int fps;
+
+ for (fps = 0; fps < MAX77620_FPS_COUNT; fps++) {
+ if (chip->shutdown_fps_period[fps] < 0)
+ continue;
+
+ ret = max77620_set_fps_period(chip, fps,
+ chip->shutdown_fps_period[fps]);
+ if (ret < 0)
+ dev_err(dev, "Failed to FPS%d config: %d\n", fps, ret);
+ }
+
+ /*
+ * For MAX20024: No need to configure WKEN0 on resume as
+ * it is configured on Init.
+ */
+ if (chip->chip_id == MAX20024)
+ goto out;
+
+ /* Enable WK_EN0 */
+ ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2,
+ MAX77620_ONOFFCNFG2_WK_EN0,
+ MAX77620_ONOFFCNFG2_WK_EN0);
+ if (ret < 0) {
+ dev_err(dev, "Failed to reg ONOFFCNFG2 WK_EN0 update: %d\n",
+ ret);
+ return ret;
+ }
+
+out:
+ enable_irq(client->irq);
+
+ return 0;
+}
+#endif
+
+static const struct i2c_device_id max77620_id[] = {
+ {"max77620", MAX77620},
+ {"max20024", MAX20024},
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, max77620_id);
+
+static const struct dev_pm_ops max77620_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(max77620_i2c_suspend, max77620_i2c_resume)
+};
+
+static struct i2c_driver max77620_driver = {
+ .driver = {
+ .name = "max77620",
+ .pm = &max77620_pm_ops,
+ },
+ .probe = max77620_probe,
+ .remove = max77620_remove,
+ .id_table = max77620_id,
+};
+
+module_i2c_driver(max77620_driver);
+
+MODULE_DESCRIPTION("MAX77620/MAX20024 Multi Function Device Core Driver");
+MODULE_AUTHOR("Laxman Dewangan <ldewangan@xxxxxxxxxx>");
+MODULE_AUTHOR("Chaitanya Bandi <bandik@xxxxxxxxxx>");
+MODULE_AUTHOR("Mallikarjun Kasoju <mkasoju@xxxxxxxxxx>");
+MODULE_ALIAS("i2c:max77620");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/max77620.h b/include/linux/mfd/max77620.h
new file mode 100644
index 0000000..db34107
--- /dev/null
+++ b/include/linux/mfd/max77620.h
@@ -0,0 +1,337 @@
+/*
+ * Defining registers address and its bit definitions of MAX77620 and MAX20024
+ *
+ * Copyright (C) 2016 NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#ifndef _LINUX_MFD_MAX77620_H_
+#define _LINUX_MFD_MAX77620_H_
+
+#include <linux/types.h>
+
+/* GLOBAL, PMIC, GPIO, FPS, ONOFFC, CID Registers */
+#define MAX77620_REG_CNFGGLBL1 0x00
+#define MAX77620_REG_CNFGGLBL2 0x01
+#define MAX77620_REG_CNFGGLBL3 0x02
+#define MAX77620_REG_CNFG1_32K 0x03
+#define MAX77620_REG_CNFGBBC 0x04
+#define MAX77620_REG_IRQTOP 0x05
+#define MAX77620_REG_INTLBT 0x06
+#define MAX77620_REG_IRQSD 0x07
+#define MAX77620_REG_IRQ_LVL2_L0_7 0x08
+#define MAX77620_REG_IRQ_LVL2_L8 0x09
+#define MAX77620_REG_IRQ_LVL2_GPIO 0x0A
+#define MAX77620_REG_ONOFFIRQ 0x0B
+#define MAX77620_REG_NVERC 0x0C
+#define MAX77620_REG_IRQTOPM 0x0D
+#define MAX77620_REG_INTENLBT 0x0E
+#define MAX77620_REG_IRQMASKSD 0x0F
+#define MAX77620_REG_IRQ_MSK_L0_7 0x10
+#define MAX77620_REG_IRQ_MSK_L8 0x11
+#define MAX77620_REG_ONOFFIRQM 0x12
+#define MAX77620_REG_STATLBT 0x13
+#define MAX77620_REG_STATSD 0x14
+#define MAX77620_REG_ONOFFSTAT 0x15
+
+/* SD and LDO Registers */
+#define MAX77620_REG_SD0 0x16
+#define MAX77620_REG_SD1 0x17
+#define MAX77620_REG_SD2 0x18
+#define MAX77620_REG_SD3 0x19
+#define MAX77620_REG_SD4 0x1A
+#define MAX77620_REG_DVSSD0 0x1B
+#define MAX77620_REG_DVSSD1 0x1C
+#define MAX77620_REG_SD0_CFG 0x1D
+#define MAX77620_REG_SD1_CFG 0x1E
+#define MAX77620_REG_SD2_CFG 0x1F
+#define MAX77620_REG_SD3_CFG 0x20
+#define MAX77620_REG_SD4_CFG 0x21
+#define MAX77620_REG_SD_CFG2 0x22
+#define MAX77620_REG_LDO0_CFG 0x23
+#define MAX77620_REG_LDO0_CFG2 0x24
+#define MAX77620_REG_LDO1_CFG 0x25
+#define MAX77620_REG_LDO1_CFG2 0x26
+#define MAX77620_REG_LDO2_CFG 0x27
+#define MAX77620_REG_LDO2_CFG2 0x28
+#define MAX77620_REG_LDO3_CFG 0x29
+#define MAX77620_REG_LDO3_CFG2 0x2A
+#define MAX77620_REG_LDO4_CFG 0x2B
+#define MAX77620_REG_LDO4_CFG2 0x2C
+#define MAX77620_REG_LDO5_CFG 0x2D
+#define MAX77620_REG_LDO5_CFG2 0x2E
+#define MAX77620_REG_LDO6_CFG 0x2F
+#define MAX77620_REG_LDO6_CFG2 0x30
+#define MAX77620_REG_LDO7_CFG 0x31
+#define MAX77620_REG_LDO7_CFG2 0x32
+#define MAX77620_REG_LDO8_CFG 0x33
+#define MAX77620_REG_LDO8_CFG2 0x34
+#define MAX77620_REG_LDO_CFG3 0x35
+
+#define MAX77620_LDO_SLEW_RATE_MASK 0x1
+
+/* LDO Configuration 3 */
+#define MAX77620_TRACK4_MASK BIT(5)
+#define MAX77620_TRACK4_SHIFT 5
+
+/* Voltage */
+#define MAX77620_SDX_VOLT_MASK 0xFF
+#define MAX77620_SD0_VOLT_MASK 0x3F
+#define MAX77620_SD1_VOLT_MASK 0x7F
+#define MAX77620_LDO_VOLT_MASK 0x3F
+
+#define MAX77620_REG_GPIO0 0x36
+#define MAX77620_REG_GPIO1 0x37
+#define MAX77620_REG_GPIO2 0x38
+#define MAX77620_REG_GPIO3 0x39
+#define MAX77620_REG_GPIO4 0x3A
+#define MAX77620_REG_GPIO5 0x3B
+#define MAX77620_REG_GPIO6 0x3C
+#define MAX77620_REG_GPIO7 0x3D
+#define MAX77620_REG_PUE_GPIO 0x3E
+#define MAX77620_REG_PDE_GPIO 0x3F
+#define MAX77620_REG_AME_GPIO 0x40
+#define MAX77620_REG_ONOFFCNFG1 0x41
+#define MAX77620_REG_ONOFFCNFG2 0x42
+
+/* FPS Registers */
+#define MAX77620_REG_FPS_CFG0 0x43
+#define MAX77620_REG_FPS_CFG1 0x44
+#define MAX77620_REG_FPS_CFG2 0x45
+#define MAX77620_REG_FPS_LDO0 0x46
+#define MAX77620_REG_FPS_LDO1 0x47
+#define MAX77620_REG_FPS_LDO2 0x48
+#define MAX77620_REG_FPS_LDO3 0x49
+#define MAX77620_REG_FPS_LDO4 0x4A
+#define MAX77620_REG_FPS_LDO5 0x4B
+#define MAX77620_REG_FPS_LDO6 0x4C
+#define MAX77620_REG_FPS_LDO7 0x4D
+#define MAX77620_REG_FPS_LDO8 0x4E
+#define MAX77620_REG_FPS_SD0 0x4F
+#define MAX77620_REG_FPS_SD1 0x50
+#define MAX77620_REG_FPS_SD2 0x51
+#define MAX77620_REG_FPS_SD3 0x52
+#define MAX77620_REG_FPS_SD4 0x53
+#define MAX77620_REG_FPS_NONE 0
+
+#define MAX77620_FPS_SRC_MASK 0xC0
+#define MAX77620_FPS_SRC_SHIFT 6
+#define MAX77620_FPS_PU_PERIOD_MASK 0x38
+#define MAX77620_FPS_PU_PERIOD_SHIFT 3
+#define MAX77620_FPS_PD_PERIOD_MASK 0x07
+#define MAX77620_FPS_PD_PERIOD_SHIFT 0
+#define MAX77620_FPS_TIME_PERIOD_MASK 0x38
+#define MAX77620_FPS_TIME_PERIOD_SHIFT 3
+#define MAX77620_FPS_EN_SRC_MASK 0x06
+#define MAX77620_FPS_EN_SRC_SHIFT 1
+#define MAX77620_FPS_ENFPS_SW_MASK 0x01
+#define MAX77620_FPS_ENFPS_SW 0x01
+
+#define MAX77620_REG_FPS_GPIO1 0x54
+#define MAX77620_REG_FPS_GPIO2 0x55
+#define MAX77620_REG_FPS_GPIO3 0x56
+#define MAX77620_REG_FPS_RSO 0x57
+#define MAX77620_REG_CID0 0x58
+#define MAX77620_REG_CID1 0x59
+#define MAX77620_REG_CID2 0x5A
+#define MAX77620_REG_CID3 0x5B
+#define MAX77620_REG_CID4 0x5C
+#define MAX77620_REG_CID5 0x5D
+
+#define MAX77620_REG_DVSSD4 0x5E
+#define MAX20024_REG_MAX_ADD 0x70
+
+#define MAX77620_CID_DIDM_MASK 0xF0
+#define MAX77620_CID_DIDM_SHIFT 4
+
+/* CNCG2SD */
+#define MAX77620_SD_CNF2_ROVS_EN_SD1 BIT(1)
+#define MAX77620_SD_CNF2_ROVS_EN_SD0 BIT(2)
+
+/* Device Identification Metal */
+#define MAX77620_CID5_DIDM(n) (((n) >> 4) & 0xF)
+/* Device Indentification OTP */
+#define MAX77620_CID5_DIDO(n) ((n) & 0xF)
+
+/* SD CNFG1 */
+#define MAX77620_SD_SR_MASK 0xC0
+#define MAX77620_SD_SR_SHIFT 6
+#define MAX77620_SD_POWER_MODE_MASK 0x30
+#define MAX77620_SD_POWER_MODE_SHIFT 4
+#define MAX77620_SD_CFG1_ADE_MASK BIT(3)
+#define MAX77620_SD_CFG1_ADE_DISABLE 0
+#define MAX77620_SD_CFG1_ADE_ENABLE BIT(3)
+#define MAX77620_SD_FPWM_MASK 0x04
+#define MAX77620_SD_FPWM_SHIFT 2
+#define MAX77620_SD_FSRADE_MASK 0x01
+#define MAX77620_SD_FSRADE_SHIFT 0
+#define MAX77620_SD_CFG1_FPWM_SD_MASK BIT(2)
+#define MAX77620_SD_CFG1_FPWM_SD_SKIP 0
+#define MAX77620_SD_CFG1_FPWM_SD_FPWM BIT(2)
+#define MAX77620_SD_CFG1_FSRADE_SD_MASK BIT(0)
+#define MAX77620_SD_CFG1_FSRADE_SD_DISABLE 0
+#define MAX77620_SD_CFG1_FSRADE_SD_ENABLE BIT(0)
+
+/* LDO_CNFG2 */
+#define MAX77620_LDO_POWER_MODE_MASK 0xC0
+#define MAX77620_LDO_POWER_MODE_SHIFT 6
+#define MAX77620_LDO_CFG2_ADE_MASK BIT(1)
+#define MAX77620_LDO_CFG2_ADE_DISABLE 0
+#define MAX77620_LDO_CFG2_ADE_ENABLE BIT(1)
+#define MAX77620_LDO_CFG2_SS_MASK BIT(0)
+#define MAX77620_LDO_CFG2_SS_FAST BIT(0)
+#define MAX77620_LDO_CFG2_SS_SLOW 0
+
+#define MAX77620_IRQ_TOP_GLBL_MASK BIT(7)
+#define MAX77620_IRQ_TOP_SD_MASK BIT(6)
+#define MAX77620_IRQ_TOP_LDO_MASK BIT(5)
+#define MAX77620_IRQ_TOP_GPIO_MASK BIT(4)
+#define MAX77620_IRQ_TOP_RTC_MASK BIT(3)
+#define MAX77620_IRQ_TOP_32K_MASK BIT(2)
+#define MAX77620_IRQ_TOP_ONOFF_MASK BIT(1)
+
+#define MAX77620_IRQ_LBM_MASK BIT(3)
+#define MAX77620_IRQ_TJALRM1_MASK BIT(2)
+#define MAX77620_IRQ_TJALRM2_MASK BIT(1)
+
+#define MAX77620_PWR_I2C_ADDR 0x3c
+#define MAX77620_RTC_I2C_ADDR 0x68
+
+#define MAX77620_CNFG_GPIO_DRV_MASK BIT(0)
+#define MAX77620_CNFG_GPIO_DRV_PUSHPULL BIT(0)
+#define MAX77620_CNFG_GPIO_DRV_OPENDRAIN 0
+#define MAX77620_CNFG_GPIO_DIR_MASK BIT(1)
+#define MAX77620_CNFG_GPIO_DIR_INPUT BIT(1)
+#define MAX77620_CNFG_GPIO_DIR_OUTPUT 0
+#define MAX77620_CNFG_GPIO_INPUT_VAL_MASK BIT(2)
+#define MAX77620_CNFG_GPIO_OUTPUT_VAL_MASK BIT(3)
+#define MAX77620_CNFG_GPIO_OUTPUT_VAL_HIGH BIT(3)
+#define MAX77620_CNFG_GPIO_OUTPUT_VAL_LOW 0
+#define MAX77620_CNFG_GPIO_INT_MASK (0x3 << 4)
+#define MAX77620_CNFG_GPIO_INT_FALLING BIT(4)
+#define MAX77620_CNFG_GPIO_INT_RISING BIT(5)
+#define MAX77620_CNFG_GPIO_DBNC_MASK (0x3 << 6)
+#define MAX77620_CNFG_GPIO_DBNC_None (0x0 << 6)
+#define MAX77620_CNFG_GPIO_DBNC_8ms (0x1 << 6)
+#define MAX77620_CNFG_GPIO_DBNC_16ms (0x2 << 6)
+#define MAX77620_CNFG_GPIO_DBNC_32ms (0x3 << 6)
+
+#define MAX77620_IRQ_LVL2_GPIO_EDGE0 BIT(0)
+#define MAX77620_IRQ_LVL2_GPIO_EDGE1 BIT(1)
+#define MAX77620_IRQ_LVL2_GPIO_EDGE2 BIT(2)
+#define MAX77620_IRQ_LVL2_GPIO_EDGE3 BIT(3)
+#define MAX77620_IRQ_LVL2_GPIO_EDGE4 BIT(4)
+#define MAX77620_IRQ_LVL2_GPIO_EDGE5 BIT(5)
+#define MAX77620_IRQ_LVL2_GPIO_EDGE6 BIT(6)
+#define MAX77620_IRQ_LVL2_GPIO_EDGE7 BIT(7)
+
+#define MAX77620_CNFG1_32K_OUT0_EN BIT(2)
+
+#define MAX77620_ONOFFCNFG1_SFT_RST BIT(7)
+#define MAX77620_ONOFFCNFG1_MRT_MASK 0x38
+#define MAX77620_ONOFFCNFG1_MRT_SHIFT 0x3
+#define MAX77620_ONOFFCNFG1_SLPEN BIT(2)
+#define MAX77620_ONOFFCNFG1_PWR_OFF BIT(1)
+#define MAX20024_ONOFFCNFG1_CLRSE 0x18
+
+#define MAX77620_ONOFFCNFG2_SFT_RST_WK BIT(7)
+#define MAX77620_ONOFFCNFG2_WD_RST_WK BIT(6)
+#define MAX77620_ONOFFCNFG2_SLP_LPM_MSK BIT(5)
+#define MAX77620_ONOFFCNFG2_WK_ALARM1 BIT(2)
+#define MAX77620_ONOFFCNFG2_WK_EN0 BIT(0)
+
+#define MAX77620_GLBLM_MASK BIT(0)
+
+#define MAX77620_WDTC_MASK 0x3
+#define MAX77620_WDTOFFC BIT(4)
+#define MAX77620_WDTSLPC BIT(3)
+#define MAX77620_WDTEN BIT(2)
+
+#define MAX77620_TWD_MASK 0x3
+#define MAX77620_TWD_2s 0x0
+#define MAX77620_TWD_16s 0x1
+#define MAX77620_TWD_64s 0x2
+#define MAX77620_TWD_128s 0x3
+
+#define MAX77620_CNFGGLBL1_LBDAC_EN BIT(7)
+#define MAX77620_CNFGGLBL1_MPPLD BIT(6)
+#define MAX77620_CNFGGLBL1_LBHYST (BIT(5) | BIT(4))
+#define MAX77620_CNFGGLBL1_LBDAC 0x0E
+#define MAX77620_CNFGGLBL1_LBRSTEN BIT(0)
+
+/* CNFG BBC registers */
+#define MAX77620_CNFGBBC_ENABLE BIT(0)
+#define MAX77620_CNFGBBC_CURRENT_MASK 0x06
+#define MAX77620_CNFGBBC_CURRENT_SHIFT 1
+#define MAX77620_CNFGBBC_VOLTAGE_MASK 0x18
+#define MAX77620_CNFGBBC_VOLTAGE_SHIFT 3
+#define MAX77620_CNFGBBC_LOW_CURRENT_DISABLE BIT(5)
+#define MAX77620_CNFGBBC_RESISTOR_MASK 0xC0
+#define MAX77620_CNFGBBC_RESISTOR_SHIFT 6
+
+#define MAX77620_FPS_COUNT 3
+
+/* Interrupts */
+enum {
+ MAX77620_IRQ_TOP_GLBL, /* Low-Battery */
+ MAX77620_IRQ_TOP_SD, /* SD power fail */
+ MAX77620_IRQ_TOP_LDO, /* LDO power fail */
+ MAX77620_IRQ_TOP_GPIO, /* TOP GPIO internal int to MAX77620 */
+ MAX77620_IRQ_TOP_RTC, /* RTC */
+ MAX77620_IRQ_TOP_32K, /* 32kHz oscillator */
+ MAX77620_IRQ_TOP_ONOFF, /* ON/OFF oscillator */
+ MAX77620_IRQ_LBT_MBATLOW, /* Thermal alarm status, > 120C */
+ MAX77620_IRQ_LBT_TJALRM1, /* Thermal alarm status, > 120C */
+ MAX77620_IRQ_LBT_TJALRM2, /* Thermal alarm status, > 140C */
+};
+
+/* GPIOs */
+enum {
+ MAX77620_GPIO0,
+ MAX77620_GPIO1,
+ MAX77620_GPIO2,
+ MAX77620_GPIO3,
+ MAX77620_GPIO4,
+ MAX77620_GPIO5,
+ MAX77620_GPIO6,
+ MAX77620_GPIO7,
+ MAX77620_GPIO_NR,
+};
+
+/* FPS Source */
+enum max77620_fps_src {
+ MAX77620_FPS_SRC_0,
+ MAX77620_FPS_SRC_1,
+ MAX77620_FPS_SRC_2,
+ MAX77620_FPS_SRC_NONE,
+ MAX77620_FPS_SRC_DEF,
+};
+
+enum max77620_chip_id {
+ MAX77620,
+ MAX20024,
+};
+
+struct max77620_chip {
+ struct device *dev;
+ struct regmap *rmap;
+
+ int chip_irq;
+ int irq_base;
+
+ /* chip id */
+ enum max77620_chip_id chip_id;
+
+ bool sleep_enable;
+ bool enable_global_lpm;
+ int shutdown_fps_period[MAX77620_FPS_COUNT];
+ int suspend_fps_period[MAX77620_FPS_COUNT];
+
+ struct regmap_irq_chip_data *top_irq_data;
+ struct regmap_irq_chip_data *gpio_irq_data;
+};
+
+#endif /* _LINUX_MFD_MAX77620_H_ */
--
2.1.4