diff options
Diffstat (limited to 'drivers/mfd/max77620.c')
| -rw-r--r-- | drivers/mfd/max77620.c | 143 |
1 files changed, 118 insertions, 25 deletions
diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c index d8ddd1a6f304..3af2974b3023 100644 --- a/drivers/mfd/max77620.c +++ b/drivers/mfd/max77620.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Maxim MAX77620 MFD Driver * @@ -7,10 +8,6 @@ * Laxman Dewangan <ldewangan@nvidia.com> * Chaitanya Bandi <bandik@nvidia.com> * Mallikarjun Kasoju <mkasoju@nvidia.com> - * - * 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. */ /****************** Teminology used in driver ******************** @@ -32,11 +29,13 @@ #include <linux/mfd/core.h> #include <linux/mfd/max77620.h> #include <linux/init.h> +#include <linux/module.h> #include <linux/of.h> -#include <linux/of_device.h> #include <linux/regmap.h> #include <linux/slab.h> +static struct max77620_chip *max77620_scratch; + static const struct resource gpio_resources[] = { DEFINE_RES_IRQ(MAX77620_IRQ_TOP_GPIO), }; @@ -111,6 +110,26 @@ static const struct mfd_cell max20024_children[] = { }, }; +static const struct mfd_cell max77663_children[] = { + { .name = "max77620-pinctrl", }, + { .name = "max77620-clock", }, + { .name = "max77663-pmic", }, + { .name = "max77620-watchdog", }, + { + .name = "max77620-gpio", + .resources = gpio_resources, + .num_resources = ARRAY_SIZE(gpio_resources), + }, { + .name = "max77620-rtc", + .resources = rtc_resources, + .num_resources = ARRAY_SIZE(rtc_resources), + }, { + .name = "max77663-power", + .resources = power_resources, + .num_resources = ARRAY_SIZE(power_resources), + }, +}; + static const struct regmap_range max77620_readable_ranges[] = { regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_DVSSD4), }; @@ -154,10 +173,11 @@ static const struct regmap_config max77620_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = MAX77620_REG_DVSSD4 + 1, - .cache_type = REGCACHE_RBTREE, + .cache_type = REGCACHE_MAPLE, .rd_table = &max77620_readable_table, .wr_table = &max77620_writable_table, .volatile_table = &max77620_volatile_table, + .use_single_write = true, }; static const struct regmap_config max20024_regmap_config = { @@ -165,12 +185,41 @@ static const struct regmap_config max20024_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = MAX20024_REG_MAX_ADD + 1, - .cache_type = REGCACHE_RBTREE, + .cache_type = REGCACHE_MAPLE, .rd_table = &max20024_readable_table, .wr_table = &max77620_writable_table, .volatile_table = &max77620_volatile_table, }; +static const struct regmap_range max77663_readable_ranges[] = { + regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_CID5), +}; + +static const struct regmap_access_table max77663_readable_table = { + .yes_ranges = max77663_readable_ranges, + .n_yes_ranges = ARRAY_SIZE(max77663_readable_ranges), +}; + +static const struct regmap_range max77663_writable_ranges[] = { + regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_CID5), +}; + +static const struct regmap_access_table max77663_writable_table = { + .yes_ranges = max77663_writable_ranges, + .n_yes_ranges = ARRAY_SIZE(max77663_writable_ranges), +}; + +static const struct regmap_config max77663_regmap_config = { + .name = "power-slave", + .reg_bits = 8, + .val_bits = 8, + .max_register = MAX77620_REG_CID5 + 1, + .cache_type = REGCACHE_MAPLE, + .rd_table = &max77663_readable_table, + .wr_table = &max77663_writable_table, + .volatile_table = &max77620_volatile_table, +}; + /* * MAX77620 and MAX20024 has the following steps of the interrupt handling * for TOP interrupts: @@ -205,7 +254,7 @@ static int max77620_irq_global_unmask(void *irq_drv_data) return ret; } -static struct regmap_irq_chip max77620_top_irq_chip = { +static const struct regmap_irq_chip max77620_top_irq_chip = { .name = "max77620-top", .irqs = max77620_top_irqs, .num_irqs = ARRAY_SIZE(max77620_top_irqs), @@ -240,6 +289,9 @@ static int max77620_get_fps_period_reg_value(struct max77620_chip *chip, case MAX77620: fps_min_period = MAX77620_FPS_PERIOD_MIN_US; break; + case MAX77663: + fps_min_period = MAX20024_FPS_PERIOD_MIN_US; + break; default: return -EINVAL; } @@ -274,6 +326,9 @@ static int max77620_config_fps(struct max77620_chip *chip, case MAX77620: fps_max_period = MAX77620_FPS_PERIOD_MAX_US; break; + case MAX77663: + fps_max_period = MAX20024_FPS_PERIOD_MAX_US; + break; default: return -EINVAL; } @@ -346,7 +401,7 @@ static int max77620_config_fps(struct max77620_chip *chip, static int max77620_initialise_fps(struct max77620_chip *chip) { struct device *dev = chip->dev; - struct device_node *fps_np, *fps_child; + struct device_node *fps_np; u8 config; int fps_id; int ret; @@ -360,11 +415,14 @@ static int max77620_initialise_fps(struct max77620_chip *chip) if (!fps_np) goto skip_fps; - for_each_child_of_node(fps_np, fps_child) { + for_each_child_of_node_scoped(fps_np, fps_child) { ret = max77620_config_fps(chip, fps_child); - if (ret < 0) + if (ret < 0) { + of_node_put(fps_np); return ret; + } } + of_node_put(fps_np); config = chip->enable_global_lpm ? MAX77620_ONOFFCNFG2_SLP_LPM_MSK : 0; ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2, @@ -375,6 +433,9 @@ static int max77620_initialise_fps(struct max77620_chip *chip) } skip_fps: + if (chip->chip_id == MAX77663) + return 0; + /* Enable wake on EN0 pin */ ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2, MAX77620_ONOFFCNFG2_WK_EN0, @@ -423,13 +484,24 @@ static int max77620_read_es_version(struct max77620_chip *chip) return ret; } -static int max77620_probe(struct i2c_client *client, - const struct i2c_device_id *id) +static void max77620_pm_power_off(void) +{ + struct max77620_chip *chip = max77620_scratch; + + regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG1, + MAX77620_ONOFFCNFG1_SFT_RST, + MAX77620_ONOFFCNFG1_SFT_RST); +} + +static int max77620_probe(struct i2c_client *client) { + const struct i2c_device_id *id = i2c_client_get_device_id(client); const struct regmap_config *rmap_config; struct max77620_chip *chip; + struct regmap_irq_chip *chip_desc; const struct mfd_cell *mfd_cells; int n_mfd_cells; + bool pm_off; int ret; chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); @@ -437,8 +509,15 @@ static int max77620_probe(struct i2c_client *client, return -ENOMEM; i2c_set_clientdata(client, chip); + + chip_desc = devm_kmemdup(&client->dev, &max77620_top_irq_chip, + sizeof(max77620_top_irq_chip), + GFP_KERNEL); + if (!chip_desc) + return -ENOMEM; + chip_desc->irq_drv_data = chip; + chip->dev = &client->dev; - chip->irq_base = -1; chip->chip_irq = client->irq; chip->chip_id = (enum max77620_chip_id)id->driver_data; @@ -453,6 +532,11 @@ static int max77620_probe(struct i2c_client *client, n_mfd_cells = ARRAY_SIZE(max20024_children); rmap_config = &max20024_regmap_config; break; + case MAX77663: + mfd_cells = max77663_children; + n_mfd_cells = ARRAY_SIZE(max77663_children); + rmap_config = &max77663_regmap_config; + break; default: dev_err(chip->dev, "ChipID is invalid %d\n", chip->chip_id); return -EINVAL; @@ -469,11 +553,9 @@ static int max77620_probe(struct i2c_client *client, if (ret < 0) return ret; - max77620_top_irq_chip.irq_drv_data = chip; 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); + IRQF_ONESHOT | IRQF_SHARED, 0, + chip_desc, &chip->top_irq_data); if (ret < 0) { dev_err(chip->dev, "Failed to add regmap irq: %d\n", ret); return ret; @@ -491,10 +573,15 @@ static int max77620_probe(struct i2c_client *client, return ret; } + pm_off = of_device_is_system_power_controller(client->dev.of_node); + if (pm_off && !pm_power_off) { + max77620_scratch = chip; + pm_power_off = max77620_pm_power_off; + } + return 0; } -#ifdef CONFIG_PM_SLEEP static int max77620_set_fps_period(struct max77620_chip *chip, int fps_id, int time_period) { @@ -546,6 +633,9 @@ static int max77620_i2c_suspend(struct device *dev) return ret; } + if (chip->chip_id == MAX77663) + goto out; + /* Disable WK_EN0 */ ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2, MAX77620_ONOFFCNFG2_WK_EN0, 0); @@ -581,7 +671,7 @@ static int max77620_i2c_resume(struct device *dev) * For MAX20024: No need to configure WKEN0 on resume as * it is configured on Init. */ - if (chip->chip_id == MAX20024) + if (chip->chip_id == MAX20024 || chip->chip_id == MAX77663) goto out; /* Enable WK_EN0 */ @@ -598,24 +688,27 @@ out: return 0; } -#endif static const struct i2c_device_id max77620_id[] = { {"max77620", MAX77620}, {"max20024", MAX20024}, + {"max77663", MAX77663}, {}, }; -static const struct dev_pm_ops max77620_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(max77620_i2c_suspend, max77620_i2c_resume) -}; +static DEFINE_SIMPLE_DEV_PM_OPS(max77620_pm_ops, + max77620_i2c_suspend, max77620_i2c_resume); static struct i2c_driver max77620_driver = { .driver = { .name = "max77620", - .pm = &max77620_pm_ops, + .pm = pm_sleep_ptr(&max77620_pm_ops), }, .probe = max77620_probe, .id_table = max77620_id, }; builtin_i2c_driver(max77620_driver); + +MODULE_DESCRIPTION("Maxim Semiconductor MAX77620 and MAX20024 PMIC Support"); +MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); +MODULE_LICENSE("GPL"); |