Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0+
//
// Copyright (c) 2012 Samsung Electronics Co., Ltd
//              http://www.samsung.com
 
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/interrupt.h>
#include <linux/pm_runtime.h>
#include <linux/mutex.h>
#include <linux/mfd/core.h>
#include <linux/mfd/samsung/core.h>
#include <linux/mfd/samsung/irq.h>
#include <linux/mfd/samsung/s2mpa01.h>
#include <linux/mfd/samsung/s2mps11.h>
#include <linux/mfd/samsung/s2mps13.h>
#include <linux/mfd/samsung/s2mps14.h>
#include <linux/mfd/samsung/s2mps15.h>
#include <linux/mfd/samsung/s2mpu02.h>
#include <linux/mfd/samsung/s5m8763.h>
#include <linux/mfd/samsung/s5m8767.h>
#include <linux/regmap.h>
 
static const struct mfd_cell s5m8751_devs[] = {
<------>{ .name = "s5m8751-pmic", },
<------>{ .name = "s5m-charger", },
<------>{ .name = "s5m8751-codec", },
};
 
static const struct mfd_cell s5m8763_devs[] = {
<------>{ .name = "s5m8763-pmic", },
<------>{ .name = "s5m-rtc", },
<------>{ .name = "s5m-charger", },
};
 
static const struct mfd_cell s5m8767_devs[] = {
<------>{ .name = "s5m8767-pmic", },
<------>{ .name = "s5m-rtc", },
<------>{
<------><------>.name = "s5m8767-clk",
<------><------>.of_compatible = "samsung,s5m8767-clk",
<------>},
};
 
static const struct mfd_cell s2mps11_devs[] = {
<------>{ .name = "s2mps11-regulator", },
<------>{ .name = "s2mps14-rtc", },
<------>{
<------><------>.name = "s2mps11-clk",
<------><------>.of_compatible = "samsung,s2mps11-clk",
<------>},
};
 
static const struct mfd_cell s2mps13_devs[] = {
<------>{ .name = "s2mps13-regulator", },
<------>{ .name = "s2mps13-rtc", },
<------>{
<------><------>.name = "s2mps13-clk",
<------><------>.of_compatible = "samsung,s2mps13-clk",
<------>},
};
 
static const struct mfd_cell s2mps14_devs[] = {
<------>{ .name = "s2mps14-regulator", },
<------>{ .name = "s2mps14-rtc", },
<------>{
<------><------>.name = "s2mps14-clk",
<------><------>.of_compatible = "samsung,s2mps14-clk",
<------>},
};
 
static const struct mfd_cell s2mps15_devs[] = {
<------>{ .name = "s2mps15-regulator", },
<------>{ .name = "s2mps15-rtc", },
<------>{
<------><------>.name = "s2mps13-clk",
<------><------>.of_compatible = "samsung,s2mps13-clk",
<------>},
};
 
static const struct mfd_cell s2mpa01_devs[] = {
<------>{ .name = "s2mpa01-pmic", },
<------>{ .name = "s2mps14-rtc", },
};
 
static const struct mfd_cell s2mpu02_devs[] = {
<------>{ .name = "s2mpu02-regulator", },
};
 
#ifdef CONFIG_OF
static const struct of_device_id sec_dt_match[] = {
<------>{
<------><------>.compatible = "samsung,s5m8767-pmic",
<------><------>.data = (void *)S5M8767X,
<------>}, {
<------><------>.compatible = "samsung,s2mps11-pmic",
<------><------>.data = (void *)S2MPS11X,
<------>}, {
<------><------>.compatible = "samsung,s2mps13-pmic",
<------><------>.data = (void *)S2MPS13X,
<------>}, {
<------><------>.compatible = "samsung,s2mps14-pmic",
<------><------>.data = (void *)S2MPS14X,
<------>}, {
<------><------>.compatible = "samsung,s2mps15-pmic",
<------><------>.data = (void *)S2MPS15X,
<------>}, {
<------><------>.compatible = "samsung,s2mpa01-pmic",
<------><------>.data = (void *)S2MPA01,
<------>}, {
<------><------>.compatible = "samsung,s2mpu02-pmic",
<------><------>.data = (void *)S2MPU02,
<------>}, {
<------><------>/* Sentinel */
<------>},
};
MODULE_DEVICE_TABLE(of, sec_dt_match);
#endif
 
static bool s2mpa01_volatile(struct device *dev, unsigned int reg)
{
<------>switch (reg) {
<------>case S2MPA01_REG_INT1M:
<------>case S2MPA01_REG_INT2M:
<------>case S2MPA01_REG_INT3M:
<------><------>return false;
<------>default:
<------><------>return true;
<------>}
}
 
static bool s2mps11_volatile(struct device *dev, unsigned int reg)
{
<------>switch (reg) {
<------>case S2MPS11_REG_INT1M:
<------>case S2MPS11_REG_INT2M:
<------>case S2MPS11_REG_INT3M:
<------><------>return false;
<------>default:
<------><------>return true;
<------>}
}
 
static bool s2mpu02_volatile(struct device *dev, unsigned int reg)
{
<------>switch (reg) {
<------>case S2MPU02_REG_INT1M:
<------>case S2MPU02_REG_INT2M:
<------>case S2MPU02_REG_INT3M:
<------><------>return false;
<------>default:
<------><------>return true;
<------>}
}
 
static bool s5m8763_volatile(struct device *dev, unsigned int reg)
{
<------>switch (reg) {
<------>case S5M8763_REG_IRQM1:
<------>case S5M8763_REG_IRQM2:
<------>case S5M8763_REG_IRQM3:
<------>case S5M8763_REG_IRQM4:
<------><------>return false;
<------>default:
<------><------>return true;
<------>}
}
 
static const struct regmap_config sec_regmap_config = {
<------>.reg_bits = 8,
<------>.val_bits = 8,
};
 
static const struct regmap_config s2mpa01_regmap_config = {
<------>.reg_bits = 8,
<------>.val_bits = 8,
 
<------>.max_register = S2MPA01_REG_LDO_OVCB4,
<------>.volatile_reg = s2mpa01_volatile,
<------>.cache_type = REGCACHE_FLAT,
};
 
static const struct regmap_config s2mps11_regmap_config = {
<------>.reg_bits = 8,
<------>.val_bits = 8,
 
<------>.max_register = S2MPS11_REG_L38CTRL,
<------>.volatile_reg = s2mps11_volatile,
<------>.cache_type = REGCACHE_FLAT,
};
 
static const struct regmap_config s2mps13_regmap_config = {
<------>.reg_bits = 8,
<------>.val_bits = 8,
 
<------>.max_register = S2MPS13_REG_LDODSCH5,
<------>.volatile_reg = s2mps11_volatile,
<------>.cache_type = REGCACHE_FLAT,
};
 
static const struct regmap_config s2mps14_regmap_config = {
<------>.reg_bits = 8,
<------>.val_bits = 8,
 
<------>.max_register = S2MPS14_REG_LDODSCH3,
<------>.volatile_reg = s2mps11_volatile,
<------>.cache_type = REGCACHE_FLAT,
};
 
static const struct regmap_config s2mps15_regmap_config = {
<------>.reg_bits = 8,
<------>.val_bits = 8,
 
<------>.max_register = S2MPS15_REG_LDODSCH4,
<------>.volatile_reg = s2mps11_volatile,
<------>.cache_type = REGCACHE_FLAT,
};
 
static const struct regmap_config s2mpu02_regmap_config = {
<------>.reg_bits = 8,
<------>.val_bits = 8,
 
<------>.max_register = S2MPU02_REG_DVSDATA,
<------>.volatile_reg = s2mpu02_volatile,
<------>.cache_type = REGCACHE_FLAT,
};
 
static const struct regmap_config s5m8763_regmap_config = {
<------>.reg_bits = 8,
<------>.val_bits = 8,
 
<------>.max_register = S5M8763_REG_LBCNFG2,
<------>.volatile_reg = s5m8763_volatile,
<------>.cache_type = REGCACHE_FLAT,
};
 
static const struct regmap_config s5m8767_regmap_config = {
<------>.reg_bits = 8,
<------>.val_bits = 8,
 
<------>.max_register = S5M8767_REG_LDO28CTRL,
<------>.volatile_reg = s2mps11_volatile,
<------>.cache_type = REGCACHE_FLAT,
};
 
static void sec_pmic_dump_rev(struct sec_pmic_dev *sec_pmic)
{
<------>unsigned int val;
 
<------>/* For each device type, the REG_ID is always the first register */
<------>if (!regmap_read(sec_pmic->regmap_pmic, S2MPS11_REG_ID, &val))
<------><------>dev_dbg(sec_pmic->dev, "Revision: 0x%x\n", val);
}
 
static void sec_pmic_configure(struct sec_pmic_dev *sec_pmic)
{
<------>int err;
 
<------>if (sec_pmic->device_type != S2MPS13X)
<------><------>return;
 
<------>if (sec_pmic->pdata->disable_wrstbi) {
<------><------>/*
<------><------> * If WRSTBI pin is pulled down this feature must be disabled
<------><------> * because each Suspend to RAM will trigger buck voltage reset
<------><------> * to default values.
<------><------> */
<------><------>err = regmap_update_bits(sec_pmic->regmap_pmic,
<------><------><------><------><------> S2MPS13_REG_WRSTBI,
<------><------><------><------><------> S2MPS13_REG_WRSTBI_MASK, 0x0);
<------><------>if (err)
<------><------><------>dev_warn(sec_pmic->dev,
<------><------><------><------> "Cannot initialize WRSTBI config: %d\n",
<------><------><------><------> err);
<------>}
}
 
#ifdef CONFIG_OF
/*
 * Only the common platform data elements for s5m8767 are parsed here from the
 * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
 * others have to parse their own platform data elements from device tree.
 *
 * The s5m8767 platform data structure is instantiated here and the drivers for
 * the sub-modules need not instantiate another instance while parsing their
 * platform data.
 */
static struct sec_platform_data *
sec_pmic_i2c_parse_dt_pdata(struct device *dev)
{
<------>struct sec_platform_data *pd;
 
<------>pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
<------>if (!pd)
<------><------>return ERR_PTR(-ENOMEM);
 
<------>/*
<------> * ToDo: the 'wakeup' member in the platform data is more of a linux
<------> * specfic information. Hence, there is no binding for that yet and
<------> * not parsed here.
<------> */
 
<------>pd->manual_poweroff = of_property_read_bool(dev->of_node,
<------><------><------><------><------><------>"samsung,s2mps11-acokb-ground");
<------>pd->disable_wrstbi = of_property_read_bool(dev->of_node,
<------><------><------><------><------><------>"samsung,s2mps11-wrstbi-ground");
<------>return pd;
}
#else
static struct sec_platform_data *
sec_pmic_i2c_parse_dt_pdata(struct device *dev)
{
<------>return NULL;
}
#endif
 
static inline unsigned long sec_i2c_get_driver_data(struct i2c_client *i2c,
<------><------><------><------><------><------>const struct i2c_device_id *id)
{
#ifdef CONFIG_OF
<------>if (i2c->dev.of_node) {
<------><------>const struct of_device_id *match;
 
<------><------>match = of_match_node(sec_dt_match, i2c->dev.of_node);
<------><------>return (unsigned long)match->data;
<------>}
#endif
<------>return id->driver_data;
}
 
static int sec_pmic_probe(struct i2c_client *i2c,
<------><------><------>    const struct i2c_device_id *id)
{
<------>struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev);
<------>const struct regmap_config *regmap;
<------>const struct mfd_cell *sec_devs;
<------>struct sec_pmic_dev *sec_pmic;
<------>unsigned long device_type;
<------>int ret, num_sec_devs;
 
<------>sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
<------><------><------><------>GFP_KERNEL);
<------>if (sec_pmic == NULL)
<------><------>return -ENOMEM;
 
<------>i2c_set_clientdata(i2c, sec_pmic);
<------>sec_pmic->dev = &i2c->dev;
<------>sec_pmic->i2c = i2c;
<------>sec_pmic->irq = i2c->irq;
<------>device_type = sec_i2c_get_driver_data(i2c, id);
 
<------>if (sec_pmic->dev->of_node) {
<------><------>pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev);
<------><------>if (IS_ERR(pdata)) {
<------><------><------>ret = PTR_ERR(pdata);
<------><------><------>return ret;
<------><------>}
<------><------>pdata->device_type = device_type;
<------>}
<------>if (pdata) {
<------><------>sec_pmic->device_type = pdata->device_type;
<------><------>sec_pmic->irq_base = pdata->irq_base;
<------><------>sec_pmic->wakeup = pdata->wakeup;
<------><------>sec_pmic->pdata = pdata;
<------>}
 
<------>switch (sec_pmic->device_type) {
<------>case S2MPA01:
<------><------>regmap = &s2mpa01_regmap_config;
<------><------>break;
<------>case S2MPS11X:
<------><------>regmap = &s2mps11_regmap_config;
<------><------>break;
<------>case S2MPS13X:
<------><------>regmap = &s2mps13_regmap_config;
<------><------>break;
<------>case S2MPS14X:
<------><------>regmap = &s2mps14_regmap_config;
<------><------>break;
<------>case S2MPS15X:
<------><------>regmap = &s2mps15_regmap_config;
<------><------>break;
<------>case S5M8763X:
<------><------>regmap = &s5m8763_regmap_config;
<------><------>break;
<------>case S5M8767X:
<------><------>regmap = &s5m8767_regmap_config;
<------><------>break;
<------>case S2MPU02:
<------><------>regmap = &s2mpu02_regmap_config;
<------><------>break;
<------>default:
<------><------>regmap = &sec_regmap_config;
<------><------>break;
<------>}
 
<------>sec_pmic->regmap_pmic = devm_regmap_init_i2c(i2c, regmap);
<------>if (IS_ERR(sec_pmic->regmap_pmic)) {
<------><------>ret = PTR_ERR(sec_pmic->regmap_pmic);
<------><------>dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
<------><------><------>ret);
<------><------>return ret;
<------>}
 
<------>if (pdata && pdata->cfg_pmic_irq)
<------><------>pdata->cfg_pmic_irq();
 
<------>sec_irq_init(sec_pmic);
 
<------>pm_runtime_set_active(sec_pmic->dev);
 
<------>switch (sec_pmic->device_type) {
<------>case S5M8751X:
<------><------>sec_devs = s5m8751_devs;
<------><------>num_sec_devs = ARRAY_SIZE(s5m8751_devs);
<------><------>break;
<------>case S5M8763X:
<------><------>sec_devs = s5m8763_devs;
<------><------>num_sec_devs = ARRAY_SIZE(s5m8763_devs);
<------><------>break;
<------>case S5M8767X:
<------><------>sec_devs = s5m8767_devs;
<------><------>num_sec_devs = ARRAY_SIZE(s5m8767_devs);
<------><------>break;
<------>case S2MPA01:
<------><------>sec_devs = s2mpa01_devs;
<------><------>num_sec_devs = ARRAY_SIZE(s2mpa01_devs);
<------><------>break;
<------>case S2MPS11X:
<------><------>sec_devs = s2mps11_devs;
<------><------>num_sec_devs = ARRAY_SIZE(s2mps11_devs);
<------><------>break;
<------>case S2MPS13X:
<------><------>sec_devs = s2mps13_devs;
<------><------>num_sec_devs = ARRAY_SIZE(s2mps13_devs);
<------><------>break;
<------>case S2MPS14X:
<------><------>sec_devs = s2mps14_devs;
<------><------>num_sec_devs = ARRAY_SIZE(s2mps14_devs);
<------><------>break;
<------>case S2MPS15X:
<------><------>sec_devs = s2mps15_devs;
<------><------>num_sec_devs = ARRAY_SIZE(s2mps15_devs);
<------><------>break;
<------>case S2MPU02:
<------><------>sec_devs = s2mpu02_devs;
<------><------>num_sec_devs = ARRAY_SIZE(s2mpu02_devs);
<------><------>break;
<------>default:
<------><------>dev_err(&i2c->dev, "Unsupported device type (%lu)\n",
<------><------><------>sec_pmic->device_type);
<------><------>return -ENODEV;
<------>}
<------>ret = devm_mfd_add_devices(sec_pmic->dev, -1, sec_devs, num_sec_devs,
<------><------><------><------>   NULL, 0, NULL);
<------>if (ret)
<------><------>return ret;
 
<------>device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup);
<------>sec_pmic_configure(sec_pmic);
<------>sec_pmic_dump_rev(sec_pmic);
 
<------>return ret;
}
 
static void sec_pmic_shutdown(struct i2c_client *i2c)
{
<------>struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
<------>unsigned int reg, mask;
 
<------>if (!sec_pmic->pdata->manual_poweroff)
<------><------>return;
 
<------>switch (sec_pmic->device_type) {
<------>case S2MPS11X:
<------><------>reg = S2MPS11_REG_CTRL1;
<------><------>mask = S2MPS11_CTRL1_PWRHOLD_MASK;
<------><------>break;
<------>default:
<------><------>/*
<------><------> * Currently only one board with S2MPS11 needs this, so just
<------><------> * ignore the rest.
<------><------> */
<------><------>dev_warn(sec_pmic->dev,
<------><------><------>"Unsupported device %lu for manual power off\n",
<------><------><------>sec_pmic->device_type);
<------><------>return;
<------>}
 
<------>regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, 0);
}
 
#ifdef CONFIG_PM_SLEEP
static int sec_pmic_suspend(struct device *dev)
{
<------>struct i2c_client *i2c = to_i2c_client(dev);
<------>struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
 
<------>if (device_may_wakeup(dev))
<------><------>enable_irq_wake(sec_pmic->irq);
<------>/*
<------> * PMIC IRQ must be disabled during suspend for RTC alarm
<------> * to work properly.
<------> * When device is woken up from suspend, an
<------> * interrupt occurs before resuming I2C bus controller.
<------> * The interrupt is handled by regmap_irq_thread which tries
<------> * to read RTC registers. This read fails (I2C is still
<------> * suspended) and RTC Alarm interrupt is disabled.
<------> */
<------>disable_irq(sec_pmic->irq);
 
<------>return 0;
}
 
static int sec_pmic_resume(struct device *dev)
{
<------>struct i2c_client *i2c = to_i2c_client(dev);
<------>struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
 
<------>if (device_may_wakeup(dev))
<------><------>disable_irq_wake(sec_pmic->irq);
<------>enable_irq(sec_pmic->irq);
 
<------>return 0;
}
#endif /* CONFIG_PM_SLEEP */
 
static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume);
 
static const struct i2c_device_id sec_pmic_id[] = {
<------>{ "sec_pmic", 0 },
<------>{ }
};
MODULE_DEVICE_TABLE(i2c, sec_pmic_id);
 
static struct i2c_driver sec_pmic_driver = {
<------>.driver = {
<------><------>   .name = "sec_pmic",
<------><------>   .pm = &sec_pmic_pm_ops,
<------><------>   .of_match_table = of_match_ptr(sec_dt_match),
<------>},
<------>.probe = sec_pmic_probe,
<------>.shutdown = sec_pmic_shutdown,
<------>.id_table = sec_pmic_id,
};
 
static int __init sec_pmic_init(void)
{
<------>return i2c_add_driver(&sec_pmic_driver);
}
 
subsys_initcall(sec_pmic_init);
 
static void __exit sec_pmic_exit(void)
{
<------>i2c_del_driver(&sec_pmic_driver);
}
module_exit(sec_pmic_exit);
 
MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
MODULE_DESCRIPTION("Core support for the S5M MFD");
MODULE_LICENSE("GPL");