linux/drivers/mfd/rohm-bd9576.c
Rob Herring dc0c386e09 mfd: Explicitly include correct DT includes
The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230714174731.4059811-1-robh@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
2023-08-18 21:48:03 +01:00

188 lines
5.5 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2021 ROHM Semiconductors
*
* ROHM BD9576MUF and BD9573MUF PMIC driver
*/
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/irq.h>
#include <linux/mfd/core.h>
#include <linux/mfd/rohm-bd957x.h>
#include <linux/mfd/rohm-generic.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/types.h>
enum {
BD957X_REGULATOR_CELL,
BD957X_WDT_CELL,
};
/*
* Due to the BD9576MUF nasty IRQ behaviour we don't always populate IRQs.
* These will be added to regulator resources only if IRQ information for the
* PMIC is populated in device-tree.
*/
static const struct resource bd9576_regulator_irqs[] = {
DEFINE_RES_IRQ_NAMED(BD9576_INT_THERM, "bd9576-temp"),
DEFINE_RES_IRQ_NAMED(BD9576_INT_OVD, "bd9576-ovd"),
DEFINE_RES_IRQ_NAMED(BD9576_INT_UVD, "bd9576-uvd"),
};
static struct mfd_cell bd9573_mfd_cells[] = {
[BD957X_REGULATOR_CELL] = { .name = "bd9573-regulator", },
[BD957X_WDT_CELL] = { .name = "bd9576-wdt", },
};
static struct mfd_cell bd9576_mfd_cells[] = {
[BD957X_REGULATOR_CELL] = { .name = "bd9576-regulator", },
[BD957X_WDT_CELL] = { .name = "bd9576-wdt", },
};
static const struct regmap_range volatile_ranges[] = {
regmap_reg_range(BD957X_REG_SMRB_ASSERT, BD957X_REG_SMRB_ASSERT),
regmap_reg_range(BD957X_REG_PMIC_INTERNAL_STAT,
BD957X_REG_PMIC_INTERNAL_STAT),
regmap_reg_range(BD957X_REG_INT_THERM_STAT, BD957X_REG_INT_THERM_STAT),
regmap_reg_range(BD957X_REG_INT_OVP_STAT, BD957X_REG_INT_SYS_STAT),
regmap_reg_range(BD957X_REG_INT_MAIN_STAT, BD957X_REG_INT_MAIN_STAT),
};
static const struct regmap_access_table volatile_regs = {
.yes_ranges = &volatile_ranges[0],
.n_yes_ranges = ARRAY_SIZE(volatile_ranges),
};
static struct regmap_config bd957x_regmap = {
.reg_bits = 8,
.val_bits = 8,
.volatile_table = &volatile_regs,
.max_register = BD957X_MAX_REGISTER,
.cache_type = REGCACHE_RBTREE,
};
static struct regmap_irq bd9576_irqs[] = {
REGMAP_IRQ_REG(BD9576_INT_THERM, 0, BD957X_MASK_INT_MAIN_THERM),
REGMAP_IRQ_REG(BD9576_INT_OVP, 0, BD957X_MASK_INT_MAIN_OVP),
REGMAP_IRQ_REG(BD9576_INT_SCP, 0, BD957X_MASK_INT_MAIN_SCP),
REGMAP_IRQ_REG(BD9576_INT_OCP, 0, BD957X_MASK_INT_MAIN_OCP),
REGMAP_IRQ_REG(BD9576_INT_OVD, 0, BD957X_MASK_INT_MAIN_OVD),
REGMAP_IRQ_REG(BD9576_INT_UVD, 0, BD957X_MASK_INT_MAIN_UVD),
REGMAP_IRQ_REG(BD9576_INT_UVP, 0, BD957X_MASK_INT_MAIN_UVP),
REGMAP_IRQ_REG(BD9576_INT_SYS, 0, BD957X_MASK_INT_MAIN_SYS),
};
static struct regmap_irq_chip bd9576_irq_chip = {
.name = "bd9576_irq",
.irqs = &bd9576_irqs[0],
.num_irqs = ARRAY_SIZE(bd9576_irqs),
.status_base = BD957X_REG_INT_MAIN_STAT,
.mask_base = BD957X_REG_INT_MAIN_MASK,
.ack_base = BD957X_REG_INT_MAIN_STAT,
.init_ack_masked = true,
.num_regs = 1,
.irq_reg_stride = 1,
};
static int bd957x_i2c_probe(struct i2c_client *i2c)
{
int ret;
struct regmap *regmap;
struct mfd_cell *cells;
int num_cells;
unsigned long chip_type;
struct irq_domain *domain;
bool usable_irqs;
chip_type = (unsigned long)of_device_get_match_data(&i2c->dev);
switch (chip_type) {
case ROHM_CHIP_TYPE_BD9576:
cells = bd9576_mfd_cells;
num_cells = ARRAY_SIZE(bd9576_mfd_cells);
usable_irqs = !!i2c->irq;
break;
case ROHM_CHIP_TYPE_BD9573:
cells = bd9573_mfd_cells;
num_cells = ARRAY_SIZE(bd9573_mfd_cells);
/*
* BD9573 only supports fatal IRQs which we can not handle
* because SoC is going to lose the power.
*/
usable_irqs = false;
break;
default:
dev_err(&i2c->dev, "Unknown device type");
return -EINVAL;
}
regmap = devm_regmap_init_i2c(i2c, &bd957x_regmap);
if (IS_ERR(regmap))
return dev_err_probe(&i2c->dev, PTR_ERR(regmap),
"Failed to initialize Regmap\n");
/*
* BD9576 behaves badly. It kepts IRQ line asserted for the whole
* duration of detected HW condition (like over temperature). So we
* don't require IRQ to be populated.
* If IRQ information is not given, then we mask all IRQs and do not
* provide IRQ resources to regulator driver - which then just omits
* the notifiers.
*/
if (usable_irqs) {
struct regmap_irq_chip_data *irq_data;
struct mfd_cell *regulators;
regulators = &bd9576_mfd_cells[BD957X_REGULATOR_CELL];
regulators->resources = bd9576_regulator_irqs;
regulators->num_resources = ARRAY_SIZE(bd9576_regulator_irqs);
ret = devm_regmap_add_irq_chip(&i2c->dev, regmap, i2c->irq,
IRQF_ONESHOT, 0,
&bd9576_irq_chip, &irq_data);
if (ret)
return dev_err_probe(&i2c->dev, ret,
"Failed to add IRQ chip\n");
domain = regmap_irq_get_domain(irq_data);
} else {
ret = regmap_update_bits(regmap, BD957X_REG_INT_MAIN_MASK,
BD957X_MASK_INT_ALL,
BD957X_MASK_INT_ALL);
if (ret)
return ret;
domain = NULL;
}
ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO, cells,
num_cells, NULL, 0, domain);
if (ret)
dev_err_probe(&i2c->dev, ret, "Failed to create subdevices\n");
return ret;
}
static const struct of_device_id bd957x_of_match[] = {
{ .compatible = "rohm,bd9576", .data = (void *)ROHM_CHIP_TYPE_BD9576, },
{ .compatible = "rohm,bd9573", .data = (void *)ROHM_CHIP_TYPE_BD9573, },
{ },
};
MODULE_DEVICE_TABLE(of, bd957x_of_match);
static struct i2c_driver bd957x_drv = {
.driver = {
.name = "rohm-bd957x",
.of_match_table = bd957x_of_match,
},
.probe = bd957x_i2c_probe,
};
module_i2c_driver(bd957x_drv);
MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
MODULE_DESCRIPTION("ROHM BD9576MUF and BD9573MUF Power Management IC driver");
MODULE_LICENSE("GPL");