mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-29 23:53:32 +00:00
def387a239
Various spelling mistakes in comments. Detected with the help of Coccinelle. Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr> Reviewed-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Link: https://lore.kernel.org/r/20220314115354.144023-29-Julia.Lawall@inria.fr
189 lines
5.5 KiB
C
189 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_device.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,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
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)) {
|
|
dev_err(&i2c->dev, "Failed to initialize Regmap\n");
|
|
return PTR_ERR(regmap);
|
|
}
|
|
|
|
/*
|
|
* 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) {
|
|
dev_err(&i2c->dev, "Failed to add IRQ chip\n");
|
|
return ret;
|
|
}
|
|
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(&i2c->dev, "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");
|