mirror of
https://github.com/torvalds/linux.git
synced 2024-12-05 10:32:35 +00:00
6b149f3310
Qualcomm Technologies, Inc. PM8008 is a dedicated camera PMIC that integrates all the necessary power management, housekeeping, and interface support functions into a single IC. Its key features include overtemperature protection, low-dropout linear regulators, GPIOs, and an I2C interface. Add an MFD driver to support it. Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
261 lines
7.1 KiB
C
261 lines
7.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (c) 2021, The Linux Foundation. All rights reserved.
|
|
*/
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/irqdomain.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/pinctrl/consumer.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <dt-bindings/mfd/qcom-pm8008.h>
|
|
|
|
#define I2C_INTR_STATUS_BASE 0x0550
|
|
#define INT_RT_STS_OFFSET 0x10
|
|
#define INT_SET_TYPE_OFFSET 0x11
|
|
#define INT_POL_HIGH_OFFSET 0x12
|
|
#define INT_POL_LOW_OFFSET 0x13
|
|
#define INT_LATCHED_CLR_OFFSET 0x14
|
|
#define INT_EN_SET_OFFSET 0x15
|
|
#define INT_EN_CLR_OFFSET 0x16
|
|
#define INT_LATCHED_STS_OFFSET 0x18
|
|
|
|
enum {
|
|
PM8008_MISC,
|
|
PM8008_TEMP_ALARM,
|
|
PM8008_GPIO1,
|
|
PM8008_GPIO2,
|
|
PM8008_NUM_PERIPHS,
|
|
};
|
|
|
|
#define PM8008_PERIPH_0_BASE 0x900
|
|
#define PM8008_PERIPH_1_BASE 0x2400
|
|
#define PM8008_PERIPH_2_BASE 0xC000
|
|
#define PM8008_PERIPH_3_BASE 0xC100
|
|
|
|
#define PM8008_TEMP_ALARM_ADDR PM8008_PERIPH_1_BASE
|
|
#define PM8008_GPIO1_ADDR PM8008_PERIPH_2_BASE
|
|
#define PM8008_GPIO2_ADDR PM8008_PERIPH_3_BASE
|
|
|
|
#define PM8008_STATUS_BASE (PM8008_PERIPH_0_BASE | INT_LATCHED_STS_OFFSET)
|
|
#define PM8008_MASK_BASE (PM8008_PERIPH_0_BASE | INT_EN_SET_OFFSET)
|
|
#define PM8008_UNMASK_BASE (PM8008_PERIPH_0_BASE | INT_EN_CLR_OFFSET)
|
|
#define PM8008_TYPE_BASE (PM8008_PERIPH_0_BASE | INT_SET_TYPE_OFFSET)
|
|
#define PM8008_ACK_BASE (PM8008_PERIPH_0_BASE | INT_LATCHED_CLR_OFFSET)
|
|
#define PM8008_POLARITY_HI_BASE (PM8008_PERIPH_0_BASE | INT_POL_HIGH_OFFSET)
|
|
#define PM8008_POLARITY_LO_BASE (PM8008_PERIPH_0_BASE | INT_POL_LOW_OFFSET)
|
|
|
|
#define PM8008_PERIPH_OFFSET(paddr) (paddr - PM8008_PERIPH_0_BASE)
|
|
|
|
struct pm8008_data {
|
|
struct device *dev;
|
|
struct regmap *regmap;
|
|
int irq;
|
|
struct regmap_irq_chip_data *irq_data;
|
|
};
|
|
|
|
static unsigned int p0_offs[] = {PM8008_PERIPH_OFFSET(PM8008_PERIPH_0_BASE)};
|
|
static unsigned int p1_offs[] = {PM8008_PERIPH_OFFSET(PM8008_PERIPH_1_BASE)};
|
|
static unsigned int p2_offs[] = {PM8008_PERIPH_OFFSET(PM8008_PERIPH_2_BASE)};
|
|
static unsigned int p3_offs[] = {PM8008_PERIPH_OFFSET(PM8008_PERIPH_3_BASE)};
|
|
|
|
static struct regmap_irq_sub_irq_map pm8008_sub_reg_offsets[] = {
|
|
REGMAP_IRQ_MAIN_REG_OFFSET(p0_offs),
|
|
REGMAP_IRQ_MAIN_REG_OFFSET(p1_offs),
|
|
REGMAP_IRQ_MAIN_REG_OFFSET(p2_offs),
|
|
REGMAP_IRQ_MAIN_REG_OFFSET(p3_offs),
|
|
};
|
|
|
|
static unsigned int pm8008_virt_regs[] = {
|
|
PM8008_POLARITY_HI_BASE,
|
|
PM8008_POLARITY_LO_BASE,
|
|
};
|
|
|
|
enum {
|
|
POLARITY_HI_INDEX,
|
|
POLARITY_LO_INDEX,
|
|
PM8008_NUM_VIRT_REGS,
|
|
};
|
|
|
|
static struct regmap_irq pm8008_irqs[] = {
|
|
REGMAP_IRQ_REG(PM8008_IRQ_MISC_UVLO, PM8008_MISC, BIT(0)),
|
|
REGMAP_IRQ_REG(PM8008_IRQ_MISC_OVLO, PM8008_MISC, BIT(1)),
|
|
REGMAP_IRQ_REG(PM8008_IRQ_MISC_OTST2, PM8008_MISC, BIT(2)),
|
|
REGMAP_IRQ_REG(PM8008_IRQ_MISC_OTST3, PM8008_MISC, BIT(3)),
|
|
REGMAP_IRQ_REG(PM8008_IRQ_MISC_LDO_OCP, PM8008_MISC, BIT(4)),
|
|
REGMAP_IRQ_REG(PM8008_IRQ_TEMP_ALARM, PM8008_TEMP_ALARM, BIT(0)),
|
|
REGMAP_IRQ_REG(PM8008_IRQ_GPIO1, PM8008_GPIO1, BIT(0)),
|
|
REGMAP_IRQ_REG(PM8008_IRQ_GPIO2, PM8008_GPIO2, BIT(0)),
|
|
};
|
|
|
|
static int pm8008_set_type_virt(unsigned int **virt_buf,
|
|
unsigned int type, unsigned long hwirq,
|
|
int reg)
|
|
{
|
|
switch (type) {
|
|
case IRQ_TYPE_EDGE_FALLING:
|
|
case IRQ_TYPE_LEVEL_LOW:
|
|
virt_buf[POLARITY_HI_INDEX][reg] &= ~pm8008_irqs[hwirq].mask;
|
|
virt_buf[POLARITY_LO_INDEX][reg] |= pm8008_irqs[hwirq].mask;
|
|
break;
|
|
|
|
case IRQ_TYPE_EDGE_RISING:
|
|
case IRQ_TYPE_LEVEL_HIGH:
|
|
virt_buf[POLARITY_HI_INDEX][reg] |= pm8008_irqs[hwirq].mask;
|
|
virt_buf[POLARITY_LO_INDEX][reg] &= ~pm8008_irqs[hwirq].mask;
|
|
break;
|
|
|
|
case IRQ_TYPE_EDGE_BOTH:
|
|
virt_buf[POLARITY_HI_INDEX][reg] |= pm8008_irqs[hwirq].mask;
|
|
virt_buf[POLARITY_LO_INDEX][reg] |= pm8008_irqs[hwirq].mask;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct regmap_irq_chip pm8008_irq_chip = {
|
|
.name = "pm8008_irq",
|
|
.main_status = I2C_INTR_STATUS_BASE,
|
|
.num_main_regs = 1,
|
|
.num_virt_regs = PM8008_NUM_VIRT_REGS,
|
|
.irqs = pm8008_irqs,
|
|
.num_irqs = ARRAY_SIZE(pm8008_irqs),
|
|
.num_regs = PM8008_NUM_PERIPHS,
|
|
.not_fixed_stride = true,
|
|
.sub_reg_offsets = pm8008_sub_reg_offsets,
|
|
.set_type_virt = pm8008_set_type_virt,
|
|
.status_base = PM8008_STATUS_BASE,
|
|
.mask_base = PM8008_MASK_BASE,
|
|
.unmask_base = PM8008_UNMASK_BASE,
|
|
.type_base = PM8008_TYPE_BASE,
|
|
.ack_base = PM8008_ACK_BASE,
|
|
.virt_reg_base = pm8008_virt_regs,
|
|
.num_type_reg = PM8008_NUM_PERIPHS,
|
|
};
|
|
|
|
static struct regmap_config qcom_mfd_regmap_cfg = {
|
|
.reg_bits = 16,
|
|
.val_bits = 8,
|
|
.max_register = 0xFFFF,
|
|
};
|
|
|
|
static int pm8008_init(struct pm8008_data *chip)
|
|
{
|
|
int rc;
|
|
|
|
/*
|
|
* Set TEMP_ALARM peripheral's TYPE so that the regmap-irq framework
|
|
* reads this as the default value instead of zero, the HW default.
|
|
* This is required to enable the writing of TYPE registers in
|
|
* regmap_irq_sync_unlock().
|
|
*/
|
|
rc = regmap_write(chip->regmap,
|
|
(PM8008_TEMP_ALARM_ADDR | INT_SET_TYPE_OFFSET),
|
|
BIT(0));
|
|
if (rc)
|
|
return rc;
|
|
|
|
/* Do the same for GPIO1 and GPIO2 peripherals */
|
|
rc = regmap_write(chip->regmap,
|
|
(PM8008_GPIO1_ADDR | INT_SET_TYPE_OFFSET), BIT(0));
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = regmap_write(chip->regmap,
|
|
(PM8008_GPIO2_ADDR | INT_SET_TYPE_OFFSET), BIT(0));
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int pm8008_probe_irq_peripherals(struct pm8008_data *chip,
|
|
int client_irq)
|
|
{
|
|
int rc, i;
|
|
struct regmap_irq_type *type;
|
|
struct regmap_irq_chip_data *irq_data;
|
|
|
|
rc = pm8008_init(chip);
|
|
if (rc) {
|
|
dev_err(chip->dev, "Init failed: %d\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(pm8008_irqs); i++) {
|
|
type = &pm8008_irqs[i].type;
|
|
|
|
type->type_reg_offset = pm8008_irqs[i].reg_offset;
|
|
type->type_rising_val = pm8008_irqs[i].mask;
|
|
type->type_falling_val = pm8008_irqs[i].mask;
|
|
type->type_level_high_val = 0;
|
|
type->type_level_low_val = 0;
|
|
|
|
if (type->type_reg_offset == PM8008_MISC)
|
|
type->types_supported = IRQ_TYPE_EDGE_RISING;
|
|
else
|
|
type->types_supported = (IRQ_TYPE_EDGE_BOTH |
|
|
IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW);
|
|
}
|
|
|
|
rc = devm_regmap_add_irq_chip(chip->dev, chip->regmap, client_irq,
|
|
IRQF_SHARED, 0, &pm8008_irq_chip, &irq_data);
|
|
if (rc) {
|
|
dev_err(chip->dev, "Failed to add IRQ chip: %d\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pm8008_probe(struct i2c_client *client)
|
|
{
|
|
int rc;
|
|
struct pm8008_data *chip;
|
|
|
|
chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
|
|
if (!chip)
|
|
return -ENOMEM;
|
|
|
|
chip->dev = &client->dev;
|
|
chip->regmap = devm_regmap_init_i2c(client, &qcom_mfd_regmap_cfg);
|
|
if (!chip->regmap)
|
|
return -ENODEV;
|
|
|
|
i2c_set_clientdata(client, chip);
|
|
|
|
if (of_property_read_bool(chip->dev->of_node, "interrupt-controller")) {
|
|
rc = pm8008_probe_irq_peripherals(chip, client->irq);
|
|
if (rc)
|
|
dev_err(chip->dev, "Failed to probe irq periphs: %d\n", rc);
|
|
}
|
|
|
|
return devm_of_platform_populate(chip->dev);
|
|
}
|
|
|
|
static const struct of_device_id pm8008_match[] = {
|
|
{ .compatible = "qcom,pm8008", },
|
|
{ },
|
|
};
|
|
|
|
static struct i2c_driver pm8008_mfd_driver = {
|
|
.driver = {
|
|
.name = "pm8008",
|
|
.of_match_table = pm8008_match,
|
|
},
|
|
.probe_new = pm8008_probe,
|
|
};
|
|
module_i2c_driver(pm8008_mfd_driver);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("i2c:qcom-pm8008");
|