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mfd: pm8008: Add driver for QCOM PM8008 PMIC

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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>
This commit is contained in:
Guru Das Srinagesh 2021-05-25 11:02:40 -07:00 committed by Lee Jones
parent b0572a9b23
commit 6b149f3310
3 changed files with 275 additions and 0 deletions
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14
drivers/mfd/Kconfig
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@ -2117,6 +2117,20 @@ config MFD_ACER_A500_EC
The controller itself is ENE KB930, it is running firmware
customized for the specific needs of the Acer A500 hardware.
config MFD_QCOM_PM8008
tristate "QCOM PM8008 Power Management IC"
depends on I2C && OF
select REGMAP_I2C
select REGMAP_IRQ
help
Select this option to get support for the Qualcomm Technologies, Inc.
PM8008 PMIC chip. PM8008 is a dedicated camera PMIC that integrates
all the necessary power management, housekeeping, and interface
support functions into a single IC. This driver provides common
support for accessing the device by instantiating all the child nodes
under it in the device tree. Additional drivers must be enabled in
order to use the functionality of the device.
menu "Multimedia Capabilities Port drivers"
depends on ARCH_SA1100

1
drivers/mfd/Makefile
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@ -265,6 +265,7 @@ obj-$(CONFIG_MFD_ROHM_BD957XMUF) += rohm-bd9576.o
obj-$(CONFIG_MFD_STMFX) += stmfx.o
obj-$(CONFIG_MFD_KHADAS_MCU) += khadas-mcu.o
obj-$(CONFIG_MFD_ACER_A500_EC) += acer-ec-a500.o
obj-$(CONFIG_MFD_QCOM_PM8008) += qcom-pm8008.o
obj-$(CONFIG_SGI_MFD_IOC3) += ioc3.o
obj-$(CONFIG_MFD_SIMPLE_MFD_I2C) += simple-mfd-i2c.o

260
drivers/mfd/qcom-pm8008.c Normal file
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@ -0,0 +1,260 @@
// 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");