mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 04:20:53 +07:00
mfd: Add ST Multi-Function eXpander (STMFX) core driver
STMicroelectronics Multi-Function eXpander (STMFX) is a slave controller using I2C for communication with the main MCU. Main features are: - 16 fast GPIOs individually configurable in input/output - 8 alternate GPIOs individually configurable in input/output when other STMFX functions are not used - Main MCU IDD measurement - Resistive touchscreen controller Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Amelie Delaunay
Lee Jones
parent
fb8c869110
commit
06252ade91
@ -1907,6 +1907,19 @@ config MFD_STPMIC1
|
||||
To compile this driver as a module, choose M here: the
|
||||
module will be called stpmic1.
|
||||
|
||||
config MFD_STMFX
|
||||
tristate "Support for STMicroelectronics Multi-Function eXpander (STMFX)"
|
||||
depends on I2C
|
||||
depends on OF || COMPILE_TEST
|
||||
select MFD_CORE
|
||||
select REGMAP_I2C
|
||||
help
|
||||
Support for the STMicroelectronics Multi-Function eXpander.
|
||||
|
||||
This driver provides common support for accessing the device,
|
||||
additional drivers must be enabled in order to use the functionality
|
||||
of the device.
|
||||
|
||||
menu "Multimedia Capabilities Port drivers"
|
||||
depends on ARCH_SA1100
|
||||
|
||||
|
||||
@ -246,4 +246,4 @@ obj-$(CONFIG_MFD_MXS_LRADC) += mxs-lradc.o
|
||||
obj-$(CONFIG_MFD_SC27XX_PMIC) += sprd-sc27xx-spi.o
|
||||
obj-$(CONFIG_RAVE_SP_CORE) += rave-sp.o
|
||||
obj-$(CONFIG_MFD_ROHM_BD718XX) += rohm-bd718x7.o
|
||||
|
||||
obj-$(CONFIG_MFD_STMFX) += stmfx.o
|
||||
|
||||
545
drivers/mfd/stmfx.c
Normal file
545
drivers/mfd/stmfx.c
Normal file
@ -0,0 +1,545 @@
|
||||
// SPDX-License-Identifier: GPL-2.0
|
||||
/*
|
||||
* Driver for STMicroelectronics Multi-Function eXpander (STMFX) core
|
||||
*
|
||||
* Copyright (C) 2019 STMicroelectronics
|
||||
* Author(s): Amelie Delaunay <amelie.delaunay@st.com>.
|
||||
*/
|
||||
#include <linux/bitfield.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/irq.h>
|
||||
#include <linux/mfd/core.h>
|
||||
#include <linux/mfd/stmfx.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/regulator/consumer.h>
|
||||
|
||||
static bool stmfx_reg_volatile(struct device *dev, unsigned int reg)
|
||||
{
|
||||
switch (reg) {
|
||||
case STMFX_REG_SYS_CTRL:
|
||||
case STMFX_REG_IRQ_SRC_EN:
|
||||
case STMFX_REG_IRQ_PENDING:
|
||||
case STMFX_REG_IRQ_GPI_PENDING1:
|
||||
case STMFX_REG_IRQ_GPI_PENDING2:
|
||||
case STMFX_REG_IRQ_GPI_PENDING3:
|
||||
case STMFX_REG_GPIO_STATE1:
|
||||
case STMFX_REG_GPIO_STATE2:
|
||||
case STMFX_REG_GPIO_STATE3:
|
||||
case STMFX_REG_IRQ_GPI_SRC1:
|
||||
case STMFX_REG_IRQ_GPI_SRC2:
|
||||
case STMFX_REG_IRQ_GPI_SRC3:
|
||||
case STMFX_REG_GPO_SET1:
|
||||
case STMFX_REG_GPO_SET2:
|
||||
case STMFX_REG_GPO_SET3:
|
||||
case STMFX_REG_GPO_CLR1:
|
||||
case STMFX_REG_GPO_CLR2:
|
||||
case STMFX_REG_GPO_CLR3:
|
||||
return true;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
static bool stmfx_reg_writeable(struct device *dev, unsigned int reg)
|
||||
{
|
||||
return (reg >= STMFX_REG_SYS_CTRL);
|
||||
}
|
||||
|
||||
static const struct regmap_config stmfx_regmap_config = {
|
||||
.reg_bits = 8,
|
||||
.reg_stride = 1,
|
||||
.val_bits = 8,
|
||||
.max_register = STMFX_REG_MAX,
|
||||
.volatile_reg = stmfx_reg_volatile,
|
||||
.writeable_reg = stmfx_reg_writeable,
|
||||
.cache_type = REGCACHE_RBTREE,
|
||||
};
|
||||
|
||||
static const struct resource stmfx_pinctrl_resources[] = {
|
||||
DEFINE_RES_IRQ(STMFX_REG_IRQ_SRC_EN_GPIO),
|
||||
};
|
||||
|
||||
static const struct resource stmfx_idd_resources[] = {
|
||||
DEFINE_RES_IRQ(STMFX_REG_IRQ_SRC_EN_IDD),
|
||||
DEFINE_RES_IRQ(STMFX_REG_IRQ_SRC_EN_ERROR),
|
||||
};
|
||||
|
||||
static const struct resource stmfx_ts_resources[] = {
|
||||
DEFINE_RES_IRQ(STMFX_REG_IRQ_SRC_EN_TS_DET),
|
||||
DEFINE_RES_IRQ(STMFX_REG_IRQ_SRC_EN_TS_NE),
|
||||
DEFINE_RES_IRQ(STMFX_REG_IRQ_SRC_EN_TS_TH),
|
||||
DEFINE_RES_IRQ(STMFX_REG_IRQ_SRC_EN_TS_FULL),
|
||||
DEFINE_RES_IRQ(STMFX_REG_IRQ_SRC_EN_TS_OVF),
|
||||
};
|
||||
|
||||
static struct mfd_cell stmfx_cells[] = {
|
||||
{
|
||||
.of_compatible = "st,stmfx-0300-pinctrl",
|
||||
.name = "stmfx-pinctrl",
|
||||
.resources = stmfx_pinctrl_resources,
|
||||
.num_resources = ARRAY_SIZE(stmfx_pinctrl_resources),
|
||||
},
|
||||
{
|
||||
.of_compatible = "st,stmfx-0300-idd",
|
||||
.name = "stmfx-idd",
|
||||
.resources = stmfx_idd_resources,
|
||||
.num_resources = ARRAY_SIZE(stmfx_idd_resources),
|
||||
},
|
||||
{
|
||||
.of_compatible = "st,stmfx-0300-ts",
|
||||
.name = "stmfx-ts",
|
||||
.resources = stmfx_ts_resources,
|
||||
.num_resources = ARRAY_SIZE(stmfx_ts_resources),
|
||||
},
|
||||
};
|
||||
|
||||
static u8 stmfx_func_to_mask(u32 func)
|
||||
{
|
||||
u8 mask = 0;
|
||||
|
||||
if (func & STMFX_FUNC_GPIO)
|
||||
mask |= STMFX_REG_SYS_CTRL_GPIO_EN;
|
||||
|
||||
if ((func & STMFX_FUNC_ALTGPIO_LOW) || (func & STMFX_FUNC_ALTGPIO_HIGH))
|
||||
mask |= STMFX_REG_SYS_CTRL_ALTGPIO_EN;
|
||||
|
||||
if (func & STMFX_FUNC_TS)
|
||||
mask |= STMFX_REG_SYS_CTRL_TS_EN;
|
||||
|
||||
if (func & STMFX_FUNC_IDD)
|
||||
mask |= STMFX_REG_SYS_CTRL_IDD_EN;
|
||||
|
||||
return mask;
|
||||
}
|
||||
|
||||
int stmfx_function_enable(struct stmfx *stmfx, u32 func)
|
||||
{
|
||||
u32 sys_ctrl;
|
||||
u8 mask;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(stmfx->map, STMFX_REG_SYS_CTRL, &sys_ctrl);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
/*
|
||||
* IDD and TS have priority in STMFX FW, so if IDD and TS are enabled,
|
||||
* ALTGPIO function is disabled by STMFX FW. If IDD or TS is enabled,
|
||||
* the number of aGPIO available decreases. To avoid GPIO management
|
||||
* disturbance, abort IDD or TS function enable in this case.
|
||||
*/
|
||||
if (((func & STMFX_FUNC_IDD) || (func & STMFX_FUNC_TS)) &&
|
||||
(sys_ctrl & STMFX_REG_SYS_CTRL_ALTGPIO_EN)) {
|
||||
dev_err(stmfx->dev, "ALTGPIO function already enabled\n");
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
/* If TS is enabled, aGPIO[3:0] cannot be used */
|
||||
if ((func & STMFX_FUNC_ALTGPIO_LOW) &&
|
||||
(sys_ctrl & STMFX_REG_SYS_CTRL_TS_EN)) {
|
||||
dev_err(stmfx->dev, "TS in use, aGPIO[3:0] unavailable\n");
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
/* If IDD is enabled, aGPIO[7:4] cannot be used */
|
||||
if ((func & STMFX_FUNC_ALTGPIO_HIGH) &&
|
||||
(sys_ctrl & STMFX_REG_SYS_CTRL_IDD_EN)) {
|
||||
dev_err(stmfx->dev, "IDD in use, aGPIO[7:4] unavailable\n");
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
mask = stmfx_func_to_mask(func);
|
||||
|
||||
return regmap_update_bits(stmfx->map, STMFX_REG_SYS_CTRL, mask, mask);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(stmfx_function_enable);
|
||||
|
||||
int stmfx_function_disable(struct stmfx *stmfx, u32 func)
|
||||
{
|
||||
u8 mask = stmfx_func_to_mask(func);
|
||||
|
||||
return regmap_update_bits(stmfx->map, STMFX_REG_SYS_CTRL, mask, 0);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(stmfx_function_disable);
|
||||
|
||||
static void stmfx_irq_bus_lock(struct irq_data *data)
|
||||
{
|
||||
struct stmfx *stmfx = irq_data_get_irq_chip_data(data);
|
||||
|
||||
mutex_lock(&stmfx->lock);
|
||||
}
|
||||
|
||||
static void stmfx_irq_bus_sync_unlock(struct irq_data *data)
|
||||
{
|
||||
struct stmfx *stmfx = irq_data_get_irq_chip_data(data);
|
||||
|
||||
regmap_write(stmfx->map, STMFX_REG_IRQ_SRC_EN, stmfx->irq_src);
|
||||
|
||||
mutex_unlock(&stmfx->lock);
|
||||
}
|
||||
|
||||
static void stmfx_irq_mask(struct irq_data *data)
|
||||
{
|
||||
struct stmfx *stmfx = irq_data_get_irq_chip_data(data);
|
||||
|
||||
stmfx->irq_src &= ~BIT(data->hwirq % 8);
|
||||
}
|
||||
|
||||
static void stmfx_irq_unmask(struct irq_data *data)
|
||||
{
|
||||
struct stmfx *stmfx = irq_data_get_irq_chip_data(data);
|
||||
|
||||
stmfx->irq_src |= BIT(data->hwirq % 8);
|
||||
}
|
||||
|
||||
static struct irq_chip stmfx_irq_chip = {
|
||||
.name = "stmfx-core",
|
||||
.irq_bus_lock = stmfx_irq_bus_lock,
|
||||
.irq_bus_sync_unlock = stmfx_irq_bus_sync_unlock,
|
||||
.irq_mask = stmfx_irq_mask,
|
||||
.irq_unmask = stmfx_irq_unmask,
|
||||
};
|
||||
|
||||
static irqreturn_t stmfx_irq_handler(int irq, void *data)
|
||||
{
|
||||
struct stmfx *stmfx = data;
|
||||
unsigned long n, pending;
|
||||
u32 ack;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(stmfx->map, STMFX_REG_IRQ_PENDING,
|
||||
(u32 *)&pending);
|
||||
if (ret)
|
||||
return IRQ_NONE;
|
||||
|
||||
/*
|
||||
* There is no ACK for GPIO, MFX_REG_IRQ_PENDING_GPIO is a logical OR
|
||||
* of MFX_REG_IRQ_GPI _PENDING1/_PENDING2/_PENDING3
|
||||
*/
|
||||
ack = pending & ~BIT(STMFX_REG_IRQ_SRC_EN_GPIO);
|
||||
if (ack) {
|
||||
ret = regmap_write(stmfx->map, STMFX_REG_IRQ_ACK, ack);
|
||||
if (ret)
|
||||
return IRQ_NONE;
|
||||
}
|
||||
|
||||
for_each_set_bit(n, &pending, STMFX_REG_IRQ_SRC_MAX)
|
||||
handle_nested_irq(irq_find_mapping(stmfx->irq_domain, n));
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int stmfx_irq_map(struct irq_domain *d, unsigned int virq,
|
||||
irq_hw_number_t hwirq)
|
||||
{
|
||||
irq_set_chip_data(virq, d->host_data);
|
||||
irq_set_chip_and_handler(virq, &stmfx_irq_chip, handle_simple_irq);
|
||||
irq_set_nested_thread(virq, 1);
|
||||
irq_set_noprobe(virq);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void stmfx_irq_unmap(struct irq_domain *d, unsigned int virq)
|
||||
{
|
||||
irq_set_chip_and_handler(virq, NULL, NULL);
|
||||
irq_set_chip_data(virq, NULL);
|
||||
}
|
||||
|
||||
static const struct irq_domain_ops stmfx_irq_ops = {
|
||||
.map = stmfx_irq_map,
|
||||
.unmap = stmfx_irq_unmap,
|
||||
};
|
||||
|
||||
static void stmfx_irq_exit(struct i2c_client *client)
|
||||
{
|
||||
struct stmfx *stmfx = i2c_get_clientdata(client);
|
||||
int hwirq;
|
||||
|
||||
for (hwirq = 0; hwirq < STMFX_REG_IRQ_SRC_MAX; hwirq++)
|
||||
irq_dispose_mapping(irq_find_mapping(stmfx->irq_domain, hwirq));
|
||||
|
||||
irq_domain_remove(stmfx->irq_domain);
|
||||
}
|
||||
|
||||
static int stmfx_irq_init(struct i2c_client *client)
|
||||
{
|
||||
struct stmfx *stmfx = i2c_get_clientdata(client);
|
||||
u32 irqoutpin = 0, irqtrigger;
|
||||
int ret;
|
||||
|
||||
stmfx->irq_domain = irq_domain_add_simple(stmfx->dev->of_node,
|
||||
STMFX_REG_IRQ_SRC_MAX, 0,
|
||||
&stmfx_irq_ops, stmfx);
|
||||
if (!stmfx->irq_domain) {
|
||||
dev_err(stmfx->dev, "Failed to create IRQ domain\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (!of_property_read_bool(stmfx->dev->of_node, "drive-open-drain"))
|
||||
irqoutpin |= STMFX_REG_IRQ_OUT_PIN_TYPE;
|
||||
|
||||
irqtrigger = irq_get_trigger_type(client->irq);
|
||||
if ((irqtrigger & IRQ_TYPE_EDGE_RISING) ||
|
||||
(irqtrigger & IRQ_TYPE_LEVEL_HIGH))
|
||||
irqoutpin |= STMFX_REG_IRQ_OUT_PIN_POL;
|
||||
|
||||
ret = regmap_write(stmfx->map, STMFX_REG_IRQ_OUT_PIN, irqoutpin);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = devm_request_threaded_irq(stmfx->dev, client->irq,
|
||||
NULL, stmfx_irq_handler,
|
||||
irqtrigger | IRQF_ONESHOT,
|
||||
"stmfx", stmfx);
|
||||
if (ret)
|
||||
stmfx_irq_exit(client);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int stmfx_chip_reset(struct stmfx *stmfx)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = regmap_write(stmfx->map, STMFX_REG_SYS_CTRL,
|
||||
STMFX_REG_SYS_CTRL_SWRST);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
msleep(STMFX_BOOT_TIME_MS);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int stmfx_chip_init(struct i2c_client *client)
|
||||
{
|
||||
struct stmfx *stmfx = i2c_get_clientdata(client);
|
||||
u32 id;
|
||||
u8 version[2];
|
||||
int ret;
|
||||
|
||||
stmfx->vdd = devm_regulator_get_optional(&client->dev, "vdd");
|
||||
ret = PTR_ERR_OR_ZERO(stmfx->vdd);
|
||||
if (ret == -ENODEV) {
|
||||
stmfx->vdd = NULL;
|
||||
} else if (ret == -EPROBE_DEFER) {
|
||||
return ret;
|
||||
} else if (ret) {
|
||||
dev_err(&client->dev, "Failed to get VDD regulator: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (stmfx->vdd) {
|
||||
ret = regulator_enable(stmfx->vdd);
|
||||
if (ret) {
|
||||
dev_err(&client->dev, "VDD enable failed: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
ret = regmap_read(stmfx->map, STMFX_REG_CHIP_ID, &id);
|
||||
if (ret) {
|
||||
dev_err(&client->dev, "Error reading chip ID: %d\n", ret);
|
||||
goto err;
|
||||
}
|
||||
|
||||
/*
|
||||
* Check that ID is the complement of the I2C address:
|
||||
* STMFX I2C address follows the 7-bit format (MSB), that's why
|
||||
* client->addr is shifted.
|
||||
*
|
||||
* STMFX_I2C_ADDR| STMFX | Linux
|
||||
* input pin | I2C device address | I2C device address
|
||||
*---------------------------------------------------------
|
||||
* 0 | b: 1000 010x h:0x84 | 0x42
|
||||
* 1 | b: 1000 011x h:0x86 | 0x43
|
||||
*/
|
||||
if (FIELD_GET(STMFX_REG_CHIP_ID_MASK, ~id) != (client->addr << 1)) {
|
||||
dev_err(&client->dev, "Unknown chip ID: %#x\n", id);
|
||||
ret = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
ret = regmap_bulk_read(stmfx->map, STMFX_REG_FW_VERSION_MSB,
|
||||
version, ARRAY_SIZE(version));
|
||||
if (ret) {
|
||||
dev_err(&client->dev, "Error reading FW version: %d\n", ret);
|
||||
goto err;
|
||||
}
|
||||
|
||||
dev_info(&client->dev, "STMFX id: %#x, fw version: %x.%02x\n",
|
||||
id, version[0], version[1]);
|
||||
|
||||
ret = stmfx_chip_reset(stmfx);
|
||||
if (ret) {
|
||||
dev_err(&client->dev, "Failed to reset chip: %d\n", ret);
|
||||
goto err;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err:
|
||||
if (stmfx->vdd)
|
||||
return regulator_disable(stmfx->vdd);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int stmfx_chip_exit(struct i2c_client *client)
|
||||
{
|
||||
struct stmfx *stmfx = i2c_get_clientdata(client);
|
||||
|
||||
regmap_write(stmfx->map, STMFX_REG_IRQ_SRC_EN, 0);
|
||||
regmap_write(stmfx->map, STMFX_REG_SYS_CTRL, 0);
|
||||
|
||||
if (stmfx->vdd)
|
||||
return regulator_disable(stmfx->vdd);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int stmfx_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct device *dev = &client->dev;
|
||||
struct stmfx *stmfx;
|
||||
int ret;
|
||||
|
||||
stmfx = devm_kzalloc(dev, sizeof(*stmfx), GFP_KERNEL);
|
||||
if (!stmfx)
|
||||
return -ENOMEM;
|
||||
|
||||
i2c_set_clientdata(client, stmfx);
|
||||
|
||||
stmfx->dev = dev;
|
||||
|
||||
stmfx->map = devm_regmap_init_i2c(client, &stmfx_regmap_config);
|
||||
if (IS_ERR(stmfx->map)) {
|
||||
ret = PTR_ERR(stmfx->map);
|
||||
dev_err(dev, "Failed to allocate register map: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
mutex_init(&stmfx->lock);
|
||||
|
||||
ret = stmfx_chip_init(client);
|
||||
if (ret) {
|
||||
if (ret == -ETIMEDOUT)
|
||||
return -EPROBE_DEFER;
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (client->irq < 0) {
|
||||
dev_err(dev, "Failed to get IRQ: %d\n", client->irq);
|
||||
ret = client->irq;
|
||||
goto err_chip_exit;
|
||||
}
|
||||
|
||||
ret = stmfx_irq_init(client);
|
||||
if (ret)
|
||||
goto err_chip_exit;
|
||||
|
||||
ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
|
||||
stmfx_cells, ARRAY_SIZE(stmfx_cells), NULL,
|
||||
0, stmfx->irq_domain);
|
||||
if (ret)
|
||||
goto err_irq_exit;
|
||||
|
||||
return 0;
|
||||
|
||||
err_irq_exit:
|
||||
stmfx_irq_exit(client);
|
||||
err_chip_exit:
|
||||
stmfx_chip_exit(client);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int stmfx_remove(struct i2c_client *client)
|
||||
{
|
||||
stmfx_irq_exit(client);
|
||||
|
||||
return stmfx_chip_exit(client);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM_SLEEP
|
||||
static int stmfx_suspend(struct device *dev)
|
||||
{
|
||||
struct stmfx *stmfx = dev_get_drvdata(dev);
|
||||
int ret;
|
||||
|
||||
ret = regmap_raw_read(stmfx->map, STMFX_REG_SYS_CTRL,
|
||||
&stmfx->bkp_sysctrl, sizeof(stmfx->bkp_sysctrl));
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = regmap_raw_read(stmfx->map, STMFX_REG_IRQ_OUT_PIN,
|
||||
&stmfx->bkp_irqoutpin,
|
||||
sizeof(stmfx->bkp_irqoutpin));
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (stmfx->vdd)
|
||||
return regulator_disable(stmfx->vdd);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int stmfx_resume(struct device *dev)
|
||||
{
|
||||
struct stmfx *stmfx = dev_get_drvdata(dev);
|
||||
int ret;
|
||||
|
||||
if (stmfx->vdd) {
|
||||
ret = regulator_enable(stmfx->vdd);
|
||||
if (ret) {
|
||||
dev_err(stmfx->dev,
|
||||
"VDD enable failed: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
ret = regmap_raw_write(stmfx->map, STMFX_REG_SYS_CTRL,
|
||||
&stmfx->bkp_sysctrl, sizeof(stmfx->bkp_sysctrl));
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = regmap_raw_write(stmfx->map, STMFX_REG_IRQ_OUT_PIN,
|
||||
&stmfx->bkp_irqoutpin,
|
||||
sizeof(stmfx->bkp_irqoutpin));
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = regmap_raw_write(stmfx->map, STMFX_REG_IRQ_SRC_EN,
|
||||
&stmfx->irq_src, sizeof(stmfx->irq_src));
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(stmfx_dev_pm_ops, stmfx_suspend, stmfx_resume);
|
||||
|
||||
static const struct of_device_id stmfx_of_match[] = {
|
||||
{ .compatible = "st,stmfx-0300", },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, stmfx_of_match);
|
||||
|
||||
static struct i2c_driver stmfx_driver = {
|
||||
.driver = {
|
||||
.name = "stmfx-core",
|
||||
.of_match_table = of_match_ptr(stmfx_of_match),
|
||||
.pm = &stmfx_dev_pm_ops,
|
||||
},
|
||||
.probe = stmfx_probe,
|
||||
.remove = stmfx_remove,
|
||||
};
|
||||
module_i2c_driver(stmfx_driver);
|
||||
|
||||
MODULE_DESCRIPTION("STMFX core driver");
|
||||
MODULE_AUTHOR("Amelie Delaunay <amelie.delaunay@st.com>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
123
include/linux/mfd/stmfx.h
Normal file
123
include/linux/mfd/stmfx.h
Normal file
@ -0,0 +1,123 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
/*
|
||||
* Copyright (C) 2019 STMicroelectronics
|
||||
* Author(s): Amelie Delaunay <amelie.delaunay@st.com>.
|
||||
*/
|
||||
|
||||
#ifndef MFD_STMFX_H
|
||||
#define MFX_STMFX_H
|
||||
|
||||
#include <linux/regmap.h>
|
||||
|
||||
/* General */
|
||||
#define STMFX_REG_CHIP_ID 0x00 /* R */
|
||||
#define STMFX_REG_FW_VERSION_MSB 0x01 /* R */
|
||||
#define STMFX_REG_FW_VERSION_LSB 0x02 /* R */
|
||||
#define STMFX_REG_SYS_CTRL 0x40 /* RW */
|
||||
/* IRQ output management */
|
||||
#define STMFX_REG_IRQ_OUT_PIN 0x41 /* RW */
|
||||
#define STMFX_REG_IRQ_SRC_EN 0x42 /* RW */
|
||||
#define STMFX_REG_IRQ_PENDING 0x08 /* R */
|
||||
#define STMFX_REG_IRQ_ACK 0x44 /* RW */
|
||||
/* GPIO management */
|
||||
#define STMFX_REG_IRQ_GPI_PENDING1 0x0C /* R */
|
||||
#define STMFX_REG_IRQ_GPI_PENDING2 0x0D /* R */
|
||||
#define STMFX_REG_IRQ_GPI_PENDING3 0x0E /* R */
|
||||
#define STMFX_REG_GPIO_STATE1 0x10 /* R */
|
||||
#define STMFX_REG_GPIO_STATE2 0x11 /* R */
|
||||
#define STMFX_REG_GPIO_STATE3 0x12 /* R */
|
||||
#define STMFX_REG_IRQ_GPI_SRC1 0x48 /* RW */
|
||||
#define STMFX_REG_IRQ_GPI_SRC2 0x49 /* RW */
|
||||
#define STMFX_REG_IRQ_GPI_SRC3 0x4A /* RW */
|
||||
#define STMFX_REG_IRQ_GPI_EVT1 0x4C /* RW */
|
||||
#define STMFX_REG_IRQ_GPI_EVT2 0x4D /* RW */
|
||||
#define STMFX_REG_IRQ_GPI_EVT3 0x4E /* RW */
|
||||
#define STMFX_REG_IRQ_GPI_TYPE1 0x50 /* RW */
|
||||
#define STMFX_REG_IRQ_GPI_TYPE2 0x51 /* RW */
|
||||
#define STMFX_REG_IRQ_GPI_TYPE3 0x52 /* RW */
|
||||
#define STMFX_REG_IRQ_GPI_ACK1 0x54 /* RW */
|
||||
#define STMFX_REG_IRQ_GPI_ACK2 0x55 /* RW */
|
||||
#define STMFX_REG_IRQ_GPI_ACK3 0x56 /* RW */
|
||||
#define STMFX_REG_GPIO_DIR1 0x60 /* RW */
|
||||
#define STMFX_REG_GPIO_DIR2 0x61 /* RW */
|
||||
#define STMFX_REG_GPIO_DIR3 0x62 /* RW */
|
||||
#define STMFX_REG_GPIO_TYPE1 0x64 /* RW */
|
||||
#define STMFX_REG_GPIO_TYPE2 0x65 /* RW */
|
||||
#define STMFX_REG_GPIO_TYPE3 0x66 /* RW */
|
||||
#define STMFX_REG_GPIO_PUPD1 0x68 /* RW */
|
||||
#define STMFX_REG_GPIO_PUPD2 0x69 /* RW */
|
||||
#define STMFX_REG_GPIO_PUPD3 0x6A /* RW */
|
||||
#define STMFX_REG_GPO_SET1 0x6C /* RW */
|
||||
#define STMFX_REG_GPO_SET2 0x6D /* RW */
|
||||
#define STMFX_REG_GPO_SET3 0x6E /* RW */
|
||||
#define STMFX_REG_GPO_CLR1 0x70 /* RW */
|
||||
#define STMFX_REG_GPO_CLR2 0x71 /* RW */
|
||||
#define STMFX_REG_GPO_CLR3 0x72 /* RW */
|
||||
|
||||
#define STMFX_REG_MAX 0xB0
|
||||
|
||||
/* MFX boot time is around 10ms, so after reset, we have to wait this delay */
|
||||
#define STMFX_BOOT_TIME_MS 10
|
||||
|
||||
/* STMFX_REG_CHIP_ID bitfields */
|
||||
#define STMFX_REG_CHIP_ID_MASK GENMASK(7, 0)
|
||||
|
||||
/* STMFX_REG_SYS_CTRL bitfields */
|
||||
#define STMFX_REG_SYS_CTRL_GPIO_EN BIT(0)
|
||||
#define STMFX_REG_SYS_CTRL_TS_EN BIT(1)
|
||||
#define STMFX_REG_SYS_CTRL_IDD_EN BIT(2)
|
||||
#define STMFX_REG_SYS_CTRL_ALTGPIO_EN BIT(3)
|
||||
#define STMFX_REG_SYS_CTRL_SWRST BIT(7)
|
||||
|
||||
/* STMFX_REG_IRQ_OUT_PIN bitfields */
|
||||
#define STMFX_REG_IRQ_OUT_PIN_TYPE BIT(0) /* 0-OD 1-PP */
|
||||
#define STMFX_REG_IRQ_OUT_PIN_POL BIT(1) /* 0-active LOW 1-active HIGH */
|
||||
|
||||
/* STMFX_REG_IRQ_(SRC_EN/PENDING/ACK) bit shift */
|
||||
enum stmfx_irqs {
|
||||
STMFX_REG_IRQ_SRC_EN_GPIO = 0,
|
||||
STMFX_REG_IRQ_SRC_EN_IDD,
|
||||
STMFX_REG_IRQ_SRC_EN_ERROR,
|
||||
STMFX_REG_IRQ_SRC_EN_TS_DET,
|
||||
STMFX_REG_IRQ_SRC_EN_TS_NE,
|
||||
STMFX_REG_IRQ_SRC_EN_TS_TH,
|
||||
STMFX_REG_IRQ_SRC_EN_TS_FULL,
|
||||
STMFX_REG_IRQ_SRC_EN_TS_OVF,
|
||||
STMFX_REG_IRQ_SRC_MAX,
|
||||
};
|
||||
|
||||
enum stmfx_functions {
|
||||
STMFX_FUNC_GPIO = BIT(0), /* GPIO[15:0] */
|
||||
STMFX_FUNC_ALTGPIO_LOW = BIT(1), /* aGPIO[3:0] */
|
||||
STMFX_FUNC_ALTGPIO_HIGH = BIT(2), /* aGPIO[7:4] */
|
||||
STMFX_FUNC_TS = BIT(3),
|
||||
STMFX_FUNC_IDD = BIT(4),
|
||||
};
|
||||
|
||||
/**
|
||||
* struct stmfx_ddata - STMFX MFD structure
|
||||
* @device: device reference used for logs
|
||||
* @map: register map
|
||||
* @vdd: STMFX power supply
|
||||
* @irq_domain: IRQ domain
|
||||
* @lock: IRQ bus lock
|
||||
* @irq_src: cache of IRQ_SRC_EN register for bus_lock
|
||||
* @bkp_sysctrl: backup of SYS_CTRL register for suspend/resume
|
||||
* @bkp_irqoutpin: backup of IRQ_OUT_PIN register for suspend/resume
|
||||
*/
|
||||
struct stmfx {
|
||||
struct device *dev;
|
||||
struct regmap *map;
|
||||
struct regulator *vdd;
|
||||
struct irq_domain *irq_domain;
|
||||
struct mutex lock; /* IRQ bus lock */
|
||||
u8 irq_src;
|
||||
#ifdef CONFIG_PM
|
||||
u8 bkp_sysctrl;
|
||||
u8 bkp_irqoutpin;
|
||||
#endif
|
||||
};
|
||||
|
||||
int stmfx_function_enable(struct stmfx *stmfx, u32 func);
|
||||
int stmfx_function_disable(struct stmfx *stmfx, u32 func);
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user