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linux/drivers/mfd/tps65910.c
Dmitry Osipenko 7620ad0bdf mfd: tps65910: Set PWR_OFF bit during driver probe 
The PWR_OFF bit needs to be set in order to power off properly, without
hanging PMIC. This bit needs to be set early in order to allow thermal
protection of NVIDIA Terga SoCs to power off hardware properly, otherwise
a battery re-plug may be needed on some devices to recover after the hang.

Cc: <stable@vger.kernel.org>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Tested-by: Svyatoslav Ryhel <clamor95@gmail.com> # ASUS TF201
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20211124190104.23554-1-digetx@gmail.com
2021-12-29 13:36:16 +00:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* tps65910.c -- TI TPS6591x chip family multi-function driver
*
* Copyright 2010 Texas Instruments Inc.
*
* Author: Graeme Gregory <gg@slimlogic.co.uk>
* Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
*/
#include <linux/init.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/mfd/core.h>
#include <linux/regmap.h>
#include <linux/mfd/tps65910.h>
#include <linux/of.h>
#include <linux/of_device.h>
static const struct resource rtc_resources[] = {
{
.start = TPS65910_IRQ_RTC_ALARM,
.end = TPS65910_IRQ_RTC_ALARM,
.flags = IORESOURCE_IRQ,
}
};
static const struct mfd_cell tps65910s[] = {
{
.name = "tps65910-gpio",
},
{
.name = "tps65910-pmic",
},
{
.name = "tps65910-rtc",
.num_resources = ARRAY_SIZE(rtc_resources),
.resources = &rtc_resources[0],
},
{
.name = "tps65910-power",
},
};
static const struct regmap_irq tps65911_irqs[] = {
/* INT_STS */
[TPS65911_IRQ_PWRHOLD_F] = {
.mask = INT_MSK_PWRHOLD_F_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65911_IRQ_VBAT_VMHI] = {
.mask = INT_MSK_VMBHI_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65911_IRQ_PWRON] = {
.mask = INT_MSK_PWRON_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65911_IRQ_PWRON_LP] = {
.mask = INT_MSK_PWRON_LP_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65911_IRQ_PWRHOLD_R] = {
.mask = INT_MSK_PWRHOLD_R_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65911_IRQ_HOTDIE] = {
.mask = INT_MSK_HOTDIE_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65911_IRQ_RTC_ALARM] = {
.mask = INT_MSK_RTC_ALARM_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65911_IRQ_RTC_PERIOD] = {
.mask = INT_MSK_RTC_PERIOD_IT_MSK_MASK,
.reg_offset = 0,
},
/* INT_STS2 */
[TPS65911_IRQ_GPIO0_R] = {
.mask = INT_MSK2_GPIO0_R_IT_MSK_MASK,
.reg_offset = 1,
},
[TPS65911_IRQ_GPIO0_F] = {
.mask = INT_MSK2_GPIO0_F_IT_MSK_MASK,
.reg_offset = 1,
},
[TPS65911_IRQ_GPIO1_R] = {
.mask = INT_MSK2_GPIO1_R_IT_MSK_MASK,
.reg_offset = 1,
},
[TPS65911_IRQ_GPIO1_F] = {
.mask = INT_MSK2_GPIO1_F_IT_MSK_MASK,
.reg_offset = 1,
},
[TPS65911_IRQ_GPIO2_R] = {
.mask = INT_MSK2_GPIO2_R_IT_MSK_MASK,
.reg_offset = 1,
},
[TPS65911_IRQ_GPIO2_F] = {
.mask = INT_MSK2_GPIO2_F_IT_MSK_MASK,
.reg_offset = 1,
},
[TPS65911_IRQ_GPIO3_R] = {
.mask = INT_MSK2_GPIO3_R_IT_MSK_MASK,
.reg_offset = 1,
},
[TPS65911_IRQ_GPIO3_F] = {
.mask = INT_MSK2_GPIO3_F_IT_MSK_MASK,
.reg_offset = 1,
},
/* INT_STS2 */
[TPS65911_IRQ_GPIO4_R] = {
.mask = INT_MSK3_GPIO4_R_IT_MSK_MASK,
.reg_offset = 2,
},
[TPS65911_IRQ_GPIO4_F] = {
.mask = INT_MSK3_GPIO4_F_IT_MSK_MASK,
.reg_offset = 2,
},
[TPS65911_IRQ_GPIO5_R] = {
.mask = INT_MSK3_GPIO5_R_IT_MSK_MASK,
.reg_offset = 2,
},
[TPS65911_IRQ_GPIO5_F] = {
.mask = INT_MSK3_GPIO5_F_IT_MSK_MASK,
.reg_offset = 2,
},
[TPS65911_IRQ_WTCHDG] = {
.mask = INT_MSK3_WTCHDG_IT_MSK_MASK,
.reg_offset = 2,
},
[TPS65911_IRQ_VMBCH2_H] = {
.mask = INT_MSK3_VMBCH2_H_IT_MSK_MASK,
.reg_offset = 2,
},
[TPS65911_IRQ_VMBCH2_L] = {
.mask = INT_MSK3_VMBCH2_L_IT_MSK_MASK,
.reg_offset = 2,
},
[TPS65911_IRQ_PWRDN] = {
.mask = INT_MSK3_PWRDN_IT_MSK_MASK,
.reg_offset = 2,
},
};
static const struct regmap_irq tps65910_irqs[] = {
/* INT_STS */
[TPS65910_IRQ_VBAT_VMBDCH] = {
.mask = TPS65910_INT_MSK_VMBDCH_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65910_IRQ_VBAT_VMHI] = {
.mask = TPS65910_INT_MSK_VMBHI_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65910_IRQ_PWRON] = {
.mask = TPS65910_INT_MSK_PWRON_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65910_IRQ_PWRON_LP] = {
.mask = TPS65910_INT_MSK_PWRON_LP_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65910_IRQ_PWRHOLD] = {
.mask = TPS65910_INT_MSK_PWRHOLD_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65910_IRQ_HOTDIE] = {
.mask = TPS65910_INT_MSK_HOTDIE_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65910_IRQ_RTC_ALARM] = {
.mask = TPS65910_INT_MSK_RTC_ALARM_IT_MSK_MASK,
.reg_offset = 0,
},
[TPS65910_IRQ_RTC_PERIOD] = {
.mask = TPS65910_INT_MSK_RTC_PERIOD_IT_MSK_MASK,
.reg_offset = 0,
},
/* INT_STS2 */
[TPS65910_IRQ_GPIO_R] = {
.mask = TPS65910_INT_MSK2_GPIO0_F_IT_MSK_MASK,
.reg_offset = 1,
},
[TPS65910_IRQ_GPIO_F] = {
.mask = TPS65910_INT_MSK2_GPIO0_R_IT_MSK_MASK,
.reg_offset = 1,
},
};
static struct regmap_irq_chip tps65911_irq_chip = {
.name = "tps65910",
.irqs = tps65911_irqs,
.num_irqs = ARRAY_SIZE(tps65911_irqs),
.num_regs = 3,
.irq_reg_stride = 2,
.status_base = TPS65910_INT_STS,
.mask_base = TPS65910_INT_MSK,
.ack_base = TPS65910_INT_STS,
};
static struct regmap_irq_chip tps65910_irq_chip = {
.name = "tps65910",
.irqs = tps65910_irqs,
.num_irqs = ARRAY_SIZE(tps65910_irqs),
.num_regs = 2,
.irq_reg_stride = 2,
.status_base = TPS65910_INT_STS,
.mask_base = TPS65910_INT_MSK,
.ack_base = TPS65910_INT_STS,
};
static int tps65910_irq_init(struct tps65910 *tps65910, int irq,
struct tps65910_platform_data *pdata)
{
int ret;
static struct regmap_irq_chip *tps6591x_irqs_chip;
if (!irq) {
dev_warn(tps65910->dev, "No interrupt support, no core IRQ\n");
return -EINVAL;
}
if (!pdata) {
dev_warn(tps65910->dev, "No interrupt support, no pdata\n");
return -EINVAL;
}
switch (tps65910_chip_id(tps65910)) {
case TPS65910:
tps6591x_irqs_chip = &tps65910_irq_chip;
break;
case TPS65911:
tps6591x_irqs_chip = &tps65911_irq_chip;
break;
}
tps65910->chip_irq = irq;
ret = devm_regmap_add_irq_chip(tps65910->dev, tps65910->regmap,
tps65910->chip_irq,
IRQF_ONESHOT, pdata->irq_base,
tps6591x_irqs_chip, &tps65910->irq_data);
if (ret < 0) {
dev_warn(tps65910->dev, "Failed to add irq_chip %d\n", ret);
tps65910->chip_irq = 0;
}
return ret;
}
static bool is_volatile_reg(struct device *dev, unsigned int reg)
{
struct tps65910 *tps65910 = dev_get_drvdata(dev);
/*
* Caching all regulator registers.
* All regualator register address range is same for
* TPS65910 and TPS65911
*/
if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
/* Check for non-existing register */
if (tps65910_chip_id(tps65910) == TPS65910)
if ((reg == TPS65911_VDDCTRL_OP) ||
(reg == TPS65911_VDDCTRL_SR))
return true;
return false;
}
return true;
}
static const struct regmap_config tps65910_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.volatile_reg = is_volatile_reg,
.max_register = TPS65910_MAX_REGISTER - 1,
.cache_type = REGCACHE_RBTREE,
};
static int tps65910_ck32k_init(struct tps65910 *tps65910,
struct tps65910_board *pmic_pdata)
{
int ret;
if (!pmic_pdata->en_ck32k_xtal)
return 0;
ret = regmap_clear_bits(tps65910->regmap, TPS65910_DEVCTRL,
DEVCTRL_CK32K_CTRL_MASK);
if (ret < 0) {
dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret);
return ret;
}
return 0;
}
static int tps65910_sleepinit(struct tps65910 *tps65910,
struct tps65910_board *pmic_pdata)
{
struct device *dev;
int ret;
if (!pmic_pdata->en_dev_slp)
return 0;
dev = tps65910->dev;
/* enabling SLEEP device state */
ret = regmap_set_bits(tps65910->regmap, TPS65910_DEVCTRL,
DEVCTRL_DEV_SLP_MASK);
if (ret < 0) {
dev_err(dev, "set dev_slp failed: %d\n", ret);
goto err_sleep_init;
}
if (pmic_pdata->slp_keepon.therm_keepon) {
ret = regmap_set_bits(tps65910->regmap,
TPS65910_SLEEP_KEEP_RES_ON,
SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK);
if (ret < 0) {
dev_err(dev, "set therm_keepon failed: %d\n", ret);
goto disable_dev_slp;
}
}
if (pmic_pdata->slp_keepon.clkout32k_keepon) {
ret = regmap_set_bits(tps65910->regmap,
TPS65910_SLEEP_KEEP_RES_ON,
SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK);
if (ret < 0) {
dev_err(dev, "set clkout32k_keepon failed: %d\n", ret);
goto disable_dev_slp;
}
}
if (pmic_pdata->slp_keepon.i2chs_keepon) {
ret = regmap_set_bits(tps65910->regmap,
TPS65910_SLEEP_KEEP_RES_ON,
SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK);
if (ret < 0) {
dev_err(dev, "set i2chs_keepon failed: %d\n", ret);
goto disable_dev_slp;
}
}
return 0;
disable_dev_slp:
regmap_clear_bits(tps65910->regmap, TPS65910_DEVCTRL,
DEVCTRL_DEV_SLP_MASK);
err_sleep_init:
return ret;
}
#ifdef CONFIG_OF
static const struct of_device_id tps65910_of_match[] = {
{ .compatible = "ti,tps65910", .data = (void *)TPS65910},
{ .compatible = "ti,tps65911", .data = (void *)TPS65911},
{ },
};
static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
unsigned long *chip_id)
{
struct device_node *np = client->dev.of_node;
struct tps65910_board *board_info;
unsigned int prop;
const struct of_device_id *match;
int ret;
match = of_match_device(tps65910_of_match, &client->dev);
if (!match) {
dev_err(&client->dev, "Failed to find matching dt id\n");
return NULL;
}
*chip_id = (unsigned long)match->data;
board_info = devm_kzalloc(&client->dev, sizeof(*board_info),
GFP_KERNEL);
if (!board_info)
return NULL;
ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop);
if (!ret)
board_info->vmbch_threshold = prop;
ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop);
if (!ret)
board_info->vmbch2_threshold = prop;
prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
board_info->en_ck32k_xtal = prop;
prop = of_property_read_bool(np, "ti,sleep-enable");
board_info->en_dev_slp = prop;
prop = of_property_read_bool(np, "ti,sleep-keep-therm");
board_info->slp_keepon.therm_keepon = prop;
prop = of_property_read_bool(np, "ti,sleep-keep-ck32k");
board_info->slp_keepon.clkout32k_keepon = prop;
prop = of_property_read_bool(np, "ti,sleep-keep-hsclk");
board_info->slp_keepon.i2chs_keepon = prop;
board_info->irq = client->irq;
board_info->irq_base = -1;
board_info->pm_off = of_property_read_bool(np,
"ti,system-power-controller");
return board_info;
}
#else
static inline
struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
unsigned long *chip_id)
{
return NULL;
}
#endif
static struct i2c_client *tps65910_i2c_client;
static void tps65910_power_off(void)
{
struct tps65910 *tps65910;
tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev);
regmap_update_bits(tps65910->regmap, TPS65910_DEVCTRL,
DEVCTRL_DEV_OFF_MASK | DEVCTRL_DEV_ON_MASK,
DEVCTRL_DEV_OFF_MASK);
}
static int tps65910_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct tps65910 *tps65910;
struct tps65910_board *pmic_plat_data;
struct tps65910_board *of_pmic_plat_data = NULL;
struct tps65910_platform_data *init_data;
unsigned long chip_id = id->driver_data;
int ret;
pmic_plat_data = dev_get_platdata(&i2c->dev);
if (!pmic_plat_data && i2c->dev.of_node) {
pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
of_pmic_plat_data = pmic_plat_data;
}
if (!pmic_plat_data)
return -EINVAL;
init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
if (init_data == NULL)
return -ENOMEM;
tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
if (tps65910 == NULL)
return -ENOMEM;
tps65910->of_plat_data = of_pmic_plat_data;
i2c_set_clientdata(i2c, tps65910);
tps65910->dev = &i2c->dev;
tps65910->i2c_client = i2c;
tps65910->id = chip_id;
/* Work around silicon erratum SWCZ010: the tps65910 may miss the
* first I2C transfer. So issue a dummy transfer before the first
* real transfer.
*/
i2c_master_send(i2c, "", 1);
tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
if (IS_ERR(tps65910->regmap)) {
ret = PTR_ERR(tps65910->regmap);
dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
return ret;
}
init_data->irq = pmic_plat_data->irq;
init_data->irq_base = pmic_plat_data->irq_base;
tps65910_irq_init(tps65910, init_data->irq, init_data);
tps65910_ck32k_init(tps65910, pmic_plat_data);
tps65910_sleepinit(tps65910, pmic_plat_data);
if (pmic_plat_data->pm_off && !pm_power_off) {
/*
* The PWR_OFF bit needs to be set separately, before
* transitioning to the OFF state. It enables the "sequential"
* power-off mode on TPS65911, it's a NO-OP on TPS65910.
*/
ret = regmap_set_bits(tps65910->regmap, TPS65910_DEVCTRL,
DEVCTRL_PWR_OFF_MASK);
if (ret) {
dev_err(&i2c->dev, "failed to set power-off mode: %d\n",
ret);
return ret;
}
tps65910_i2c_client = i2c;
pm_power_off = tps65910_power_off;
}
ret = devm_mfd_add_devices(tps65910->dev, -1,
tps65910s, ARRAY_SIZE(tps65910s),
NULL, 0,
regmap_irq_get_domain(tps65910->irq_data));
if (ret < 0) {
dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
return ret;
}
return ret;
}
static const struct i2c_device_id tps65910_i2c_id[] = {
{ "tps65910", TPS65910 },
{ "tps65911", TPS65911 },
{ }
};
static struct i2c_driver tps65910_i2c_driver = {
.driver = {
.name = "tps65910",
.of_match_table = of_match_ptr(tps65910_of_match),
},
.probe = tps65910_i2c_probe,
.id_table = tps65910_i2c_id,
};
static int __init tps65910_i2c_init(void)
{
return i2c_add_driver(&tps65910_i2c_driver);
}
/* init early so consumer devices can complete system boot */
subsys_initcall(tps65910_i2c_init);
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