power: reset: Add poweroff driver for ATC260x PMICs
This driver provides poweroff and reboot support for a system through the ATC2603C and ATC2609A chip variants of the Actions Semi ATC260x family of PMICs. Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@gmail.com> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Cristian Ciocaltea
Sebastian Reichel
parent
2f7cf24f42
commit
3235d13050
|
|
@ -39,6 +39,13 @@ config POWER_RESET_AT91_SAMA5D2_SHDWC
|
|||
This driver supports the alternate shutdown controller for some Atmel
|
||||
SAMA5 SoCs. It is present for example on SAMA5D2 SoC.
|
||||
|
||||
config POWER_RESET_ATC260X
|
||||
tristate "Actions Semi ATC260x PMIC power-off driver"
|
||||
depends on MFD_ATC260X
|
||||
help
|
||||
This driver provides power-off and restart support for a system
|
||||
through Actions Semi ATC260x series PMICs.
|
||||
|
||||
config POWER_RESET_AXXIA
|
||||
bool "LSI Axxia reset driver"
|
||||
depends on ARCH_AXXIA
|
||||
|
|
@ -292,4 +299,3 @@ config NVMEM_REBOOT_MODE
|
|||
action according to the mode.
|
||||
|
||||
endif
|
||||
|
||||
|
|
|
|||
|
|
@ -3,6 +3,7 @@ obj-$(CONFIG_POWER_RESET_AS3722) += as3722-poweroff.o
|
|||
obj-$(CONFIG_POWER_RESET_AT91_POWEROFF) += at91-poweroff.o
|
||||
obj-$(CONFIG_POWER_RESET_AT91_RESET) += at91-reset.o
|
||||
obj-$(CONFIG_POWER_RESET_AT91_SAMA5D2_SHDWC) += at91-sama5d2_shdwc.o
|
||||
obj-$(CONFIG_POWER_RESET_ATC260X) += atc260x-poweroff.o
|
||||
obj-$(CONFIG_POWER_RESET_AXXIA) += axxia-reset.o
|
||||
obj-$(CONFIG_POWER_RESET_BRCMKONA) += brcm-kona-reset.o
|
||||
obj-$(CONFIG_POWER_RESET_BRCMSTB) += brcmstb-reboot.o
|
||||
|
|
|
|||
|
|
@ -0,0 +1,262 @@
|
|||
// SPDX-License-Identifier: GPL-2.0+
|
||||
/*
|
||||
* Poweroff & reset driver for Actions Semi ATC260x PMICs
|
||||
*
|
||||
* Copyright (c) 2020 Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
|
||||
*/
|
||||
|
||||
#include <linux/delay.h>
|
||||
#include <linux/mfd/atc260x/core.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/power_supply.h>
|
||||
#include <linux/reboot.h>
|
||||
#include <linux/regmap.h>
|
||||
|
||||
struct atc260x_pwrc {
|
||||
struct device *dev;
|
||||
struct regmap *regmap;
|
||||
struct notifier_block restart_nb;
|
||||
int (*do_poweroff)(const struct atc260x_pwrc *pwrc, bool restart);
|
||||
};
|
||||
|
||||
/* Global variable needed only for pm_power_off */
|
||||
static struct atc260x_pwrc *atc260x_pwrc_data;
|
||||
|
||||
static int atc2603c_do_poweroff(const struct atc260x_pwrc *pwrc, bool restart)
|
||||
{
|
||||
int ret, deep_sleep = 0;
|
||||
uint reg_mask, reg_val;
|
||||
|
||||
/* S4-Deep Sleep Mode is NOT available for WALL/USB power */
|
||||
if (!restart && !power_supply_is_system_supplied()) {
|
||||
deep_sleep = 1;
|
||||
dev_info(pwrc->dev, "Enabling S4-Deep Sleep Mode");
|
||||
}
|
||||
|
||||
/* Update wakeup sources */
|
||||
reg_val = ATC2603C_PMU_SYS_CTL0_ONOFF_LONG_WK_EN |
|
||||
(restart ? ATC2603C_PMU_SYS_CTL0_RESET_WK_EN
|
||||
: ATC2603C_PMU_SYS_CTL0_ONOFF_SHORT_WK_EN);
|
||||
|
||||
ret = regmap_update_bits(pwrc->regmap, ATC2603C_PMU_SYS_CTL0,
|
||||
ATC2603C_PMU_SYS_CTL0_WK_ALL, reg_val);
|
||||
if (ret)
|
||||
dev_warn(pwrc->dev, "failed to write SYS_CTL0: %d\n", ret);
|
||||
|
||||
/* Update power mode */
|
||||
reg_mask = ATC2603C_PMU_SYS_CTL3_EN_S2 | ATC2603C_PMU_SYS_CTL3_EN_S3;
|
||||
|
||||
ret = regmap_update_bits(pwrc->regmap, ATC2603C_PMU_SYS_CTL3, reg_mask,
|
||||
deep_sleep ? 0 : ATC2603C_PMU_SYS_CTL3_EN_S3);
|
||||
if (ret) {
|
||||
dev_err(pwrc->dev, "failed to write SYS_CTL3: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Trigger poweroff / restart sequence */
|
||||
reg_mask = restart ? ATC2603C_PMU_SYS_CTL0_RESTART_EN
|
||||
: ATC2603C_PMU_SYS_CTL1_EN_S1;
|
||||
reg_val = restart ? ATC2603C_PMU_SYS_CTL0_RESTART_EN : 0;
|
||||
|
||||
ret = regmap_update_bits(pwrc->regmap,
|
||||
restart ? ATC2603C_PMU_SYS_CTL0 : ATC2603C_PMU_SYS_CTL1,
|
||||
reg_mask, reg_val);
|
||||
if (ret) {
|
||||
dev_err(pwrc->dev, "failed to write SYS_CTL%d: %d\n",
|
||||
restart ? 0 : 1, ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Wait for trigger completion */
|
||||
mdelay(200);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int atc2609a_do_poweroff(const struct atc260x_pwrc *pwrc, bool restart)
|
||||
{
|
||||
int ret, deep_sleep = 0;
|
||||
uint reg_mask, reg_val;
|
||||
|
||||
/* S4-Deep Sleep Mode is NOT available for WALL/USB power */
|
||||
if (!restart && !power_supply_is_system_supplied()) {
|
||||
deep_sleep = 1;
|
||||
dev_info(pwrc->dev, "Enabling S4-Deep Sleep Mode");
|
||||
}
|
||||
|
||||
/* Update wakeup sources */
|
||||
reg_val = ATC2609A_PMU_SYS_CTL0_ONOFF_LONG_WK_EN |
|
||||
(restart ? ATC2609A_PMU_SYS_CTL0_RESET_WK_EN
|
||||
: ATC2609A_PMU_SYS_CTL0_ONOFF_SHORT_WK_EN);
|
||||
|
||||
ret = regmap_update_bits(pwrc->regmap, ATC2609A_PMU_SYS_CTL0,
|
||||
ATC2609A_PMU_SYS_CTL0_WK_ALL, reg_val);
|
||||
if (ret)
|
||||
dev_warn(pwrc->dev, "failed to write SYS_CTL0: %d\n", ret);
|
||||
|
||||
/* Update power mode */
|
||||
reg_mask = ATC2609A_PMU_SYS_CTL3_EN_S2 | ATC2609A_PMU_SYS_CTL3_EN_S3;
|
||||
|
||||
ret = regmap_update_bits(pwrc->regmap, ATC2609A_PMU_SYS_CTL3, reg_mask,
|
||||
deep_sleep ? 0 : ATC2609A_PMU_SYS_CTL3_EN_S3);
|
||||
if (ret) {
|
||||
dev_err(pwrc->dev, "failed to write SYS_CTL3: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Trigger poweroff / restart sequence */
|
||||
reg_mask = restart ? ATC2609A_PMU_SYS_CTL0_RESTART_EN
|
||||
: ATC2609A_PMU_SYS_CTL1_EN_S1;
|
||||
reg_val = restart ? ATC2609A_PMU_SYS_CTL0_RESTART_EN : 0;
|
||||
|
||||
ret = regmap_update_bits(pwrc->regmap,
|
||||
restart ? ATC2609A_PMU_SYS_CTL0 : ATC2609A_PMU_SYS_CTL1,
|
||||
reg_mask, reg_val);
|
||||
if (ret) {
|
||||
dev_err(pwrc->dev, "failed to write SYS_CTL%d: %d\n",
|
||||
restart ? 0 : 1, ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Wait for trigger completion */
|
||||
mdelay(200);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int atc2603c_init(const struct atc260x_pwrc *pwrc)
|
||||
{
|
||||
int ret;
|
||||
|
||||
/*
|
||||
* Delay transition from S2/S3 to S1 in order to avoid
|
||||
* DDR init failure in Bootloader.
|
||||
*/
|
||||
ret = regmap_update_bits(pwrc->regmap, ATC2603C_PMU_SYS_CTL3,
|
||||
ATC2603C_PMU_SYS_CTL3_S2S3TOS1_TIMER_EN,
|
||||
ATC2603C_PMU_SYS_CTL3_S2S3TOS1_TIMER_EN);
|
||||
if (ret)
|
||||
dev_warn(pwrc->dev, "failed to write SYS_CTL3: %d\n", ret);
|
||||
|
||||
/* Set wakeup sources */
|
||||
ret = regmap_update_bits(pwrc->regmap, ATC2603C_PMU_SYS_CTL0,
|
||||
ATC2603C_PMU_SYS_CTL0_WK_ALL,
|
||||
ATC2603C_PMU_SYS_CTL0_HDSW_WK_EN |
|
||||
ATC2603C_PMU_SYS_CTL0_ONOFF_LONG_WK_EN);
|
||||
if (ret)
|
||||
dev_warn(pwrc->dev, "failed to write SYS_CTL0: %d\n", ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int atc2609a_init(const struct atc260x_pwrc *pwrc)
|
||||
{
|
||||
int ret;
|
||||
|
||||
/* Set wakeup sources */
|
||||
ret = regmap_update_bits(pwrc->regmap, ATC2609A_PMU_SYS_CTL0,
|
||||
ATC2609A_PMU_SYS_CTL0_WK_ALL,
|
||||
ATC2609A_PMU_SYS_CTL0_HDSW_WK_EN |
|
||||
ATC2609A_PMU_SYS_CTL0_ONOFF_LONG_WK_EN);
|
||||
if (ret)
|
||||
dev_warn(pwrc->dev, "failed to write SYS_CTL0: %d\n", ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void atc260x_pwrc_pm_handler(void)
|
||||
{
|
||||
atc260x_pwrc_data->do_poweroff(atc260x_pwrc_data, false);
|
||||
|
||||
WARN_ONCE(1, "Unable to power off system\n");
|
||||
}
|
||||
|
||||
static int atc260x_pwrc_restart_handler(struct notifier_block *nb,
|
||||
unsigned long mode, void *cmd)
|
||||
{
|
||||
struct atc260x_pwrc *pwrc = container_of(nb, struct atc260x_pwrc,
|
||||
restart_nb);
|
||||
pwrc->do_poweroff(pwrc, true);
|
||||
|
||||
return NOTIFY_DONE;
|
||||
}
|
||||
|
||||
static int atc260x_pwrc_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct atc260x *atc260x = dev_get_drvdata(pdev->dev.parent);
|
||||
struct atc260x_pwrc *priv;
|
||||
int ret;
|
||||
|
||||
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
|
||||
if (!priv)
|
||||
return -ENOMEM;
|
||||
|
||||
priv->dev = &pdev->dev;
|
||||
priv->regmap = atc260x->regmap;
|
||||
priv->restart_nb.notifier_call = atc260x_pwrc_restart_handler;
|
||||
priv->restart_nb.priority = 192;
|
||||
|
||||
switch (atc260x->ic_type) {
|
||||
case ATC2603C:
|
||||
priv->do_poweroff = atc2603c_do_poweroff;
|
||||
ret = atc2603c_init(priv);
|
||||
break;
|
||||
case ATC2609A:
|
||||
priv->do_poweroff = atc2609a_do_poweroff;
|
||||
ret = atc2609a_init(priv);
|
||||
break;
|
||||
default:
|
||||
dev_err(priv->dev,
|
||||
"Poweroff not supported for ATC260x PMIC type: %u\n",
|
||||
atc260x->ic_type);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
platform_set_drvdata(pdev, priv);
|
||||
|
||||
if (!pm_power_off) {
|
||||
atc260x_pwrc_data = priv;
|
||||
pm_power_off = atc260x_pwrc_pm_handler;
|
||||
} else {
|
||||
dev_warn(priv->dev, "Poweroff callback already assigned\n");
|
||||
}
|
||||
|
||||
ret = register_restart_handler(&priv->restart_nb);
|
||||
if (ret)
|
||||
dev_err(priv->dev, "failed to register restart handler: %d\n",
|
||||
ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int atc260x_pwrc_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct atc260x_pwrc *priv = platform_get_drvdata(pdev);
|
||||
|
||||
if (atc260x_pwrc_data == priv) {
|
||||
pm_power_off = NULL;
|
||||
atc260x_pwrc_data = NULL;
|
||||
}
|
||||
|
||||
unregister_restart_handler(&priv->restart_nb);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver atc260x_pwrc_driver = {
|
||||
.probe = atc260x_pwrc_probe,
|
||||
.remove = atc260x_pwrc_remove,
|
||||
.driver = {
|
||||
.name = "atc260x-pwrc",
|
||||
},
|
||||
};
|
||||
|
||||
module_platform_driver(atc260x_pwrc_driver);
|
||||
|
||||
MODULE_DESCRIPTION("Poweroff & reset driver for ATC260x PMICs");
|
||||
MODULE_AUTHOR("Cristian Ciocaltea <cristian.ciocaltea@gmail.com>");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue