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power: pmic: axp: Implement poweroff via sysreset

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The AXP PMICs have the ability to power off the system. The existing
code for this is duplicated for each PMIC variant, and uses the legacy
non-DM "pmic_bus" interface. When SYSRESET is enabled, this can all be
replaced with a sysreset device using the DM_PMIC interface.

Since the trigger bit is the same on all PMIC variants, use the register
definitions from the oldest supported PMIC.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
This commit is contained in:
Samuel Holland 2021-10-24 21:00:10 -05:00 committed by Andre Przywara
parent 830e161eb4
commit 95d9ffd7b6
2 changed files with 50 additions and 1 deletions
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2
drivers/power/pmic/Kconfig
View File

@ -66,6 +66,8 @@ config PMIC_ACT8846
config PMIC_AXP
bool "Enable Driver Model for X-Powers AXP PMICs"
depends on DM_I2C
select SYSRESET_CMD_POWEROFF if SYSRESET && CMD_POWEROFF
imply CMD_POWEROFF if SYSRESET
help
This config enables driver-model PMIC uclass features for
X-Powers AXP152, AXP2xx, and AXP8xx PMICs.

49
drivers/power/pmic/axp.c
View File

@ -1,8 +1,37 @@
// SPDX-License-Identifier: GPL-2.0+
#include <axp_pmic.h>
#include <dm.h>
#include <dm/lists.h>
#include <i2c.h>
#include <power/pmic.h>
#include <sysreset.h>
#if CONFIG_IS_ENABLED(SYSRESET)
static int axp_sysreset_request(struct udevice *dev, enum sysreset_t type)
{
int ret;
if (type != SYSRESET_POWER_OFF)
return -EPROTONOSUPPORT;
ret = pmic_clrsetbits(dev->parent, AXP152_SHUTDOWN, 0, AXP152_POWEROFF);
if (ret < 0)
return ret;
return -EINPROGRESS;
}
static struct sysreset_ops axp_sysreset_ops = {
.request = axp_sysreset_request,
};
U_BOOT_DRIVER(axp_sysreset) = {
.name = "axp_sysreset",
.id = UCLASS_SYSRESET,
.ops = &axp_sysreset_ops,
};
#endif
static int axp_pmic_reg_count(struct udevice *dev)
{
@ -16,6 +45,24 @@ static struct dm_pmic_ops axp_pmic_ops = {
.write = dm_i2c_write,
};
static int axp_pmic_bind(struct udevice *dev)
{
int ret;
ret = dm_scan_fdt_dev(dev);
if (ret)
return ret;
if (CONFIG_IS_ENABLED(SYSRESET)) {
ret = device_bind_driver_to_node(dev, "axp_sysreset", "axp_sysreset",
dev_ofnode(dev), NULL);
if (ret)
return ret;
}
return 0;
}
static const struct udevice_id axp_pmic_ids[] = {
{ .compatible = "x-powers,axp152" },
{ .compatible = "x-powers,axp202" },
@ -33,6 +80,6 @@ U_BOOT_DRIVER(axp_pmic) = {
.name = "axp_pmic",
.id = UCLASS_PMIC,
.of_match = axp_pmic_ids,
.bind = dm_scan_fdt_dev,
.bind = axp_pmic_bind,
.ops = &axp_pmic_ops,
};