power: pmic: axp: Implement poweroff via sysreset
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>
diff --git a/drivers/power/pmic/axp.c b/drivers/power/pmic/axp.c
index 74c94bd..0f2b24a 100644
--- a/drivers/power/pmic/axp.c
+++ b/drivers/power/pmic/axp.c
@@ -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 @@
.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 @@
.name = "axp_pmic",
.id = UCLASS_PMIC,
.of_match = axp_pmic_ids,
- .bind = dm_scan_fdt_dev,
+ .bind = axp_pmic_bind,
.ops = &axp_pmic_ops,
};