power: pmic: axp: Implement poweroff via sysreset

[platform/kernel/u-boot.git] / drivers / power / pmic / axp.c

diff --git a/drivers/power/pmic/axp.c b/drivers/power/pmic/axp.c
index 74c94bd..0f2b24a 100644 (file)
--- 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 @@ 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,
 };