[PATCH v2 1/9] power: pmic-uclass: implement poweroff ops

[Svyatoslav Ryhel]

PMICs are responsible for device poweroff sequence so lets implement
this function.

Signed-off-by: Svyatoslav Ryhel <clamor95 at gmail.com>
---
 drivers/power/pmic/pmic-uclass.c | 12 ++++++++++++
 include/power/pmic.h             | 13 +++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/drivers/power/pmic/pmic-uclass.c b/drivers/power/pmic/pmic-uclass.c
index 0e2f5e1f41..23803bc96a 100644
--- a/drivers/power/pmic/pmic-uclass.c
+++ b/drivers/power/pmic/pmic-uclass.c
@@ -99,6 +99,18 @@ int pmic_get(const char *name, struct udevice **devp)
 	return uclass_get_device_by_name(UCLASS_PMIC, name, devp);
 }
 
+int pmic_poweroff(struct udevice *dev)
+{
+	const struct dm_pmic_ops *ops = dev_get_driver_ops(dev);
+	struct uc_pmic_priv *priv = dev_get_uclass_priv(dev);
+
+	if (!ops || !ops->poweroff ||
+	    !priv->sys_pow_ctrl)
+		return -ENOSYS;
+
+	return ops->poweroff(dev);
+}
+
 int pmic_reg_count(struct udevice *dev)
 {
 	const struct dm_pmic_ops *ops = dev_get_driver_ops(dev);
diff --git a/include/power/pmic.h b/include/power/pmic.h
index 636221692d..d8dd1ceaa3 100644
--- a/include/power/pmic.h
+++ b/include/power/pmic.h
@@ -157,11 +157,13 @@ struct pmic {
  * Should be implemented by UCLASS_PMIC device drivers. The standard
  * device operations provides the I/O interface for it's childs.
  *
+ * @poweroff:  perform poweroff sequence
  * @reg_count: device's register count
  * @read:      read 'len' bytes at "reg" and store it into the 'buffer'
  * @write:     write 'len' bytes from the 'buffer' to the register at 'reg' address
  */
 struct dm_pmic_ops {
+	int (*poweroff)(struct udevice *dev);
 	int (*reg_count)(struct udevice *dev);
 	int (*read)(struct udevice *dev, uint reg, uint8_t *buffer, int len);
 	int (*write)(struct udevice *dev, uint reg, const uint8_t *buffer,
@@ -242,6 +244,16 @@ int pmic_bind_children(struct udevice *pmic, ofnode parent,
  */
 int pmic_get(const char *name, struct udevice **devp);
 
+/**
+ * pmic_poweroff: call the pmic poweroff sequence
+ *
+ * The required pmic device can be obtained by 'pmic_get()'
+ *
+ * @dev - pointer to the UCLASS_PMIC device
+ * Return: device turns off or negative value of errno.
+ */
+int pmic_poweroff(struct udevice *dev);
+
 /**
  * pmic_reg_count: get the pmic register count
  *
@@ -306,6 +318,7 @@ int pmic_clrsetbits(struct udevice *dev, uint reg, uint clr, uint set);
  */
 struct uc_pmic_priv {
 	uint trans_len;
+	bool sys_pow_ctrl;
 };
 
 #endif /* DM_PMIC */
-- 
2.39.2