sysreset: implement PALMAS sysreset functions
PALMAS PMIC family has embedded poweroff function used by some
device to initiane device power off. Implement it as sysreset
driver.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
diff --git a/drivers/sysreset/sysreset_palmas.c b/drivers/sysreset/sysreset_palmas.c
new file mode 100644
index 0000000..9e3aa40
--- /dev/null
+++ b/drivers/sysreset/sysreset_palmas.c
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright(C) 2023 Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#include <dm.h>
+#include <i2c.h>
+#include <errno.h>
+#include <sysreset.h>
+#include <power/pmic.h>
+#include <power/palmas.h>
+
+static int palmas_sysreset_request(struct udevice *dev,
+ enum sysreset_t type)
+{
+ struct palmas_priv *priv = dev_get_priv(dev->parent);
+ int ret;
+
+ /*
+ * Mask INT3 on second page which detects vbus
+ * or device will immediately turn on.
+ */
+ ret = dm_i2c_reg_clrset(priv->chip2, PALMAS_INT3_MASK,
+ MASK_VBUS, MASK_VBUS);
+ if (ret < 0)
+ return ret;
+
+ switch (type) {
+ case SYSRESET_POWER:
+ /* PALMAS: SW_RST > DEV_CTRL */
+ pmic_reg_write(dev->parent, PALMAS_DEV_CTRL, SW_RST);
+ break;
+ case SYSRESET_POWER_OFF:
+ /* PALMAS: DEV_OFF > DEV_CTRL */
+ pmic_reg_write(dev->parent, PALMAS_DEV_CTRL, DEV_OFF);
+ break;
+ default:
+ return -EPROTONOSUPPORT;
+ }
+
+ return -EINPROGRESS;
+}
+
+static struct sysreset_ops palmas_sysreset = {
+ .request = palmas_sysreset_request,
+};
+
+U_BOOT_DRIVER(sysreset_palmas) = {
+ .id = UCLASS_SYSRESET,
+ .name = PALMAS_RST_DRIVER,
+ .ops = &palmas_sysreset,
+};