sysreset: implement TPS65910 sysreset functions

TPS65910/TPS65911 PMICs have embedded power control functions
used by some device to initiane device power off. Implement it as
sysreset driver.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/drivers/sysreset/sysreset_tps65910.c b/drivers/sysreset/sysreset_tps65910.c
new file mode 100644
index 0000000000..98da56661c
--- /dev/null
+++ b/drivers/sysreset/sysreset_tps65910.c
@@ -0,0 +1,54 @@
+// 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/tps65910_pmic.h>
+
+static int tps65910_sysreset_request(struct udevice *dev,
+				     enum sysreset_t type)
+{
+	int val;
+
+	val = pmic_reg_read(dev->parent, TPS65910_REG_DEVICE_CTRL);
+	if (val < 0)
+		return val;
+
+	/* define power-off to be sequential */
+	val |= PWR_OFF_SEQ;
+	pmic_reg_write(dev->parent, TPS65910_REG_DEVICE_CTRL, val);
+
+	val &= ~DEV_ON;
+
+	switch (type) {
+	case SYSRESET_POWER:
+		/* TPS65910: DEV_OFF_RST > DEVICE_CTRL */
+		pmic_reg_write(dev->parent, TPS65910_REG_DEVICE_CTRL,
+			       val | DEV_OFF_RST);
+		break;
+	case SYSRESET_POWER_OFF:
+		/* TPS65910: DEV_OFF > DEVICE_CTRL */
+		pmic_reg_write(dev->parent, TPS65910_REG_DEVICE_CTRL,
+			       val | DEV_OFF);
+		break;
+	default:
+		return -EPROTONOSUPPORT;
+	}
+
+	return -EINPROGRESS;
+}
+
+static struct sysreset_ops tps65910_sysreset = {
+	.request = tps65910_sysreset_request,
+};
+
+U_BOOT_DRIVER(sysreset_tps65910) = {
+	.id	= UCLASS_SYSRESET,
+	.name	= TPS65910_RST_DRIVER,
+	.ops	= &tps65910_sysreset,
+};