From e8cb4e78c7dcd51f5ef92f465919ce19f8a0356f Mon Sep 17 00:00:00 2001
From: Lukasz Majewski <lukma@denx.de>
Date: Sat, 12 Mar 2022 08:11:11 +0100
Subject: [PATCH] power: pmic: Provide DM_PMIC support for tps65217 driver

The tps65217 PMIC driver is used with am335x SoC based designs.

It is used in the SPL (MLO) as well, so the DM conversion only is
for u-boot proper.

This driver only allows simple reading/writing/dumping of the content
of its registers and requires the DM_I2C for proper operation.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
---
 drivers/power/pmic/pmic_tps65217.c | 82 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)

diff --git a/drivers/power/pmic/pmic_tps65217.c b/drivers/power/pmic/pmic_tps65217.c
index c7f532d..ccbf223 100644
--- a/drivers/power/pmic/pmic_tps65217.c
+++ b/drivers/power/pmic/pmic_tps65217.c
@@ -6,8 +6,13 @@
 
 #include <common.h>
 #include <i2c.h>
+#include <dm.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <power/pmic.h>
 #include <power/tps65217.h>
 
+#if !CONFIG_IS_ENABLED(DM_PMIC)
 struct udevice *tps65217_dev __section(".data") = NULL;
 
 /**
@@ -148,3 +153,80 @@ int power_tps65217_init(unsigned char bus)
 #endif
 	return 0;
 }
+#else /* CONFIG_IS_ENABLED(DM_PMIC) */
+static const struct pmic_child_info pmic_children_info[] = {
+	{ .prefix = "ldo", .driver = "tps65217_ldo" },
+	{ },
+};
+
+static int tps65217_reg_count(struct udevice *dev)
+{
+	return TPS65217_PMIC_NUM_OF_REGS;
+}
+
+static int tps65217_write(struct udevice *dev, uint reg, const uint8_t *buff,
+			  int len)
+{
+	if (dm_i2c_write(dev, reg, buff, len)) {
+		pr_err("write error to device: %p register: %#x!\n", dev, reg);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int tps65217_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
+{
+	int ret;
+
+	ret = dm_i2c_read(dev, reg, buff, len);
+	if (ret) {
+		pr_err("read error %d from device: %p register: %#x!\n", ret,
+		       dev, reg);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int tps65217_bind(struct udevice *dev)
+{
+	ofnode regulators_node;
+	int children;
+
+	regulators_node = dev_read_subnode(dev, "regulators");
+	if (!ofnode_valid(regulators_node)) {
+		debug("%s: %s regulators subnode not found!\n", __func__,
+		      dev->name);
+		return -ENXIO;
+	}
+
+	debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
+
+	children = pmic_bind_children(dev, regulators_node, pmic_children_info);
+	if (!children)
+		debug("%s: %s - no child found\n", __func__, dev->name);
+
+	/* Always return success for this device */
+	return 0;
+}
+
+static struct dm_pmic_ops tps65217_ops = {
+	.reg_count = tps65217_reg_count,
+	.read = tps65217_read,
+	.write = tps65217_write,
+};
+
+static const struct udevice_id tps65217_ids[] = {
+	{ .compatible = "ti,tps65217" },
+	{ }
+};
+
+U_BOOT_DRIVER(pmic_tps65217) = {
+	.name = "tps65217 pmic",
+	.id = UCLASS_PMIC,
+	.of_match = tps65217_ids,
+	.bind = tps65217_bind,
+	.ops = &tps65217_ops,
+};
+#endif
-- 
2.7.4