power: add driver for the TPS65219 PMIC

The TPS65219 I2S PMIC features 3 Buck converters and 4 linear regulators,
2 GPOs, 1 GPIO, and 3 multi-function-pin.

This adds the PMIC driver, loading the regulator sub-nodes.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

drivers/power/pmic/Kconfig

@@ -367,6 +367,12 @@ config PMIC_TPS65941
 	The TPS65941 is a PMIC containing a bunch of SMPS & LDOs.
 	This driver binds the pmic children.
 
+config PMIC_TPS65219
+	bool "Enable driver for Texas Instruments TPS65219 PMIC"
+	depends on DM_PMIC
+	help
+	The TPS65219 is a PMIC containing a bunch of SMPS & LDOs.
+	This driver binds the pmic children.
 endif
 
 config PMIC_TPS65217

drivers/power/pmic/Makefile

@@ -43,3 +43,4 @@ obj-$(CONFIG_POWER_TPS65910) += pmic_tps65910.o
 obj-$(CONFIG_POWER_HI6553) += pmic_hi6553.o
 obj-$(CONFIG_POWER_MC34VR500) += pmic_mc34vr500.o
 obj-$(CONFIG_PMIC_TPS65941) += tps65941.o
+obj-$(CONFIG_PMIC_TPS65219) += tps65219.o

drivers/power/pmic/tps65219.c

@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2022 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <errno.h>
+#include <dm.h>
+#include <i2c.h>
+#include <log.h>
+#include <power/pmic.h>
+#include <power/regulator.h>
+#include <power/tps65219.h>
+#include <dm/device.h>
+
+static const struct pmic_child_info pmic_children_info[] = {
+	{ .prefix = "ldo", .driver = TPS65219_LDO_DRIVER },
+	{ .prefix = "buck", .driver = TPS65219_BUCK_DRIVER },
+	{ },
+};
+
+static int tps65219_reg_count(struct udevice *dev)
+{
+	return 0x41;
+}
+
+static int tps65219_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 tps65219_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
+{
+	if (dm_i2c_read(dev, reg, buff, len)) {
+		pr_err("read error from device: %p register: %#x!\n", dev, reg);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int tps65219_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);
+	}
+
+	debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
+
+	children = pmic_bind_children(dev, regulators_node, pmic_children_info);
+	if (!children)
+		printf("%s: %s - no child found\n", __func__, dev->name);
+
+	/* Probe all the child devices */
+	return dm_scan_fdt_dev(dev);
+}
+
+static struct dm_pmic_ops tps65219_ops = {
+	.reg_count = tps65219_reg_count,
+	.read = tps65219_read,
+	.write = tps65219_write,
+};
+
+static const struct udevice_id tps65219_ids[] = {
+	{ .compatible = "ti,tps65219" },
+	{ }
+};
+
+U_BOOT_DRIVER(pmic_tps65219) = {
+	.name = "tps65219_pmic",
+	.id = UCLASS_PMIC,
+	.of_match = tps65219_ids,
+	.bind = tps65219_bind,
+	.ops = &tps65219_ops,
+};

include/power/tps65219.h

@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2022 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ */
+
+#ifndef TPS65219_H
+#define TPS65219_H
+
+/* I2C device address for pmic tps65219 */
+#define TPS65219_I2C_ADDR		0x30
+#define TPS65219_LDO_NUM		4
+#define TPS65219_BUCK_NUM		3
+
+/* Drivers name */
+#define TPS65219_LDO_DRIVER		"tps65219_ldo"
+#define TPS65219_BUCK_DRIVER		"tps65219_buck"
+
+#define TPS65219_VOLT_MASK		0x3F
+#define TPS65219_BUCK_VOLT_MAX		3400000
+
+#define TPS65219_ENABLE_CTRL_REG	0x2
+
+#define TPS65219_BUCK1_VOUT_REG		0xa
+#define TPS65219_BUCK2_VOUT_REG		0x9
+#define TPS65219_BUCK3_VOUT_REG		0x8
+
+#define TPS65219_LDO1_VOUT_REG		0x7
+#define TPS65219_LDO2_VOUT_REG		0x6
+
+#define TPS65219_LDO12_BYP_CONFIG	6
+
+#define TPS65219_LDO3_VOUT_REG		0x5
+#define TPS65219_LDO4_VOUT_REG		0x4
+
+#define TPS65219_LDO12_VOLT_BYP_MIN	1500000
+#define TPS65219_LDO12_VOLT_MIN		 600000
+#define TPS65219_LDO12_VOLT_MAX		3400000
+#define TPS65219_LDO12_VOLT_REG_MIN	0
+#define TPS65219_LDO12_VOLT_REG_MAX	0x56
+#define TPS65219_LDO34_VOLT_MIN		1200000
+#define TPS65219_LDO34_VOLT_MAX		3300000
+#define TPS65219_LDO34_VOLT_REG_MIN	0x12
+#define TPS65219_LDO34_VOLT_REG_MAX	0x54
+
+#endif /* TPS65219_H */