[PATCH v2 1/2] driver: power: add support for TPS65224

Bhargav Raviprakash bhargav.r at ltts.com
Mon Nov 6 15:07:11 CET 2023


Added support for PMIC TPS65224. Includes driver for pmic,
and disabling Watchdog.

Signed-off-by: Bhargav Raviprakash <bhargav.r at ltts.com>
---
 drivers/power/pmic/Kconfig    |   6 ++
 drivers/power/pmic/Makefile   |   1 +
 drivers/power/pmic/tps65224.c | 141 ++++++++++++++++++++++++++++++++++
 include/power/tps65224.h      |  57 ++++++++++++++
 4 files changed, 205 insertions(+)
 create mode 100644 drivers/power/pmic/tps65224.c
 create mode 100644 include/power/tps65224.h

diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig
index 4a6f0ce093..b06bd31823 100644
--- a/drivers/power/pmic/Kconfig
+++ b/drivers/power/pmic/Kconfig
@@ -378,6 +378,12 @@ config PMIC_TPS65941
 	The TPS65941 is a PMIC containing a bunch of SMPS & LDOs.
 	This driver binds the pmic children.
 
+config PMIC_TPS65224
+	bool "Enable driver for Texas Instruments TPS65224 PMIC"
+	help
+	The TPS65224 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
diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
index 0b3b3d62d0..cec16e57d3 100644
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -33,6 +33,7 @@ obj-$(CONFIG_PMIC_STPMIC1) += stpmic1.o
 obj-$(CONFIG_PMIC_TPS65217) += pmic_tps65217.o
 obj-$(CONFIG_PMIC_TPS65219) += tps65219.o
 obj-$(CONFIG_PMIC_TPS65941) += tps65941.o
+obj-$(CONFIG_PMIC_TPS65224) += tps65224.o
 obj-$(CONFIG_POWER_TPS65218) += pmic_tps65218.o
 
 ifeq ($(CONFIG_$(SPL_)POWER_LEGACY),y)
diff --git a/drivers/power/pmic/tps65224.c b/drivers/power/pmic/tps65224.c
new file mode 100644
index 0000000000..33395f6edf
--- /dev/null
+++ b/drivers/power/pmic/tps65224.c
@@ -0,0 +1,141 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2023 Texas Instruments Incorporated, <www.ti.com>
+ */
+#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/tps65224.h>
+#include <dm/device.h>
+
+static const struct pmic_child_info pmic_children_info[] = {
+	{ .prefix = "ldo", .driver = TPS65224_LDO_DRIVER },
+	{ .prefix = "buck", .driver = TPS65224_BUCK_DRIVER },
+	{ },
+};
+
+static int tps65224_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 tps65224_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 tps65224_bind(struct udevice *dev)
+{
+	ofnode regulators_node;
+	int children;
+
+	if (dev->driver_data == TPS65224_WD)
+		return 0;
+
+	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)
+		printf("%s: %s - no child found\n", __func__, dev->name);
+
+	/* Probe all the child devices */
+	return dm_scan_fdt_dev(dev);
+}
+
+static int stop_watchdog(struct udevice *wd_i2c_dev)
+{
+	int ret;
+
+	/* Maintain WD long window */
+	ret = dm_i2c_reg_read(wd_i2c_dev, TPS65224_WD_MODE_REG);
+	if (ret < 0) {
+		debug("failed to read i2c reg (%d)\n", ret);
+		return ret;
+	}
+
+	ret &= ~TPS65224_WD_PWRHOLD_MASK;
+	ret |= TPS65224_WD_PWRHOLD_MASK;
+	ret = dm_i2c_reg_write(wd_i2c_dev, TPS65224_WD_MODE_REG, ret);
+	if (ret) {
+		debug("%s: %s write WD_PWRHOLD fail!\n", __func__, wd_i2c_dev->name);
+		return ret;
+	}
+
+	ret = dm_i2c_reg_read(wd_i2c_dev, TPS65224_WD_MODE_REG);
+	if (ret < 0) {
+		debug("failed to read back i2c reg (%d)\n", ret);
+		return ret;
+	}
+
+	/* Disable WD */
+	ret = dm_i2c_reg_read(wd_i2c_dev, TPS65224_WD_THR_CFG);
+	if (ret < 0) {
+		debug("failed to read i2c reg (%d)\n", ret);
+		return ret;
+	}
+
+	ret &= ~TPS65224_WD_EN_MASK;
+	ret = dm_i2c_reg_write(wd_i2c_dev, TPS65224_WD_THR_CFG, ret);
+	if (ret) {
+		debug("%s: %s write WD_EN fail!\n", __func__, wd_i2c_dev->name);
+		return ret;
+	}
+
+	ret = dm_i2c_reg_read(wd_i2c_dev, TPS65224_WD_THR_CFG);
+	if (ret < 0) {
+		debug("failed to read back i2c reg (%d)\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int tps65224_probe(struct udevice *dev)
+{
+	if (dev->driver_data == TPS65224_WD)
+		return stop_watchdog(dev);
+
+	return 0;
+}
+
+static struct dm_pmic_ops tps65224_ops = {
+	.read = tps65224_read,
+	.write = tps65224_write,
+};
+
+static const struct udevice_id tps65224_ids[] = {
+	{ .compatible = "ti,tps65224", .data = TPS65224 },
+	{ .compatible = "ti,tps65224_watchdog",  .data =  TPS65224_WD },
+	{ }
+};
+
+U_BOOT_DRIVER(pmic_tps65224) = {
+	.name = "tps65224_pmic",
+	.id = UCLASS_PMIC,
+	.of_match = tps65224_ids,
+	.bind = tps65224_bind,
+	.probe = tps65224_probe,
+	.ops = &tps65224_ops,
+};
diff --git a/include/power/tps65224.h b/include/power/tps65224.h
new file mode 100644
index 0000000000..24e91b6a67
--- /dev/null
+++ b/include/power/tps65224.h
@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2023 Texas Instruments Incorporated, <www.ti.com>
+ *
+ */
+#ifndef _POWER_TPS65224_H_
+#define _POWER_TPS65224_H_
+
+#define TPS65224                          0x0
+#define TPS65224_WD                       0x20
+
+/* I2C device address for pmic tps65224 */
+#define TPS65224_I2C_ADDR                (0x12 >> 1)
+#define TPS65224_LDO_NUM                  3
+#define TPS65224_BUCK_NUM                 4
+
+/* Drivers name */
+#define TPS65224_LDO_DRIVER              "tps65224_ldo"
+#define TPS65224_BUCK_DRIVER             "tps65224_buck"
+
+#define TPS65224_BUCK_VOLT_MASK           0xFF
+#define TPS65224_BUCK1_VOLT_MAX_HEX       0xFD
+#define TPS65224_BUCK234_VOLT_MAX_HEX     0x45
+#define TPS65224_BUCK_VOLT_MAX            3300000
+#define TPS65224_BUCK_MODE_MASK           0x1
+
+#define TPS65224_LDO_VOLT_MASK            (0x3F << 1)
+#define TPS65224_LDO_VOLT_MAX_HEX         0x3A
+#define TPS65224_LDO_VOLT_MIN_HEX         0x4
+#define TPS65224_LDO1_VOLT_MAX            3300000
+#define TPS65224_LDO23_VOLT_MAX           3400000
+#define TPS65224_LDO_MODE_MASK            0x1
+#define TPS65224_LDO_BYPASS_EN            0x80
+#define TP65224_BUCK_CONF_SLEW_MASK       0x3
+
+/* BYPASS is bit7 of VOUT TPS65224_LDO_BYP_MASK */
+#define TPS65224_LDO123_BYP_CONFIG        7
+
+#define TPS65224_LDO123_VOLT_BYP_MIN      2200000
+#define TPS65224_LDO123_VOLT_BYP_MAX      3600000
+#define TPS65224_LDO1_VOLT_MIN            1200000
+#define TPS65224_LDO23_VOLT_MIN           600000
+#define TPS65224_LDO4_VOLT_MIN            1200000
+#define TPS65224_LDO1_VSET_MIN            0x0C
+#define TPS65224_LDO23_VSET_MIN           0x00
+#define TPS65224_LDO123_VSET_MIN          0x0
+#define TPS65224_LDO1_VSET_MAX            0x36
+#define TPS65224_LDO23_VSET_MAX           0x38
+#define TPS65224_LDO123_STEP              50000
+#define TPS65224_LDO4_STEP                25000
+
+#define TPS65224_WD_MODE_REG              0x406
+#define TPS65224_WD_PWRHOLD_MASK          BIT(2)
+#define TPS65224_WD_THR_CFG               0x409
+#define TPS65224_WD_EN_MASK               BIT(6)
+
+#endif // _POWER_TPS65224_H_
-- 
2.25.1



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