[PATCH 2/3] power: pmic: Provide DM_PMIC support for tps65217 driver

Lukasz Majewski
2022-02-22T08:04:35Z

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.

Moreover, new CONFIG_PMIC_TPS65217 has been introduced in Kconfig
to be used with boards, which both support DM_PMIC and DM_I2C.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
---

drivers/power/pmic/Kconfig | 8 +++
drivers/power/pmic/pmic_tps65217.c | 82 ++++++++++++++++++++++++++++++
2 files changed, 90 insertions(+)

diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig
index ce0adb18a4..c7739228da 100644
--- a/drivers/power/pmic/Kconfig
+++ b/drivers/power/pmic/Kconfig
@@ -306,6 +306,14 @@ config PMIC_TPS65090
only, and you can enable the regulator/charger drivers separately if
required.

+config PMIC_TPS65217
+ bool "Enable driver for Texas Instruments TPS65217 PMIC"
+ ---help---
+ The TPS65217 is a PMIC containing several LDOs, DC to DC convertors,
+ FETs and a battery charger. This driver provides register access
+ only, and you can enable the regulator/charger drivers separately if
+ required.
+
config PMIC_PALMAS
bool "Enable driver for Texas Instruments PALMAS PMIC"
---help---
diff --git a/drivers/power/pmic/pmic_tps65217.c b/drivers/power/pmic/pmic_tps65217.c
index c7f532df4d..ccbf223593 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
--
2.20.1