[PATCH 2/4] power: pmic: add driver for Monolithic Power mp5416
Tim Harvey
tharvey at gateworks.com
Wed Jan 13 18:00:23 CET 2021
This adds basic register access and child regulator binding
for the Monolithic MP5416 Power Management IC which integrates
four DC/DC switching converters and five LDO regulators.
Signed-off-by: Tim Harvey <tharvey at gateworks.com>
---
drivers/power/pmic/Kconfig | 15 +++++++
drivers/power/pmic/Makefile | 1 +
drivers/power/pmic/mp5416.c | 98 +++++++++++++++++++++++++++++++++++++++++++++
include/power/mp5416.h | 41 +++++++++++++++++++
4 files changed, 155 insertions(+)
create mode 100644 drivers/power/pmic/mp5416.c
create mode 100644 include/power/mp5416.h
diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig
index 7d51510..583fd3d 100644
--- a/drivers/power/pmic/Kconfig
+++ b/drivers/power/pmic/Kconfig
@@ -91,6 +91,21 @@ config DM_PMIC_FAN53555
The driver implements read/write operations for use with the FAN53555
regulator driver and binds the regulator driver to its node.
+config DM_PMIC_MP5416
+ bool "Enable Driver Model for PMIC MP5416"
+ depends on DM_PMIC
+ help
+ This config enables implementation of driver-model pmic uclass features
+ for PMIC MP5416. The driver implements read/write operations.
+
+config SPL_DM_PMIC_MP5416
+ bool "Enable Driver Model for PMIC MP5416 in SPL stage"
+ depends on DM_PMIC
+ help
+ This config enables implementation of driver-model pmic uclass
+ features for PMIC MP5416. The driver implements read/write
+ operations.
+
config DM_PMIC_PCA9450
bool "Enable Driver Model for PMIC PCA9450"
depends on DM_PMIC
diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
index 9cd6c37..2b2a6dd 100644
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_DM_PMIC_MAX77686) += max77686.o
obj-$(CONFIG_DM_PMIC_MAX8998) += max8998.o
obj-$(CONFIG_DM_PMIC_MC34708) += mc34708.o
obj-$(CONFIG_$(SPL_)DM_PMIC_BD71837) += bd71837.o
+obj-$(CONFIG_$(SPL_)DM_PMIC_MP5416) += mp5416.o
obj-$(CONFIG_$(SPL_)DM_PMIC_PFUZE100) += pfuze100.o
obj-$(CONFIG_$(SPL_)DM_PMIC_PCA9450) += pca9450.o
obj-$(CONFIG_PMIC_S2MPS11) += s2mps11.o
diff --git a/drivers/power/pmic/mp5416.c b/drivers/power/pmic/mp5416.c
new file mode 100644
index 0000000..458c4df
--- /dev/null
+++ b/drivers/power/pmic/mp5416.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2020 Gateworks Corporation
+ */
+#include <common.h>
+#include <errno.h>
+#include <dm.h>
+#include <i2c.h>
+#include <log.h>
+#include <power/pmic.h>
+#include <power/regulator.h>
+#include <power/mp5416.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct pmic_child_info pmic_children_info[] = {
+ /* buck */
+ { .prefix = "b", .driver = MP6416_REGULATOR_DRIVER },
+ /* ldo */
+ { .prefix = "l", .driver = MP6416_REGULATOR_DRIVER },
+ { },
+};
+
+static int mp5416_reg_count(struct udevice *dev)
+{
+ return MP5416_NUM_OF_REGS - 1;
+}
+
+static int mp5416_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!", dev, reg);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int mp5416_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!", dev, reg);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int mp5416_bind(struct udevice *dev)
+{
+ int children;
+ ofnode regulators_node;
+
+ debug("%s %s\n", __func__, dev->name);
+ 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 int mp5416_probe(struct udevice *dev)
+{
+ debug("%s %s\n", __func__, dev->name);
+
+ return 0;
+}
+
+static struct dm_pmic_ops mp5416_ops = {
+ .reg_count = mp5416_reg_count,
+ .read = mp5416_read,
+ .write = mp5416_write,
+};
+
+static const struct udevice_id mp5416_ids[] = {
+ { .compatible = "mps,mp5416", },
+ { }
+};
+
+U_BOOT_DRIVER(pmic_mp5416) = {
+ .name = "mp5416 pmic",
+ .id = UCLASS_PMIC,
+ .of_match = mp5416_ids,
+ .bind = mp5416_bind,
+ .probe = mp5416_probe,
+ .ops = &mp5416_ops,
+};
diff --git a/include/power/mp5416.h b/include/power/mp5416.h
new file mode 100644
index 0000000..dc096fe
--- /dev/null
+++ b/include/power/mp5416.h
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (C) 2020 Gateworks Corporation */
+
+#ifndef MP5416_H_
+#define MP5416_H_
+
+#define MP6416_REGULATOR_DRIVER "mp5416_regulator"
+
+enum {
+ MP5416_CTL0 = 0x00,
+ MP5416_CTL1 = 0x01,
+ MP5416_CTL2 = 0x02,
+ MP5416_ILIMIT = 0x03,
+ MP5416_VSET_SW1 = 0x04,
+ MP5416_VSET_SW2 = 0x05,
+ MP5416_VSET_SW3 = 0x06,
+ MP5416_VSET_SW4 = 0x07,
+ MP5416_VSET_LDO2 = 0x08,
+ MP5416_VSET_LDO3 = 0x09,
+ MP5416_VSET_LDO4 = 0x0a,
+ MP5416_VSET_LDO5 = 0x0b,
+ MP5416_STATUS1 = 0x0d,
+ MP5416_STATUS2 = 0x0e,
+ MP5416_STATUS3 = 0x0f,
+ MP5416_ID2 = 0x11,
+ MP5416_NUM_OF_REGS = 0x12,
+};
+
+#define MP5416_VSET_EN BIT(7)
+#define MP5416_VSET_SW1_GVAL(x) ((((x) & 0x7f) * 12500) + 600000)
+#define MP5416_VSET_SW2_GVAL(x) ((((x) & 0x7f) * 25000) + 800000)
+#define MP5416_VSET_SW3_GVAL(x) ((((x) & 0x7f) * 12500) + 600000)
+#define MP5416_VSET_SW4_GVAL(x) ((((x) & 0x7f) * 25000) + 800000)
+#define MP5416_VSET_LDO_GVAL(x) ((((x) & 0x7f) * 25000) + 800000)
+#define MP5416_VSET_LDO_SVAL(x) ((((x) & 0x7f) * 25000) + 800000)
+#define MP5416_VSET_SW1_SVAL(x) (((x) - 600000) / 12500)
+#define MP5416_VSET_SW2_SVAL(x) (((x) - 800000) / 25000)
+#define MP5416_VSET_SW3_SVAL(x) (((x) - 600000) / 12500)
+#define MP5416_VSET_SW4_SVAL(x) (((x) - 800000) / 25000)
+
+#endif
--
2.7.4
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