power: pmic: add driver for Dialog DA9063 PMIC
This adds the basic register access operations and child regulator
binding (if a regulator driver exists).
Robert Beckett: simplify accesses by using bottom bit of address as
offset overflow. This avoids the need to track which page we are on.
Add an option CONFIG_SPL_DM_PMIC_DA9063.
Signed-off-by: Martin Fuzzey <martin.fuzzey@flowbird.group>
Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig
index df9372c..ef8bf49 100644
--- a/drivers/power/pmic/Kconfig
+++ b/drivers/power/pmic/Kconfig
@@ -40,6 +40,20 @@
functions. It uses an I2C interface and is designed for use with
tablets and smartphones.
+config DM_PMIC_DA9063
+ bool "Enable Driver Model for the Dialog DA9063 PMIC"
+ depends on DM_PMIC
+ help
+ This config enables implementation of driver-model pmic uclass features
+ for PMIC DA9063. The driver implements read/write operations.
+
+config SPL_DM_PMIC_DA9063
+ bool "Enable Driver Model for the Dialog DA9063 PMIC in SPL"
+ depends on DM_PMIC && SPL
+ help
+ This config enables implementation of driver-model pmic uclass features
+ for PMIC DA9063. The driver implements read/write operations.
+
config PMIC_AS3722
bool "Enable support for the Austria Micro Systems (AMS) AS7322 PMIC"
help
diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
index 7b6cb0e..9cd6c37 100644
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -5,6 +5,7 @@
obj-$(CONFIG_DM_PMIC) += pmic-uclass.o
obj-$(CONFIG_DM_PMIC_FAN53555) += fan53555.o
+obj-$(CONFIG_$(SPL_)DM_PMIC_DA9063) += da9063.o
obj-$(CONFIG_DM_PMIC_MAX77686) += max77686.o
obj-$(CONFIG_DM_PMIC_MAX8998) += max8998.o
obj-$(CONFIG_DM_PMIC_MC34708) += mc34708.o
diff --git a/drivers/power/pmic/da9063.c b/drivers/power/pmic/da9063.c
new file mode 100644
index 0000000..abda7a5
--- /dev/null
+++ b/drivers/power/pmic/da9063.c
@@ -0,0 +1,130 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Flowbird
+ * Martin Fuzzey <martin.fuzzey@flowbird.group>
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <errno.h>
+#include <dm.h>
+#include <i2c.h>
+#include <power/pmic.h>
+#include <power/regulator.h>
+#include <power/da9063_pmic.h>
+
+static const struct pmic_child_info pmic_children_info[] = {
+ { .prefix = "ldo", .driver = DA9063_LDO_DRIVER },
+ { .prefix = "b", .driver = DA9063_BUCK_DRIVER },
+ { },
+};
+
+/*
+ * The register map is non contiguous and attempts to read in the holes fail.
+ * But "pmic dump" tries to dump the full register map.
+ * So define the holes here so we can fix that.
+ */
+struct da9063_reg_hole {
+ u16 first;
+ u16 last;
+};
+
+static const struct da9063_reg_hole da9063_reg_holes[] = {
+ DA9063_REG_HOLE_1,
+ DA9063_REG_HOLE_2,
+ DA9063_REG_HOLE_3,
+ /* These aren't readable. I can't see why from the datasheet but
+ * attempts to read fail and the kernel marks them unreadable too,
+ */
+ {DA9063_REG_OTP_COUNT, DA9063_REG_OTP_DATA},
+};
+
+static int da9063_reg_count(struct udevice *dev)
+{
+ return DA9063_NUM_OF_REGS;
+}
+
+static bool da9063_reg_valid(uint reg)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(da9063_reg_holes); i++) {
+ const struct da9063_reg_hole *hole = &da9063_reg_holes[i];
+
+ if (reg >= hole->first && reg <= hole->last)
+ return false;
+ }
+
+ return true;
+}
+
+static int da9063_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 da9063_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
+{
+ if (!da9063_reg_valid(reg))
+ return -ENODATA;
+
+ 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 da9063_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!", __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 da9063_probe(struct udevice *dev)
+{
+ return i2c_set_chip_addr_offset_mask(dev, 0x1);
+}
+
+static struct dm_pmic_ops da9063_ops = {
+ .reg_count = da9063_reg_count,
+ .read = da9063_read,
+ .write = da9063_write,
+};
+
+static const struct udevice_id da9063_ids[] = {
+ { .compatible = "dlg,da9063" },
+ { }
+};
+
+U_BOOT_DRIVER(pmic_da9063) = {
+ .name = "da9063_pmic",
+ .id = UCLASS_PMIC,
+ .of_match = da9063_ids,
+ .bind = da9063_bind,
+ .probe = da9063_probe,
+ .ops = &da9063_ops,
+};