power: pmic: Palmas: Add the base pmic support
Add support to bind the regulators/child nodes with the pmic.
Also adds the pmic i2c based read/write funtions to access pmic
registers.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig
index 13d293a..1a85566 100644
--- a/drivers/power/pmic/Kconfig
+++ b/drivers/power/pmic/Kconfig
@@ -143,3 +143,10 @@
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"
+ depends on DM_PMIC
+ ---help---
+ The PALMAS is a PMIC containing several LDOs, SMPS.
+ This driver binds the pmic children.
diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
index 37d9eb5..6710673 100644
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -16,6 +16,7 @@
obj-$(CONFIG_PMIC_RN5T567) += rn5t567.o
obj-$(CONFIG_PMIC_TPS65090) += tps65090.o
obj-$(CONFIG_PMIC_S5M8767) += s5m8767.o
+obj-$(CONFIG_$(SPL_)PMIC_PALMAS) += palmas.o
obj-$(CONFIG_POWER_LTC3676) += pmic_ltc3676.o
obj-$(CONFIG_POWER_MAX77696) += pmic_max77696.o
diff --git a/drivers/power/pmic/palmas.c b/drivers/power/pmic/palmas.c
new file mode 100644
index 0000000..6c79a93
--- /dev/null
+++ b/drivers/power/pmic/palmas.c
@@ -0,0 +1,104 @@
+/*
+ * (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
+ * Keerthy <j-keerthy@ti.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#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/palmas.h>
+#include <dm/device.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct pmic_child_info pmic_children_info[] = {
+ { .prefix = "ldo", .driver = PALMAS_LDO_DRIVER },
+ { .prefix = "smps", .driver = PALMAS_SMPS_DRIVER },
+ { },
+};
+
+static int palmas_write(struct udevice *dev, uint reg, const uint8_t *buff,
+ int len)
+{
+ if (dm_i2c_write(dev, reg, buff, len)) {
+ error("write error to device: %p register: %#x!", dev, reg);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int palmas_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
+{
+ if (dm_i2c_read(dev, reg, buff, len)) {
+ error("read error from device: %p register: %#x!", dev, reg);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int palmas_bind(struct udevice *dev)
+{
+ int pmic_node = -1, regulators_node;
+ const void *blob = gd->fdt_blob;
+ int children;
+ int node = dev->of_offset;
+ int subnode, len;
+
+ fdt_for_each_subnode(blob, subnode, node) {
+ const char *name;
+ char *temp;
+
+ name = fdt_get_name(blob, subnode, &len);
+ temp = strstr(name, "pmic");
+ if (temp) {
+ pmic_node = subnode;
+ break;
+ }
+ }
+
+ if (pmic_node <= 0) {
+ debug("%s: %s pmic subnode not found!", __func__, dev->name);
+ return -ENXIO;
+ }
+
+ regulators_node = fdt_subnode_offset(blob, pmic_node, "regulators");
+
+ if (regulators_node <= 0) {
+ debug("%s: %s reg subnode not found!", __func__, dev->name);
+ return -ENXIO;
+ }
+
+ 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 palmas_ops = {
+ .read = palmas_read,
+ .write = palmas_write,
+};
+
+static const struct udevice_id palmas_ids[] = {
+ { .compatible = "ti,tps659038", .data = TPS659038 },
+ { .compatible = "ti,tps65917" , .data = TPS65917 },
+ { }
+};
+
+U_BOOT_DRIVER(pmic_palmas) = {
+ .name = "palmas_pmic",
+ .id = UCLASS_PMIC,
+ .of_match = palmas_ids,
+ .bind = palmas_bind,
+ .ops = &palmas_ops,
+};
diff --git a/include/power/palmas.h b/include/power/palmas.h
new file mode 100644
index 0000000..bad5a35
--- /dev/null
+++ b/include/power/palmas.h
@@ -0,0 +1,25 @@
+#define PALMAS 0x0
+#define TPS659038 0x1
+#define TPS65917 0x2
+
+/* I2C device address for pmic palmas */
+#define PALMAS_I2C_ADDR (0x12 >> 1)
+#define PALMAS_LDO_NUM 11
+#define PALMAS_SMPS_NUM 8
+
+/* Drivers name */
+#define PALMAS_LDO_DRIVER "palmas_ldo"
+#define PALMAS_SMPS_DRIVER "palmas_smps"
+
+#define PALMAS_SMPS_VOLT_MASK 0x7F
+#define PALMAS_SMPS_RANGE_MASK 0x80
+#define PALMAS_SMPS_VOLT_MAX_HEX 0x7F
+#define PALMAS_SMPS_VOLT_MAX 3300000
+#define PALMAS_SMPS_MODE_MASK 0x3
+#define PALMAS_SMPS_STATUS_MASK 0x30
+
+#define PALMAS_LDO_VOLT_MASK 0x3F
+#define PALMAS_LDO_VOLT_MAX_HEX 0x3F
+#define PALMAS_LDO_VOLT_MAX 3300000
+#define PALMAS_LDO_MODE_MASK 0x1
+#define PALMAS_LDO_STATUS_MASK 0x10