power: pmic: lp87565: Add the basic pmic support

Add support to bind the regulators/child nodes with the pmic.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>

drivers/power/pmic/Kconfig

@@ -188,6 +188,13 @@ config PMIC_LP873X
 	The LP873X is a PMIC containing couple of LDOs and couple of SMPS.
 	This driver binds the pmic children.
 
+config PMIC_LP87565
+	bool "Enable driver for Texas Instruments LP87565 PMIC"
+	depends on DM_PMIC
+	---help---
+	The LP87565 is a PMIC containing a bunch of SMPS.
+	This driver binds the pmic children.
+
 config POWER_MC34VR500
 	bool "Enable driver for Freescale MC34VR500 PMIC"
 	---help---

drivers/power/pmic/Makefile

@@ -21,6 +21,7 @@ obj-$(CONFIG_PMIC_TPS65090) += tps65090.o
 obj-$(CONFIG_PMIC_S5M8767) += s5m8767.o
 obj-$(CONFIG_$(SPL_)PMIC_PALMAS) += palmas.o
 obj-$(CONFIG_$(SPL_)PMIC_LP873X) += lp873x.o
+obj-$(CONFIG_$(SPL_)PMIC_LP87565) += lp87565.o
 
 obj-$(CONFIG_POWER_LTC3676) += pmic_ltc3676.o
 obj-$(CONFIG_POWER_MAX77696) += pmic_max77696.o

drivers/power/pmic/lp87565.c

@@ -0,0 +1,87 @@
+/*
+ * (C) Copyright 2017 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/lp87565.h>
+#include <dm/device.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct pmic_child_info pmic_children_info[] = {
+	{ .prefix = "buck", .driver = LP87565_BUCK_DRIVER },
+	{ },
+};
+
+static int lp87565_write(struct udevice *dev, uint reg, const uint8_t *buff,
+			  int len)
+{
+	int ret;
+
+	ret = dm_i2c_write(dev, reg, buff, len);
+	if (ret)
+		error("write error to device: %p register: %#x!", dev, reg);
+
+	return ret;
+}
+
+static int lp87565_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
+{
+	int ret;
+
+	ret = dm_i2c_read(dev, reg, buff, len);
+	if (ret)
+		error("read error from device: %p register: %#x!", dev, reg);
+
+	return ret;
+}
+
+static int lp87565_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)
+		printf("%s: %s - no child found\n", __func__, dev->name);
+
+	/* Always return success for this device */
+	return 0;
+}
+
+static struct dm_pmic_ops lp87565_ops = {
+	.read = lp87565_read,
+	.write = lp87565_write,
+};
+
+static const struct udevice_id lp87565_ids[] = {
+	{ .compatible = "ti,lp87565", .data = LP87565 },
+	{ .compatible = "ti,lp87565-q1", .data = LP87565_Q1 },
+	{ }
+};
+
+U_BOOT_DRIVER(pmic_lp87565) = {
+	.name = "lp87565_pmic",
+	.id = UCLASS_PMIC,
+	.of_match = lp87565_ids,
+	.bind = lp87565_bind,
+	.ops = &lp87565_ops,
+};

include/power/lp87565.h

@@ -0,0 +1,12 @@
+#define LP87565	0x0
+#define LP87565_Q1	0x1
+
+#define LP87565_BUCK_NUM		6
+
+/* Drivers name */
+#define LP87565_BUCK_DRIVER	"lp87565_buck"
+
+#define LP87565_BUCK_VOLT_MASK		0xFF
+#define LP87565_BUCK_VOLT_MAX_HEX	0xFF
+#define LP87565_BUCK_VOLT_MAX		3360000
+#define LP87565_BUCK_MODE_MASK		0x80