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 13d293a93d30d2d439f72ddbd4f931df10396f85..1a85566ff2373f193999ff5e31050b52de4f5061 100644 (file)
--- a/drivers/power/pmic/Kconfig
+++ b/drivers/power/pmic/Kconfig
@@ -143,3 +143,10 @@ config PMIC_TPS65090
        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 37d9eb55991f4348a7f8cdde2e90a96a6c8fd66c..6710673a5fdba63dcf47f88012521fbb756e9961 100644 (file)
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_PMIC_RK808) += rk808.o
 obj-$(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 (file)
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 (file)
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