power: pmic: tps65941: Add support for tps65941 family of PMICs

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

Signed-off-by: Keerthy <j-keerthy@ti.com>

diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig
index 4718dc7..b4bf018 100644 (file)
--- a/drivers/power/pmic/Kconfig
+++ b/drivers/power/pmic/Kconfig
@@ -275,3 +275,10 @@ config SPL_PMIC_LP87565
        help
        The LP87565 is a PMIC containing a bunch of SMPS.
        This driver binds the pmic children in SPL.
+
+config PMIC_TPS65941
+       bool "Enable driver for Texas Instruments TPS65941 PMIC"
+       depends on DM_PMIC
+       help
+       The TPS65941 is a PMIC containing a bunch of SMPS & LDOs.
+       This driver binds the pmic children.

diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
index 888dbb2..ec64327 100644 (file)
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -39,3 +39,4 @@ obj-$(CONFIG_POWER_TPS65218) += pmic_tps65218.o
 obj-$(CONFIG_POWER_TPS65910) += pmic_tps65910.o
 obj-$(CONFIG_POWER_HI6553) += pmic_hi6553.o
 obj-$(CONFIG_POWER_MC34VR500) += pmic_mc34vr500.o
+obj-$(CONFIG_PMIC_TPS65941) += tps65941.o

diff --git a/drivers/power/pmic/tps65941.c b/drivers/power/pmic/tps65941.c
new file mode 100644 (file)
index 0000000..e8f3c95
--- /dev/null
+++ b/drivers/power/pmic/tps65941.c
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2019 Texas Instruments Incorporated, <www.ti.com>
+ * Keerthy <j-keerthy@ti.com>
+ */
+
+#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/tps65941.h>
+#include <dm/device.h>
+
+static const struct pmic_child_info pmic_children_info[] = {
+       { .prefix = "ldo", .driver = TPS65941_LDO_DRIVER },
+       { .prefix = "buck", .driver = TPS65941_BUCK_DRIVER },
+       { },
+};
+
+static int tps65941_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!\n", dev, reg);
+               return -EIO;
+       }
+
+       return 0;
+}
+
+static int tps65941_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!\n", dev, reg);
+               return -EIO;
+       }
+
+       return 0;
+}
+
+static int tps65941_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!\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)
+               printf("%s: %s - no child found\n", __func__, dev->name);
+
+       /* Always return success for this device */
+       return 0;
+}
+
+static struct dm_pmic_ops tps65941_ops = {
+       .read = tps65941_read,
+       .write = tps65941_write,
+};
+
+static const struct udevice_id tps65941_ids[] = {
+       { .compatible = "ti,tps659411", .data = TPS659411 },
+       { .compatible = "ti,tps659413", .data = TPS659413 },
+       { }
+};
+
+U_BOOT_DRIVER(pmic_tps65941) = {
+       .name = "tps65941_pmic",
+       .id = UCLASS_PMIC,
+       .of_match = tps65941_ids,
+       .bind = tps65941_bind,
+       .ops = &tps65941_ops,
+};

diff --git a/include/power/tps65941.h b/include/power/tps65941.h
new file mode 100644 (file)
index 0000000..2d48b31
--- /dev/null
+++ b/include/power/tps65941.h
@@ -0,0 +1,26 @@
+#define        TPS659411               0x0
+#define TPS659412              0x1
+#define TPS659413              0x2
+#define TPS659414              0x3
+
+/* I2C device address for pmic tps65941 */
+#define TPS65941_I2C_ADDR      (0x12 >> 1)
+#define TPS65941_LDO_NUM               4
+#define TPS65941_BUCK_NUM              5
+
+/* Drivers name */
+#define TPS65941_LDO_DRIVER            "tps65941_ldo"
+#define TPS65941_BUCK_DRIVER           "tps65941_buck"
+
+#define TPS65941_BUCK_VOLT_MASK                0xFF
+#define TPS65941_BUCK_VOLT_MAX_HEX     0xFF
+#define TPS65941_BUCK_VOLT_MAX         3340000
+#define TPS65941_BUCK_MODE_MASK                0x1
+
+#define TPS65941_LDO_VOLT_MASK         0x3E
+#define TPS65941_LDO_VOLT_MAX_HEX      0x3A
+#define TPS65941_LDO_VOLT_MIN_HEX      0x4
+#define TPS65941_LDO_VOLT_MAX          3300000
+#define TPS65941_LDO_MODE_MASK         0x1
+#define TPS65941_LDO_BYPASS_EN         0x80
+#define TP65941_BUCK_CONF_SLEW_MASK    0x7