The existing TPS65090 driver does not support driver model. Add a new one that does. This can be used as a base for a regulator driver also. It uses the standard device tree binding.
Signed-off-by: Simon Glass sjg@chromium.org ---
drivers/power/pmic/Kconfig | 9 +++++ drivers/power/pmic/Makefile | 1 + drivers/power/pmic/tps65090.c | 94 +++++++++++++++++++++++++++++++++++++++++++ include/power/tps65090.h | 56 ++++++++++++++++++++++++++ 4 files changed, 160 insertions(+) create mode 100644 drivers/power/pmic/tps65090.c create mode 100644 include/power/tps65090.h
diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig index 164f421..fd8af81 100644 --- a/drivers/power/pmic/Kconfig +++ b/drivers/power/pmic/Kconfig @@ -41,3 +41,12 @@ config DM_PMIC_SANDBOX - set by i2c emul driver's probe() (defaults in header)
Driver binding info: doc/device-tree-bindings/pmic/sandbox.txt + +config PMIC_TPS65090 + bool "Enable driver for Texas Instruments TPS65090 PMIC" + depends on DM_PMIC + ---help--- + The TPS65090 is a PMIC containing several LDOs, DC to DC convertors, + FETs and a battery charger. This driver provides register access + only, and you can enable the regulator/charger drivers separately if + required. diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile index ae86f04..2316e3b 100644 --- a/drivers/power/pmic/Makefile +++ b/drivers/power/pmic/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_DM_PMIC) += pmic-uclass.o obj-$(CONFIG_DM_PMIC_MAX77686) += max77686.o obj-$(CONFIG_DM_PMIC_SANDBOX) += sandbox.o i2c_pmic_emul.o +obj-$(CONFIG_PMIC_TPS65090) += tps65090.o obj-$(CONFIG_POWER_LTC3676) += pmic_ltc3676.o obj-$(CONFIG_POWER_MAX8998) += pmic_max8998.o obj-$(CONFIG_POWER_MAX8997) += pmic_max8997.o diff --git a/drivers/power/pmic/tps65090.c b/drivers/power/pmic/tps65090.c new file mode 100644 index 0000000..4797f32 --- /dev/null +++ b/drivers/power/pmic/tps65090.c @@ -0,0 +1,94 @@ +/* + * Copyright (c) 2015 Google, Inc + * Written by Simon Glass sjg@chromium.org + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <fdtdec.h> +#include <i2c.h> +#include <power/pmic.h> +#include <power/tps65090.h> + +DECLARE_GLOBAL_DATA_PTR; + +static const struct pmic_child_info pmic_children_info[] = { + { .prefix = "fet", .driver = TPS65090_FET_DRIVER }, + { }, +}; + +static int tps65090_reg_count(struct udevice *dev) +{ + return TPS65090_NUM_REGS; +} + +static int tps65090_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 tps65090_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 %d from device: %p register: %#x!", ret, dev, + reg); + return -EIO; + } + + return 0; +} + +static int tps65090_bind(struct udevice *dev) +{ + int regulators_node; + const void *blob = gd->fdt_blob; + int children; + + regulators_node = fdt_subnode_offset(blob, dev->of_offset, + "regulators"); + if (regulators_node <= 0) { + 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 struct dm_pmic_ops tps65090_ops = { + .reg_count = tps65090_reg_count, + .read = tps65090_read, + .write = tps65090_write, +}; + +static const struct udevice_id tps65090_ids[] = { + { .compatible = "ti,tps65090" }, + { } +}; + +U_BOOT_DRIVER(pmic_tps65090) = { + .name = "tps65090 pmic", + .id = UCLASS_PMIC, + .of_match = tps65090_ids, + .bind = tps65090_bind, + .ops = &tps65090_ops, +}; diff --git a/include/power/tps65090.h b/include/power/tps65090.h new file mode 100644 index 0000000..3a0690b --- /dev/null +++ b/include/power/tps65090.h @@ -0,0 +1,56 @@ +/* + * Copyright (c) 2015 Google, Inc + * Written by Simon Glass sjg@chromium.org + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __TPS65090_PMIC_H_ +#define __TPS65090_PMIC_H_ + +/* I2C device address for TPS65090 PMU */ +#define TPS65090_I2C_ADDR 0x48 + +/* TPS65090 register addresses */ +enum { + REG_IRQ1 = 0, + REG_CG_CTRL0 = 4, + REG_CG_STATUS1 = 0xa, + REG_FET_BASE = 0xe, /* Not a real register, FETs count from here */ + REG_FET1_CTRL, + REG_FET2_CTRL, + REG_FET3_CTRL, + REG_FET4_CTRL, + REG_FET5_CTRL, + REG_FET6_CTRL, + REG_FET7_CTRL, + TPS65090_NUM_REGS, +}; + +enum { + IRQ1_VBATG = 1 << 3, + CG_CTRL0_ENC_MASK = 0x01, + + MAX_FET_NUM = 7, + MAX_CTRL_READ_TRIES = 5, + + /* TPS65090 FET_CTRL register values */ + FET_CTRL_TOFET = 1 << 7, /* Timeout, startup, overload */ + FET_CTRL_PGFET = 1 << 4, /* Power good for FET status */ + FET_CTRL_WAIT = 3 << 2, /* Overcurrent timeout max */ + FET_CTRL_ADENFET = 1 << 1, /* Enable output auto discharge */ + FET_CTRL_ENFET = 1 << 0, /* Enable FET */ +}; + +enum { + /* Status register fields */ + TPS65090_ST1_OTC = 1 << 0, + TPS65090_ST1_OCC = 1 << 1, + TPS65090_ST1_STATE_SHIFT = 4, + TPS65090_ST1_STATE_MASK = 0xf << TPS65090_ST1_STATE_SHIFT, +}; + +/* Drivers name */ +#define TPS65090_FET_DRIVER "tps65090_fet" + +#endif /* __TPS65090_PMIC_H_ */