/* * Copyright (c) 2012 The Chromium OS Authors. * * SPDX-License-Identifier: GPL-2.0+ */ #include #include #include #include #include #include DECLARE_GLOBAL_DATA_PTR; #define TPS65090_NAME "TPS65090_PMIC" /* TPS65090 register addresses */ enum { REG_IRQ1 = 0, REG_CG_CTRL0 = 4, REG_CG_STATUS1 = 0xa, REG_FET1_CTRL = 0x0f, 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 */ }; /** * Checks for a valid FET number * * @param fet_id FET number to check * @return 0 if ok, -EINVAL if FET value is out of range */ static int tps65090_check_fet(unsigned int fet_id) { if (fet_id == 0 || fet_id > MAX_FET_NUM) { debug("parameter fet_id is out of range, %u not in 1 ~ %u\n", fet_id, MAX_FET_NUM); return -EINVAL; } return 0; } /** * Set the power state for a FET * * @param pmic pmic structure for the tps65090 * @param fet_id Fet number to set (1..MAX_FET_NUM) * @param set 1 to power on FET, 0 to power off * @return -EIO if we got a comms error, -EAGAIN if the FET failed to * change state. If all is ok, returns 0. */ static int tps65090_fet_set(struct pmic *pmic, int fet_id, bool set) { int retry; u32 reg, value; value = FET_CTRL_ADENFET | FET_CTRL_WAIT; if (set) value |= FET_CTRL_ENFET; if (pmic_reg_write(pmic, REG_FET1_CTRL + fet_id - 1, value)) return -EIO; /* Try reading until we get a result */ for (retry = 0; retry < MAX_CTRL_READ_TRIES; retry++) { if (pmic_reg_read(pmic, REG_FET1_CTRL + fet_id - 1, ®)) return -EIO; /* Check that the fet went into the expected state */ if (!!(reg & FET_CTRL_PGFET) == set) return 0; /* If we got a timeout, there is no point in waiting longer */ if (reg & FET_CTRL_TOFET) break; mdelay(1); } debug("FET %d: Power good should have set to %d but reg=%#02x\n", fet_id, set, reg); return -EAGAIN; } int tps65090_fet_enable(unsigned int fet_id) { struct pmic *pmic; ulong start; int loops; int ret; ret = tps65090_check_fet(fet_id); if (ret) return ret; pmic = pmic_get(TPS65090_NAME); if (!pmic) return -EACCES; start = get_timer(0); for (loops = 0;; loops++) { ret = tps65090_fet_set(pmic, fet_id, true); if (!ret) break; if (get_timer(start) > 100) break; /* Turn it off and try again until we time out */ tps65090_fet_set(pmic, fet_id, false); } if (ret) debug("%s: FET%d failed to power on: time=%lums, loops=%d\n", __func__, fet_id, get_timer(start), loops); else if (loops) debug("%s: FET%d powered on after %lums, loops=%d\n", __func__, fet_id, get_timer(start), loops); /* * Unfortunately, there are some conditions where the power * good bit will be 0, but the fet still comes up. One such * case occurs with the lcd backlight. We'll just return 0 here * and assume that the fet will eventually come up. */ if (ret == -EAGAIN) ret = 0; return ret; } int tps65090_fet_disable(unsigned int fet_id) { struct pmic *pmic; int ret; ret = tps65090_check_fet(fet_id); if (ret) return ret; pmic = pmic_get(TPS65090_NAME); if (!pmic) return -EACCES; ret = tps65090_fet_set(pmic, fet_id, false); return ret; } int tps65090_fet_is_enabled(unsigned int fet_id) { struct pmic *pmic; u32 reg; int ret; ret = tps65090_check_fet(fet_id); if (ret) return ret; pmic = pmic_get(TPS65090_NAME); if (!pmic) return -ENODEV; ret = pmic_reg_read(pmic, REG_FET1_CTRL + fet_id - 1, ®); if (ret) { debug("fail to read FET%u_CTRL register over I2C", fet_id); return -EIO; } return reg & FET_CTRL_ENFET; } int tps65090_get_charging(void) { struct pmic *pmic; u32 val; int ret; pmic = pmic_get(TPS65090_NAME); if (!pmic) return -EACCES; ret = pmic_reg_read(pmic, REG_CG_CTRL0, &val); if (ret) return ret; return !!(val & CG_CTRL0_ENC_MASK); } static int tps65090_charger_state(struct pmic *pmic, int state, int current) { u32 val; int ret; ret = pmic_reg_read(pmic, REG_CG_CTRL0, &val); if (!ret) { if (state == PMIC_CHARGER_ENABLE) val |= CG_CTRL0_ENC_MASK; else val &= ~CG_CTRL0_ENC_MASK; ret = pmic_reg_write(pmic, REG_CG_CTRL0, val); } if (ret) { debug("%s: Failed to read/write register\n", __func__); return ret; } return 0; } int tps65090_get_status(void) { struct pmic *pmic; u32 val; int ret; pmic = pmic_get(TPS65090_NAME); if (!pmic) return -EACCES; ret = pmic_reg_read(pmic, REG_CG_STATUS1, &val); if (ret) return ret; return val; } static int tps65090_charger_bat_present(struct pmic *pmic) { u32 val; int ret; ret = pmic_reg_read(pmic, REG_IRQ1, &val); if (ret) return ret; return !!(val & IRQ1_VBATG); } static struct power_chrg power_chrg_pmic_ops = { .chrg_bat_present = tps65090_charger_bat_present, .chrg_state = tps65090_charger_state, }; int tps65090_init(void) { struct pmic *p; int bus; int addr; const void *blob = gd->fdt_blob; int node, parent; node = fdtdec_next_compatible(blob, 0, COMPAT_TI_TPS65090); if (node < 0) { debug("PMIC: No node for PMIC Chip in device tree\n"); debug("node = %d\n", node); return -ENODEV; } parent = fdt_parent_offset(blob, node); if (parent < 0) { debug("%s: Cannot find node parent\n", __func__); return -EINVAL; } bus = i2c_get_bus_num_fdt(parent); if (bus < 0) { debug("%s: Cannot find I2C bus\n", __func__); return -ENOENT; } addr = fdtdec_get_int(blob, node, "reg", TPS65090_I2C_ADDR); p = pmic_alloc(); if (!p) { printf("%s: POWER allocation error!\n", __func__); return -ENOMEM; } p->name = TPS65090_NAME; p->bus = bus; p->interface = PMIC_I2C; p->number_of_regs = TPS65090_NUM_REGS; p->hw.i2c.addr = addr; p->hw.i2c.tx_num = 1; p->chrg = &power_chrg_pmic_ops; puts("TPS65090 PMIC init\n"); return 0; }