+++ /dev/null
-/*
- * Copyright (c) 2013 The Chromium OS Authors.
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#include <common.h>
-#include <cros_ec.h>
-#include <errno.h>
-#include <power/tps65090_pmic.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-#define TPS65090_ADDR 0x48
-
-static struct tps65090 {
- struct cros_ec_dev *dev; /* The CROS_EC device */
-} config;
-
-/* 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 */
-};
-
-/**
- * tps65090_read - read a byte from tps6090
- *
- * @param reg The register address to read from.
- * @param val We'll return value value read here.
- * @return 0 if ok; error if EC returns failure.
- */
-static int tps65090_read(u32 reg, u8 *val)
-{
- return cros_ec_i2c_xfer_old(config.dev, TPS65090_ADDR, reg, 1,
- val, 1, true);
-}
-
-/**
- * tps65090_write - write a byte to tps6090
- *
- * @param reg The register address to write to.
- * @param val The value to write.
- * @return 0 if ok; error if EC returns failure.
- */
-static int tps65090_write(u32 reg, u8 val)
-{
- return cros_ec_i2c_xfer_old(config.dev, TPS65090_ADDR, reg, 1,
- &val, 1, false);
-}
-
-/**
- * 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 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(int fet_id, bool set)
-{
- int retry;
- u8 reg, value;
-
- value = FET_CTRL_ADENFET | FET_CTRL_WAIT;
- if (set)
- value |= FET_CTRL_ENFET;
-
- if (tps65090_write(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 (tps65090_read(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)
-{
- ulong start;
- int loops;
- int ret;
-
- ret = tps65090_check_fet(fet_id);
- if (ret)
- return ret;
-
- start = get_timer(0);
- for (loops = 0;; loops++) {
- ret = tps65090_fet_set(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(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)
-{
- int ret;
-
- ret = tps65090_check_fet(fet_id);
- if (ret)
- return ret;
-
- ret = tps65090_fet_set(fet_id, false);
-
- return ret;
-}
-
-int tps65090_fet_is_enabled(unsigned int fet_id)
-{
- u8 reg = 0;
- int ret;
-
- ret = tps65090_check_fet(fet_id);
- if (ret)
- return ret;
- ret = tps65090_read(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_init(void)
-{
- puts("TPS65090 PMIC EC init\n");
-
- config.dev = board_get_cros_ec_dev();
- if (!config.dev) {
- debug("%s: no cros_ec device: cannot init tps65090\n",
- __func__);
- return -ENODEV;
- }
-
- return 0;
-}
projects / karo-tx-uboot.git / blobdiff