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![Jeroen Hofstee](/assets/img/avatar_default.png)
The function tps65090_init checks the i2c bus of p->bus. However the pointer p is not intialiased at this point. Check the local variable bus instead. cc: Tom Wai-Hong Tam <waihong@chromium.org> Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl> Acked-by: Simon Glass <sjg@chromium.org>
311 lines
6.2 KiB
C
311 lines
6.2 KiB
C
/*
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* Copyright (c) 2012 The Chromium OS Authors.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <errno.h>
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#include <fdtdec.h>
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#include <i2c.h>
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#include <power/pmic.h>
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#include <power/tps65090_pmic.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define TPS65090_NAME "TPS65090_PMIC"
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/* TPS65090 register addresses */
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enum {
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REG_IRQ1 = 0,
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REG_CG_CTRL0 = 4,
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REG_CG_STATUS1 = 0xa,
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REG_FET1_CTRL = 0x0f,
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REG_FET2_CTRL,
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REG_FET3_CTRL,
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REG_FET4_CTRL,
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REG_FET5_CTRL,
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REG_FET6_CTRL,
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REG_FET7_CTRL,
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TPS65090_NUM_REGS,
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};
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enum {
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IRQ1_VBATG = 1 << 3,
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CG_CTRL0_ENC_MASK = 0x01,
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MAX_FET_NUM = 7,
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MAX_CTRL_READ_TRIES = 5,
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/* TPS65090 FET_CTRL register values */
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FET_CTRL_TOFET = 1 << 7, /* Timeout, startup, overload */
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FET_CTRL_PGFET = 1 << 4, /* Power good for FET status */
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FET_CTRL_WAIT = 3 << 2, /* Overcurrent timeout max */
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FET_CTRL_ADENFET = 1 << 1, /* Enable output auto discharge */
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FET_CTRL_ENFET = 1 << 0, /* Enable FET */
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};
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/**
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* Checks for a valid FET number
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*
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* @param fet_id FET number to check
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* @return 0 if ok, -EINVAL if FET value is out of range
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*/
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static int tps65090_check_fet(unsigned int fet_id)
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{
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if (fet_id == 0 || fet_id > MAX_FET_NUM) {
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debug("parameter fet_id is out of range, %u not in 1 ~ %u\n",
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fet_id, MAX_FET_NUM);
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return -EINVAL;
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}
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return 0;
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}
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/**
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* Set the power state for a FET
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*
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* @param pmic pmic structure for the tps65090
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* @param fet_id Fet number to set (1..MAX_FET_NUM)
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* @param set 1 to power on FET, 0 to power off
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* @return -EIO if we got a comms error, -EAGAIN if the FET failed to
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* change state. If all is ok, returns 0.
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*/
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static int tps65090_fet_set(struct pmic *pmic, int fet_id, bool set)
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{
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int retry;
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u32 reg, value;
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value = FET_CTRL_ADENFET | FET_CTRL_WAIT;
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if (set)
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value |= FET_CTRL_ENFET;
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if (pmic_reg_write(pmic, REG_FET1_CTRL + fet_id - 1, value))
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return -EIO;
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/* Try reading until we get a result */
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for (retry = 0; retry < MAX_CTRL_READ_TRIES; retry++) {
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if (pmic_reg_read(pmic, REG_FET1_CTRL + fet_id - 1, ®))
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return -EIO;
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/* Check that the fet went into the expected state */
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if (!!(reg & FET_CTRL_PGFET) == set)
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return 0;
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/* If we got a timeout, there is no point in waiting longer */
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if (reg & FET_CTRL_TOFET)
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break;
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mdelay(1);
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}
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debug("FET %d: Power good should have set to %d but reg=%#02x\n",
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fet_id, set, reg);
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return -EAGAIN;
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}
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int tps65090_fet_enable(unsigned int fet_id)
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{
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struct pmic *pmic;
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ulong start;
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int loops;
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int ret;
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ret = tps65090_check_fet(fet_id);
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if (ret)
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return ret;
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pmic = pmic_get(TPS65090_NAME);
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if (!pmic)
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return -EACCES;
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start = get_timer(0);
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for (loops = 0;; loops++) {
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ret = tps65090_fet_set(pmic, fet_id, true);
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if (!ret)
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break;
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if (get_timer(start) > 100)
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break;
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/* Turn it off and try again until we time out */
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tps65090_fet_set(pmic, fet_id, false);
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}
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if (ret)
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debug("%s: FET%d failed to power on: time=%lums, loops=%d\n",
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__func__, fet_id, get_timer(start), loops);
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else if (loops)
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debug("%s: FET%d powered on after %lums, loops=%d\n",
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__func__, fet_id, get_timer(start), loops);
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/*
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* Unfortunately, there are some conditions where the power
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* good bit will be 0, but the fet still comes up. One such
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* case occurs with the lcd backlight. We'll just return 0 here
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* and assume that the fet will eventually come up.
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*/
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if (ret == -EAGAIN)
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ret = 0;
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return ret;
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}
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int tps65090_fet_disable(unsigned int fet_id)
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{
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struct pmic *pmic;
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int ret;
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ret = tps65090_check_fet(fet_id);
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if (ret)
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return ret;
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pmic = pmic_get(TPS65090_NAME);
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if (!pmic)
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return -EACCES;
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ret = tps65090_fet_set(pmic, fet_id, false);
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return ret;
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}
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int tps65090_fet_is_enabled(unsigned int fet_id)
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{
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struct pmic *pmic;
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u32 reg;
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int ret;
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ret = tps65090_check_fet(fet_id);
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if (ret)
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return ret;
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pmic = pmic_get(TPS65090_NAME);
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if (!pmic)
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return -ENODEV;
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ret = pmic_reg_read(pmic, REG_FET1_CTRL + fet_id - 1, ®);
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if (ret) {
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debug("fail to read FET%u_CTRL register over I2C", fet_id);
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return -EIO;
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}
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return reg & FET_CTRL_ENFET;
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}
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int tps65090_get_charging(void)
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{
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struct pmic *pmic;
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u32 val;
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int ret;
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pmic = pmic_get(TPS65090_NAME);
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if (!pmic)
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return -EACCES;
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ret = pmic_reg_read(pmic, REG_CG_CTRL0, &val);
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if (ret)
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return ret;
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return !!(val & CG_CTRL0_ENC_MASK);
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}
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static int tps65090_charger_state(struct pmic *pmic, int state,
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int current)
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{
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u32 val;
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int ret;
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ret = pmic_reg_read(pmic, REG_CG_CTRL0, &val);
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if (!ret) {
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if (state == PMIC_CHARGER_ENABLE)
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val |= CG_CTRL0_ENC_MASK;
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else
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val &= ~CG_CTRL0_ENC_MASK;
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ret = pmic_reg_write(pmic, REG_CG_CTRL0, val);
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}
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if (ret) {
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debug("%s: Failed to read/write register\n", __func__);
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return ret;
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}
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return 0;
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}
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int tps65090_get_status(void)
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{
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struct pmic *pmic;
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u32 val;
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int ret;
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pmic = pmic_get(TPS65090_NAME);
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if (!pmic)
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return -EACCES;
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ret = pmic_reg_read(pmic, REG_CG_STATUS1, &val);
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if (ret)
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return ret;
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return val;
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}
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static int tps65090_charger_bat_present(struct pmic *pmic)
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{
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u32 val;
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int ret;
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ret = pmic_reg_read(pmic, REG_IRQ1, &val);
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if (ret)
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return ret;
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return !!(val & IRQ1_VBATG);
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}
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static struct power_chrg power_chrg_pmic_ops = {
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.chrg_bat_present = tps65090_charger_bat_present,
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.chrg_state = tps65090_charger_state,
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};
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int tps65090_init(void)
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{
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struct pmic *p;
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int bus;
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int addr;
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const void *blob = gd->fdt_blob;
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int node, parent;
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node = fdtdec_next_compatible(blob, 0, COMPAT_TI_TPS65090);
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if (node < 0) {
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debug("PMIC: No node for PMIC Chip in device tree\n");
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debug("node = %d\n", node);
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return -ENODEV;
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}
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parent = fdt_parent_offset(blob, node);
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if (parent < 0) {
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debug("%s: Cannot find node parent\n", __func__);
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return -EINVAL;
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}
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bus = i2c_get_bus_num_fdt(parent);
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if (bus < 0) {
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debug("%s: Cannot find I2C bus\n", __func__);
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return -ENOENT;
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}
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addr = fdtdec_get_int(blob, node, "reg", TPS65090_I2C_ADDR);
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p = pmic_alloc();
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if (!p) {
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printf("%s: POWER allocation error!\n", __func__);
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return -ENOMEM;
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}
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p->name = TPS65090_NAME;
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p->bus = bus;
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p->interface = PMIC_I2C;
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p->number_of_regs = TPS65090_NUM_REGS;
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p->hw.i2c.addr = addr;
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p->hw.i2c.tx_num = 1;
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p->chrg = &power_chrg_pmic_ops;
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puts("TPS65090 PMIC init\n");
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return 0;
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}
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