static int pm8901_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int i, rc;
struct pm8901_platform_data *pdata = client->dev.platform_data;
struct pm8901_chip *chip;
if (pdata == NULL || !client->irq) {
pr_err("%s: No platform_data or IRQ.\n", __func__);
return -ENODEV;
}
if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
pr_err("%s: i2c_check_functionality failed.\n", __func__);
return -ENODEV;
}
chip = kzalloc(sizeof *chip, GFP_KERNEL);
if (chip == NULL) {
pr_err("%s: kzalloc() failed.\n", __func__);
return -ENOMEM;
}
chip->dev = client;
/* Read PMIC chip revision */
rc = ssbi_read(chip->dev, SSBI_REG_REV, &chip->revision, 1);
if (rc)
pr_err("%s: Failed on ssbi_read for revision: rc=%d.\n",
__func__, rc);
pr_info("%s: PMIC revision: %X\n", __func__, chip->revision);
(void) memcpy((void *)&chip->pdata, (const void *)pdata,
sizeof(chip->pdata));
set_irq_data(chip->dev->irq, (void *)chip);
set_irq_wake(chip->dev->irq, 1);
chip->pm_max_irq = 0;
chip->pm_max_blocks = 0;
chip->pm_max_masters = 0;
i2c_set_clientdata(client, chip);
pmic_chip = chip;
spin_lock_init(&chip->pm_lock);
// kmj_el15.pm8901_patch
// This api is s/w workaround for PM8901's abnormal spike which could
// cause DDR problem on PCB. Because of the spike SS made new PCB for
// h/w workaround. This s/w workaround is for old PCBs. And If a target
// is new PCB, you should call a api to drop bypass voltage
// to 1.725 originally. But you don't need that here, bacause you've done
// that already at SBL3. So instead of calling api to drop bypass voltage
// here you just need to check if SBL3 bootloader includes the api.
// In other words this api has dependency with SBL3 change
if( pm8901_is_old_PCB_with_PM8901()==1 )
pm8901_preload_dVdd();
/* Register for all reserved IRQs */
for (i = pdata->irq_base; i < (pdata->irq_base + MAX_PM_IRQ); i++) {
set_irq_chip(i, &pm8901_irq_chip);
set_irq_handler(i, handle_edge_irq);
set_irq_flags(i, IRQF_VALID);
set_irq_data(i, (void *)chip);
}
/* Add sub devices with the chip parameter as driver data */
for (i = 0; i < pdata->num_subdevs; i++)
pdata->sub_devices[i].driver_data = chip;
rc = mfd_add_devices(&chip->dev->dev, 0, pdata->sub_devices,
pdata->num_subdevs, NULL, 0);
if (rc) {
pr_err("%s: could not add devices %d\n", __func__, rc);
return rc;
}
rc = request_threaded_irq(chip->dev->irq, NULL, pm8901_isr_thread,
IRQF_ONESHOT | IRQF_DISABLED | pdata->irq_trigger_flags,
"pm8901-irq", chip);
if (rc)
pr_err("%s: could not request irq %d: %d\n", __func__,
chip->dev->irq, rc);
rc = pmic8901_dbg_probe(chip);
if (rc < 0)
pr_err("%s: could not set up debugfs: %d\n", __func__, rc);
return rc;
}
static int __devinit pm8901_probe(struct platform_device *pdev)
{
int rc;
struct pm8901_platform_data *pdata = pdev->dev.platform_data;
const char *revision_name = "unknown";
struct pm8901_chip *pmic;
int revision;
if (pdata == NULL) {
pr_err("%s: No platform_data or IRQ.\n", __func__);
return -ENODEV;
}
pmic = kzalloc(sizeof *pmic, GFP_KERNEL);
if (pmic == NULL) {
pr_err("%s: kzalloc() failed.\n", __func__);
return -ENOMEM;
}
pmic->dev = &pdev->dev;
pm8901_drvdata.pm_chip_data = pmic;
platform_set_drvdata(pdev, &pm8901_drvdata);
/* Read PMIC chip revision */
rc = pm8901_readb(pmic->dev, PM8901_REG_REV, &pmic->revision);
if (rc)
pr_err("%s: Failed reading version register rc=%d.\n",
__func__, rc);
pr_info("%s: PMIC revision reg: %02X\n", __func__, pmic->revision);
revision = pm8xxx_get_revision(pmic->dev);
if (revision >= 0 && revision < ARRAY_SIZE(pm8901_rev_names))
revision_name = pm8901_rev_names[revision];
pr_info("%s: PMIC version: PM8901 rev %s\n", __func__, revision_name);
// This api is s/w workaround for PM8901's abnormal spike which could
// cause DDR problem on PCB. Because of the spike SS made new PCB for
// h/w workaround. This s/w workaround is for old PCBs. And If a target
// is new PCB, you should call a api to drop bypass voltage
// to 1.725 originally. But you don't need that here, bacause you've done
// that already at SBL3. So instead of calling api to drop bypass voltage
// here you just need to check if SBL3 bootloader includes the api.
// In other words this api has dependency with SBL3 change
if( pm8901_is_old_PCB_with_PM8901()==1 )
pm8901_preload_dVdd_old();
(void) memcpy((void *)&pmic->pdata, (const void *)pdata,
sizeof(pmic->pdata));
rc = pm8901_add_subdevices(pdata, pmic);
if (rc) {
pr_err("Cannot add subdevices rc=%d\n", rc);
goto err;
}
return 0;
err:
platform_set_drvdata(pdev, NULL);
kfree(pmic);
return rc;
}
