static int da9052_wdt_ping(struct watchdog_device *wdt_dev)
{
struct da9052_wdt_data *driver_data = watchdog_get_drvdata(wdt_dev);
struct da9052 *da9052 = driver_data->da9052;
unsigned long msec, jnow = jiffies;
int ret;
/*
* We have a minimum time for watchdog window called TWDMIN. A write
* to the watchdog before this elapsed time should cause an error.
*/
msec = (jnow - driver_data->jpast) * 1000/HZ;
if (msec < DA9052_TWDMIN)
mdelay(msec);
/* Reset the watchdog timer */
ret = da9052_reg_update(da9052, DA9052_CONTROL_D_REG,
DA9052_CONTROLD_WATCHDOG, 1 << 7);
if (ret < 0)
goto err_strobe;
/*
* FIXME: Reset the watchdog core, in general PMIC
* is supposed to do this
*/
ret = da9052_reg_update(da9052, DA9052_CONTROL_D_REG,
DA9052_CONTROLD_WATCHDOG, 0 << 7);
err_strobe:
return ret;
}
static int da9052_configure_leds(struct da9052 *da9052)
{
int error;
unsigned char register_value = DA9052_OPENDRAIN_OUTPUT
| DA9052_SET_HIGH_LVL_OUTPUT;
error = da9052_reg_update(da9052, DA9052_GPIO_14_15_REG,
DA9052_MASK_LOWER_NIBBLE,
register_value);
if (error < 0) {
dev_err(da9052->dev, "Failed to write GPIO 14-15 reg, %d\n",
error);
return error;
}
error = da9052_reg_update(da9052, DA9052_GPIO_14_15_REG,
DA9052_MASK_UPPER_NIBBLE,
register_value << DA9052_NIBBLE_SHIFT);
if (error < 0)
dev_err(da9052->dev, "Failed to write GPIO 14-15 reg, %d\n",
error);
return error;
}
static int da9052_set_alarm(struct da9052 *da9052, struct rtc_time *rtc_tm)
{
int ret;
uint8_t v[3];
rtc_tm->tm_year -= 100;
rtc_tm->tm_mon += 1;
ret = da9052_reg_update(da9052, DA9052_ALARM_MI_REG,
DA9052_RTC_MIN, rtc_tm->tm_min);
if (ret != 0) {
rtc_err(da9052, "Failed to write ALRM MIN: %d\n", ret);
return ret;
}
v[0] = rtc_tm->tm_hour;
v[1] = rtc_tm->tm_mday;
v[2] = rtc_tm->tm_mon;
ret = da9052_group_write(da9052, DA9052_ALARM_H_REG, 3, v);
if (ret < 0)
return ret;
ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG,
DA9052_RTC_YEAR, rtc_tm->tm_year);
if (ret != 0)
rtc_err(da9052, "Failed to write ALRM YEAR: %d\n", ret);
return ret;
}
static int da9052_wdt_set_timeout(struct watchdog_device *wdt_dev,
unsigned int timeout)
{
struct da9052_wdt_data *driver_data = watchdog_get_drvdata(wdt_dev);
struct da9052 *da9052 = driver_data->da9052;
int ret, i;
/*
* Disable the Watchdog timer before setting
* new time out.
*/
ret = da9052_reg_update(da9052, DA9052_CONTROL_D_REG,
DA9052_CONTROLD_TWDSCALE, 0);
if (ret < 0) {
dev_err(da9052->dev, "Failed to disable watchdog bit, %d\n",
ret);
return ret;
}
if (timeout) {
/*
* To change the timeout, da9052 needs to
* be disabled for at least 150 us.
*/
udelay(150);
/* Set the desired timeout */
for (i = 0; i < ARRAY_SIZE(da9052_wdt_maps); i++)
if (da9052_wdt_maps[i].time == timeout)
break;
if (i == ARRAY_SIZE(da9052_wdt_maps))
ret = -EINVAL;
else
ret = da9052_reg_update(da9052, DA9052_CONTROL_D_REG,
DA9052_CONTROLD_TWDSCALE,
da9052_wdt_maps[i].reg_val);
if (ret < 0) {
dev_err(da9052->dev,
"Failed to update timescale bit, %d\n", ret);
return ret;
}
wdt_dev->timeout = timeout;
driver_data->jpast = jiffies;
}
return 0;
}
static int da9052_USB_current_notifier(struct notifier_block *nb,
unsigned long events, void *data)
{
u8 row;
u8 col;
int *current_mA = data;
int ret;
struct da9052_battery *bat = container_of(nb, struct da9052_battery,
nb);
if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING)
return -EPERM;
ret = da9052_reg_read(bat->da9052, DA9052_CHGBUCK_REG);
if (ret & DA9052_CHG_USB_ILIM_MASK)
return -EPERM;
if (bat->da9052->chip_id == DA9052)
row = 0;
else
row = 1;
if (*current_mA < da9052_chg_current_lim[row][0] ||
*current_mA > da9052_chg_current_lim[row][DA9052_CHG_LIM_COLS - 1])
return -EINVAL;
for (col = 0; col <= DA9052_CHG_LIM_COLS - 1 ; col++) {
if (*current_mA <= da9052_chg_current_lim[row][col])
break;
}
return da9052_reg_update(bat->da9052, DA9052_ISET_REG,
DA9052_ISET_USB_MASK, col);
}
static int da9052_rtc_probe(struct platform_device *pdev)
{
struct da9052_rtc *rtc;
int ret;
rtc = devm_kzalloc(&pdev->dev, sizeof(struct da9052_rtc), GFP_KERNEL);
if (!rtc)
return -ENOMEM;
rtc->da9052 = dev_get_drvdata(pdev->dev.parent);
platform_set_drvdata(pdev, rtc);
ret = da9052_reg_write(rtc->da9052, DA9052_BBAT_CONT_REG, 0xFE);
if (ret < 0) {
rtc_err(rtc,
"Failed to setup RTC battery charging: %d\n", ret);
return ret;
}
ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
DA9052_ALARM_Y_TICK_ON, 0);
if (ret != 0)
rtc_err(rtc, "Failed to disable TICKS: %d\n", ret);
ret = da9052_request_irq(rtc->da9052, DA9052_IRQ_ALARM, "ALM",
da9052_rtc_irq, rtc);
if (ret != 0) {
rtc_err(rtc, "irq registration failed: %d\n", ret);
return ret;
}
rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
&da9052_rtc_ops, THIS_MODULE);
return PTR_ERR_OR_ZERO(rtc->rtc);
}
static int da9052_rtc_enable_alarm(struct da9052 *da9052, bool enable)
{
int ret;
if (enable) {
ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG,
DA9052_ALARM_Y_ALARM_ON,
DA9052_ALARM_Y_ALARM_ON);
if (ret != 0)
rtc_err(da9052, "Failed to enable ALM: %d\n", ret);
} else {
ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG,
DA9052_ALARM_Y_ALARM_ON, 0);
if (ret != 0)
rtc_err(da9052, "Write error: %d\n", ret);
}
return ret;
}
static int da9052_set_alarm(struct da9052_rtc *rtc, struct rtc_time *rtc_tm)
{
struct da9052 *da9052 = rtc->da9052;
unsigned long alm_time;
int ret;
uint8_t v[3];
ret = rtc_tm_to_time(rtc_tm, &alm_time);
if (ret != 0)
return ret;
if (rtc_tm->tm_sec > 0) {
alm_time += 60 - rtc_tm->tm_sec;
rtc_time_to_tm(alm_time, rtc_tm);
}
BUG_ON(rtc_tm->tm_sec); /* it will cause repeated irqs if not zero */
rtc_tm->tm_year -= 100;
rtc_tm->tm_mon += 1;
ret = da9052_reg_update(da9052, DA9052_ALARM_MI_REG,
DA9052_RTC_MIN, rtc_tm->tm_min);
if (ret != 0) {
rtc_err(rtc, "Failed to write ALRM MIN: %d\n", ret);
return ret;
}
v[0] = rtc_tm->tm_hour;
v[1] = rtc_tm->tm_mday;
v[2] = rtc_tm->tm_mon;
ret = da9052_group_write(da9052, DA9052_ALARM_H_REG, 3, v);
if (ret < 0)
return ret;
ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG,
DA9052_RTC_YEAR, rtc_tm->tm_year);
if (ret != 0)
rtc_err(rtc, "Failed to write ALRM YEAR: %d\n", ret);
return ret;
}
static int da9052_wdt_probe(struct platform_device *pdev)
{
struct da9052 *da9052 = dev_get_drvdata(pdev->dev.parent);
struct da9052_wdt_data *driver_data;
struct watchdog_device *da9052_wdt;
int ret;
driver_data = devm_kzalloc(&pdev->dev, sizeof(*driver_data),
GFP_KERNEL);
if (!driver_data) {
ret = -ENOMEM;
goto err;
}
driver_data->da9052 = da9052;
da9052_wdt = &driver_data->wdt;
da9052_wdt->timeout = DA9052_DEF_TIMEOUT;
da9052_wdt->info = &da9052_wdt_info;
da9052_wdt->ops = &da9052_wdt_ops;
da9052_wdt->parent = &pdev->dev;
watchdog_set_drvdata(da9052_wdt, driver_data);
ret = da9052_reg_update(da9052, DA9052_CONTROL_D_REG,
DA9052_CONTROLD_TWDSCALE, 0);
if (ret < 0) {
dev_err(&pdev->dev, "Failed to disable watchdog bits, %d\n",
ret);
goto err;
}
ret = watchdog_register_device(&driver_data->wdt);
if (ret != 0) {
dev_err(da9052->dev, "watchdog_register_device() failed: %d\n",
ret);
goto err;
}
platform_set_drvdata(pdev, driver_data);
err:
return ret;
}