static int as3722_gpio_set(struct udevice *pmic, unsigned int gpio,
unsigned int level)
{
const char *l;
u8 value;
int err;
if (gpio > 7)
return -EINVAL;
err = as3722_read(pmic, AS3722_GPIO_SIGNAL_OUT, &value);
if (err < 0) {
error("failed to read GPIO signal out register: %d", err);
return err;
}
if (level == 0) {
value &= ~(1 << gpio);
l = "low";
} else {
value |= 1 << gpio;
l = "high";
}
err = as3722_write(pmic, AS3722_GPIO_SIGNAL_OUT, value);
if (err) {
error("failed to set GPIO#%u %s: %d", gpio, l, err);
return err;
}
return 0;
}
int as3722_gpio_direction_output(struct udevice *pmic, unsigned int gpio,
unsigned int level)
{
u8 value;
int err;
if (gpio > 7)
return -EINVAL;
if (level == 0)
value = AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDL;
else
value = AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDH;
err = as3722_write(pmic, AS3722_GPIO_CONTROL(gpio), value);
if (err) {
error("failed to configure GPIO#%u as output: %d", gpio, err);
return err;
}
err = as3722_gpio_set(pmic, gpio, level);
if (err < 0) {
error("failed to set GPIO#%u high: %d", gpio, err);
return err;
}
return 0;
}
int tegra_lcd_pmic_init(int board_id)
{
struct udevice *pmic;
int ret;
ret = as3722_get(&pmic);
if (ret)
return -ENOENT;
if (board_id == 0)
as3722_write(pmic, 0x00, 0x3c);
else
as3722_write(pmic, 0x00, 0x50);
as3722_write(pmic, 0x12, 0x10);
as3722_write(pmic, 0x0c, 0x07);
as3722_write(pmic, 0x20, 0x10);
return 0;
}
static void as3722rtc_init(void)
{
static int initialized;
if (initialized)
return;
uint8_t control = as3722_read(AS3722_RTC_CONTROL);
as3722_write(AS3722_RTC_CONTROL, control | AS3722_RTC_CONTROL_ON);
initialized = 1;
}
int as3722_sd_set_voltage(struct udevice *pmic, unsigned int sd, u8 value)
{
int err;
if (sd > 6)
return -EINVAL;
err = as3722_write(pmic, AS3722_SD_VOLTAGE(sd), value);
if (err < 0) {
error("failed to write SD%u voltage register: %d", sd, err);
return err;
}
return 0;
}
int as3722_ldo_set_voltage(struct udevice *pmic, unsigned int ldo, u8 value)
{
int err;
if (ldo > 11)
return -EINVAL;
err = as3722_write(pmic, AS3722_LDO_VOLTAGE(ldo), value);
if (err < 0) {
error("failed to write LDO%u voltage register: %d", ldo,
err);
return err;
}
return 0;
}
int rtc_set(const struct rtc_time *time)
{
as3722rtc_init();
as3722_write(AS3722_RTC_SECOND, bin2bcd(time->sec));
as3722_write(AS3722_RTC_MINUTE, bin2bcd(time->min));
as3722_write(AS3722_RTC_HOUR, bin2bcd(time->hour));
as3722_write(AS3722_RTC_DAY, bin2bcd(time->mday));
as3722_write(AS3722_RTC_MONTH, bin2bcd(time->mon));
as3722_write(AS3722_RTC_YEAR, bin2bcd(time->year));
return 0;
}
int as3722_gpio_configure(struct udevice *pmic, unsigned int gpio,
unsigned long flags)
{
u8 value = 0;
int err;
if (flags & AS3722_GPIO_OUTPUT_VDDH)
value |= AS3722_GPIO_CONTROL_MODE_OUTPUT_VDDH;
if (flags & AS3722_GPIO_INVERT)
value |= AS3722_GPIO_CONTROL_INVERT;
err = as3722_write(pmic, AS3722_GPIO_CONTROL(gpio), value);
if (err) {
error("failed to configure GPIO#%u: %d", gpio, err);
return err;
}
return 0;
}
static void
as3722_attach(device_t parent, device_t self, void *aux)
{
struct as3722_softc * const sc = device_private(self);
struct i2c_attach_args *ia = aux;
int error;
sc->sc_dev = self;
sc->sc_i2c = ia->ia_tag;
sc->sc_addr = ia->ia_addr;
aprint_naive("\n");
aprint_normal(": AMS AS3822\n");
iic_acquire_bus(sc->sc_i2c, I2C_F_POLL);
error = as3722_write(sc, AS3722_GPIO0_CTRL_REG,
__SHIFTIN(AS3722_GPIO0_CTRL_IOSF_GPIO,
AS3722_GPIO0_CTRL_IOSF) |
__SHIFTIN(AS3722_GPIO0_CTRL_MODE_PULLDOWN,
AS3722_GPIO0_CTRL_MODE),
I2C_F_POLL);
error += as3722_set_clear(sc, AS3722_WATCHDOG_CTRL_REG,
__SHIFTIN(1, AS3722_WATCHDOG_CTRL_MODE), 0, I2C_F_POLL);
iic_release_bus(sc->sc_i2c, I2C_F_POLL);
if (error)
aprint_error_dev(self, "couldn't setup watchdog\n");
sc->sc_smw.smw_name = device_xname(self);
sc->sc_smw.smw_cookie = sc;
sc->sc_smw.smw_setmode = as3722_wdt_setmode;
sc->sc_smw.smw_tickle = as3722_wdt_tickle;
sc->sc_smw.smw_period = AS3722_WATCHDOG_DEFAULT_PERIOD;
aprint_normal_dev(self, "default watchdog period is %u seconds\n",
sc->sc_smw.smw_period);
if (sysmon_wdog_register(&sc->sc_smw) != 0)
aprint_error_dev(self, "couldn't register with sysmon\n");
}
int as3722_sd_enable(struct udevice *pmic, unsigned int sd)
{
u8 value;
int err;
if (sd > 6)
return -EINVAL;
err = as3722_read(pmic, AS3722_SD_CONTROL, &value);
if (err) {
error("failed to read SD control register: %d", err);
return err;
}
value |= 1 << sd;
err = as3722_write(pmic, AS3722_SD_CONTROL, value);
if (err < 0) {
error("failed to write SD control register: %d", err);
return err;
}
return 0;
}
int as3722_ldo_enable(struct udevice *pmic, unsigned int ldo)
{
u8 value;
int err;
if (ldo > 11)
return -EINVAL;
err = as3722_read(pmic, AS3722_LDO_CONTROL, &value);
if (err) {
error("failed to read LDO control register: %d", err);
return err;
}
value |= 1 << ldo;
err = as3722_write(pmic, AS3722_LDO_CONTROL, value);
if (err < 0) {
error("failed to write LDO control register: %d", err);
return err;
}
return 0;
}