static ssize_t rp5c01_nvram_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t pos, size_t size)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct rp5c01_priv *priv = dev_get_drvdata(dev);
ssize_t count;
spin_lock_irq(&priv->lock);
for (count = 0; size > 0 && pos < RP5C01_MODE; count++, size--) {
u8 data = *buf++;
rp5c01_write(priv,
RP5C01_MODE_TIMER_EN | RP5C01_MODE_RAM_BLOCK10,
RP5C01_MODE);
rp5c01_write(priv, data >> 4, pos);
rp5c01_write(priv,
RP5C01_MODE_TIMER_EN | RP5C01_MODE_RAM_BLOCK11,
RP5C01_MODE);
rp5c01_write(priv, data & 0xf, pos++);
rp5c01_write(priv, RP5C01_MODE_TIMER_EN | RP5C01_MODE_MODE01,
RP5C01_MODE);
}
spin_unlock_irq(&priv->lock);
return count;
}
static int rp5c01_nvram_write(void *_priv, unsigned int pos, void *val,
size_t bytes)
{
struct rp5c01_priv *priv = _priv;
u8 *buf = val;
spin_lock_irq(&priv->lock);
for (; bytes; bytes--) {
u8 data = *buf++;
rp5c01_write(priv,
RP5C01_MODE_TIMER_EN | RP5C01_MODE_RAM_BLOCK10,
RP5C01_MODE);
rp5c01_write(priv, data >> 4, pos);
rp5c01_write(priv,
RP5C01_MODE_TIMER_EN | RP5C01_MODE_RAM_BLOCK11,
RP5C01_MODE);
rp5c01_write(priv, data & 0xf, pos++);
rp5c01_write(priv, RP5C01_MODE_TIMER_EN | RP5C01_MODE_MODE01,
RP5C01_MODE);
}
spin_unlock_irq(&priv->lock);
return 0;
}
static void rp5c01_unlock(struct rp5c01_priv *priv)
{
rp5c01_write(priv, RP5C01_MODE_TIMER_EN | RP5C01_MODE_MODE01,
RP5C01_MODE);
}
static void rp5c01_lock(struct rp5c01_priv *priv)
{
rp5c01_write(priv, RP5C01_MODE_MODE00, RP5C01_MODE);
}
static int rp5c01_set_time(struct device *dev, struct rtc_time *tm)
{
struct rp5c01_priv *priv = dev_get_drvdata(dev);
spin_lock_irq(&priv->lock);
rp5c01_lock(priv);
rp5c01_write(priv, tm->tm_sec / 10, RP5C01_10_SECOND);
rp5c01_write(priv, tm->tm_sec % 10, RP5C01_1_SECOND);
rp5c01_write(priv, tm->tm_min / 10, RP5C01_10_MINUTE);
rp5c01_write(priv, tm->tm_min % 10, RP5C01_1_MINUTE);
rp5c01_write(priv, tm->tm_hour / 10, RP5C01_10_HOUR);
rp5c01_write(priv, tm->tm_hour % 10, RP5C01_1_HOUR);
rp5c01_write(priv, tm->tm_mday / 10, RP5C01_10_DAY);
rp5c01_write(priv, tm->tm_mday % 10, RP5C01_1_DAY);
if (tm->tm_wday != -1)
rp5c01_write(priv, tm->tm_wday, RP5C01_DAY_OF_WEEK);
rp5c01_write(priv, (tm->tm_mon + 1) / 10, RP5C01_10_MONTH);
rp5c01_write(priv, (tm->tm_mon + 1) % 10, RP5C01_1_MONTH);
if (tm->tm_year >= 100)
tm->tm_year -= 100;
rp5c01_write(priv, tm->tm_year / 10, RP5C01_10_YEAR);
rp5c01_write(priv, tm->tm_year % 10, RP5C01_1_YEAR);
rp5c01_unlock(priv);
spin_unlock_irq(&priv->lock);
return 0;
}