diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/sc16is7xx.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c index f36e6df2fa90..a9d94f7cf683 100644 --- a/drivers/tty/serial/sc16is7xx.c +++ b/drivers/tty/serial/sc16is7xx.c @@ -1205,6 +1205,10 @@ static int sc16is7xx_probe(struct device *dev, } #endif + /* reset device, purging any pending irq / data */ + regmap_write(s->regmap, SC16IS7XX_IOCONTROL_REG << SC16IS7XX_REG_SHIFT, + SC16IS7XX_IOCONTROL_SRESET_BIT); + for (i = 0; i < devtype->nr_uart; ++i) { s->p[i].line = i; /* Initialize port data */ @@ -1234,6 +1238,22 @@ static int sc16is7xx_probe(struct device *dev, init_kthread_work(&s->p[i].reg_work, sc16is7xx_reg_proc); /* Register port */ uart_add_one_port(&sc16is7xx_uart, &s->p[i].port); + + /* Enable EFR */ + sc16is7xx_port_write(&s->p[i].port, SC16IS7XX_LCR_REG, + SC16IS7XX_LCR_CONF_MODE_B); + + regcache_cache_bypass(s->regmap, true); + + /* Enable write access to enhanced features */ + sc16is7xx_port_write(&s->p[i].port, SC16IS7XX_EFR_REG, + SC16IS7XX_EFR_ENABLE_BIT); + + regcache_cache_bypass(s->regmap, false); + + /* Restore access to general registers */ + sc16is7xx_port_write(&s->p[i].port, SC16IS7XX_LCR_REG, 0x00); + /* Go to suspend mode */ sc16is7xx_power(&s->p[i].port, 0); } |
