diff options
Diffstat (limited to 'drivers/tty/serial/serial_core.c')
-rw-r--r-- | drivers/tty/serial/serial_core.c | 70 |
1 files changed, 1 insertions, 69 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 0a4e6eeb5ff3..70402cdb4d8c 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2724,57 +2724,6 @@ static ssize_t uart_get_attr_iomem_reg_shift(struct device *dev, return snprintf(buf, PAGE_SIZE, "%d\n", tmp.iomem_reg_shift); } -static ssize_t pps_4wire_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct tty_port *port = dev_get_drvdata(dev); - struct uart_state *state = container_of(port, struct uart_state, port); - struct uart_port *uport; - int mode = 0; - - mutex_lock(&port->mutex); - uport = uart_port_check(state); - if (!uport) - goto out; - - mode = uport->pps_4wire; - -out: - mutex_unlock(&port->mutex); - return sprintf(buf, mode ? "yes\n" : "no\n"); -} - -static ssize_t pps_4wire_store(struct device *dev, - struct device_attribute *attr, const char *buf, size_t count) -{ - struct tty_port *port = dev_get_drvdata(dev); - struct uart_state *state = container_of(port, struct uart_state, port); - struct uart_port *uport; - bool mode; - int ret; - - if (!count) - return -EINVAL; - - ret = kstrtobool(buf, &mode); - if (ret < 0) - return ret; - - mutex_lock(&port->mutex); - uport = uart_port_check(state); - if (!uport) - goto out; - - spin_lock_irq(&uport->lock); - uport->pps_4wire = mode; - spin_unlock_irq(&uport->lock); - -out: - mutex_unlock(&port->mutex); - return count; -} -static DEVICE_ATTR_RW(pps_4wire); - static DEVICE_ATTR(type, S_IRUSR | S_IRGRP, uart_get_attr_type, NULL); static DEVICE_ATTR(line, S_IRUSR | S_IRGRP, uart_get_attr_line, NULL); static DEVICE_ATTR(port, S_IRUSR | S_IRGRP, uart_get_attr_port, NULL); @@ -2803,7 +2752,6 @@ static struct attribute *tty_dev_attrs[] = { &dev_attr_io_type.attr, &dev_attr_iomem_base.attr, &dev_attr_iomem_reg_shift.attr, - &dev_attr_pps_4wire.attr, NULL, }; @@ -2860,9 +2808,6 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport) goto out; } - /* assert that pps handling is done via DCD as default */ - uport->pps_4wire = 0; - /* * If this port is a console, then the spinlock is already * initialised. @@ -3038,7 +2983,7 @@ void uart_handle_dcd_change(struct uart_port *uport, unsigned int status) lockdep_assert_held_once(&uport->lock); - if (tty && !uport->pps_4wire) { + if (tty) { ld = tty_ldisc_ref(tty); if (ld) { if (ld->ops->dcd_change) @@ -3067,21 +3012,8 @@ EXPORT_SYMBOL_GPL(uart_handle_dcd_change); */ void uart_handle_cts_change(struct uart_port *uport, unsigned int status) { - struct tty_port *port = &uport->state->port; - struct tty_struct *tty = port->tty; - struct tty_ldisc *ld; - lockdep_assert_held_once(&uport->lock); - if (tty && uport->pps_4wire) { - ld = tty_ldisc_ref(tty); - if (ld) { - if (ld->ops->dcd_change) - ld->ops->dcd_change(tty, status); - tty_ldisc_deref(ld); - } - } - uport->icount.cts++; if (uart_softcts_mode(uport)) { |