summaryrefslogtreecommitdiffstats
path: root/drivers/tty/serial/omap-serial.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/tty/serial/omap-serial.c')
-rw-r--r--drivers/tty/serial/omap-serial.c52
1 files changed, 28 insertions, 24 deletions
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index f7d6b3c9ea45..8573fc9cb0cd 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -33,8 +33,7 @@
#include <linux/pm_wakeirq.h>
#include <linux/of.h>
#include <linux/of_irq.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/platform_data/serial-omap.h>
#define OMAP_MAX_HSUART_PORTS 10
@@ -153,7 +152,7 @@ struct uart_omap_port {
u32 errata;
u32 features;
- int rts_gpio;
+ struct gpio_desc *rts_gpiod;
struct pm_qos_request pm_qos_request;
u32 latency;
@@ -303,11 +302,11 @@ static void serial_omap_stop_tx(struct uart_port *port)
serial_out(up, UART_OMAP_SCR, up->scr);
res = (port->rs485.flags & SER_RS485_RTS_AFTER_SEND) ?
1 : 0;
- if (gpio_get_value(up->rts_gpio) != res) {
+ if (gpiod_get_value(up->rts_gpiod) != res) {
if (port->rs485.delay_rts_after_send > 0)
mdelay(
port->rs485.delay_rts_after_send);
- gpio_set_value(up->rts_gpio, res);
+ gpiod_set_value(up->rts_gpiod, res);
}
} else {
/* We're asked to stop, but there's still stuff in the
@@ -412,8 +411,8 @@ static void serial_omap_start_tx(struct uart_port *port)
/* if rts not already enabled */
res = (port->rs485.flags & SER_RS485_RTS_ON_SEND) ? 1 : 0;
- if (gpio_get_value(up->rts_gpio) != res) {
- gpio_set_value(up->rts_gpio, res);
+ if (gpiod_get_value(up->rts_gpiod) != res) {
+ gpiod_set_value(up->rts_gpiod, res);
if (port->rs485.delay_rts_before_send > 0)
mdelay(port->rs485.delay_rts_before_send);
}
@@ -1414,12 +1413,12 @@ serial_omap_config_rs485(struct uart_port *port, struct serial_rs485 *rs485)
* Just as a precaution, only allow rs485
* to be enabled if the gpio pin is valid
*/
- if (gpio_is_valid(up->rts_gpio)) {
+ if (up->rts_gpiod) {
/* enable / disable rts */
val = (port->rs485.flags & SER_RS485_ENABLED) ?
SER_RS485_RTS_AFTER_SEND : SER_RS485_RTS_ON_SEND;
val = (port->rs485.flags & val) ? 1 : 0;
- gpio_set_value(up->rts_gpio, val);
+ gpiod_set_value(up->rts_gpiod, val);
} else
port->rs485.flags &= ~SER_RS485_ENABLED;
@@ -1596,18 +1595,22 @@ static struct omap_uart_port_info *of_get_uart_port_info(struct device *dev)
}
static int serial_omap_probe_rs485(struct uart_omap_port *up,
- struct device_node *np)
+ struct device *dev)
{
struct serial_rs485 *rs485conf = &up->port.rs485;
+ struct device_node *np = dev->of_node;
+ enum gpiod_flags gflags;
int ret;
rs485conf->flags = 0;
- up->rts_gpio = -EINVAL;
+ up->rts_gpiod = NULL;
if (!np)
return 0;
- uart_get_rs485_mode(up->dev, rs485conf);
+ ret = uart_get_rs485_mode(&up->port);
+ if (ret)
+ return ret;
if (of_property_read_bool(np, "rs485-rts-active-high")) {
rs485conf->flags |= SER_RS485_RTS_ON_SEND;
@@ -1618,19 +1621,20 @@ static int serial_omap_probe_rs485(struct uart_omap_port *up,
}
/* check for tx enable gpio */
- up->rts_gpio = of_get_named_gpio(np, "rts-gpio", 0);
- if (gpio_is_valid(up->rts_gpio)) {
- ret = devm_gpio_request(up->dev, up->rts_gpio, "omap-serial");
- if (ret < 0)
- return ret;
- ret = rs485conf->flags & SER_RS485_RTS_AFTER_SEND ? 1 : 0;
- ret = gpio_direction_output(up->rts_gpio, ret);
- if (ret < 0)
+ gflags = rs485conf->flags & SER_RS485_RTS_AFTER_SEND ?
+ GPIOD_OUT_HIGH : GPIOD_OUT_LOW;
+ up->rts_gpiod = devm_gpiod_get_optional(dev, "rts", gflags);
+ if (IS_ERR(up->rts_gpiod)) {
+ ret = PTR_ERR(up->rts_gpiod);
+ if (ret == -EPROBE_DEFER)
return ret;
- } else if (up->rts_gpio == -EPROBE_DEFER) {
- return -EPROBE_DEFER;
+ /*
+ * FIXME: the code historically ignored any other error than
+ * -EPROBE_DEFER and just went on without GPIO.
+ */
+ up->rts_gpiod = NULL;
} else {
- up->rts_gpio = -EINVAL;
+ gpiod_set_consumer_name(up->rts_gpiod, "omap-serial");
}
return 0;
@@ -1703,7 +1707,7 @@ static int serial_omap_probe(struct platform_device *pdev)
dev_info(up->port.dev, "no wakeirq for uart%d\n",
up->port.line);
- ret = serial_omap_probe_rs485(up, pdev->dev.of_node);
+ ret = serial_omap_probe_rs485(up, &pdev->dev);
if (ret < 0)
goto err_rs485;