Remove code from the driver that create and maintain loopback sysfs node.
Instead use the ioctl TIOCMSET with TIOCM_LOOP argument to set HW to
loopback mode.
Signed-off-by: Akash Asthana <akashast@xxxxxxxxxxxxxx>
Reviewed-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
---
drivers/tty/serial/qcom_geni_serial.c | 36 +++++++++--------------------------
1 file changed, 9 insertions(+), 27 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 1e16483..191abb1 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -89,7 +89,11 @@
#define DEF_TX_WM 2
#define DEF_FIFO_WIDTH_BITS 32
#define UART_RX_WM 2
-#define MAX_LOOPBACK_CFG 3
+
+/* SE_UART_LOOPBACK_CFG */
+#define RX_TX_SORTED BIT(0)
+#define CTS_RTS_SORTED BIT(1)
+#define RX_TX_CTS_RTS_SORTED (RX_TX_SORTED | CTS_RTS_SORTED)
#ifdef CONFIG_CONSOLE_POLL
#define CONSOLE_RX_BYTES_PW 1
@@ -161,30 +165,6 @@ static struct qcom_geni_serial_port qcom_geni_uart_ports[GENI_UART_PORTS] = {
},
};
-static ssize_t loopback_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct qcom_geni_serial_port *port = dev_get_drvdata(dev);
-
- return snprintf(buf, sizeof(u32), "%d\n", port->loopback);
-}
-
-static ssize_t loopback_store(struct device *dev,
- struct device_attribute *attr, const char *buf,
- size_t size)
-{
- struct qcom_geni_serial_port *port = dev_get_drvdata(dev);
- u32 loopback;
-
- if (kstrtoint(buf, 0, &loopback) || loopback > MAX_LOOPBACK_CFG) {
- dev_err(dev, "Invalid input\n");
- return -EINVAL;
- }
- port->loopback = loopback;
- return size;
-}
-static DEVICE_ATTR_RW(loopback);
-
static struct qcom_geni_serial_port qcom_geni_console_port = {
.uport = {
.iotype = UPIO_MEM,
@@ -234,10 +214,14 @@ static void qcom_geni_serial_set_mctrl(struct uart_port *uport,
unsigned int mctrl)
{
u32 uart_manual_rfr = 0;
+ struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
if (uart_console(uport))
return;
+ if (mctrl & TIOCM_LOOP)
+ port->loopback = RX_TX_CTS_RTS_SORTED;
+
if (!(mctrl & TIOCM_RTS))
uart_manual_rfr = UART_MANUAL_RFR_EN | UART_RFR_NOT_READY;
writel(uart_manual_rfr, uport->membase + SE_UART_MANUAL_RFR);
@@ -1308,8 +1292,6 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
uport->private_data = drv;
platform_set_drvdata(pdev, port);
port->handle_rx = console ? handle_rx_console : handle_rx_uart;
- if (!console)
- device_create_file(uport->dev, &dev_attr_loopback);
ret = uart_add_one_port(drv, uport);
if (ret)
--
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