From 69bd1a4f19a41c6ba680e8440165634f6278895f Mon Sep 17 00:00:00 2001 From: Akash Asthana Date: Mon, 6 Jan 2020 20:15:05 +0530 Subject: tty: serial: qcom_geni_serial: Move loopback support to TIOCM_LOOP 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 Reviewed-by: Stephen Boyd Link: https://lore.kernel.org/r/1578321905-25843-3-git-send-email-akashast@codeaurora.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/qcom_geni_serial.c | 36 +++++++++-------------------------- 1 file changed, 9 insertions(+), 27 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 1e164839662c..191abb18fc2a 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) -- cgit v1.2.3