[PATCH v5 3/3] tty: serial: qcom_geni_serial: Remove sysfs file

From: Akash Asthana <akashast@codeaurora.org>
To: gregkh@linuxfoundation.org
Cc: linux-arm-msm@vger.kernel.org, linux-serial@vger.kernel.org,
	mgautam@codeaurora.org, swboyd@chromium.org,
	msavaliy@codeaurora.org, Akash Asthana <akashast@codeaurora.org>
Subject: [PATCH v5 3/3] tty: serial: qcom_geni_serial: Remove sysfs file
Date: Wed, 13 Nov 2019 16:19:21 +0530	[thread overview]
Message-ID: <1573642161-14189-1-git-send-email-akashast@codeaurora.org> (raw)

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@codeaurora.org>
---
Changes in V5:
 - As per Greg's and Stephen's comment on v4 patch, removed loopback sysfs
   file related code.

 drivers/tty/serial/qcom_geni_serial.c | 30 ++++--------------------------
 1 file changed, 4 insertions(+), 26 deletions(-)

diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 56dad67..52f5ea2 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -165,30 +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,
@@ -238,10 +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 = MAX_LOOPBACK_CFG;
+
 	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);
@@ -1311,8 +1291,6 @@ 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)
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project

