linux-kernel - [PATCH V4 2/3] tty: serial: uartps: Relocate cdns_uart_tx

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Message-ID: <20231211091159.58564-3-manikanta.guntupalli@amd.com>
Date:   Mon, 11 Dec 2023 14:41:58 +0530
From:   Manikanta Guntupalli <manikanta.guntupalli@....com>
To:     <git@....com>, <michal.simek@....com>,
        <gregkh@...uxfoundation.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <linux-serial@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <jirislaby@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>
CC:     <radhey.shyam.pandey@....com>, <srinivas.goud@....com>,
        <shubhrajyoti.datta@....com>, <manion05gk@...il.com>,
        Manikanta Guntupalli <manikanta.guntupalli@....com>
Subject: [PATCH V4 2/3] tty: serial: uartps: Relocate cdns_uart_tx_empty to facilitate rs485

Relocate cdns_uart_tx_empty function to avoid prototype statement in
rs485 changes.

Signed-off-by: Manikanta Guntupalli <manikanta.guntupalli@....com>
---
Changes since V4:
This patch introduced in V4.
---
 drivers/tty/serial/xilinx_uartps.c | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index 66a45a634158..f7fc2de8778d 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -305,6 +305,21 @@ static void cdns_uart_handle_rx(void *dev_id, unsigned int isrstatus)
 	tty_flip_buffer_push(&port->state->port);
 }
 
+/**
+ * cdns_uart_tx_empty -  Check whether TX is empty
+ * @port: Handle to the uart port structure
+ *
+ * Return: TIOCSER_TEMT on success, 0 otherwise
+ */
+static unsigned int cdns_uart_tx_empty(struct uart_port *port)
+{
+	unsigned int status;
+
+	status = readl(port->membase + CDNS_UART_SR);
+	status &= (CDNS_UART_SR_TXEMPTY | CDNS_UART_SR_TACTIVE);
+	return (status == CDNS_UART_SR_TXEMPTY) ? TIOCSER_TEMT : 0;
+}
+
 /**
  * cdns_uart_handle_tx - Handle the bytes to be Txed.
  * @dev_id: Id of the UART port
@@ -626,21 +641,6 @@ static void cdns_uart_stop_rx(struct uart_port *port)
 	writel(regval, port->membase + CDNS_UART_CR);
 }
 
-/**
- * cdns_uart_tx_empty -  Check whether TX is empty
- * @port: Handle to the uart port structure
- *
- * Return: TIOCSER_TEMT on success, 0 otherwise
- */
-static unsigned int cdns_uart_tx_empty(struct uart_port *port)
-{
-	unsigned int status;
-
-	status = readl(port->membase + CDNS_UART_SR) &
-		       (CDNS_UART_SR_TXEMPTY | CDNS_UART_SR_TACTIVE);
-	return (status == CDNS_UART_SR_TXEMPTY) ? TIOCSER_TEMT : 0;
-}
-
 /**
  * cdns_uart_break_ctl - Based on the input ctl we have to start or stop
  *			transmitting char breaks
-- 
2.25.1