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Mon, 18 Dec 2023 03:44:29 -0600 From: Manikanta Guntupalli To: , , , , , , , , , , CC: , , , , Manikanta Guntupalli Subject: [PATCH V7 2/3] tty: serial: uartps: Relocate cdns_uart_tx_empty to facilitate rs485 Date: Mon, 18 Dec 2023 15:14:14 +0530 Message-ID: <20231218094415.2503672-3-manikanta.guntupalli@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231218094415.2503672-1-manikanta.guntupalli@amd.com> References: <20231218094415.2503672-1-manikanta.guntupalli@amd.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000EE3F:EE_|SN7PR12MB7836:EE_ X-MS-Office365-Filtering-Correlation-Id: 044c168e-74c0-43f9-e28a-08dbffadf142 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17; 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Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EE3F.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB7836 Relocate cdns_uart_tx_empty function to avoid prototype statement in rs485 changes. Signed-off-by: Manikanta Guntupalli --- Changes since V4: This patch introduced in V4. Changes for V5: None. Changes for V6: None. Changes for V7: None. --- 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 920762d7b4a4..aafcc2179e0e 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