From 485ed8f7d5c54c1c4a47c8821d0a241782333011 Mon Sep 17 00:00:00 2001
From: Yangtao Li <frank.li@vivo.com>
Date: Wed, 12 Jul 2023 14:28:50 +0800
Subject: [PATCH] serial: mvebu-uart: Use
 devm_platform_get_and_ioremap_resource()

References: bsc#1214683 (PREEMPT_RT prerequisite backports)
Patch-mainline: v6.6-rc1
Git-commit: ffd793eba4e75628460bcab3d3bb72ee39d7b49a

Convert platform_get_resource(), devm_ioremap_resource() to a single
call to devm_platform_get_and_ioremap_resource(), as this is exactly
what this function does.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
Link: https://lore.kernel.org/r/20230712062853.11007-12-frank.li@vivo.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Mel Gorman <mgorman@suse.de>
---
 drivers/tty/serial/mvebu-uart.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/tty/serial/mvebu-uart.c b/drivers/tty/serial/mvebu-uart.c
index 31f739c7a08b..ea924e9b913b 100644
--- a/drivers/tty/serial/mvebu-uart.c
+++ b/drivers/tty/serial/mvebu-uart.c
@@ -876,18 +876,13 @@ static int uart_num_counter;
 
 static int mvebu_uart_probe(struct platform_device *pdev)
 {
-	struct resource *reg = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	const struct of_device_id *match = of_match_device(mvebu_uart_of_match,
 							   &pdev->dev);
 	struct uart_port *port;
 	struct mvebu_uart *mvuart;
+	struct resource *reg;
 	int id, irq;
 
-	if (!reg) {
-		dev_err(&pdev->dev, "no registers defined\n");
-		return -EINVAL;
-	}
-
 	/* Assume that all UART ports have a DT alias or none has */
 	id = of_alias_get_id(pdev->dev.of_node, "serial");
 	if (!pdev->dev.of_node || id < 0)
@@ -922,11 +917,11 @@ static int mvebu_uart_probe(struct platform_device *pdev)
 	 */
 	port->irq        = 0;
 	port->irqflags   = 0;
-	port->mapbase    = reg->start;
 
-	port->membase = devm_ioremap_resource(&pdev->dev, reg);
+	port->membase = devm_platform_get_and_ioremap_resource(pdev, 0, &reg);
 	if (IS_ERR(port->membase))
 		return PTR_ERR(port->membase);
+	port->mapbase    = reg->start;
 
 	mvuart = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_uart),
 			      GFP_KERNEL);