From f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 01:04:47 +0000
Subject: [PATCH] add driver 5G
---
kernel/arch/arm/mach-lpc32xx/serial.c | 44 ++++++++++++++++++++++++++++++++------------
1 files changed, 32 insertions(+), 12 deletions(-)
diff --git a/kernel/arch/arm/mach-lpc32xx/serial.c b/kernel/arch/arm/mach-lpc32xx/serial.c
index 1931229..3e765c4 100644
--- a/kernel/arch/arm/mach-lpc32xx/serial.c
+++ b/kernel/arch/arm/mach-lpc32xx/serial.c
@@ -1,19 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* arch/arm/mach-lpc32xx/serial.c
*
* Author: Kevin Wells <kevin.wells@nxp.com>
*
* Copyright (C) 2010 NXP Semiconductors
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
*/
#include <linux/kernel.h>
@@ -25,8 +16,7 @@
#include <linux/clk.h>
#include <linux/io.h>
-#include <mach/hardware.h>
-#include <mach/platform.h>
+#include "lpc32xx.h"
#include "common.h"
#define LPC32XX_SUART_FIFO_SIZE 64
@@ -69,6 +59,36 @@
},
};
+/* LPC3250 Errata HSUART.1: Hang workaround via loopback mode on inactivity */
+void lpc32xx_loopback_set(resource_size_t mapbase, int state)
+{
+ int bit;
+ u32 tmp;
+
+ switch (mapbase) {
+ case LPC32XX_HS_UART1_BASE:
+ bit = 0;
+ break;
+ case LPC32XX_HS_UART2_BASE:
+ bit = 1;
+ break;
+ case LPC32XX_HS_UART7_BASE:
+ bit = 6;
+ break;
+ default:
+ WARN(1, "lpc32xx_hs: Warning: Unknown port at %08x\n", mapbase);
+ return;
+ }
+
+ tmp = readl(LPC32XX_UARTCTL_CLOOP);
+ if (state)
+ tmp |= (1 << bit);
+ else
+ tmp &= ~(1 << bit);
+ writel(tmp, LPC32XX_UARTCTL_CLOOP);
+}
+EXPORT_SYMBOL_GPL(lpc32xx_loopback_set);
+
void __init lpc32xx_serial_init(void)
{
u32 tmp, clkmodes = 0;
--
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