openwrtv3/target/linux/brcm2708/patches-4.4/0025-bcm2835-Add-support-for-uart1.patch
Felix Fietkau 4224b52c3a brcm2708: add linux 4.4 support
- random-bcm2708 and spi-bcm2708 have been removed.
- sound-soc-bcm2708-i2s has been upstreamed as sound-soc-bcm2835-i2s.

Let's keep linux 4.1 for a while, since linux 4.4 appears to have some issues
with multicast traffic on RPi ethernet:
https://gist.github.com/Noltari/5b1cfdecce5ed4bc08fd

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

SVN-Revision: 48266
2016-01-17 10:42:23 +00:00

57 lines
1.6 KiB
Diff

From 34cb40cb97cd3080d3d0f314b2b063939b90c069 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
Date: Sat, 15 Aug 2015 20:50:02 +0200
Subject: [PATCH 025/127] bcm2835: Add support for uart1
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This is a hack until a proper solution is agreed upon.
Martin Sperl is doing some work in this area.
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
---
arch/arm/mach-bcm/board_bcm2835.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
--- a/arch/arm/mach-bcm/board_bcm2835.c
+++ b/arch/arm/mach-bcm/board_bcm2835.c
@@ -22,6 +22,29 @@
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
+/* Use this hack until a proper solution is agreed upon */
+static void __init bcm2835_init_uart1(void)
+{
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "brcm,bcm2835-aux-uart");
+ if (of_device_is_available(np)) {
+ np = of_find_compatible_node(NULL, NULL,
+ "bcrm,bcm2835-aux-enable");
+ if (np) {
+ void __iomem *base = of_iomap(np, 0);
+
+ if (!base) {
+ pr_err("bcm2835: Failed enabling Mini UART\n");
+ return;
+ }
+
+ writel(1, base);
+ pr_info("bcm2835: Mini UART enabled\n");
+ }
+ }
+}
+
static void __init bcm2835_init(void)
{
struct device_node *np = of_find_node_by_path("/system");
@@ -42,6 +65,8 @@ static void __init bcm2835_init(void)
system_rev = val;
if (!of_property_read_u64(np, "linux,serial", &val64))
system_serial_low = val64;
+
+ bcm2835_init_uart1();
}
static const char * const bcm2835_compat[] = {