1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
From a72021ae99021409319d552dad744572b20febfb 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 025/232] 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[] = {
|
