011f2c26f1
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
57 lines
1.6 KiB
Diff
57 lines
1.6 KiB
Diff
From 1f2bc712a966060a4e73d6e0742e7417877ac8ff Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
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Date: Sat, 15 Aug 2015 20:50:02 +0200
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Subject: [PATCH] bcm2835: Add support for uart1
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This is a hack until a proper solution is agreed upon.
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Martin Sperl is doing some work in this area.
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Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
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---
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arch/arm/mach-bcm/board_bcm2835.c | 25 +++++++++++++++++++++++++
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1 file changed, 25 insertions(+)
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--- a/arch/arm/mach-bcm/board_bcm2835.c
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+++ b/arch/arm/mach-bcm/board_bcm2835.c
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@@ -22,6 +22,29 @@
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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+/* Use this hack until a proper solution is agreed upon */
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+static void __init bcm2835_init_uart1(void)
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+{
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+ struct device_node *np;
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+
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+ np = of_find_compatible_node(NULL, NULL, "brcm,bcm2835-aux-uart");
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+ if (of_device_is_available(np)) {
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+ np = of_find_compatible_node(NULL, NULL,
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+ "bcrm,bcm2835-aux-enable");
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+ if (np) {
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+ void __iomem *base = of_iomap(np, 0);
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+
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+ if (!base) {
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+ pr_err("bcm2835: Failed enabling Mini UART\n");
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+ return;
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+ }
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+
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+ writel(1, base);
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+ pr_info("bcm2835: Mini UART enabled\n");
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+ }
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+ }
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+}
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+
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static void __init bcm2835_init(void)
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{
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struct device_node *np = of_find_node_by_path("/system");
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@@ -42,6 +65,8 @@ static void __init bcm2835_init(void)
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system_rev = val;
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if (!of_property_read_u64(np, "linux,serial", &val64))
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system_serial_low = val64;
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+
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+ bcm2835_init_uart1();
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}
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static const char * const bcm2835_compat[] = {
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