brcm2708: add linux 4.4 support

[openwrt/staging/lynxis/omap.git] / target / linux / brcm2708 / patches-4.4 / 0025-bcm2835-Add-support-for-uart1.patch

diff --git a/target/linux/brcm2708/patches-4.4/0025-bcm2835-Add-support-for-uart1.patch b/target/linux/brcm2708/patches-4.4/0025-bcm2835-Add-support-for-uart1.patch
new file mode 100644 (file)
index 0000000..cd7f242
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0025-bcm2835-Add-support-for-uart1.patch
@@ -0,0 +1,57 @@
+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[] = {