target/linux/brcm2708/patches-4.4/0025-bcm2835-Add-support-for-uart1.patch

   1 From 0b7e0b20da67546344f9fc8e57699adfe61b8953 Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
   3 Date: Sat, 15 Aug 2015 20:50:02 +0200
   4 Subject: [PATCH 025/381] bcm2835: Add support for uart1
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 This is a hack until a proper solution is agreed upon.
  10 Martin Sperl is doing some work in this area.
  11
  12 Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
  13 ---
  14  arch/arm/mach-bcm/board_bcm2835.c | 25 +++++++++++++++++++++++++
  15  1 file changed, 25 insertions(+)
  16
  17 --- a/arch/arm/mach-bcm/board_bcm2835.c
  18 +++ b/arch/arm/mach-bcm/board_bcm2835.c
  19 @@ -22,6 +22,29 @@
  20  #include <asm/mach/arch.h>
  21  #include <asm/mach/map.h>
  22
  23 +/* Use this hack until a proper solution is agreed upon */
  24 +static void __init bcm2835_init_uart1(void)
  25 +{
  26 +       struct device_node *np;
  27 +
  28 +       np = of_find_compatible_node(NULL, NULL, "brcm,bcm2835-aux-uart");
  29 +       if (of_device_is_available(np)) {
  30 +               np = of_find_compatible_node(NULL, NULL,
  31 +                                            "bcrm,bcm2835-aux-enable");
  32 +               if (np) {
  33 +                       void __iomem *base = of_iomap(np, 0);
  34 +
  35 +                       if (!base) {
  36 +                               pr_err("bcm2835: Failed enabling Mini UART\n");
  37 +                               return;
  38 +                       }
  39 +
  40 +                       writel(1, base);
  41 +                       pr_info("bcm2835: Mini UART enabled\n");
  42 +               }
  43 +       }
  44 +}
  45 +
  46  static void __init bcm2835_init(void)
  47  {
  48         struct device_node *np = of_find_node_by_path("/system");
  49 @@ -42,6 +65,8 @@ static void __init bcm2835_init(void)
  50                 system_rev = val;
  51         if (!of_property_read_u64(np, "linux,serial", &val64))
  52                 system_serial_low = val64;
  53 +
  54 +       bcm2835_init_uart1();
  55  }
  56
  57  static const char * const bcm2835_compat[] = {