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0025-bcm2835-Add-support-for-uart1.patch

0025-bcm2835-Add-support-for-uart1.patch 1.6 KB
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  1. From 0b7e0b20da67546344f9fc8e57699adfe61b8953 Mon Sep 17 00:00:00 2001
    2. 

  2. From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
    3. 

  3. Date: Sat, 15 Aug 2015 20:50:02 +0200
    4. 

  4. Subject: [PATCH 025/381] bcm2835: Add support for uart1
    5. 

  5. MIME-Version: 1.0
    6. 

  6. Content-Type: text/plain; charset=UTF-8
    7. 

  7. Content-Transfer-Encoding: 8bit
    8. 

  8. 

  9. This is a hack until a proper solution is agreed upon.
    10. 

  10. Martin Sperl is doing some work in this area.
    11. 

  11. 

  12. Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
    13. 

  13. ---
    14. 

  14.  arch/arm/mach-bcm/board_bcm2835.c | 25 +++++++++++++++++++++++++
    15. 

  15.  1 file changed, 25 insertions(+)
    16. 

  16. 

  17. --- a/arch/arm/mach-bcm/board_bcm2835.c
    18. 

  18. +++ b/arch/arm/mach-bcm/board_bcm2835.c
    19. 

  19. @@ -22,6 +22,29 @@
    20. 

  20.  #include <asm/mach/arch.h>
    21. 

  21.  #include <asm/mach/map.h>
    22. 

  22.  
    23. 

  23. +/* Use this hack until a proper solution is agreed upon */
    24. 

  24. +static void __init bcm2835_init_uart1(void)
    25. 

  25. +{
    26. 

  26. +	struct device_node *np;
    27. 

  27. +
    28. 

  28. +	np = of_find_compatible_node(NULL, NULL, "brcm,bcm2835-aux-uart");
    29. 

  29. +	if (of_device_is_available(np)) {
    30. 

  30. +		np = of_find_compatible_node(NULL, NULL,
    31. 

  31. +					     "bcrm,bcm2835-aux-enable");
    32. 

  32. +		if (np) {
    33. 

  33. +			void __iomem *base = of_iomap(np, 0);
    34. 

  34. +
    35. 

  35. +			if (!base) {
    36. 

  36. +				pr_err("bcm2835: Failed enabling Mini UART\n");
    37. 

  37. +				return;
    38. 

  38. +			}
    39. 

  39. +
    40. 

  40. +			writel(1, base);
    41. 

  41. +			pr_info("bcm2835: Mini UART enabled\n");
    42. 

  42. +		}
    43. 

  43. +	}
    44. 

  44. +}
    45. 

  45. +
    46. 

  46.  static void __init bcm2835_init(void)
    47. 

  47.  {
    48. 

  48.  	struct device_node *np = of_find_node_by_path("/system");
    49. 

  49. @@ -42,6 +65,8 @@ static void __init bcm2835_init(void)
    50. 

  50.  		system_rev = val;
    51. 

  51.  	if (!of_property_read_u64(np, "linux,serial", &val64))
    52. 

  52.  		system_serial_low = val64;
    53. 

  53. +
    54. 

  54. +	bcm2835_init_uart1();
    55. 

  55.  }
    56. 

  56.  
    57. 

  57.  static const char * const bcm2835_compat[] = {
    58.