target/linux/rb532/patches-2.6.27/022-rb532_uart_autodetect.patch

   1 Auto-detection works just fine, so use it instead of specifying the type
   2 manually. Also define a platform device for the uart, as suggested by
   3 David Daney.
   4
   5 Signed-off-by: Phil Sutter <n0-1@freewrt.org>
   6 ---
   7  arch/mips/rb532/devices.c |   26 ++++++++++++++++++++++++++
   8  arch/mips/rb532/serial.c  |    2 +-
   9  2 files changed, 27 insertions(+), 1 deletions(-)
  10
  11 diff --git a/arch/mips/rb532/devices.c b/arch/mips/rb532/devices.c
  12 index c1c2918..9b6b744 100644
  13 --- a/arch/mips/rb532/devices.c
  14 +++ b/arch/mips/rb532/devices.c
  15 @@ -24,6 +24,7 @@
  16  #include <linux/mtd/partitions.h>
  17  #include <linux/gpio_keys.h>
  18  #include <linux/input.h>
  19 +#include <linux/serial_8250.h>
  20
  21  #include <asm/bootinfo.h>
  22
  23 @@ -39,6 +40,8 @@
  24  #define ETH0_RX_DMA_ADDR  (DMA0_BASE_ADDR + 0 * DMA_CHAN_OFFSET)
  25  #define ETH0_TX_DMA_ADDR  (DMA0_BASE_ADDR + 1 * DMA_CHAN_OFFSET)
  26
  27 +extern unsigned int idt_cpu_freq;
  28 +
  29  static struct resource korina_dev0_res[] = {
  30         {
  31                 .name = "korina_regs",
  32 @@ -214,12 +217,32 @@ static struct platform_device rb532_wdt = {
  33         .num_resources  = ARRAY_SIZE(rb532_wdt_res),
  34  };
  35
  36 +static struct plat_serial8250_port rb532_uart_res[] = {
  37 +       {
  38 +               .membase        = (char *)KSEG1ADDR(REGBASE + UART0BASE),
  39 +               .irq            = UART0_IRQ,
  40 +               .regshift       = 2,
  41 +               .iotype         = UPIO_MEM,
  42 +               .flags          = UPF_BOOT_AUTOCONF,
  43 +       },
  44 +       {
  45 +               .flags          = 0,
  46 +       }
  47 +};
  48 +
  49 +static struct platform_device rb532_uart = {
  50 +       .name              = "serial8250",
  51 +       .id                = PLAT8250_DEV_PLATFORM,
  52 +       .dev.platform_data = &rb532_uart_res,
  53 +};
  54 +
  55  static struct platform_device *rb532_devs[] = {
  56         &korina_dev0,
  57         &nand_slot0,
  58         &cf_slot0,
  59         &rb532_led,
  60         &rb532_button,
  61 +       &rb532_uart,
  62         &rb532_wdt
  63  };
  64
  65 @@ -294,6 +317,9 @@ static int __init plat_setup_devices(void)
  66         /* Initialise the NAND device */
  67         rb532_nand_setup();
  68
  69 +       /* set the uart clock to the current cpu frequency */
  70 +       rb532_uart_res[0].uartclk = idt_cpu_freq;
  71 +
  72         return platform_add_devices(rb532_devs, ARRAY_SIZE(rb532_devs));
  73  }
  74
  75 diff --git a/arch/mips/rb532/serial.c b/arch/mips/rb532/serial.c
  76 index 3e0d7ec..00ed19f 100644
  77 --- a/arch/mips/rb532/serial.c
  78 +++ b/arch/mips/rb532/serial.c
  79 @@ -36,7 +36,7 @@
  80  extern unsigned int idt_cpu_freq;
  81
  82  static struct uart_port rb532_uart = {
  83 -       .type = PORT_16550A,
  84 +       .flags = UPF_BOOT_AUTOCONF,
  85         .line = 0,
  86         .irq = UART0_IRQ,
  87         .iotype = UPIO_MEM,
  88 --
  89 1.5.6.4
  90
  91