target/linux/ep93xx/patches-2.6.38/001-ep93xx_cpuinfo.patch

   1 This patch puts the EP93xx chip revision and unique ID into /proc/cpuinfo.
   2 This is necessary to be able to set a unique MAC address for DHCP purposes
   3 by adding a line to /etc/network/interfaces:
   4
   5 # Generate a unique locally-assigned MAC address from the CPU serial number
   6 pre-up ifconfig eth0 hw ether `sed -n 's/^Serial.* 000000/02/p' /proc/cpuinfo`
   7
   8 It uses the chip revision reading code in the ep93xx-chip-revision patch.
   9
  10 Really, this is wrong, since /proc/cpuinfo should report the revision and
  11 serial number of the ARM920T processor, while these are the rev and serial
  12 of the EP93xx SoC. In a future kernel (>2.6.34) there may be a new file
  13 /proc/socinfo for this information.
  14
  15         -martinwguy 14 May 2010
  16
  17 --- a/arch/arm/kernel/setup.c
  18 +++ b/arch/arm/kernel/setup.c
  19 @@ -48,6 +48,12 @@
  20  #include <asm/traps.h>
  21  #include <asm/unwind.h>
  22
  23 +#if defined(CONFIG_ARCH_EP93XX)
  24 +#include <mach/io.h>
  25 +#include <mach/ep93xx-regs.h>
  26 +#include <mach/platform.h>
  27 +#endif
  28 +
  29  #if defined(CONFIG_DEPRECATED_PARAM_STRUCT)
  30  #include "compat.h"
  31  #endif
  32 @@ -989,9 +995,16 @@ static int c_show(struct seq_file *m, vo
  33         seq_puts(m, "\n");
  34
  35         seq_printf(m, "Hardware\t: %s\n", machine_name);
  36 +#if defined(CONFIG_ARCH_EP93XX)
  37 +       seq_printf(m, "Revision\t: %04x\n",
  38 +            ep93xx_chip_revision());
  39 +       seq_printf(m, "Serial\t\t: %016x\n",
  40 +            *((unsigned int *)EP93XX_SECURITY_UNIQID));
  41 +#else
  42         seq_printf(m, "Revision\t: %04x\n", system_rev);
  43         seq_printf(m, "Serial\t\t: %08x%08x\n",
  44                    system_serial_high, system_serial_low);
  45 +#endif
  46
  47         return 0;
  48  }
  49 --- a/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h
  50 +++ b/arch/arm/mach-ep93xx/include/mach/ep93xx-regs.h
  51 @@ -97,6 +97,8 @@
  52  #define EP93XX_I2S_BASE                        EP93XX_APB_IOMEM(0x00020000)
  53
  54  #define EP93XX_SECURITY_BASE           EP93XX_APB_IOMEM(0x00030000)
  55 +#define EP93XX_SECURITY_REG(x)         (EP93XX_SECURITY_BASE + (x))
  56 +#define EP93XX_SECURITY_UNIQID         EP93XX_SECURITY_REG(0x2440)
  57
  58  #define EP93XX_GPIO_BASE               EP93XX_APB_IOMEM(0x00040000)
  59  #define EP93XX_GPIO_REG(x)             (EP93XX_GPIO_BASE + (x))