| 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 | @@ -54,6 +54,12 @@ |
| 20 | #include <asm/unwind.h> |
| 21 | #include <asm/memblock.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 | @@ -1087,9 +1093,16 @@ 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_PHYS_BASE EP93XX_APB_PHYS(0x00040000) |
| 59 | #define EP93XX_GPIO_BASE EP93XX_APB_IOMEM(0x00040000) |
| 60 | |
