target/linux/s3c24xx/patches-2.6.24/1103-add-gta02-pcb-revision-detect.patch.patch

   1 From b8d251412bc4c420f33920c2d9492076fc7b9624 Mon Sep 17 00:00:00 2001
   2 From: Andy Green <andy@openmoko.com>
   3 Date: Sun, 13 Apr 2008 07:25:52 +0100
   4 Subject: [PATCH] add-gta02-pcb-revision-detect.patch
   5
   6 Add function
   7
   8 int gta02_get_pcb_revision(void)
   9
  10 which returns state of GTA02 PCB revision pins.  It is also called
  11 and logged during boot with KERN_INFO.  The results look like:
  12
  13 b9    b8        b2    b1    b0
  14  GPD4  GPD3     GPD0  GPC15 GPC13
  15
  16  GTA02 A5 and before:  0x000
  17  GTA02 A6           :  0x001
  18
  19 Signed-off-by: Andy Green <andy@openmoko.com>
  20 ---
  21  arch/arm/mach-s3c2440/mach-gta02.c   |   55 +++++++++++++++++++++++++++++++++-
  22  include/asm-arm/arch-s3c2410/gta02.h |    9 +++++
  23  2 files changed, 63 insertions(+), 1 deletions(-)
  24
  25 diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
  26 index 99206ee..a2a63fe 100644
  27 --- a/arch/arm/mach-s3c2440/mach-gta02.c
  28 +++ b/arch/arm/mach-s3c2440/mach-gta02.c
  29 @@ -320,6 +320,59 @@ FIQ_HANDLER_ENTRY(256, 512)
  30  FIQ_HANDLER_END()
  31
  32
  33 +/**
  34 + * returns PCB revision information in b9,b8 and b2,b1,b0
  35 + * Pre-GTA02 A6 returns 0x000
  36 + *     GTA02 A6 returns 0x101
  37 + *     ...
  38 + */
  39 +
  40 +int gta02_get_pcb_revision(void)
  41 +{
  42 +       int n;
  43 +       int u = 0;
  44 +       static unsigned long pinlist[] = {
  45 +               GTA02_PCB_ID1_0,
  46 +               GTA02_PCB_ID1_1,
  47 +               GTA02_PCB_ID1_2,
  48 +               GTA02_PCB_ID2_0,
  49 +               GTA02_PCB_ID2_1,
  50 +       };
  51 +       static int pin_offset[] = {
  52 +               0, 1, 2, 8, 9
  53 +       };
  54 +
  55 +       for (n = 0 ; n < ARRAY_SIZE(pinlist); n++) {
  56 +               /*
  57 +                * set the PCB version GPIO to be pulled-down input
  58 +                * force low briefly first
  59 +                */
  60 +               s3c2410_gpio_cfgpin(pinlist[n], S3C2410_GPIO_OUTPUT);
  61 +               s3c2410_gpio_setpin(pinlist[n], 0);
  62 +               /* misnomer: it is a pullDOWN in 2442 */
  63 +               s3c2410_gpio_pullup(pinlist[n], 1);
  64 +               s3c2410_gpio_cfgpin(pinlist[n], S3C2410_GPIO_INPUT);
  65 +
  66 +               udelay(10);
  67 +
  68 +               if (s3c2410_gpio_getpin(pinlist[n]))
  69 +                       u |= 1 << pin_offset[n];
  70 +
  71 +               /*
  72 +               * when not being interrogated, all of the revision GPIO
  73 +               * are set to output HIGH without pulldown so no current flows
  74 +               * if they are NC or pulled up.
  75 +               */
  76 +               s3c2410_gpio_setpin(pinlist[n], 1);
  77 +               s3c2410_gpio_cfgpin(pinlist[n], S3C2410_GPIO_OUTPUT);
  78 +               /* misnomer: it is a pullDOWN in 2442 */
  79 +               s3c2410_gpio_pullup(pinlist[n], 0);
  80 +       }
  81 +
  82 +       return u;
  83 +}
  84 +
  85 +
  86  static struct map_desc gta02_iodesc[] __initdata = {
  87         {
  88                 .virtual        = 0xe0000000,
  89 @@ -911,7 +964,7 @@ void gat02_lis302dl_suspend_io(struct lis302dl_info *lis, int resume)
  90         s3c2410_gpio_pullup(pdata->pin_miso, 0);
  91  }
  92
  93 -const struct lis302dl_platform_data lis302_pdata[] = {
  94 +struct lis302dl_platform_data lis302_pdata[] = {
  95         {
  96                 .name           = "lis302-1 (top)",
  97                 .pin_chip_select= S3C2410_GPD12,
  98 diff --git a/include/asm-arm/arch-s3c2410/gta02.h b/include/asm-arm/arch-s3c2410/gta02.h
  99 index f686a7a..791ea4f 100644
 100 --- a/include/asm-arm/arch-s3c2410/gta02.h
 101 +++ b/include/asm-arm/arch-s3c2410/gta02.h
 102 @@ -97,4 +97,13 @@
 103  #define GTA02v3_IRQ_nUSB_FLT   IRQ_EINT18      /* v3 + v4 only */
 104  #define GTA02v3_IRQ_nGSM_OC    IRQ_EINT19      /* v3 + v4 only */
 105
 106 +/* returns 00 000 on GTA02 A5 and earlier, A6 returns 01 001 */
 107 +#define GTA02_PCB_ID1_0                S3C2410_GPC13
 108 +#define GTA02_PCB_ID1_1                S3C2410_GPC15
 109 +#define GTA02_PCB_ID1_2                S3C2410_GPD0
 110 +#define GTA02_PCB_ID2_0                S3C2410_GPD3
 111 +#define GTA02_PCB_ID2_1                S3C2410_GPD4
 112 +
 113 +int gta02_get_pcb_revision(void);
 114 +
 115  #endif /* _GTA02_H */
 116 --
 117 1.5.6.5
 118