arch/arm/mach-pxa/eseries/e740_t7l66xb.c

   1 /* platform specific code to drive the T7L66XB chip on the e740. */
   2
   3 //#include <linux/module.h>
   4
   5 #include <linux/kernel.h>
   6 #include <linux/init.h>
   7 #include <linux/device.h>
   8 #include <linux/major.h>
   9 #include <linux/interrupt.h>
  10 #include <linux/device.h>
  11 #include <linux/delay.h>
  12
  13 #include <asm/mach-types.h>
  14 #include <asm/arch/hardware.h>
  15 #include <asm/arch/pxa-regs.h>
  16 #include <asm/arch/irq.h>
  17
  18 #include <asm/arch/eseries-irq.h>
  19 #include <asm/arch/eseries-gpio.h>
  20
  21 #include <soc/t7l66xb.h>
  22
  23 static struct resource e740_t7l66xb_resources[] = {
  24         [0] = {
  25                 .start  = PXA_CS4_PHYS,
  26                 .end    = PXA_CS4_PHYS + 0x1fffff,
  27                 .flags  = IORESOURCE_MEM,
  28         },
  29         [1] = {
  30                 .start  = IRQ_GPIO(GPIO_ESERIES_TMIO_IRQ),
  31                 .end    = IRQ_GPIO(GPIO_ESERIES_TMIO_IRQ),
  32                 .flags  = IORESOURCE_IRQ,
  33         },
  34
  35 };
  36
  37 //FIXME - who should really be setting up the clock? bootloader or kernel ?
  38 static void e740_t7l66xb_hwinit(void) {
  39
  40         GPCR(19) = GPIO_bit(19); // #SUSPEND low
  41         GPCR(7) = GPIO_bit(7); // #PCLR low (reset)
  42         pxa_gpio_mode(GPIO7_48MHz_MD);
  43         pxa_gpio_mode(GPIO12_32KHz_MD);
  44         mdelay(10);
  45         GPSR(19) = GPIO_bit(19); // #SUSPEND high
  46         mdelay(10);
  47         GPSR(7) = GPIO_bit(7); // #PCLR high
  48         mdelay(10);
  49 }
  50
  51 static void e740_t7l66xb_suspend(void) {
  52         GPCR(19) = GPIO_bit(19); // #SUSPEND low
  53         mdelay(10);
  54         GPCR(7) = GPIO_bit(7); // #PCLR low
  55
  56         /* kill clock */
  57 //      pxa_gpio_mode(GPIO7_48MHz_MD|GPIO_OUT);
  58 //      GPSR0 = GPIO_bit(GPIO7_48MHz);
  59 }
  60
  61 static void e740_t7l66xb_resume(void) {
  62         e740_t7l66xb_hwinit();
  63 }
  64
  65 static struct t7l66xb_platform_data e740_t7l66xb_info = {
  66         .hw_init                = &e740_t7l66xb_hwinit,
  67         .suspend                = &e740_t7l66xb_suspend,
  68         .resume                 = &e740_t7l66xb_resume,
  69 };
  70
  71 static struct platform_device e740_t7l66xb_device = {
  72         .name           = "t7l66xb",
  73         .id             = -1,
  74         .dev            = {
  75                 .driver_data = &e740_t7l66xb_info,
  76         },
  77         .num_resources = ARRAY_SIZE(e740_t7l66xb_resources),
  78         .resource      = e740_t7l66xb_resources,
  79 };
  80
  81 static int __init e740_t7l66xb_init(void)
  82 {
  83         if(!machine_is_e740())
  84                 return -ENODEV;
  85
  86         platform_device_register(&e740_t7l66xb_device);
  87         return 0;
  88 }
  89
  90 module_init(e740_t7l66xb_init);
  91
  92 MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
  93 MODULE_DESCRIPTION("e740 t7l66xb device support");
  94 MODULE_LICENSE("GPL");
  95
  96