target/linux/cns21xx/patches-2.6.37/203-cns21xx-add-spi-master-device.patch

   1 --- /dev/null
   2 +++ b/arch/arm/mach-cns21xx/dev-spi-master.c
   3 @@ -0,0 +1,83 @@
   4 +/*
   5 + *  Copyright (c) 2010 Gabor Juhos <juhosg@openwrt.org>
   6 + *
   7 + *  This file is free software; you can redistribute it and/or modify
   8 + *  it under the terms of the GNU General Public License, Version 2, as
   9 + *  published by the Free Software Foundation.
  10 + */
  11 +
  12 +#include <linux/kernel.h>
  13 +#include <linux/init.h>
  14 +#include <linux/spi/spi.h>
  15 +#include <linux/dma-mapping.h>
  16 +#include <linux/platform_device.h>
  17 +
  18 +#include <mach/hardware.h>
  19 +#include <mach/cns21xx.h>
  20 +#include <mach/cns21xx_misc.h>
  21 +#include <mach/cns21xx_powermgmt.h>
  22 +#include <mach/irqs.h>
  23 +
  24 +#include "common.h"
  25 +
  26 +static u64 spi_dmamask = DMA_BIT_MASK(32);
  27 +static struct resource cns21xx_spi_resources[] = {
  28 +       [0] = {
  29 +               .start  = CNS21XX_SPI_BASE,
  30 +               .end    = CNS21XX_SPI_BASE + SZ_4K - 1,
  31 +               .flags  = IORESOURCE_MEM,
  32 +       },
  33 +       [1] = {
  34 +               .start  = CNS21XX_IRQ_SPI,
  35 +               .end    = CNS21XX_IRQ_SPI,
  36 +               .flags  = IORESOURCE_IRQ,
  37 +       },
  38 +};
  39 +
  40 +static struct platform_device cns21xx_spi_master_device = {
  41 +       .name           = "cns21xx-spi",
  42 +       .id             = -1,
  43 +       .dev            = {
  44 +               .dma_mask               = &spi_dmamask,
  45 +               .coherent_dma_mask      = DMA_BIT_MASK(32),
  46 +       },
  47 +       .resource       = cns21xx_spi_resources,
  48 +       .num_resources  = ARRAY_SIZE(cns21xx_spi_resources),
  49 +};
  50 +
  51 +void __init cns21xx_register_spi_master(int id, struct spi_board_info *info,
  52 +                                       unsigned int n)
  53 +{
  54 +       unsigned int i;
  55 +
  56 +       /* Enable SPI pins */
  57 +       HAL_MISC_ENABLE_SPIDR_PINS();
  58 +       HAL_MISC_ENABLE_SPICLK_PINS();
  59 +       for (i = 0; i < n; i++) {
  60 +               switch (info[i].chip_select) {
  61 +               case 0:
  62 +                       HAL_MISC_ENABLE_SPICSN0_PINS();
  63 +                       break;
  64 +               case 1:
  65 +                       HAL_MISC_ENABLE_SPICSN1_PINS();
  66 +                       break;
  67 +               case 2:
  68 +                       HAL_MISC_ENABLE_SPICSN2_PINS();
  69 +                       break;
  70 +               case 3:
  71 +                       HAL_MISC_ENABLE_SPICSN3_PINS();
  72 +                       break;
  73 +               }
  74 +       }
  75 +
  76 +       /* Disable SPI serial flash access through 0x30000000 region */
  77 +       HAL_MISC_DISABLE_SPI_SERIAL_FLASH_BANK_ACCESS();
  78 +
  79 +       /* Enable SPI clock */
  80 +       HAL_PWRMGT_ENABLE_SPI_CLOCK();
  81 +
  82 +       cns21xx_spi_master_device.id = id;
  83 +
  84 +       spi_register_board_info(info, n);
  85 +       platform_device_register(&cns21xx_spi_master_device);
  86 +}
  87 --- a/arch/arm/mach-cns21xx/Kconfig
  88 +++ b/arch/arm/mach-cns21xx/Kconfig
  89 @@ -6,4 +6,7 @@ endmenu
  90  config CNS21XX_DEV_USB
  91         def_bool n
  92
  93 +config CNS21XX_DEV_SPI_MASTER
  94 +       def_bool n
  95 +
  96  endif
  97 --- a/arch/arm/mach-cns21xx/Makefile
  98 +++ b/arch/arm/mach-cns21xx/Makefile
  99 @@ -8,6 +8,7 @@ obj-y           := core.o devices.o gpio.o irq.o
 100
 101  # devices
 102  obj-$(CONFIG_CNS21XX_DEV_USB)          += dev-usb.o
 103 +obj-$(CONFIG_CNS21XX_DEV_SPI_MASTER)   += dev-spi-master.o
 104
 105  # machine specific files
 106
 107 --- a/arch/arm/mach-cns21xx/common.h
 108 +++ b/arch/arm/mach-cns21xx/common.h
 109 @@ -21,4 +21,8 @@ int __init cns21xx_register_uart1(void);
 110  int __init cns21xx_register_usb(void);
 111  int __init cns21xx_register_wdt(void);
 112
 113 +struct spi_board_info;
 114 +void __init cns21xx_register_spi_master(int id, struct spi_board_info *info,
 115 +                                       unsigned int n);
 116 +
 117  #endif /* _MACH_CNS21XX_COMMON_H */