target/linux/cns3xxx/patches-3.8/075-spi_support.patch

   1 --- a/drivers/spi/Kconfig
   2 +++ b/drivers/spi/Kconfig
   3 @@ -130,6 +130,13 @@ config SPI_CLPS711X
   4           This enables dedicated general purpose SPI/Microwire1-compatible
   5           master mode interface (SSI1) for CLPS711X-based CPUs.
   6
   7 +config SPI_CNS3XXX
   8 +       tristate "CNS3XXX SPI controller"
   9 +       depends on ARCH_CNS3XXX && SPI_MASTER
  10 +       select SPI_BITBANG
  11 +       help
  12 +         This enables using the CNS3XXX SPI controller in master mode.
  13 +
  14  config SPI_COLDFIRE_QSPI
  15         tristate "Freescale Coldfire QSPI controller"
  16         depends on (M520x || M523x || M5249 || M525x || M527x || M528x || M532x)
  17 --- a/drivers/spi/Makefile
  18 +++ b/drivers/spi/Makefile
  19 @@ -19,6 +19,7 @@ obj-$(CONFIG_SPI_BFIN5XX)             += spi-bfin5x
  20  obj-$(CONFIG_SPI_BFIN_SPORT)           += spi-bfin-sport.o
  21  obj-$(CONFIG_SPI_BITBANG)              += spi-bitbang.o
  22  obj-$(CONFIG_SPI_BUTTERFLY)            += spi-butterfly.o
  23 +obj-$(CONFIG_SPI_CNS3XXX)              += spi-cns3xxx.o
  24  obj-$(CONFIG_SPI_CLPS711X)             += spi-clps711x.o
  25  obj-$(CONFIG_SPI_COLDFIRE_QSPI)                += spi-coldfire-qspi.o
  26  obj-$(CONFIG_SPI_DAVINCI)              += spi-davinci.o
  27 --- a/drivers/spi/spi-bitbang.c
  28 +++ b/drivers/spi/spi-bitbang.c
  29 @@ -328,6 +328,12 @@ static void bitbang_work(struct work_str
  30                                  */
  31                                 if (!m->is_dma_mapped)
  32                                         t->rx_dma = t->tx_dma = 0;
  33 +
  34 +                               if (t->transfer_list.next == &m->transfers)
  35 +                                       t->last_in_message_list = 1;
  36 +                               else
  37 +                                       t->last_in_message_list = 0;
  38 +
  39                                 status = bitbang->txrx_bufs(spi, t);
  40                         }
  41                         if (status > 0)
  42 --- a/include/linux/spi/spi.h
  43 +++ b/include/linux/spi/spi.h
  44 @@ -511,6 +511,13 @@ struct spi_transfer {
  45         u32             speed_hz;
  46
  47         struct list_head transfer_list;
  48 +
  49 +#ifdef CONFIG_ARCH_CNS3XXX
  50 +       unsigned        last_in_message_list;
  51 +#ifdef CONFIG_SPI_CNS3XXX_2IOREAD
  52 +       u8      dio_read;
  53 +#endif
  54 +#endif
  55  };
  56
  57  /**