spi: davinci: add support for interrupt mode

Add support for SPI interrupt mode operation.

Define a per chip-select "io type" variable which
specifies if the transfers on this chip-select should
happen in interrupt mode or polled mode.

Introduce a new function davinci_spi_process_events()
to help consolidate the code between interrupt mode
processing and polled mode processing.

Signed-off-by: Brian Niebuhr <bniebuhr@efjohnson.com>
Tested-By: Michael Williamson <michael.williamson@criticallink.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/include/mach/spi.h b/arch/arm/mach-davinci/include/mach/spi.h
index e68afe23885b..ab45b89a0c5f 100644
--- a/arch/arm/mach-davinci/include/mach/spi.h
+++ b/arch/arm/mach-davinci/include/mach/spi.h
@@ -30,6 +30,7 @@ struct davinci_spi_platform_data {
         u8      version;
         u8      num_chipselect;
         u8      clk_internal;
+        u8      intr_line;
         u8      use_dma;
         u8      *chip_sel;
 };
@@ -38,6 +39,9 @@ struct davinci_spi_config {
         u8      wdelay;
         u8      odd_parity;
         u8      parity_enable;
+#define SPI_IO_TYPE_INTR        0
+#define SPI_IO_TYPE_POLL        1
+        u8      io_type;
         u8      timer_disable;
         u8      c2tdelay;
         u8      t2cdelay;