target/linux/pistachio/patches-4.9/103-spi-img-spfi-set-device-select-bits-for-SPFI-port-st.patch

   1 From 145f5369510b86cd55c659388a26a0cc267f8874 Mon Sep 17 00:00:00 2001
   2 From: Ionela Voinescu <ionela.voinescu@imgtec.com>
   3 Date: Mon, 1 Feb 2016 10:58:08 +0000
   4 Subject: spi: img-spfi: set device select bits for SPFI port state
   5
   6 Even if the chip select line is not controlled by the SPFI
   7 hardware, the device select bits need to be set to specify
   8 the chip select line in use for the hardware to know what
   9 parameters to use for the current transfer.
  10
  11 Signed-off-by: Ionela Voinescu <ionela.voinescu@imgtec.com>
  12 ---
  13  drivers/spi/spi-img-spfi.c | 3 +++
  14  1 file changed, 3 insertions(+)
  15
  16 diff --git a/drivers/spi/spi-img-spfi.c b/drivers/spi/spi-img-spfi.c
  17 index c845a50..0d73d31 100644
  18 --- a/drivers/spi/spi-img-spfi.c
  19 +++ b/drivers/spi/spi-img-spfi.c
  20 @@ -438,6 +438,9 @@ static int img_spfi_prepare(struct spi_master *master, struct spi_message *msg)
  21         u32 val;
  22
  23         val = spfi_readl(spfi, SPFI_PORT_STATE);
  24 +       val &= ~(SPFI_PORT_STATE_DEV_SEL_MASK <<
  25 +                SPFI_PORT_STATE_DEV_SEL_SHIFT);
  26 +       val |= msg->spi->chip_select << SPFI_PORT_STATE_DEV_SEL_SHIFT;
  27         if (msg->spi->mode & SPI_CPHA)
  28                 val |= SPFI_PORT_STATE_CK_PHASE(msg->spi->chip_select);
  29         else
  30 --
  31 2.7.4
  32