[coreboot-gerrit] Patch merged into coreboot/master: t210: SPI driver cleanup

the following patch was just integrated into master:
commit 7731cddaa22746f6884300177bd8c03aeeffadc2
Author: Furquan Shaikh 
Date:   Mon Jul 13 10:14:16 2015 -0700

t210: SPI driver cleanup

1. Get rid of spi_delay - Instead have a tight loop to check for the
    spi status
    2. The first check for SPI operation complete i.e. FIFOs have been
    processed is the SPI_STATUS_RDY bit. Thus, tegra_spi_wait should check
    for this bit before reading BLOCK_COUNT or any other fifo count field.
    3. Flush both TX and RX FIFOs for SEND and RECV operations for PIO and
    DMA.
    4. No need to check for rx_fifo_count == spi_byte_count to determine
    pio_finish operation. RDY bit should be sufficient to ensure that the
    SPI operation is complete. Added assert to ensure we never hit the
    case of RDY bit being set, yet rx_fifo_count != spi_byte_count for
    PIO.

BUG=chrome-os-partner:41877
    BRANCH=None
    TEST=Compiles successfully and reboot test runs successfully for 10K+ iterations.

Change-Id: I1adb9672c1503b562309a8bc6c22fe7d2271768e
    Signed-off-by: Patrick Georgi 
    Original-Commit-Id: de1515605e17e0c6b81874f9f3c49fd0c1b92756
    Original-Change-Id: I5853d0df1bfd6020a17e478040bc4c1834563fe4
    Original-Signed-off-by: Furquan Shaikh 
    Original-Reviewed-on: https://chromium-review.googlesource.com/285141
    Original-Reviewed-by: Jimmy Zhang 
    Original-Tested-by: Jimmy Zhang 
    Original-Reviewed-by: Furquan Shaikh 
    Original-Tested-by: Furquan Shaikh 
    Original-Commit-Queue: Furquan Shaikh 
    Original-Trybot-Ready: Furquan Shaikh 
    Reviewed-on: http://review.coreboot.org/10947
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/10947 for details.

-gerrit