linux-kernel - [PATCH 00/10] spi-nor: intel-spi: Various fixes and enhancements

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Message-Id: <1504252841-2445-1-git-send-email-bmeng.cn@gmail.com>
Date:   Fri,  1 Sep 2017 01:00:31 -0700
From:   Bin Meng <bmeng.cn@...il.com>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>,
        Marek Vasut <marek.vasut@...il.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Brian Norris <computersforpeace@...il.com>,
        Richard Weinberger <richard@....at>,
        David Woodhouse <dwmw2@...radead.org>,
        linux-mtd <linux-mtd@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Cc:     Stefan Roese <sr@...x.de>
Subject: [PATCH 00/10] spi-nor: intel-spi: Various fixes and enhancements

This series does several bug fixes and clean ups against the intel-spi
spi-nor driver, as well as enhancements to make the driver independent
on the underlying BIOS/bootloader.

At present the driver uses the HW sequencer for the read/write/erase on
all supported platforms, read_reg/write_reg for BXT, and the SW sequencer
for read_reg/write_reg for BYT/LPT. The way the driver uses the HW and SW
sequencer relies on some programmed register settings and hence creates
unneeded dependencies with the underlying BIOS/bootloader. For example,
the driver unfortunately does not work as expected when booting from
Intel Baytrail FSP based bootloaders like U-Boot, as the Baytrail FSP
does not set up some SPI controller settings to make the driver happy.
Now such limitation has been removed with this series.

Bin Meng (10):
  spi-nor: intel-spi: Fix number of protected range registers for
    BYT/LPT
  spi-nor: intel-spi: Remove useless 'buf' parameter in the HW/SW cycle
  spi-nor: intel-spi: Fix broken software sequencing codes
  spi-nor: intel-spi: Check transfer length in the HW/SW cycle
  spi-nor: intel-spi: Use SW sequencer for BYT/LPT
  spi-nor: intel-spi: Remove 'Atomic Cycle Sequence' in
    intel_spi_write()
  spi-nor: intel-spi: Don't assume OPMENU0/1 to be programmed by BIOS
  spi-nor: intel-spi: Remove the unnecessary HSFSTS register RW
  spi-nor: intel-spi: Rename swseq to swseq_reg in 'struct intel_spi'
  spi-nor: intel-spi: Fall back to use SW sequencer to erase

 drivers/mtd/spi-nor/intel-spi.c | 209 +++++++++++++++++++++++++++++-----------
 1 file changed, 151 insertions(+), 58 deletions(-)

-- 
2.9.2