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Evan Green 6eefaee4f2
spi: pxa2xx: Apply CS clk quirk to BXT
With a couple allies at Intel, and much badgering, I got confirmation
from Intel that at least BXT suffers from the same SPI chip-select
issue as Cannonlake (and beyond). The issue being that after going
through runtime suspend/resume, toggling the chip-select line without
also sending data does nothing.

Add the quirk to BXT to briefly toggle dynamic clock gating off and
on, forcing the fabric to wake up enough to notice the CS register
change.

Signed-off-by: Evan Green <evgreen@chromium.org>
Cc: Shobhit Srivastava <shobhit.srivastava@intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200427163238.1.Ib1faaabe236e37ea73be9b8dcc6aa034cb3c8804@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-04-30 15:22:58 +01:00
arch
block
certs
crypto
Documentation Linux 5.7-rc3 2020-04-27 15:04:50 +01:00
drivers spi: pxa2xx: Apply CS clk quirk to BXT 2020-04-30 15:22:58 +01:00
fs Five cifs/smb3 fixes, 3 for DFS, one for stable 2020-04-26 11:44:17 -07:00
include
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tools Linux 5.7-rc3 2020-04-27 15:04:50 +01:00
usr
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MAINTAINERS spi: spi-amd: Add AMD SPI controller driver support 2020-04-27 16:38:32 +01:00
Makefile Linux 5.7-rc3 2020-04-26 13:51:02 -07:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.