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Revert "ACPI / LPSS: Remove non-existing clock control from Intel Lyn…
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…xpoint I2C"

Revert commit b893e80 ("ACPI / LPSS: Remove non-existing clock control
from Intel Lynxpoint I2C") because it causes touchpad to not load on Dell
XPS13.

Regression is a clear indication that not only some early prototype version
of Lynxpoint I2C but also newer versions can be doing clock gating even
documentation does not state it.

Therefore it is best to revert since this clock gating haven't caused known
issues on those Lynxpoint version which don't do clock gating.

Reported-by-and-tested-by: Chris Rorvick <chris@rorvick.com>
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Jarkko Nikula authored and Rafael J. Wysocki committed Feb 17, 2015
1 parent 92082a8 commit f8f87c0
Showing 1 changed file with 1 addition and 1 deletion.
2 changes: 1 addition & 1 deletion drivers/acpi/acpi_lpss.c
Original file line number Diff line number Diff line change
Expand Up @@ -125,7 +125,7 @@ static struct lpss_device_desc lpt_dev_desc = {
};

static struct lpss_device_desc lpt_i2c_dev_desc = {
.flags = LPSS_CLK | LPSS_LTR,
.flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_LTR,
.prv_offset = 0x800,
};

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