Commit Graph

11 Commits

Author SHA1 Message Date
Hans de Goede b997e3edca pwm: lpss: Set enable-bit before waiting for update-bit to go low
At least on cherrytrail, the update bit will never go low when the
enabled bit is not set.

This causes the backlight on my cube iwork8 air tablet to never turn on
again after being turned off because in the pwm_lpss_apply enable path
pwm_lpss_update will fail causing an error exit and the enable-bit to
never get set. Any following pwm_lpss_apply calls will fail the
pwm_lpss_is_updating check.

Since the docs say that the update bit should be set before the
enable-bit, split pwm_lpss_update into setting the update-bit and
pwm_lpss_wait_for_update, and move the pwm_lpss_wait_for_update call
in the enable path to after setting the enable-bit.

Fixes: 10d56a4 ("pwm: lpss: Avoid reconfiguring while UPDATE bit...")
Cc: Ilkka Koskinen <ilkka.koskinen@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2017-04-06 14:48:14 +02:00
Andy Shevchenko 3c1460e934 pwm: lpss: Split Tangier configuration
As a preparation for special treatment for Broxton we split Tangier
configuration.

Fixes: b89b4b7a3d ("pwm: lpss: pci: Enable PWM module on Intel Edison")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2017-04-06 14:47:30 +02:00
Mika Westerberg ae2520540c pwm: lpss: Add Intel Gemini Lake PCI ID
Intel Gemini Lake PWM is pretty much same as used in Intel Broxton. Add
this new PCI ID to the list of supported devices.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2017-01-30 08:17:18 +01:00
Andy Shevchenko 9900073cf5 pwm: lpss: Do not export board infos for different PWM types
The PWM LPSS probe drivers just pass a pointer to the exported board
info structures to pwm_lpss_probe() based on device PCI or ACPI ID.

In order to remove the knowledge of specific devices from library part of
the driver and reduce noise in exported namespace just duplicate the
board info structures and stop exporting them.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2017-01-30 08:16:55 +01:00
Andy Shevchenko b89b4b7a3d pwm: lpss: pci: Enable PWM module on Intel Edison
Intel Edison has 4 PWM channels on the die with the same IP as in
Broxton. Enable it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2016-07-11 12:07:25 +02:00
Qipeng Zha f080be27d7 pwm: lpss: Add support for runtime PM
To be able to save some power when PWM is not in use, add support for
runtime PM for this driver. This also allows the platform to transition to
low power S0ix states when the system is idle.

Signed-off-by: Huiquan Zhong <huiquan.zhong@intel.com>
Signed-off-by: Qipeng Zha <qipeng.zha@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2015-11-06 14:34:13 +01:00
Mika Westerberg 03f00e5311 pwm: lpss: Add more Intel Broxton IDs
Add more Intel Broxton ACPI and PCI IDs to the driver supported devices
list.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2015-11-06 14:26:29 +01:00
Mika Westerberg 87219cb47e pwm: lpss: Support all four PWMs on Intel Broxton
Intel Broxton has similar PWM than Intel Braswell but instead of one it has
four PWMs included in one PCI/ACPI device. This patch adds support for all
the four PWMs and changes the PCI part of the driver to use
'pwm_lpss_bxt_info' instead.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2015-11-06 14:26:28 +01:00
Qipeng Zha 361c1066c9 pwm: lpss: pci: Add support for Broxton platform
Add PCI device IDs for Broxton platform.

Signed-off-by: Qipeng Zha <qipeng.zha@intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2015-06-12 12:46:50 +02:00
Andy Shevchenko 90927fe9a0 pwm: lpss: pci: Move to use pcim_enable_device()
Let's use managed functions for this driver.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2014-08-23 00:25:51 +02:00
Andy Shevchenko c558e39e14 pwm: lpss: Properly split driver to parts
The driver consists of core, PCI, and platform parts. It would be better
to split them into separate files.

The platform driver is now called pwm-lpss-platform. Thus, previously
set CONFIG_PWM_LPSS=m is not enough to build it. But we are on the safe
side since it seems no one from outside Intel is using it for now.

While here, move to use macros module_pci_driver() and
module_platform_driver().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Alan Cox <alan@linux.intel.com>
[thierry.reding: change select to depends on PWM_LPSS, cleanup]
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2014-08-23 00:25:47 +02:00