linux/drivers/usb
Kyle Tso a07ddce4df usb: typec: tcpm: Correct the PPS out_volt calculation
When Sink negotiates PPS, the voltage range of selected PPS APDO might
not cover the previous voltage (out_volt). If the previous out_volt is
lower than the new min_volt, the output voltage in RDO might be set to
an invalid value. For instance, supposed that the previous voltage is
5V, and the new voltage range in the APDO is 7V-12V. Then the output
voltage in the RDO should not be set to 5V which is lower than the
possible min_volt 7V.

Fix this by choosing the maximal value between the previous voltage and
the new min_volt first. And ensure that this value will not exceed the
new max_volt. The new out_volt will fall within the new voltage range
while being the closest value compared to the previous out_volt.

Signed-off-by: Kyle Tso <kyletso@google.com>
Reviewed-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Fixes: c710d0bb76 ("usb: typec: tcpm: Extend the matching rules on PPS APDO selection")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-31 09:14:00 +01:00
..
atm
c67x00
chipidea usb: chipidea: fix static checker warning for NULL pointer 2019-01-18 09:35:33 +01:00
class usb: cdc-acm: send ZLP for Telit 3G Intel based modems 2019-01-07 17:23:29 +01:00
common usb: roles: Add a description for the class to Kconfig 2018-12-17 14:07:59 +01:00
core USB: leds: fix regression in usbport led trigger 2019-01-18 09:55:05 +01:00
dwc2 usb: dwc2: gadget: Fix Remote Wakeup interrupt bit clearing 2019-01-17 15:56:53 +02:00
dwc3 usb: dwc3: exynos: Fix error handling of clk_prepare_enable 2019-01-28 15:31:11 +02:00
early
gadget usb: gadget: udc: net2272: Fix bitwise and boolean operations 2019-01-28 15:27:21 +02:00
host USB: EHCI: ehci-mv: add MODULE_DEVICE_TABLE 2019-01-18 10:07:05 +01:00
image scsi: flip the default on use_clustering 2018-12-18 23:13:12 -05:00
isp1760
misc Merge 4.20-rc6 into usb-next 2018-12-10 10:19:08 +01:00
mon
mtu3 usb: mtu3: fix dbginfo in qmu_tx_zlp_error_handler 2018-12-07 07:58:28 +02:00
musb usb: gadget: musb: fix short isoc packets with inventra dma 2019-01-30 15:48:10 +01:00
phy usb: phy: am335x: fix race condition in _probe 2019-01-28 15:31:43 +02:00
renesas_usbhs usb: renesas_usbhs: add support for RZ/G2E 2018-12-17 14:07:59 +01:00
roles usb: roles: Add a description for the class to Kconfig 2018-12-17 14:07:59 +01:00
serial USB: serial: keyspan_usa: add proper SPDX lines for .h files 2019-01-18 11:09:32 +01:00
storage USB: storage: add quirk for SMI SM3350 2019-01-07 17:23:30 +01:00
typec usb: typec: tcpm: Correct the PPS out_volt calculation 2019-01-31 09:14:00 +01:00
usbip USB: usbip: delete README file 2019-01-18 09:35:33 +01:00
wusbcore
Kconfig usb: roles: Add a description for the class to Kconfig 2018-12-17 14:07:59 +01:00
Makefile
README
usb-skeleton.c

To understand all the Linux-USB framework, you'll use these resources:

    * This source code.  This is necessarily an evolving work, and
      includes kerneldoc that should help you get a current overview.
      ("make pdfdocs", and then look at "usb.pdf" for host side and
      "gadget.pdf" for peripheral side.)  Also, Documentation/usb has
      more information.

    * The USB 2.0 specification (from www.usb.org), with supplements
      such as those for USB OTG and the various device classes.
      The USB specification has a good overview chapter, and USB
      peripherals conform to the widely known "Chapter 9".

    * Chip specifications for USB controllers.  Examples include
      host controllers (on PCs, servers, and more); peripheral
      controllers (in devices with Linux firmware, like printers or
      cell phones); and hard-wired peripherals like Ethernet adapters.

    * Specifications for other protocols implemented by USB peripheral
      functions.  Some are vendor-specific; others are vendor-neutral
      but just standardized outside of the www.usb.org team.

Here is a list of what each subdirectory here is, and what is contained in
them.

core/		- This is for the core USB host code, including the
		  usbfs files and the hub class driver ("hub_wq").

host/		- This is for USB host controller drivers.  This
		  includes UHCI, OHCI, EHCI, and others that might
		  be used with more specialized "embedded" systems.

gadget/		- This is for USB peripheral controller drivers and
		  the various gadget drivers which talk to them.


Individual USB driver directories.  A new driver should be added to the
first subdirectory in the list below that it fits into.

image/		- This is for still image drivers, like scanners or
		  digital cameras.
../input/	- This is for any driver that uses the input subsystem,
		  like keyboard, mice, touchscreens, tablets, etc.
../media/	- This is for multimedia drivers, like video cameras,
		  radios, and any other drivers that talk to the v4l
		  subsystem.
../net/		- This is for network drivers.
serial/		- This is for USB to serial drivers.
storage/	- This is for USB mass-storage drivers.
class/		- This is for all USB device drivers that do not fit
		  into any of the above categories, and work for a range
		  of USB Class specified devices. 
misc/		- This is for all USB device drivers that do not fit
		  into any of the above categories.