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There is no need to store the dentry pointer for a debugfs file that we
only use to remove it when the device goes away. debugfs can do the
lookup for us instead, saving us some trouble, and making things smaller
overall.
Cc: Peter Chen <peter.chen@kernel.org>
Link: https://lore.kernel.org/r/20210525171419.758146-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit 0bd0f6d201 ("usb: dwc3: gadget: remove allocated/queued request
tracking") removed the allocated & queued fields from struct dwc3_ep
but neglected to also remove them from the dwc3_log_trb event class's
TP_STRUCT definition which are now unused. Remove them to save eight
bytes per trace event entry.
Signed-off-by: Mayank Rana <mrana@codeaurora.org>
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Link: https://lore.kernel.org/r/20210527012924.3596-1-jackp@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The additional boolean device property "orientation-switch"
is not needed when the connection is described with device
graph, so removing the check and the requirement for it.
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20210526153548.61276-3-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Both the USB Type-C switch and mux have already a device
type defined for them. We can use those types instead of the
device name to differentiate the two.
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20210526153548.61276-2-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Introduces usb_role_string() function, which returns a
human-readable name of provided usb role, it's useful to
make the log readable.
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1621932786-9335-1-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The sparse tool complains as follows:
drivers/usb/typec/tcpm/tcpci.c:118:5: warning:
symbol 'tcpci_apply_rc' was not declared. Should it be static?
This symbol is not used outside of tcpci.c, so marks it static.
Fixes: 7257fbc7c5 ("usb: typec: tcpci: Implement callback for apply_rc")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Link: https://lore.kernel.org/r/20210524133704.2432555-1-weiyongjun1@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The driver is using open-coded variant of of_find_i2c_device_by_node().
Replace it by the actual call to the above mentioned API.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210521145243.87911-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
usb_sndctrlpipe() is evaluated in do_proc_control(), saved in a
variable, then evaluated again. Use the saved variable instead, to
match the use of usb_rcvctrlpipe().
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Geoffrey D. Bennett <g@b4.vu>
Link: https://lore.kernel.org/r/20210521174027.GA116484@m.b4.vu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The opening comment mark '/**' is used for highlighting the beginning of
kernel-doc comments.
The header for drivers/usb/gadget/udc/trace files follows this syntax, but
the content inside does not comply with kernel-doc.
This line was probably not meant for kernel-doc parsing, but is parsed
due to the presence of kernel-doc like comment syntax(i.e, '/**'), which
causes unexpected warning from kernel-doc.
For e.g., running scripts/kernel-doc -none drivers/usb/gadget/udc/trace.h
emits:
warning: expecting prototype for udc.c(). Prototype was for TRACE_SYSTEM() instead
Provide a simple fix by replacing this occurrence with general comment
format, i.e. '/*', to prevent kernel-doc from parsing it.
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Aditya Srivastava <yashsri421@gmail.com>
Link: https://lore.kernel.org/r/20210522115227.9977-1-yashsri421@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When a control URB is submitted, the direction indicated by URB's pipe
member is supposed to match the direction indicated by the setup
packet's bRequestType member. A mismatch could lead to trouble,
depending on which field the host controller drivers use for
determining the actual direction.
This shouldn't ever happen; it would represent a careless bug in a
kernel driver somewhere. This patch adds a dev_WARN_ONCE to let
people know about the potential problem.
Suggested-by: "Geoffrey D. Bennett" <g@b4.vu>
Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20210522021623.GB1260282@rowland.harvard.edu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
APPLY RC is defined as ROLE_CONTROL.CC1 != ROLE_CONTROL.CC2 and
POWER_CONTROL.AutodischargeDisconnect is 0. When ROLE_CONTROL.CC1 ==
ROLE_CONTROL.CC2, set the other CC to OPEN.
Fixes: f321a02cae ("usb: typec: tcpm: Implement enabling Auto Discharge disconnect support")
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20210517192112.40934-4-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When vbus auto discharge is enabled, TCPCI based TCPC transitions
into Attached.SNK/Attached.SRC state. During PR_SWAP, TCPCI based
TCPC would disconnect when partner changes power roles. TCPC has
to be moved APPLY RC state during PR_SWAP. This is done by
ROLE_CONTROL.CC1 != ROLE_CONTROL.CC2 and
POWER_CONTROL.AutodischargeDisconnect is 0. Once the swap sequence
is done, AutoDischargeDisconnect is re-enabled.
Fixes: f321a02cae ("usb: typec: tcpm: Implement enabling Auto Discharge disconnect support")
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20210517192112.40934-3-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The logic to enable vbus auto discharge on disconnect is used in
more than one place. Since this is repetitive code, moving this into
its own method.
Fixes: f321a02cae ("usb: typec: tcpm: Implement enabling Auto Discharge disconnect support")
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20210517192112.40934-2-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
During PR_SWAP, When TCPM is in PR_SWAP_SNK_SRC_SINK_OFF, vbus is
expected to reach VSAFE0V when source turns off vbus. Do not move
to SNK_UNATTACHED state when this happens.
Fixes: 28b43d3d74 ("usb: typec: tcpm: Introduce vsafe0v for vbus")
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20210517192112.40934-1-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
There's no need to initialise irq-flags variables before saving the
interrupt state.
Drop the redundant initialisations from drivers that got this wrong.
Cc: Li Yang <leoyang.li@nxp.com>
Cc: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20210519093303.10789-4-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
There's no need to initialise irq-flags variables before saving the
interrupt state.
While at it drop two redundant return-value initialisations from two of
the functions that got it wrong.
Cc: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20210519093303.10789-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
There's no need to initialise irq-flags variables before saving the
interrupt state.
Cc: Pawel Laszczak <pawell@cadence.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20210519093303.10789-2-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rather than testing if the error code is -EPROBE_DEFER before printing
an error message, use dev_err_probe() instead to simplify the code.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://lore.kernel.org/r/20210519163553.212682-2-jonathanh@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The Tegra XUDC driver prints the following error when deferring probe
if the USB PHY is not found ...
ERR KERN tegra-xudc 3550000.usb: failed to get usbphy-0: -517
Deferring probe can be normal and so update to driver to avoid printing
this error if probe is being deferred.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://lore.kernel.org/r/20210519163553.212682-1-jonathanh@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Besides the already host mode support add peripheral mode support for
the isp1763 IP from the isp1760 family.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Link: https://lore.kernel.org/r/20210513084717.2487366-10-rui.silva@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
isp1763 have some differences from the isp1760, 8 bit address for
registers and 16 bit for values, no bulk access to memory addresses,
16 PTD's instead of 32.
Following the regmap work done before add the registers, memory access
and add the functions to support differences in setup sequences.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Link: https://lore.kernel.org/r/20210513084717.2487366-8-rui.silva@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
There is already a binding to describe the dual role mode (dr_mode),
use that instead of defining a new one (port1-otg).
Update driver code and devicetree files that use that port1-otg
binding.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Link: https://lore.kernel.org/r/20210513084717.2487366-7-rui.silva@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In preparation to support other family member IP, which may have
different memory layout. Drop macros and setup a configuration
struct.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Link: https://lore.kernel.org/r/20210513084717.2487366-6-rui.silva@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Since the removal of the Blackfin port with:
commit 4ba66a9760 ("arch: remove blackfin port")
No one is using or referencing this header and platform data struct.
Remove them.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Link: https://lore.kernel.org/r/20210513084717.2487366-5-rui.silva@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use io relaxed access memory primitives to satisfy strict type
checking (__force).
This will fix some existing sparse warnings:
sparse: warning: cast to restricted __le32
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Link: https://lore.kernel.org/r/20210513084717.2487366-4-rui.silva@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rework access to registers and memory to use regmap framework.
No change in current feature or way of work is intended with this
change.
This will allow to reuse this driver with other IP of this family,
for example isp1763, with little changes and effort.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Link: https://lore.kernel.org/r/20210513084717.2487366-3-rui.silva@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
There are a lot of pre-existing typechecking warnings around the
access and assign of elements of ptd structure of __dw type.
sparse: warning: invalid assignment: |=
sparse: left side has type restricted __dw
sparse: right side has type unsigned int
or
warning: restricted __dw degrades to integer
or
sparse: warning: incorrect type in assignment (different base types)
sparse: expected restricted __dw [usertype] dw4
sparse: got unsigned int [assigned] [usertype] usof
To handle this, annotate conversions along the {TO,FROM}_DW* macros
and some assignments and function arguments.
This clean up completely all sparse warnings for this driver.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Link: https://lore.kernel.org/r/20210513084717.2487366-2-rui.silva@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When power on system with OTG cable, IDDIG's interrupt arises before
the charger registration, it will cause a NULL pointer dereference,
fix the issue by registering the power supply before requesting
IDDIG/VBUS irq.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1621406386-18838-1-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
On start-up, we can get a spurious session request interrupt with nothing
connected. After that the devctl session bit will silently clear, but the
musb hardware is never idled until a cable is plugged in, or the glue
layer module is reloaded.
Let's just check the session bit again in 3 seconds in peripheral mode
to catch the issue.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20210518150615.53464-1-tony@atomide.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Looks like we are missing suspend and resume functions for pm_ops that
are needed to idle the hardware for system suspend for 2430 glue layer.
We can rely on the driver internal PM runtime state, and call driver
functions to idle the hardware on suspend if needed. There is no need
to add a dependency to PM runtime for system suspend here.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20210518074449.17070-1-tony@atomide.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This reverts commit ca91fd8c76 ("USB: Add reset-resume quirk for
WD19's Realtek Hub"). The previous patch in the series now handles
the problematic hubs by checking the port status and handling it
accordingly when PORT_SUSPEND timeout occurs. We don't need to use
reset-resume all the time.
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Chris Chiu <chris.chiu@canonical.com>
Link: https://lore.kernel.org/r/20210514045405.5261-3-chris.chiu@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
On the Realtek high-speed Hub(0bda:5487), the port which has wakeup
enabled_descendants will sometimes timeout when setting PORT_SUSPEND
feature. After checking the PORT_SUSPEND bit in wPortStatus, it is
already set which means the port has been suspended. We should treat
it suspended to make sure it will be resumed correctly.
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Chris Chiu <chris.chiu@canonical.com>
Link: https://lore.kernel.org/r/20210514045405.5261-2-chris.chiu@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Make use of the struct_size() helper instead of an open-coded version,
in order to avoid any potential type mistakes or integer overflows
that, in the worse scenario, could lead to heap overflows.
This code was detected with the help of Coccinelle and, audited and
fixed manually.
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20210513193353.GA196565@embeddedor
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Constify a couple of ops-structs that are never modified, to let the
compiler put them in read-only memory.
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Link: https://lore.kernel.org/r/20210513200908.448351-1-rikard.falkeborn@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit e6604a7fd7 ("EHCI: Quirk flag for port power handling
on overcurrent.") activated the quirks handling (flag need_oc_pp_cycle)
for Freescale 83xx based boards.
Activate same for 85xx based boards as well.
Cc: xe-linux-external@cisco.com
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Gopalakrishnan Santhanam <gsanthan@cisco.com>
Signed-off-by: Daniel Walker <danielwa@cisco.com>
Link: https://lore.kernel.org/r/20210513083225.68912-1-gsanthan@cisco.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
There is no need to store the dentry pointer for a debugfs file that we
only use to remove it when the device goes away. debugfs can do the
lookup for us instead, saving us some trouble, and making things smaller
overall.
Cc: Daniel Mack <daniel@zonque.org>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: linux-usb@vger.kernel.org
Acked-by: Daniel Mack <daniel@zonque.org>
Link: https://lore.kernel.org/r/20210518162054.3697992-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
There is no need to store the dentry pointer for a debugfs file that we
only use to remove it when the device goes away. debugfs can do the
lookup for us instead, saving us some trouble, and making things smaller
overall.
Cc: Felipe Balbi <balbi@kernel.org>
Cc: linux-usb@vger.kernel.org
Link: https://lore.kernel.org/r/20210518162105.3698090-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
There is no need to store the dentry for a fixed filename that we have
the string for. So just have debugfs look it up when we need it to
remove the file, no need to store it anywhere locally.
Note, this driver is broken in that debugfs will not work for more than
one instance of the device it supports. But given that this patch does
not change that, and no one has ever seemed to notice, it must not be an
issue...
Cc: Felipe Balbi <balbi@kernel.org>
Cc: Vladimir Zapolskiy <vz@mleia.com>
Cc: linux-usb@vger.kernel.org
Acked-by: Vladimir Zapolskiy <vz@mleia.com>
Acked-by: Felipe Balbi <balbi@kernel.org>
Link: https://lore.kernel.org/r/20210518162035.3697860-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The top comment in the file wrongly uses kernel doc format:
.../typec/tcpm/wcove.c:17: warning: expecting prototype for typec_wcove.c - WhiskeyCove PMIC USB Type(). Prototype was for WCOVE_CHGRIRQ0() instead
Fix this by converting it to plain comment.
Fixes: ae8a2ca8a2 ("usb: typec: Group all TCPCI/TCPM code together")
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210519085527.48657-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Here are 2 driver fixes for driver core changes that happened in
5.13-rc1.
The clk driver fix resolves a many-reported issue with booting some
devices, and the USB typec fix resolves the reported problem of USB
systems on some embedded boards.
Both of these have been in linux-next this week with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-5.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg KH:
"Here are two driver fixes for driver core changes that happened in
5.13-rc1.
The clk driver fix resolves a many-reported issue with booting some
devices, and the USB typec fix resolves the reported problem of USB
systems on some embedded boards.
Both of these have been in linux-next this week with no reported
issues"
* tag 'driver-core-5.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
clk: Skip clk provider registration when np is NULL
usb: typec: tcpm: Don't block probing of consumers of "connector" nodes
Use map_urb_for_dma() to improve the dma map code for single step
set feature request urb in test mode.
Signed-off-by: Li Jun <jun.li@nxp.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/1620452039-11694-3-git-send-email-jun.li@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
It is needed at USB Certification test for Embedded Host 2.0, and
the detail is at CH6.4.1.1 of On-The-Go and Embedded Host Supplement
to the USB Revision 2.0 Specification. Since other USB 2.0 capable
host like XHCI also need it, so move it to HCD core.
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Li Jun <jun.li@nxp.com>
Link: https://lore.kernel.org/r/1620452039-11694-1-git-send-email-jun.li@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
There's no separate low power (LP) version of Elkhart Lake, thus
this patch updates the PCI Device ID DEFINE to indicate this.
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Raymond Tan <raymond.tan@intel.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20210512135901.28495-1-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This may happen if the port becomes resume status exactly
when usb_port_resume() gets port status, it still need provide
a TRSMCRY time before access the device.
CC: <stable@vger.kernel.org>
Reported-by: Tianping Fang <tianping.fang@mediatek.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/20210512020738.52961-1-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This is a regression introduced by 1373fefc62 ("usb: typec: tcpm:
Allow slow charging loops to comply to pSnkStby")
When Source advertises Rp-default, tcpm would request 500mA when in
SINK_DISCOVERY, Type-C spec advises the sink to follow BC1.2 current
limits when Rp-default is advertised.
[12750.503381] Requesting mux state 1, usb-role 2, orientation 1
[12750.503837] state change SNK_ATTACHED -> SNK_STARTUP [rev3 NONE_AMS]
[12751.003891] state change SNK_STARTUP -> SNK_DISCOVERY
[12751.003900] Setting voltage/current limit 5000 mV 500 mA
This patch restores the behavior where the tcpm would request 0mA when
Rp-default is advertised by the source.
[ 73.174252] Requesting mux state 1, usb-role 2, orientation 1
[ 73.174749] state change SNK_ATTACHED -> SNK_STARTUP [rev3 NONE_AMS]
[ 73.674800] state change SNK_STARTUP -> SNK_DISCOVERY
[ 73.674808] Setting voltage/current limit 5000 mV 0 mA
During SNK_DISCOVERY, Cap the current limit to PD_P_SNK_STDBY_MW / 5 only
for slow_charger_loop case.
Fixes: 1373fefc62 ("usb: typec: tcpm: Allow slow charging loops to comply to pSnkStby")
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20210510211756.3346954-1-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
