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All AM62 devices have Errata i2409 [1] due to which
USB2 PHY may lock up due to short suspend.
Workaround involves setting bit 5 and 4 PLL_REG12
in PHY2 register space after USB controller is brought
out of LPSC reset but before controller initialization.
Handle this workaround.
[1] - https://www.ti.com/lit/er/sprz487d/sprz487d.pdf
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20240227-for-v6-9-am62-usb-errata-3-0-v4-4-0ada8ddb0767@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
TRM information is outdated and design team has confirmed
that PHY_CORE_VOLTAGE should be 0 irrespective of
VDD_CORE voltage.
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20240227-for-v6-9-am62-usb-errata-3-0-v4-3-0ada8ddb0767@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Disable wakeup at remove.
Fixes the below warnings on module unload and reload.
> dwc3-am62 f900000.dwc3-usb: couldn't enable device as a wakeup source: -17
> dwc3-am62 f910000.dwc3-usb: couldn't enable device as a wakeup source: -17
Fixes: 4e3972b589da ("usb: dwc3-am62: Enable as a wakeup source by default")
Cc: stable@vger.kernel.org # v6.4+
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20240227-for-v6-9-am62-usb-errata-3-0-v4-2-0ada8ddb0767@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
As runtime PM is enabled, the module can be runtime
suspended when .remove() is called.
Do a pm_runtime_get_sync() to make sure module is active
before doing any register operations.
Doing a pm_runtime_put_sync() should disable the refclk
so no need to disable it again.
Fixes the below warning at module removel.
[ 39.705310] ------------[ cut here ]------------
[ 39.710004] clk:162:3 already disabled
[ 39.713941] WARNING: CPU: 0 PID: 921 at drivers/clk/clk.c:1090 clk_core_disable+0xb0/0xb8
We called of_platform_populate() in .probe() so call the
cleanup function of_platform_depopulate() in .remove().
Get rid of the now unnnecessary dwc3_ti_remove_core().
Without this, module re-load doesn't work properly.
Fixes: e8784c0aec03 ("drivers: usb: dwc3: Add AM62 USB wrapper driver")
Cc: stable@vger.kernel.org # v5.19+
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20240227-for-v6-9-am62-usb-errata-3-0-v4-1-0ada8ddb0767@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove unnecessary platform_set_drvdata(..., NULL) in ->remove(),
the driver_data will be cleared in device_unbind_cleanup() after
calling ->remove() in driver call code.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20230810134710.114356-1-yangyingliang@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rename dwc3_data to dwc3_am62 to make it consistent with other
glue drivers, it's clearer that this is am62's specific.
While there, do the same for data variable.
Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Link: https://lore.kernel.org/r/ZLKoHhJvT+Y6aM+C@lenoch
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart from
emitting a warning) and this typically results in resource leaks. To improve
here there is a quest to make the remove callback return void. In the first
step of this quest all drivers are converted to .remove_new() which already
returns void. Eventually after all drivers are converted, .remove_new() is
renamed to .remove().
Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20230517230239.187727-14-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Several USB drivers use of_platform_* functions which are declared in
of_platform.h. of_platform.h gets implicitly included by of_device.h,
but that is going to be removed soon. Nothing else depends on of_device.h
so it can be dropped.
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Acked-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230410232639.1561152-1-robh@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Explicitly set and clear wakeup config so we don't leave anything
to chance.
Clear wakeup status on suspend so we know what caused wake up.
The LINESTATE wake up should not be enabled in device mode
if we are not connected to a USB host and in USB suspend (U2/L3)
else it will cause spurious wake up.
For now, don't enable LINESTATE. This means wake up from
USB resume will not work but at least we won't have any spurious
wake ups.
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20230324114429.21838-1-rogerq@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
USB module can wakeup system. Enable it as a wakeup source
by default. Finer grain wakeup enable/disable can be done
from the power/wakeup system control file of the respective
USB device.
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20230316131226.89540-3-rogerq@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The USB2SS IP in TI's AM62 SoC is capable of supporting wakeup from
deep sleep based on the following events,
1) VBUS state change
2) Overcurrent detection
3) Line state change
Wakeup from these events can enabled by setting their corresponding bits
in the WAKEUP_CONFIG register. The events to be enabled are decided based
on the current role of the controller.
When the role of the controller is host, the comparators for detecting
VBUS state change are disabled while entering low power mode. This is done
as VBUS state is not used in host mode and disabling the comparators helps
in reducing the power consumption. So, wakeup from VBUS state change should
be disabled in host mode. While operating in peripheral mode all the wakeup
events can be enabled.
Therefore, add support for the same in the suspend/resume hooks.
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20230316131226.89540-2-rogerq@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The clk get by devm_clk_get() will be released in devres_release_all(),
so there is no need explicitly call clk_put(), or it will cause UAF.
Fixes: e8784c0aec03 ("drivers: usb: dwc3: Add AM62 USB wrapper driver")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220629094635.3116961-1-yangyingliang@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In AM62 SoC, the Designware Core USB3 IP is progammed to operate in USB2.0
only mode. Add driver for AM62 USB DWC3 Wrapper.
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Link: https://lore.kernel.org/r/20220414103211.16202-3-a-govindraju@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
