Detection of the Xtal mode is using magic numbers that
can be avoided using properly some definitions and a more
accurate variable name from 'reg' into 'xtal_mode'. This
increase readability.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200321133624.31388-4-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Macro builtin_platform_driver can be used for builtin drivers
that don't do anything in driver init. So, use the macro
builtin_platform_driver and remove some boilerplate code.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200321133624.31388-3-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This soc has two phy's for the pcie one of them using just a different
register for settig it up but sharing all the rest of the config. Until
now we was presenting this schema as three different phy's in the device
tree using the 'phy-cells' node property to discriminate an index and
setting up a complete phy for the dual port index. This sometimes worked
properly but reconfiguring the same registers twice presents sometimes
some unstable pcie links and the ports was not properly being detected.
The problems only appears on hard resets and soft resets was properly
working. Instead of having this schema just set two phy's in the device
ree and use the 'phy-cells' property to say if the port has or not a dual
port. Doing this configuration and set up becomes easier, LOC is decreased
and the behaviour also gets deterministic with properly and stable pcie
links in both hard and soft resets.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200320110123.9907-2-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In order to simplify driver code and decrease a bit LOC add new
function 'mt7621_phy_rmw' where clear and set bits are passed as
arguments.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20200315160154.10292-1-sergio.paracuellos@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The clock which has been used here is not about the phy but the pcie port.
It has been properly handled into host pcie driver code. Hence, remove it
from here which is the correct thing to do.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Instead of using writel and readl use regmap API which makes
the driver maintainability easier.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Depending on revision of the chip, 'mt7621_bypass_pipe_rst' function
must be executed. Add better support for this using 'soc_device_match'
in driver probe function.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Device tree is not using child nodes anymore so the 'child_np' variable
can safely removed. This also simplifies the error path to be able to
directly return errors removing also the 'ret' variable.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Driver is using 'of_address_to_resource' to get memory resources.
Make use of 'platform_get_resource' instead which is more accurate
for a platform driver. This also makes possible to delete a local
variable which is not needed anymore.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Do not use uninitialized variable 'port' when printing an error message
Signed-off-by: Antti Keränen <detegr@gmail.com>
Reviewed-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
There are a few remaining drivers/staging/*/Makefile files that do not
have SPDX identifiers in them. Add the correct GPL-2.0 identifier to
them to make scanning tools happy.
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
There are a few remaining drivers/staging/*/Kconfig files that do not
have SPDX identifiers in them. Add the correct GPL-2.0 identifier to
them to make scanning tools happy.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Device tree has been simplified to don't use child nodes and use
the #phy-cells property instead. Change the driver accordly implementing
custom 'xlate' function to return the correct phy for each port.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Device tree has been simplified to use phy-cells instead of
using child nodes. Update documentation accordly.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Init driver as 'arch_initcall()' does not work. It causes phy_create()
to be called before the phy module is initialized, so 'phy_class' is NULL,
the new phy isn't placed in the right class, and it cannot be found.
Change to 'module_init()' which works properly in this case.
Fixes: 00981d31d6: staging: mt7621-pci-phy: add new driver for phy part of mt7621-pci
Reported-by: NeilBrown <neil@brown.name>
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
These drivers can be useful on other MT76xx SoCs, which have compatible
peripherals. The drivers were selectable in Kconfig, but they were
quietly excluded from the build because the SOC_MT7621 chip was not
selected. So, make the Makefiles use the same flags as Kconfig for
these drivers.
mt7621-dma and mt7621-dts are left alone because they truly do require
that SoC.
I have personally confirmed that the mt7621-spi driver works on the
MT7688, which was what prompted this change.
Cc: linux-kernel@vger.kernel.org
Cc: devel@driverdev.osuosl.org
Cc: NeilBrown <neil@brown.name>
Cc: sergio.paracuellos@gmail.com
Signed-off-by: George Hilliard <thirtythreeforty@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add bindings documentation for PCie PHY of Mediatek MT7621.
This file will be moved into its appropiate documentation bindings'place
when this driver is mainlined.
CC: Device Tree mailing list <devicetree@vger.kernel.org>
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Phy part of the pci for this SoC can be handled using a generic phy
driver. This commit extracts phy part of the mt7621-pci into a new
'mt7621-pci-phy' driver.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
