Linux kernel commit 90c2d2eb7ab5 ("MIPS: pci: lantiq: switch to using
gpiod API") not only switched to the gpiod API, but also inverted /
changed the polarity of the GPIO.
According to the PCI specification, the RST# pin is an active-low
signal. However, most of the device trees that have been widely used for
a long time (mainly in the openWrt project) define this GPIO as
active-high and the old driver code inverted the signal internally.
Apparently there are actually boards where the reset gpio must be
operated inverted. For this reason, we cannot use the GPIOD_OUT_LOW/HIGH
flag for initialization. Instead, we must explicitly set the gpio to
value 1 in order to take into account any "GPIO_ACTIVE_LOW" flag that
may have been set.
In order to remain compatible with all these existing device trees, we
should therefore keep the logic as it was before the commit.
Signed-off-by: Martin Schiller <ms@dev.tdt.de>
This is required for linux-6.1 compatibility.
IRQs are not automatically mapped from HW to virtual IRQ numbers when
the IRQ domain is registered. This happens when the IRQ number is read
from the device tree based on the IRQ domain from the device tree now.
In kernel 5.15 it was done when the IRQ domain was registered.
Signed-off-by: Martin Schiller <ms@dev.tdt.de>
This is required for linux-6.1 compatibility.
IRQs are not automatically mapped from HW to virtual IRQ numbers when
the IRQ domain is registered. This happens when the IRQ number is read
from the device tree based on the IRQ domain from the device tree now.
In kernel 5.15 it was done when the IRQ domain was registered.
Signed-off-by: Martin Schiller <ms@dev.tdt.de>
This is required for linux-6.1 compatibility.
IRQs are not automatically mapped from HW to virtual IRQ numbers when
the IRQ domain is registered. This happens when the IRQ number is read
from the device tree based on the IRQ domain from the device tree now.
In kernel 5.15 it was done when the IRQ domain was registered.
Signed-off-by: Martin Schiller <ms@dev.tdt.de>
Use dev_err_probe() to get rid of the following warning which is
seen when the PCIe PHY has not been probed yet:
pcie-xrx200 1d900000.pcie: failed to get the PCIe PHY
Signed-off-by: Martin Schiller <ms@dev.tdt.de>
This backports some patches for the gswip switch driver.
I copied them from this repository:
https://github.com/xdarklight/linux/commits/lantiq-gswip-integration-20221022
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
[drop some patches which may break functionality at the moment]
Signed-off-by: Martin Schiller <ms@dev.tdt.de>
If the reverted timer driver fails to allocate interrupts handle the
error better.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
[moved printk before the cleanup for-loop]
Signed-off-by: Martin Schiller <ms@dev.tdt.de>
Make all the patches apply and delete the ones already integrated into
upstream Linux kernel. This also refreshes some of the kernel
configurations.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
[refreshed for linux 6.1.89]
Signed-off-by: Martin Schiller <ms@dev.tdt.de>
