On 2/27/2025 9:29 AM, Manivannan Sadhasivam wrote:
On Thu, Feb 27, 2025 at 09:27:47AM +0530, Manivannan Sadhasivam wrote:
On Tue, Feb 25, 2025 at 03:03:57PM +0530, Krishna Chaitanya Chundru wrote:
TC956x is the PCIe switch which has one upstream and three downstream
ports. To one of the downstream ports ethernet MAC is connected as endpoint
device. Other two downstream ports are supposed to connect to external
device. One Host can connect to TC956x by upstream port.
TC956x switch power is controlled by the GPIO's. After powering on
the switch will immediately participate in the link training. if the
host is also ready by that time PCIe link will established.
The TC956x needs to configured certain parameters like de-emphasis,
disable unused port etc before link is established.
As the controller starts link training before the probe of pwrctl driver,
the PCIe link may come up as soon as we power on the switch. Due to this
configuring the switch itself through i2c will not have any effect as
this configuration needs to done before link training. To avoid this
introduce two functions in pci_ops to start_link() & stop_link() which
will disable the link training if the PCIe link is not up yet.
Enable global IRQ for PCIe controller so that recan can happen when
link was up through global IRQ.
Move these patches to a separate series.
Or you can just drop them. I have a series that adds global IRQ to most of the
SoCs and sc7280 is one of them.
- Mani
fine for me, I will drop.
- Krishna Chaitanya.
