Re: [PATCH v5 5/9] ppc/pnv: Wire up pca9552 GPIO pins for PCIe hotplug power control

2023-11-24 Thread Cédric Le Goater
On 11/21/23 20:09, Glenn Miles wrote: For power10-rainier, a pca9552 device is used for PCIe slot hotplug power control by the Power Hypervisor code. The code expects that some time after it enables power to a PCIe slot by asserting one of the pca9552 GPIO pins 0-4, it should see a "power good"

[PATCH v5 5/9] ppc/pnv: Wire up pca9552 GPIO pins for PCIe hotplug power control

2023-11-21 Thread Glenn Miles
For power10-rainier, a pca9552 device is used for PCIe slot hotplug power control by the Power Hypervisor code. The code expects that some time after it enables power to a PCIe slot by asserting one of the pca9552 GPIO pins 0-4, it should see a "power good" signal asserted on one of pca9552 GPIO