This was supposed to only update ti-pipe3 PHY registers. However because of the way the ti-pipe3 PHY, OCP2SCP and PCIe controller are connected in dra7xx where PCIe controller --------------> ti-pipe3 PHY --------------> OCP2SCP depends on depends on updating ti-pipe3 PHY registers results in an abort. Though the dependency between ti-pipe3 PHY and OCP2SCP is created (OCP2SCP is parent of ti-pipe3 PHY), and enabling ti-pipe3 PHY clocks should in turn enable OCP2SCP (with the help of pm_runtime framework), this doesn't work in no_irq stage since pm_runtime is disabled during no_irq stage. Since pci-dra7xx enables/initializes ti-pipe3 phy in no_irq stage, OCP2SCP is not enabled resulting in an abort with ti-pipe3 PHY registers are accessed. In order to solve this a functional dependency is created between PCIe and ti-pipe3 PHY so that PCIe is suspended before PHY/OCP2SCP and resumed after PCIe PHY/OCP2SCP Kishon Vijay Abraham I (2): PCI: dwc: dra7xx: Create functional dependency between PCIe and PHY phy: ti-pipe3: Update pcie phy settings drivers/pci/dwc/pci-dra7xx.c | 16 +++++++ drivers/phy/ti/phy-ti-pipe3.c | 101 +++++++++++++++++++++++++++++++++++++++++- 2 files changed, 116 insertions(+), 1 deletion(-) -- 2.11.0
