[PATCH v4 5/6] PCI: mediatek-gen3: Add reset delay in mtk_pcie_en7581_power_up()

[Stephen Boyd]

Quoting Lorenzo Bianconi (2024-11-18 00:04:57)
> Airoha EN7581 has a hw bug asserting/releasing PCIE_PE_RSTB signal
> causing occasional PCIe link down issues. In order to overcome the
> problem, PCIe block is reset using REG_PCI_CONTROL (0x88) and
> REG_RESET_CONTROL (0x834) registers available in the clock module
> running clk_bulk_prepare_enable in mtk_pcie_en7581_power_up().
> In order to make the code more readable, move the wait for the time
> needed to complete the PCIe reset from en7581_pci_enable() to
> mtk_pcie_en7581_power_up().
> Reduce reset timeout from 250ms to PCIE_T_PVPERL_MS (100ms).
> 
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
> Signed-off-by: Lorenzo Bianconi <lorenzo at kernel.org>
> ---

Acked-by: Stephen Boyd <sboyd at kernel.org>