FROMLIST: PCI: qcom: Add .get_ltssm() helper#724
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For older targets like sc7280, we see reading DBI after sending PME turn off message is causing NOC error. To avoid unsafe DBI accesses, introduce qcom_pcie_get_ltssm(), which retrieves the LTSSM state from the PARF_LTSSM register instead. Link: https://lore.kernel.org/r/20260217-d3cold-v2-3-89b322864043@oss.qualcomm.com Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
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For older targets like sc7280, we see reading DBI after sending PME turn off message is causing NOC error.
To avoid unsafe DBI accesses, introduce qcom_pcie_get_ltssm(), which retrieves the LTSSM state from the PARF_LTSSM register instead.
Link: https://lore.kernel.org/r/20260217-d3cold-v2-3-89b322864043@oss.qualcomm.com