The series aims to skip phy register programming and drive PCIe PHY with register setting programmed in bootloader by simply toggling no_csr reset, which once togglled, PHY hardware will be reset while PHY registers are retained. First, determine whether PHY setting can be skipped by checking QPHY_START_CTRL register and the existence of nocsr reset. If it is programmed and no_csr reset is supported, do no_csr reset and skip BCR reset which will reset entire PHY. This series also remove has_nocsr_reset flag in qmp_phy_cfg structure and decide whether the PHY supports nocsr reset by checking the existence of nocsr reset in device tree. The series are tested on X1E80100-QCP and HDK8550. Wenbin Yao (2): phy: qcom: pcie: Determine has_nocsr_reset dynamically phy: qcom: qmp-pcie: Add PHY register retention support drivers/phy/qualcomm/phy-qcom-qmp-pcie.c | 109 ++++++++++++++--------- 1 file changed, 65 insertions(+), 44 deletions(-) base-commit: bcf2acd8f64b0a5783deeeb5fd70c6163ec5acd7 -- 2.34.1
