This is a note to let you know that I've just added the patch titled
phy: qcom-qmp-pcie: drop bogus register update
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
phy-qcom-qmp-pcie-drop-bogus-register-update.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 98840539aa9eb1dce39c3f494f91b5852473d41f
Author: Johan Hovold <johan+linaro@xxxxxxxxxx>
Date: Mon Oct 17 08:50:13 2022 +0200
phy: qcom-qmp-pcie: drop bogus register update
[ Upstream commit 2d93887cb4bac0a36ce9e146956f631ab7994680 ]
Since commit 0d58280cf1e6 ("phy: Update PHY power control sequence") the
PHY is powered on before configuring the registers and only the MSM8996
PCIe PHY, which includes the POWER_DOWN_CONTROL register in its PCS
initialisation table, may possibly require a second update afterwards.
To make things worse, the POWER_DOWN_CONTROL register lies at a
different offset on more recent SoCs so that the second update, which
still used a hard-coded offset, would write to an unrelated register
(e.g. a revision-id register on SC8280XP).
As the MSM8996 PCIe PHY is now handled by a separate driver, simply drop
the bogus register update.
Fixes: e4d8b05ad5f9 ("phy: qcom-qmp: Use proper PWRDOWN offset for sm8150 USB") added support
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> #RB3
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221017065013.19647-12-johan+linaro@xxxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
index 2d65e1f56bfc..6d790f2107f5 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
@@ -2077,12 +2077,6 @@ static int qcom_qmp_phy_pcie_power_on(struct phy *phy)
qcom_qmp_phy_pcie_configure(pcs_misc, cfg->regs, cfg->pcs_misc_tbl_sec,
cfg->pcs_misc_tbl_num_sec);
- /*
- * Pull out PHY from POWER DOWN state.
- * This is active low enable signal to power-down PHY.
- */
- qphy_setbits(pcs, QPHY_V2_PCS_POWER_DOWN_CONTROL, cfg->pwrdn_ctrl);
-
if (cfg->has_pwrdn_delay)
usleep_range(cfg->pwrdn_delay_min, cfg->pwrdn_delay_max);
