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phy: qcom-qmp-pcie: drop bogus register update 

Since commit 0d58280cf1 ("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: e4d8b05ad5 ("phy: qcom-qmp: Use proper PWRDOWN offset for sm8150 USB") added support
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> #RB3
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20221017065013.19647-12-johan+linaro@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Johan Hovold 2022-10-17 08:50:13 +02:00 committed by Vinod Koul
parent 5b76f5ec63
commit 2d93887cb4
1 changed files with 0 additions and 6 deletions
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6
drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
View File

@ -2061,12 +2061,6 @@ static int qmp_pcie_power_on(struct phy *phy)
qmp_pcie_pcs_init(qphy, &cfg->tables);
qmp_pcie_pcs_init(qphy, mode_tables);
/*
* 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);