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| author | Konrad Dybcio <konrad.dybcio@linaro.org> | 2023-09-13 11:53:26 +0200 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-09-21 16:38:51 +0200 |
| commit | 56156a76e765d32009fee058697c591194d0829f (patch) | |
| tree | e376a88194217938569bc8527a58d4d74f7b66fe /drivers/phy | |
| parent | 99a517a582fc1272d1d3cf3b9e671a14d7db77b8 (diff) | |
| download | lwn-56156a76e765d32009fee058697c591194d0829f.tar.gz lwn-56156a76e765d32009fee058697c591194d0829f.zip | |
phy: qualcomm: phy-qcom-eusb2-repeater: Add tuning overrides
There are devices in the wild, like the Sony Xperia 1 V that *require*
different tuning than the base design for USB to work.
Add support for overriding the necessary tuning values.
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230830-topic-eusb2_override-v2-4-7d8c893d93f6@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/phy')
| -rw-r--r-- | drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c b/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c index d4fb85c20eb0..a623f092b11f 100644 --- a/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c +++ b/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c @@ -142,7 +142,9 @@ static int eusb2_repeater_init(struct phy *phy) { struct reg_field *regfields = eusb2_repeater_tune_reg_fields; struct eusb2_repeater *rptr = phy_get_drvdata(phy); - const u32 *init_tbl = rptr->cfg->init_tbl; + struct device_node *np = rptr->dev->of_node; + u32 init_tbl[F_NUM_TUNE_FIELDS] = { 0 }; + u8 override; u32 val; int ret; int i; @@ -163,6 +165,19 @@ static int eusb2_repeater_init(struct phy *phy) regmap_field_update_bits(rptr->regs[i], mask, 0); } } + memcpy(init_tbl, rptr->cfg->init_tbl, sizeof(init_tbl)); + + if (!of_property_read_u8(np, "qcom,tune-usb2-amplitude", &override)) + init_tbl[F_TUNE_IUSB2] = override; + + if (!of_property_read_u8(np, "qcom,tune-usb2-disc-thres", &override)) + init_tbl[F_TUNE_HSDISC] = override; + + if (!of_property_read_u8(np, "qcom,tune-usb2-preem", &override)) + init_tbl[F_TUNE_USB2_PREEM] = override; + + for (i = 0; i < F_NUM_TUNE_FIELDS; i++) + regmap_field_update_bits(rptr->regs[i], init_tbl[i], init_tbl[i]); ret = regmap_field_read_poll_timeout(rptr->regs[F_RPTR_STATUS], val, val & RPTR_OK, 10, 5); |