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phy: qualcomm: phy-qcom-eusb2-repeater: Add tuning overrides

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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>
This commit is contained in:
Konrad Dybcio 2023-09-13 11:53:26 +02:00 committed by Vinod Koul
parent 99a517a582
commit 56156a76e7
1 changed files with 16 additions and 1 deletions
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17
drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
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@ -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);