Commit e75d564f authored by Xu Yang's avatar Xu Yang Committed by Vinod Koul
Browse files

phy: fsl-imx8mq-usb: add i.MX95 tuning support 



The i.MX8MP and i.MX95 USB3 PHY have different tuning parameter for same
tuning field, this will add i.MX95 tuning support.

Reviewed-by: default avatarJun Li <jun.li@nxp.com>
Signed-off-by: default avatarXu Yang <xu.yang_2@nxp.com>
Link: https://lore.kernel.org/r/20250430094502.2723983-4-xu.yang_2@nxp.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent b15ee09d

drivers/phy/freescale/phy-fsl-imx8mq-usb.c

+74 −0
Original line number Diff line number Diff line
@@ -293,6 +293,28 @@ static u32 phy_tx_vref_tune_from_property(u32 percent) 
	return DIV_ROUND_CLOSEST(percent - 94U, 2);

}



static u32 imx95_phy_tx_vref_tune_from_property(u32 percent)

{

	percent = clamp(percent, 90U, 108U);



	switch (percent) {

	case 90 ... 91:

		percent = 0;

		break;

	case 92 ... 96:

		percent -= 91;

		break;

	case 97 ... 104:

		percent -= 92;

		break;

	case 105 ... 108:

		percent -= 93;

		break;

	}



	return percent;

}



static u32 phy_tx_rise_tune_from_property(u32 percent)

{

	switch (percent) {
@@ -307,6 +329,22 @@ static u32 phy_tx_rise_tune_from_property(u32 percent) 
	}

}



static u32 imx95_phy_tx_rise_tune_from_property(u32 percent)

{

	percent = clamp(percent, 90U, 120U);



	switch (percent) {

	case 90 ... 99:

		return 3;

	case 101 ... 115:

		return 1;

	case 116 ... 120:

		return 0;

	default:

		return 2;

	}

}



static u32 phy_tx_preemp_amp_tune_from_property(u32 microamp)

{

	microamp = min(microamp, 1800U);
@@ -352,6 +390,29 @@ static u32 phy_comp_dis_tune_from_property(u32 percent) 
		return 7;

	}

}



static u32 imx95_phy_comp_dis_tune_from_property(u32 percent)

{

	percent = clamp(percent, 94, 104);



	switch (percent) {

	case 94 ... 95:

		percent = 0;

		break;

	case 96 ... 98:

		percent -= 95;

		break;

	case 99 ... 102:

		percent -= 96;

		break;

	case 103 ... 104:

		percent -= 97;

		break;

	}



	return percent;

}



static u32 phy_pcs_tx_swing_full_from_property(u32 percent)

{

	percent = min(percent, 100U);
@@ -362,10 +423,17 @@ static u32 phy_pcs_tx_swing_full_from_property(u32 percent) 
static void imx8m_get_phy_tuning_data(struct imx8mq_usb_phy *imx_phy)

{

	struct device *dev = imx_phy->phy->dev.parent;

	bool is_imx95 = false;



	if (device_is_compatible(dev, "fsl,imx95-usb-phy"))

		is_imx95 = true;



	if (device_property_read_u32(dev, "fsl,phy-tx-vref-tune-percent",

				     &imx_phy->tx_vref_tune))

		imx_phy->tx_vref_tune = PHY_TUNE_DEFAULT;

	else if (is_imx95)

		imx_phy->tx_vref_tune =

			imx95_phy_tx_vref_tune_from_property(imx_phy->tx_vref_tune);

	else

		imx_phy->tx_vref_tune =

			phy_tx_vref_tune_from_property(imx_phy->tx_vref_tune);
@@ -373,6 +441,9 @@ static void imx8m_get_phy_tuning_data(struct imx8mq_usb_phy *imx_phy) 
	if (device_property_read_u32(dev, "fsl,phy-tx-rise-tune-percent",

				     &imx_phy->tx_rise_tune))

		imx_phy->tx_rise_tune = PHY_TUNE_DEFAULT;

	else if (is_imx95)

		imx_phy->tx_rise_tune =

			imx95_phy_tx_rise_tune_from_property(imx_phy->tx_rise_tune);

	else

		imx_phy->tx_rise_tune =

			phy_tx_rise_tune_from_property(imx_phy->tx_rise_tune);
@@ -394,6 +465,9 @@ static void imx8m_get_phy_tuning_data(struct imx8mq_usb_phy *imx_phy) 
	if (device_property_read_u32(dev, "fsl,phy-comp-dis-tune-percent",

				     &imx_phy->comp_dis_tune))

		imx_phy->comp_dis_tune = PHY_TUNE_DEFAULT;

	else if (is_imx95)

		imx_phy->comp_dis_tune =

			imx95_phy_comp_dis_tune_from_property(imx_phy->comp_dis_tune);

	else

		imx_phy->comp_dis_tune =

			phy_comp_dis_tune_from_property(imx_phy->comp_dis_tune);