phy: qualcomm: phy-qcom-eusb2-repeater: fix override properties

[PATCH] phy: qualcomm: phy-qcom-eusb2-repeater: fix override properties

Posted by Pengyu Luo 1 month, 3 weeks ago

property "qcom,tune-usb2-preem" is for EUSB2_TUNE_USB2_PREEM
property "qcom,tune-usb2-amplitude" is for EUSB2_TUNE_IUSB2

The downstream correspondence is as follows:
EUSB2_TUNE_USB2_PREEM: Tx pre-emphasis tuning
EUSB2_TUNE_IUSB2: HS trasmit amplitude
EUSB2_TUNE_SQUELCH_U: Squelch detection threshold
EUSB2_TUNE_HSDISC: HS disconnect threshold
EUSB2_TUNE_EUSB_SLEW: slew rate

Fixes: 31bc94de7602 ("phy: qualcomm: phy-qcom-eusb2-repeater: Don't zero-out registers")
Signed-off-by: Pengyu Luo <mitltlatltl@gmail.com>
---
 drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c b/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
index d7493c229..3709fba42 100644
--- a/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
+++ b/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
@@ -127,13 +127,13 @@ static int eusb2_repeater_init(struct phy *phy)
 			     rptr->cfg->init_tbl[i].value);
 
 	/* Override registers from devicetree values */
-	if (!of_property_read_u8(np, "qcom,tune-usb2-amplitude", &val))
+	if (!of_property_read_u8(np, "qcom,tune-usb2-preem", &val))
 		regmap_write(regmap, base + EUSB2_TUNE_USB2_PREEM, val);
 
 	if (!of_property_read_u8(np, "qcom,tune-usb2-disc-thres", &val))
 		regmap_write(regmap, base + EUSB2_TUNE_HSDISC, val);
 
-	if (!of_property_read_u8(np, "qcom,tune-usb2-preem", &val))
+	if (!of_property_read_u8(np, "qcom,tune-usb2-amplitude", &val))
 		regmap_write(regmap, base + EUSB2_TUNE_IUSB2, val);
 
 	/* Wait for status OK */
-- 
2.50.1

Re: [PATCH] phy: qualcomm: phy-qcom-eusb2-repeater: fix override properties

Posted by Vinod Koul 1 month, 3 weeks ago

On Tue, 12 Aug 2025 17:39:56 +0800, Pengyu Luo wrote:
> property "qcom,tune-usb2-preem" is for EUSB2_TUNE_USB2_PREEM
> property "qcom,tune-usb2-amplitude" is for EUSB2_TUNE_IUSB2
> 
> The downstream correspondence is as follows:
> EUSB2_TUNE_USB2_PREEM: Tx pre-emphasis tuning
> EUSB2_TUNE_IUSB2: HS trasmit amplitude
> EUSB2_TUNE_SQUELCH_U: Squelch detection threshold
> EUSB2_TUNE_HSDISC: HS disconnect threshold
> EUSB2_TUNE_EUSB_SLEW: slew rate
> 
> [...]

Applied, thanks!

[1/1] phy: qualcomm: phy-qcom-eusb2-repeater: fix override properties
      commit: 942e47ab228c7dd27c2ae043c17e7aab2028082c

Best regards,
-- 
~Vinod

Re: [PATCH] phy: qualcomm: phy-qcom-eusb2-repeater: fix override properties

Posted by Luca Weiss 1 month, 3 weeks ago

On Tue Aug 12, 2025 at 11:39 AM CEST, Pengyu Luo wrote:
> property "qcom,tune-usb2-preem" is for EUSB2_TUNE_USB2_PREEM
> property "qcom,tune-usb2-amplitude" is for EUSB2_TUNE_IUSB2
>
> The downstream correspondence is as follows:
> EUSB2_TUNE_USB2_PREEM: Tx pre-emphasis tuning
> EUSB2_TUNE_IUSB2: HS trasmit amplitude
> EUSB2_TUNE_SQUELCH_U: Squelch detection threshold
> EUSB2_TUNE_HSDISC: HS disconnect threshold
> EUSB2_TUNE_EUSB_SLEW: slew rate
>
> Fixes: 31bc94de7602 ("phy: qualcomm: phy-qcom-eusb2-repeater: Don't zero-out registers")

Oh, not sure how this happened. Thanks for catching this, I do see the
problem in my original commit.

Reviewed-by: Luca Weiss <luca.weiss@fairphone.com>

Regards
Luca

> Signed-off-by: Pengyu Luo <mitltlatltl@gmail.com>
> ---
>  drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c b/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
> index d7493c229..3709fba42 100644
> --- a/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
> +++ b/drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c
> @@ -127,13 +127,13 @@ static int eusb2_repeater_init(struct phy *phy)
>  			     rptr->cfg->init_tbl[i].value);
>  
>  	/* Override registers from devicetree values */
> -	if (!of_property_read_u8(np, "qcom,tune-usb2-amplitude", &val))
> +	if (!of_property_read_u8(np, "qcom,tune-usb2-preem", &val))
>  		regmap_write(regmap, base + EUSB2_TUNE_USB2_PREEM, val);
>  
>  	if (!of_property_read_u8(np, "qcom,tune-usb2-disc-thres", &val))
>  		regmap_write(regmap, base + EUSB2_TUNE_HSDISC, val);
>  
> -	if (!of_property_read_u8(np, "qcom,tune-usb2-preem", &val))
> +	if (!of_property_read_u8(np, "qcom,tune-usb2-amplitude", &val))
>  		regmap_write(regmap, base + EUSB2_TUNE_IUSB2, val);
>  
>  	/* Wait for status OK */

Re: [PATCH] phy: qualcomm: phy-qcom-eusb2-repeater: fix override properties

Posted by Konrad Dybcio 1 month, 3 weeks ago

On 8/12/25 11:39 AM, Pengyu Luo wrote:
> property "qcom,tune-usb2-preem" is for EUSB2_TUNE_USB2_PREEM
> property "qcom,tune-usb2-amplitude" is for EUSB2_TUNE_IUSB2
> 
> The downstream correspondence is as follows:
> EUSB2_TUNE_USB2_PREEM: Tx pre-emphasis tuning
> EUSB2_TUNE_IUSB2: HS trasmit amplitude
> EUSB2_TUNE_SQUELCH_U: Squelch detection threshold
> EUSB2_TUNE_HSDISC: HS disconnect threshold
> EUSB2_TUNE_EUSB_SLEW: slew rate

The commit message is a bit.. dry.. but I suppose it conveys what
the problem is
> 
> Fixes: 31bc94de7602 ("phy: qualcomm: phy-qcom-eusb2-repeater: Don't zero-out registers")
> Signed-off-by: Pengyu Luo <mitltlatltl@gmail.com>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad