[v2] net: stmmac: dwmac-qcom-ethqos: Update link clock rate only for RGMII

[PATCH net-next v2] net: stmmac: dwmac-qcom-ethqos: Update link clock rate only for RGMII

Posted by Sarosh Hasan 1 year, 11 months ago

Updating link clock rate for different speeds is only needed when
using RGMII, as that mode requires changing clock speed when the link
speed changes. Let's restrict updating the link clock speed in
ethqos_update_link_clk() to just RGMII. Other modes such as SGMII
only need to enable the link clock (which is already done in probe).

Signed-off-by: Sarosh Hasan <quic_sarohasa@quicinc.com>
---
v2 changelog:
- Addressed Konrad Dybcio comment on optimizing the patch
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index 31631e3f89d0..c182294a6515 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -169,6 +169,9 @@ static void rgmii_dump(void *priv)
 static void
 ethqos_update_link_clk(struct qcom_ethqos *ethqos, unsigned int speed)
 {
+	if (!phy_interface_mode_is_rgmii(ethqos->phy_mode))
+		return;
+
 	switch (speed) {
 	case SPEED_1000:
 		ethqos->link_clk_rate =  RGMII_1000_NOM_CLK_FREQ;
-- 
2.17.1

Re: [PATCH net-next v2] net: stmmac: dwmac-qcom-ethqos: Update link clock rate only for RGMII

Posted by Abhishek Chauhan (ABC) 1 year, 11 months ago


On 2/26/2024 1:42 AM, Sarosh Hasan wrote:
> Updating link clock rate for different speeds is only needed when
> using RGMII, as that mode requires changing clock speed when the link
> speed changes. Let's restrict updating the link clock speed in
> ethqos_update_link_clk() to just RGMII. Other modes such as SGMII
> only need to enable the link clock (which is already done in probe).
> 
> Signed-off-by: Sarosh Hasan <quic_sarohasa@quicinc.com>
Reviewed-by: Abhishek Chauhan <quic_abchauha@quicinc.com>

> ---
> v2 changelog:
> - Addressed Konrad Dybcio comment on optimizing the patch
> ---
>  drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> index 31631e3f89d0..c182294a6515 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> @@ -169,6 +169,9 @@ static void rgmii_dump(void *priv)
>  static void
>  ethqos_update_link_clk(struct qcom_ethqos *ethqos, unsigned int speed)
>  {
> +	if (!phy_interface_mode_is_rgmii(ethqos->phy_mode))
> +		return;
> +
>  	switch (speed) {
>  	case SPEED_1000:
>  		ethqos->link_clk_rate =  RGMII_1000_NOM_CLK_FREQ;

Re: [PATCH net-next v2] net: stmmac: dwmac-qcom-ethqos: Update link clock rate only for RGMII

Posted by Andrew Halaney 1 year, 11 months ago

On Mon, Feb 26, 2024 at 03:12:26PM +0530, Sarosh Hasan wrote:
> Updating link clock rate for different speeds is only needed when
> using RGMII, as that mode requires changing clock speed when the link
> speed changes. Let's restrict updating the link clock speed in
> ethqos_update_link_clk() to just RGMII. Other modes such as SGMII
> only need to enable the link clock (which is already done in probe).
> 
> Signed-off-by: Sarosh Hasan <quic_sarohasa@quicinc.com>

Reviewed-by: Andrew Halaney <ahalaney@redhat.com>
Tested-by: Andrew Halaney <ahalaney@redhat.com> # sa8775p-ride

> ---
> v2 changelog:
> - Addressed Konrad Dybcio comment on optimizing the patch
> ---
>  drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> index 31631e3f89d0..c182294a6515 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> @@ -169,6 +169,9 @@ static void rgmii_dump(void *priv)
>  static void
>  ethqos_update_link_clk(struct qcom_ethqos *ethqos, unsigned int speed)
>  {
> +	if (!phy_interface_mode_is_rgmii(ethqos->phy_mode))
> +		return;
> +
>  	switch (speed) {
>  	case SPEED_1000:
>  		ethqos->link_clk_rate =  RGMII_1000_NOM_CLK_FREQ;
> -- 
> 2.17.1
>

Re: [PATCH net-next v2] net: stmmac: dwmac-qcom-ethqos: Update link clock rate only for RGMII

Posted by Andrew Lunn 1 year, 11 months ago

On Mon, Feb 26, 2024 at 03:12:26PM +0530, Sarosh Hasan wrote:
> Updating link clock rate for different speeds is only needed when
> using RGMII, as that mode requires changing clock speed when the link
> speed changes. Let's restrict updating the link clock speed in
> ethqos_update_link_clk() to just RGMII. Other modes such as SGMII
> only need to enable the link clock (which is already done in probe).
> 
> Signed-off-by: Sarosh Hasan <quic_sarohasa@quicinc.com>

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew