[PATCH V1 net-next 0/5] net: fec: add support for i.MX8MQ and i.MX8QM

[PATCH V1 net-next 0/5] net: fec: add support for i.MX8MQ and i.MX8QM

[Joakim Zhang]

This patch set adds supports for i.MX8MQ and i.MX8QM, both of them extend new features.

Fugang Duan (5):
  dt-bindings: fec: add the missing clocks properties
  dt-bindings: fec: add RGMII delayed clock property
  net: fec: add imx8mq and imx8qm new versions support
  net: fec: add eee mode tx lpi support
  net: fec: add MAC internal delayed clock feature support

 .../devicetree/bindings/net/fsl-fec.txt       |  15 ++
 drivers/net/ethernet/freescale/fec.h          |  25 +++
 drivers/net/ethernet/freescale/fec_main.c     | 145 ++++++++++++++++++
 3 files changed, 185 insertions(+)

-- 
2.17.1

[PATCH V1 net-next 1/5] dt-bindings: fec: add the missing clocks properties

[Joakim Zhang]

From: Fugang Duan <fugang.duan@nxp.com>

Both driver and dts have already used these clocks properties, so add the
missing clocks info.

Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
---
 Documentation/devicetree/bindings/net/fsl-fec.txt | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/fsl-fec.txt b/Documentation/devicetree/bindings/net/fsl-fec.txt
index 9b543789cd52..6754be1b91c4 100644
--- a/Documentation/devicetree/bindings/net/fsl-fec.txt
+++ b/Documentation/devicetree/bindings/net/fsl-fec.txt
@@ -39,6 +39,17 @@ Optional properties:
   tx/rx queues 1 and 2. "int0" will be used for queue 0 and ENET_MII interrupts.
   For imx6sx, "int0" handles all 3 queues and ENET_MII. "pps" is for the pulse
   per second interrupt associated with 1588 precision time protocol(PTP).
+- clocks: Phandles to input clocks.
+- clock-name: Should be the names of the clocks
+  - "ipg", for MAC ipg_clk_s, ipg_clk_mac_s that are for register accessing.
+  - "ahb", for MAC ipg_clk, ipg_clk_mac that are bus clock.
+  - "ptp"(option), for IEEE1588 timer clock that requires the clock.
+  - "enet_clk_ref"(option), for MAC transmit/receiver reference clock like
+    RGMII TXC clock or RMII reference clock. It depends on board design,
+    the clock is required if RGMII TXC and RMII reference clock source from
+    SOC internal PLL.
+  - "enet_out"(option), output clock for external device, like supply clock
+    for PHY. The clock is required if PHY clock source from SOC.
 
 Optional subnodes:
 - mdio : specifies the mdio bus in the FEC, used as a container for phy nodes
-- 
2.17.1

Re: [PATCH V1 net-next 1/5] dt-bindings: fec: add the missing clocks properties

[Rob Herring]

On Fri, Jul 09, 2021 at 04:18:19PM +0800, Joakim Zhang wrote:
> From: Fugang Duan <fugang.duan@nxp.com>
> 
> Both driver and dts have already used these clocks properties, so add the
> missing clocks info.
> 
> Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
> Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
> ---
>  Documentation/devicetree/bindings/net/fsl-fec.txt | 11 +++++++++++
>  1 file changed, 11 insertions(+)

There's enough changes in this series, please convert this to schema.

> 
> diff --git a/Documentation/devicetree/bindings/net/fsl-fec.txt b/Documentation/devicetree/bindings/net/fsl-fec.txt
> index 9b543789cd52..6754be1b91c4 100644
> --- a/Documentation/devicetree/bindings/net/fsl-fec.txt
> +++ b/Documentation/devicetree/bindings/net/fsl-fec.txt
> @@ -39,6 +39,17 @@ Optional properties:
>    tx/rx queues 1 and 2. "int0" will be used for queue 0 and ENET_MII interrupts.
>    For imx6sx, "int0" handles all 3 queues and ENET_MII. "pps" is for the pulse
>    per second interrupt associated with 1588 precision time protocol(PTP).
> +- clocks: Phandles to input clocks.
> +- clock-name: Should be the names of the clocks
> +  - "ipg", for MAC ipg_clk_s, ipg_clk_mac_s that are for register accessing.
> +  - "ahb", for MAC ipg_clk, ipg_clk_mac that are bus clock.
> +  - "ptp"(option), for IEEE1588 timer clock that requires the clock.
> +  - "enet_clk_ref"(option), for MAC transmit/receiver reference clock like
> +    RGMII TXC clock or RMII reference clock. It depends on board design,
> +    the clock is required if RGMII TXC and RMII reference clock source from
> +    SOC internal PLL.
> +  - "enet_out"(option), output clock for external device, like supply clock
> +    for PHY. The clock is required if PHY clock source from SOC.
>  
>  Optional subnodes:
>  - mdio : specifies the mdio bus in the FEC, used as a container for phy nodes
> -- 
> 2.17.1
> 
> 

RE: [PATCH V1 net-next 1/5] dt-bindings: fec: add the missing clocks properties

[Joakim Zhang]

> -----Original Message-----
> From: Rob Herring <robh@kernel.org>
> Sent: 2021年7月15日 7:19
> To: Joakim Zhang <qiangqing.zhang@nxp.com>
> Cc: davem@davemloft.net; kuba@kernel.org; andrew@lunn.ch;
> netdev@vger.kernel.org; devicetree@vger.kernel.org;
> linux-kernel@vger.kernel.org; dl-linux-imx <linux-imx@nxp.com>
> Subject: Re: [PATCH V1 net-next 1/5] dt-bindings: fec: add the missing clocks
> properties
> 
> On Fri, Jul 09, 2021 at 04:18:19PM +0800, Joakim Zhang wrote:
> > From: Fugang Duan <fugang.duan@nxp.com>
> >
> > Both driver and dts have already used these clocks properties, so add
> > the missing clocks info.
> >
> > Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
> > Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
> > ---
> >  Documentation/devicetree/bindings/net/fsl-fec.txt | 11 +++++++++++
> >  1 file changed, 11 insertions(+)
> 
> There's enough changes in this series, please convert this to schema.

Hi Rob,

Ok, I will first convert this binding into schema, then resend this patch set.

Best Regards,
Joakim Zhang
> >
> > diff --git a/Documentation/devicetree/bindings/net/fsl-fec.txt
> > b/Documentation/devicetree/bindings/net/fsl-fec.txt
> > index 9b543789cd52..6754be1b91c4 100644
> > --- a/Documentation/devicetree/bindings/net/fsl-fec.txt
> > +++ b/Documentation/devicetree/bindings/net/fsl-fec.txt
> > @@ -39,6 +39,17 @@ Optional properties:
> >    tx/rx queues 1 and 2. "int0" will be used for queue 0 and ENET_MII
> interrupts.
> >    For imx6sx, "int0" handles all 3 queues and ENET_MII. "pps" is for the
> pulse
> >    per second interrupt associated with 1588 precision time protocol(PTP).
> > +- clocks: Phandles to input clocks.
> > +- clock-name: Should be the names of the clocks
> > +  - "ipg", for MAC ipg_clk_s, ipg_clk_mac_s that are for register accessing.
> > +  - "ahb", for MAC ipg_clk, ipg_clk_mac that are bus clock.
> > +  - "ptp"(option), for IEEE1588 timer clock that requires the clock.
> > +  - "enet_clk_ref"(option), for MAC transmit/receiver reference clock like
> > +    RGMII TXC clock or RMII reference clock. It depends on board design,
> > +    the clock is required if RGMII TXC and RMII reference clock source from
> > +    SOC internal PLL.
> > +  - "enet_out"(option), output clock for external device, like supply clock
> > +    for PHY. The clock is required if PHY clock source from SOC.
> >
> >  Optional subnodes:
> >  - mdio : specifies the mdio bus in the FEC, used as a container for
> > phy nodes
> > --
> > 2.17.1
> >
> >

[PATCH V1 net-next 2/5] dt-bindings: fec: add RGMII delayed clock property

[Joakim Zhang]

From: Fugang Duan <fugang.duan@nxp.com>

Add property for RGMII delayed clock.

Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
---
 Documentation/devicetree/bindings/net/fsl-fec.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/fsl-fec.txt b/Documentation/devicetree/bindings/net/fsl-fec.txt
index 6754be1b91c4..f93b9552cfc5 100644
--- a/Documentation/devicetree/bindings/net/fsl-fec.txt
+++ b/Documentation/devicetree/bindings/net/fsl-fec.txt
@@ -50,6 +50,10 @@ Optional properties:
     SOC internal PLL.
   - "enet_out"(option), output clock for external device, like supply clock
     for PHY. The clock is required if PHY clock source from SOC.
+  - "enet_2x_txclk"(option), for RGMII sampleing clock which fixed at 250Mhz.
+    The clock is required if SOC RGMII enable clock delay.
+- fsl,rgmii_txc_dly: add RGMII TXC delayed clock from MAC.
+- fsl,rgmii_rxc_dly: add RGMII RXC delayed clock from MAC.
 
 Optional subnodes:
 - mdio : specifies the mdio bus in the FEC, used as a container for phy nodes
-- 
2.17.1

Re: [PATCH V1 net-next 2/5] dt-bindings: fec: add RGMII delayed clock property

[Rob Herring]

On Fri, Jul 09, 2021 at 04:18:20PM +0800, Joakim Zhang wrote:
> From: Fugang Duan <fugang.duan@nxp.com>
> 
> Add property for RGMII delayed clock.
> 
> Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
> Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
> ---
>  Documentation/devicetree/bindings/net/fsl-fec.txt | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/fsl-fec.txt b/Documentation/devicetree/bindings/net/fsl-fec.txt
> index 6754be1b91c4..f93b9552cfc5 100644
> --- a/Documentation/devicetree/bindings/net/fsl-fec.txt
> +++ b/Documentation/devicetree/bindings/net/fsl-fec.txt
> @@ -50,6 +50,10 @@ Optional properties:
>      SOC internal PLL.
>    - "enet_out"(option), output clock for external device, like supply clock
>      for PHY. The clock is required if PHY clock source from SOC.
> +  - "enet_2x_txclk"(option), for RGMII sampleing clock which fixed at 250Mhz.
> +    The clock is required if SOC RGMII enable clock delay.
> +- fsl,rgmii_txc_dly: add RGMII TXC delayed clock from MAC.
> +- fsl,rgmii_rxc_dly: add RGMII RXC delayed clock from MAC.

Don't we have standard properties for this?

>  
>  Optional subnodes:
>  - mdio : specifies the mdio bus in the FEC, used as a container for phy nodes
> -- 
> 2.17.1
> 
> 

Re: [PATCH V1 net-next 2/5] dt-bindings: fec: add RGMII delayed clock property

[Andrew Lunn]

On Wed, Jul 14, 2021 at 05:19:37PM -0600, Rob Herring wrote:
> On Fri, Jul 09, 2021 at 04:18:20PM +0800, Joakim Zhang wrote:
> > From: Fugang Duan <fugang.duan@nxp.com>
> > 
> > Add property for RGMII delayed clock.
> > 
> > Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
> > Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
> > ---
> >  Documentation/devicetree/bindings/net/fsl-fec.txt | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/net/fsl-fec.txt b/Documentation/devicetree/bindings/net/fsl-fec.txt
> > index 6754be1b91c4..f93b9552cfc5 100644
> > --- a/Documentation/devicetree/bindings/net/fsl-fec.txt
> > +++ b/Documentation/devicetree/bindings/net/fsl-fec.txt
> > @@ -50,6 +50,10 @@ Optional properties:
> >      SOC internal PLL.
> >    - "enet_out"(option), output clock for external device, like supply clock
> >      for PHY. The clock is required if PHY clock source from SOC.
> > +  - "enet_2x_txclk"(option), for RGMII sampleing clock which fixed at 250Mhz.
> > +    The clock is required if SOC RGMII enable clock delay.
> > +- fsl,rgmii_txc_dly: add RGMII TXC delayed clock from MAC.
> > +- fsl,rgmii_rxc_dly: add RGMII RXC delayed clock from MAC.
> 
> Don't we have standard properties for this?

Yes, rx-internal-delay-ps and tx-internal-delay-ps defined in
ethernet-controller.yaml

     Andrew

[PATCH V1 net-next 3/5] net: fec: add imx8mq and imx8qm new versions support

[Joakim Zhang]

From: Fugang Duan <fugang.duan@nxp.com>

The ENET of imx8mq and imx8qm are basically the same as imx6sx,
but they have new features support based on imx6sx, like:
- imx8mq: supports IEEE 802.3az EEE standard.
- imx8qm: supports RGMII mode delayed clock.

Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
---
 drivers/net/ethernet/freescale/fec.h      | 13 ++++++++++
 drivers/net/ethernet/freescale/fec_main.c | 30 +++++++++++++++++++++++
 2 files changed, 43 insertions(+)

diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
index 2e002e4b4b4a..c1f93aa79d63 100644
--- a/drivers/net/ethernet/freescale/fec.h
+++ b/drivers/net/ethernet/freescale/fec.h
@@ -472,6 +472,19 @@ struct bufdesc_ex {
  */
 #define FEC_QUIRK_HAS_MULTI_QUEUES	(1 << 19)
 
+/* i.MX8MQ ENET IP version add new feature to support IEEE 802.3az EEE
+ * standard. For the transmission, MAC supply two user registers to set
+ * Sleep (TS) and Wake (TW) time.
+ */
+#define FEC_QUIRK_HAS_EEE		(1 << 20)
+
+/* i.MX8QM ENET IP version add new feture to generate delayed TXC/RXC
+ * as an alternative option to make sure it works well with various PHYs.
+ * For the implementation of delayed clock, ENET takes synchronized 250MHz
+ * clocks to generate 2ns delay.
+ */
+#define FEC_QUIRK_DELAYED_CLKS_SUPPORT	(1 << 21)
+
 struct bufdesc_prop {
 	int qid;
 	/* Address of Rx and Tx buffers */
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 8aea707a65a7..dd0b8715e84e 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -135,6 +135,26 @@ static const struct fec_devinfo fec_imx6ul_info = {
 		  FEC_QUIRK_HAS_COALESCE | FEC_QUIRK_CLEAR_SETUP_MII,
 };
 
+static const struct fec_devinfo fec_imx8mq_info = {
+	.quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
+		  FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
+		  FEC_QUIRK_HAS_VLAN | FEC_QUIRK_HAS_AVB |
+		  FEC_QUIRK_ERR007885 | FEC_QUIRK_BUG_CAPTURE |
+		  FEC_QUIRK_HAS_RACC | FEC_QUIRK_HAS_COALESCE |
+		  FEC_QUIRK_CLEAR_SETUP_MII | FEC_QUIRK_HAS_MULTI_QUEUES |
+		  FEC_QUIRK_HAS_EEE,
+};
+
+static const struct fec_devinfo fec_imx8qm_info = {
+	.quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
+		  FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
+		  FEC_QUIRK_HAS_VLAN | FEC_QUIRK_HAS_AVB |
+		  FEC_QUIRK_ERR007885 | FEC_QUIRK_BUG_CAPTURE |
+		  FEC_QUIRK_HAS_RACC | FEC_QUIRK_HAS_COALESCE |
+		  FEC_QUIRK_CLEAR_SETUP_MII | FEC_QUIRK_HAS_MULTI_QUEUES |
+		  FEC_QUIRK_DELAYED_CLKS_SUPPORT,
+};
+
 static struct platform_device_id fec_devtype[] = {
 	{
 		/* keep it for coldfire */
@@ -161,6 +181,12 @@ static struct platform_device_id fec_devtype[] = {
 	}, {
 		.name = "imx6ul-fec",
 		.driver_data = (kernel_ulong_t)&fec_imx6ul_info,
+	}, {
+		.name = "imx8mq-fec",
+		.driver_data = (kernel_ulong_t)&fec_imx8mq_info,
+	}, {
+		.name = "imx8qm-fec",
+		.driver_data = (kernel_ulong_t)&fec_imx8qm_info,
 	}, {
 		/* sentinel */
 	}
@@ -175,6 +201,8 @@ enum imx_fec_type {
 	MVF600_FEC,
 	IMX6SX_FEC,
 	IMX6UL_FEC,
+	IMX8MQ_FEC,
+	IMX8QM_FEC,
 };
 
 static const struct of_device_id fec_dt_ids[] = {
@@ -185,6 +213,8 @@ static const struct of_device_id fec_dt_ids[] = {
 	{ .compatible = "fsl,mvf600-fec", .data = &fec_devtype[MVF600_FEC], },
 	{ .compatible = "fsl,imx6sx-fec", .data = &fec_devtype[IMX6SX_FEC], },
 	{ .compatible = "fsl,imx6ul-fec", .data = &fec_devtype[IMX6UL_FEC], },
+	{ .compatible = "fsl,imx8mq-fec", .data = &fec_devtype[IMX8MQ_FEC], },
+	{ .compatible = "fsl,imx8qm-fec", .data = &fec_devtype[IMX8QM_FEC], },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, fec_dt_ids);
-- 
2.17.1

Re: [PATCH V1 net-next 3/5] net: fec: add imx8mq and imx8qm new versions support

[Rob Herring]

On Fri, Jul 09, 2021 at 04:18:21PM +0800, Joakim Zhang wrote:
> From: Fugang Duan <fugang.duan@nxp.com>
> 
> The ENET of imx8mq and imx8qm are basically the same as imx6sx,
> but they have new features support based on imx6sx, like:
> - imx8mq: supports IEEE 802.3az EEE standard.
> - imx8qm: supports RGMII mode delayed clock.
> 
> Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
> Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
> ---
>  drivers/net/ethernet/freescale/fec.h      | 13 ++++++++++
>  drivers/net/ethernet/freescale/fec_main.c | 30 +++++++++++++++++++++++
>  2 files changed, 43 insertions(+)
> 
> diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
> index 2e002e4b4b4a..c1f93aa79d63 100644
> --- a/drivers/net/ethernet/freescale/fec.h
> +++ b/drivers/net/ethernet/freescale/fec.h
> @@ -472,6 +472,19 @@ struct bufdesc_ex {
>   */
>  #define FEC_QUIRK_HAS_MULTI_QUEUES	(1 << 19)
>  
> +/* i.MX8MQ ENET IP version add new feature to support IEEE 802.3az EEE
> + * standard. For the transmission, MAC supply two user registers to set
> + * Sleep (TS) and Wake (TW) time.
> + */
> +#define FEC_QUIRK_HAS_EEE		(1 << 20)
> +
> +/* i.MX8QM ENET IP version add new feture to generate delayed TXC/RXC
> + * as an alternative option to make sure it works well with various PHYs.
> + * For the implementation of delayed clock, ENET takes synchronized 250MHz
> + * clocks to generate 2ns delay.
> + */
> +#define FEC_QUIRK_DELAYED_CLKS_SUPPORT	(1 << 21)
> +
>  struct bufdesc_prop {
>  	int qid;
>  	/* Address of Rx and Tx buffers */
> diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
> index 8aea707a65a7..dd0b8715e84e 100644
> --- a/drivers/net/ethernet/freescale/fec_main.c
> +++ b/drivers/net/ethernet/freescale/fec_main.c
> @@ -135,6 +135,26 @@ static const struct fec_devinfo fec_imx6ul_info = {
>  		  FEC_QUIRK_HAS_COALESCE | FEC_QUIRK_CLEAR_SETUP_MII,
>  };
>  
> +static const struct fec_devinfo fec_imx8mq_info = {
> +	.quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
> +		  FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
> +		  FEC_QUIRK_HAS_VLAN | FEC_QUIRK_HAS_AVB |
> +		  FEC_QUIRK_ERR007885 | FEC_QUIRK_BUG_CAPTURE |
> +		  FEC_QUIRK_HAS_RACC | FEC_QUIRK_HAS_COALESCE |
> +		  FEC_QUIRK_CLEAR_SETUP_MII | FEC_QUIRK_HAS_MULTI_QUEUES |
> +		  FEC_QUIRK_HAS_EEE,
> +};
> +
> +static const struct fec_devinfo fec_imx8qm_info = {
> +	.quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
> +		  FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
> +		  FEC_QUIRK_HAS_VLAN | FEC_QUIRK_HAS_AVB |
> +		  FEC_QUIRK_ERR007885 | FEC_QUIRK_BUG_CAPTURE |
> +		  FEC_QUIRK_HAS_RACC | FEC_QUIRK_HAS_COALESCE |
> +		  FEC_QUIRK_CLEAR_SETUP_MII | FEC_QUIRK_HAS_MULTI_QUEUES |
> +		  FEC_QUIRK_DELAYED_CLKS_SUPPORT,
> +};
> +
>  static struct platform_device_id fec_devtype[] = {
>  	{
>  		/* keep it for coldfire */
> @@ -161,6 +181,12 @@ static struct platform_device_id fec_devtype[] = {
>  	}, {
>  		.name = "imx6ul-fec",
>  		.driver_data = (kernel_ulong_t)&fec_imx6ul_info,
> +	}, {
> +		.name = "imx8mq-fec",
> +		.driver_data = (kernel_ulong_t)&fec_imx8mq_info,
> +	}, {
> +		.name = "imx8qm-fec",
> +		.driver_data = (kernel_ulong_t)&fec_imx8qm_info,
>  	}, {
>  		/* sentinel */
>  	}
> @@ -175,6 +201,8 @@ enum imx_fec_type {
>  	MVF600_FEC,
>  	IMX6SX_FEC,
>  	IMX6UL_FEC,
> +	IMX8MQ_FEC,
> +	IMX8QM_FEC,
>  };
>  
>  static const struct of_device_id fec_dt_ids[] = {
> @@ -185,6 +213,8 @@ static const struct of_device_id fec_dt_ids[] = {
>  	{ .compatible = "fsl,mvf600-fec", .data = &fec_devtype[MVF600_FEC], },
>  	{ .compatible = "fsl,imx6sx-fec", .data = &fec_devtype[IMX6SX_FEC], },
>  	{ .compatible = "fsl,imx6ul-fec", .data = &fec_devtype[IMX6UL_FEC], },
> +	{ .compatible = "fsl,imx8mq-fec", .data = &fec_devtype[IMX8MQ_FEC], },
> +	{ .compatible = "fsl,imx8qm-fec", .data = &fec_devtype[IMX8QM_FEC], },

I don't think these are documented.

Rob

[PATCH V1 net-next 4/5] net: fec: add eee mode tx lpi support

[Joakim Zhang]

From: Fugang Duan <fugang.duan@nxp.com>

The i.MX8MQ ENET version support IEEE802.3az eee mode, add
eee mode tx lpi enable to support ethtool interface.

usage:
1. set sleep and wake timer to 5ms:
ethtool --set-eee eth0 eee on tx-lpi on tx-timer 5000
2. check the eee mode:
~# ethtool --show-eee eth0
EEE Settings for eth0:
        EEE status: enabled - active
        Tx LPI: 5000 (us)
        Supported EEE link modes:  100baseT/Full
                                   1000baseT/Full
        Advertised EEE link modes:  100baseT/Full
                                    1000baseT/Full
        Link partner advertised EEE link modes:  100baseT/Full

Note: For realtime case and IEEE1588 ptp case, it should disable
EEE mode.

Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
---
 drivers/net/ethernet/freescale/fec.h      |  6 ++
 drivers/net/ethernet/freescale/fec_main.c | 89 +++++++++++++++++++++++
 2 files changed, 95 insertions(+)

diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
index c1f93aa79d63..0a741bc440e4 100644
--- a/drivers/net/ethernet/freescale/fec.h
+++ b/drivers/net/ethernet/freescale/fec.h
@@ -77,6 +77,8 @@
 #define FEC_R_DES_ACTIVE_2	0x1e8 /* Rx descriptor active for ring 2 */
 #define FEC_X_DES_ACTIVE_2	0x1ec /* Tx descriptor active for ring 2 */
 #define FEC_QOS_SCHEME		0x1f0 /* Set multi queues Qos scheme */
+#define FEC_LPI_SLEEP		0x1f4 /* Set IEEE802.3az LPI Sleep Ts time */
+#define FEC_LPI_WAKE		0x1f8 /* Set IEEE802.3az LPI Wake Tw time */
 #define FEC_MIIGSK_CFGR		0x300 /* MIIGSK Configuration reg */
 #define FEC_MIIGSK_ENR		0x308 /* MIIGSK Enable reg */
 
@@ -602,6 +604,10 @@ struct fec_enet_private {
 	unsigned int tx_time_itr;
 	unsigned int itr_clk_rate;
 
+	/* tx lpi eee mode */
+	struct ethtool_eee eee;
+	unsigned int clk_ref_rate;
+
 	u32 rx_copybreak;
 
 	/* ptp clock period in ns*/
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index dd0b8715e84e..24082b3f2118 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -2722,6 +2722,92 @@ static int fec_enet_set_tunable(struct net_device *netdev,
 	return ret;
 }
 
+/* LPI Sleep Ts count base on tx clk (clk_ref).
+ * The lpi sleep cnt value = X us / (cycle_ns).
+ */
+static int fec_enet_us_to_tx_cycle(struct net_device *ndev, int us)
+{
+	struct fec_enet_private *fep = netdev_priv(ndev);
+
+	return us * (fep->clk_ref_rate / 1000) / 1000;
+}
+
+static int fec_enet_eee_mode_set(struct net_device *ndev, bool enable)
+{
+	struct fec_enet_private *fep = netdev_priv(ndev);
+	struct ethtool_eee *p = &fep->eee;
+	unsigned int sleep_cycle, wake_cycle;
+	int ret = 0;
+
+	if (enable) {
+		ret = phy_init_eee(ndev->phydev, 0);
+		if (ret)
+			return ret;
+
+		sleep_cycle = fec_enet_us_to_tx_cycle(ndev, p->tx_lpi_timer);
+		wake_cycle = sleep_cycle;
+	} else {
+		sleep_cycle = 0;
+		wake_cycle = 0;
+	}
+
+	p->tx_lpi_enabled = enable;
+	p->eee_enabled = enable;
+	p->eee_active = enable;
+
+	writel(sleep_cycle, fep->hwp + FEC_LPI_SLEEP);
+	writel(wake_cycle, fep->hwp + FEC_LPI_WAKE);
+
+	return 0;
+}
+
+static int
+fec_enet_get_eee(struct net_device *ndev, struct ethtool_eee *edata)
+{
+	struct fec_enet_private *fep = netdev_priv(ndev);
+	struct ethtool_eee *p = &fep->eee;
+
+	if (!(fep->quirks & FEC_QUIRK_HAS_EEE))
+		return -EOPNOTSUPP;
+
+	if (!netif_running(ndev))
+		return -ENETDOWN;
+
+	edata->eee_enabled = p->eee_enabled;
+	edata->eee_active = p->eee_active;
+	edata->tx_lpi_timer = p->tx_lpi_timer;
+	edata->tx_lpi_enabled = p->tx_lpi_enabled;
+
+	return phy_ethtool_get_eee(ndev->phydev, edata);
+}
+
+static int
+fec_enet_set_eee(struct net_device *ndev, struct ethtool_eee *edata)
+{
+	struct fec_enet_private *fep = netdev_priv(ndev);
+	struct ethtool_eee *p = &fep->eee;
+	int ret = 0;
+
+	if (!(fep->quirks & FEC_QUIRK_HAS_EEE))
+		return -EOPNOTSUPP;
+
+	if (!netif_running(ndev))
+		return -ENETDOWN;
+
+	p->tx_lpi_timer = edata->tx_lpi_timer;
+
+	if (!edata->eee_enabled || !edata->tx_lpi_enabled ||
+	    !edata->tx_lpi_timer)
+		ret = fec_enet_eee_mode_set(ndev, false);
+	else
+		ret = fec_enet_eee_mode_set(ndev, true);
+
+	if (ret)
+		return ret;
+
+	return phy_ethtool_set_eee(ndev->phydev, edata);
+}
+
 static void
 fec_enet_get_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
 {
@@ -2782,6 +2868,8 @@ static const struct ethtool_ops fec_enet_ethtool_ops = {
 	.set_tunable		= fec_enet_set_tunable,
 	.get_wol		= fec_enet_get_wol,
 	.set_wol		= fec_enet_set_wol,
+	.get_eee		= fec_enet_get_eee,
+	.set_eee		= fec_enet_set_eee,
 	.get_link_ksettings	= phy_ethtool_get_link_ksettings,
 	.set_link_ksettings	= phy_ethtool_set_link_ksettings,
 	.self_test		= net_selftest,
@@ -3722,6 +3810,7 @@ fec_probe(struct platform_device *pdev)
 	fep->clk_ref = devm_clk_get(&pdev->dev, "enet_clk_ref");
 	if (IS_ERR(fep->clk_ref))
 		fep->clk_ref = NULL;
+	fep->clk_ref_rate = clk_get_rate(fep->clk_ref);
 
 	fep->bufdesc_ex = fep->quirks & FEC_QUIRK_HAS_BUFDESC_EX;
 	fep->clk_ptp = devm_clk_get(&pdev->dev, "ptp");
-- 
2.17.1

[PATCH V1 net-next 5/5] net: fec: add MAC internal delayed clock feature support

[Joakim Zhang]

From: Fugang Duan <fugang.duan@nxp.com>

i.MX8QM ENET IP version support timing specification that MAC
integrate clock delay in RGMII mode, the delayed TXC/RXC as an
alternative option to work well with various PHYs.

Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
---
 drivers/net/ethernet/freescale/fec.h      |  6 ++++++
 drivers/net/ethernet/freescale/fec_main.c | 26 +++++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
index 0a741bc440e4..ae3259164395 100644
--- a/drivers/net/ethernet/freescale/fec.h
+++ b/drivers/net/ethernet/freescale/fec.h
@@ -381,6 +381,9 @@ struct bufdesc_ex {
 #define FEC_DEFAULT_IMASK (FEC_ENET_TXF | FEC_ENET_RXF)
 #define FEC_RX_DISABLED_IMASK (FEC_DEFAULT_IMASK & (~FEC_ENET_RXF))
 
+#define FEC_ENET_TXC_DLY	((uint)0x00010000)
+#define FEC_ENET_RXC_DLY	((uint)0x00020000)
+
 /* ENET interrupt coalescing macro define */
 #define FEC_ITR_CLK_SEL		(0x1 << 30)
 #define FEC_ITR_EN		(0x1 << 31)
@@ -543,6 +546,7 @@ struct fec_enet_private {
 	struct clk *clk_ref;
 	struct clk *clk_enet_out;
 	struct clk *clk_ptp;
+	struct clk *clk_2x_txclk;
 
 	bool ptp_clk_on;
 	struct mutex ptp_clk_mutex;
@@ -565,6 +569,8 @@ struct fec_enet_private {
 	uint	phy_speed;
 	phy_interface_t	phy_interface;
 	struct device_node *phy_node;
+	bool	rgmii_txc_dly;
+	bool	rgmii_rxc_dly;
 	int	link;
 	int	full_duplex;
 	int	speed;
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 24082b3f2118..18ab60322688 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -1137,6 +1137,13 @@ fec_restart(struct net_device *ndev)
 	if (fep->bufdesc_ex)
 		ecntl |= (1 << 4);
 
+	if (fep->quirks & FEC_QUIRK_DELAYED_CLKS_SUPPORT &&
+	    fep->rgmii_txc_dly)
+		ecntl |= FEC_ENET_TXC_DLY;
+	if (fep->quirks & FEC_QUIRK_DELAYED_CLKS_SUPPORT &&
+	    fep->rgmii_rxc_dly)
+		ecntl |= FEC_ENET_RXC_DLY;
+
 #ifndef CONFIG_M5272
 	/* Enable the MIB statistic event counters */
 	writel(0 << 31, fep->hwp + FEC_MIB_CTRLSTAT);
@@ -2000,6 +2007,10 @@ static int fec_enet_clk_enable(struct net_device *ndev, bool enable)
 		if (ret)
 			goto failed_clk_ref;
 
+		ret = clk_prepare_enable(fep->clk_2x_txclk);
+		if (ret)
+			goto failed_clk_2x_txclk;
+
 		fec_enet_phy_reset_after_clk_enable(ndev);
 	} else {
 		clk_disable_unprepare(fep->clk_enet_out);
@@ -2010,10 +2021,14 @@ static int fec_enet_clk_enable(struct net_device *ndev, bool enable)
 			mutex_unlock(&fep->ptp_clk_mutex);
 		}
 		clk_disable_unprepare(fep->clk_ref);
+		clk_disable_unprepare(fep->clk_2x_txclk);
 	}
 
 	return 0;
 
+failed_clk_2x_txclk:
+	if (fep->clk_ref)
+		clk_disable_unprepare(fep->clk_ref);
 failed_clk_ref:
 	if (fep->clk_ptp) {
 		mutex_lock(&fep->ptp_clk_mutex);
@@ -3761,6 +3776,12 @@ fec_probe(struct platform_device *pdev)
 	if (ret)
 		goto failed_stop_mode;
 
+	if (of_get_property(np, "fsl,rgmii_txc_dly", NULL))
+		fep->rgmii_txc_dly = true;
+
+	if (of_get_property(np, "fsl,rgmii_rxc_dly", NULL))
+		fep->rgmii_rxc_dly = true;
+
 	phy_node = of_parse_phandle(np, "phy-handle", 0);
 	if (!phy_node && of_phy_is_fixed_link(np)) {
 		ret = of_phy_register_fixed_link(np);
@@ -3812,6 +3833,11 @@ fec_probe(struct platform_device *pdev)
 		fep->clk_ref = NULL;
 	fep->clk_ref_rate = clk_get_rate(fep->clk_ref);
 
+	/* clk_2x_txclk is optional, depends on board */
+	fep->clk_2x_txclk = devm_clk_get(&pdev->dev, "enet_2x_txclk");
+	if (IS_ERR(fep->clk_2x_txclk))
+		fep->clk_2x_txclk = NULL;
+
 	fep->bufdesc_ex = fep->quirks & FEC_QUIRK_HAS_BUFDESC_EX;
 	fep->clk_ptp = devm_clk_get(&pdev->dev, "ptp");
 	if (IS_ERR(fep->clk_ptp)) {
-- 
2.17.1