[RESEND PATCH 0/4] Support the rk3399 gmac pd function

This patch add to handle the gmac pd issue, and support
the rk3399 gmac for devicetree.



Caesar Wang (2):
  arm64: dts: rockchip: support gmac for rk3399
  arm64: dts: rockchip: enable the gmac for rk3399 evb board

David Wu (1):
  net: stmmac: dwmac-rk: add pd_gmac support for rk3399

Roger Chen (1):
  net: stmmac: dwmac-rk: fixes the gmac resume after PD on/off

 arch/arm64/boot/dts/rockchip/rk3399-evb.dts    | 31 +++++++++
 arch/arm64/boot/dts/rockchip/rk3399.dtsi       | 90 ++++++++++++++++++++++++++
 drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 28 +++++---
 3 files changed, 140 insertions(+), 9 deletions(-)

-- 
1.9.1

From: Roger Chen <redacted>

GMAC Power Domain(PD) will be disabled during suspend.
That will causes GRF registers reset.
So corresponding GRF registers for GMAC must be setup again.

Signed-off-by: Roger Chen <redacted>
Signed-off-by: Caesar Wang <redacted>
---

 drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index 9210591..289e7a6 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c

@@ -629,6 +629,16 @@ static struct rk_priv_data *rk_gmac_setup(struct platform_device *pdev,
 							"rockchip,grf");
 	bsp_priv->pdev = pdev;
 
+	gmac_clk_init(bsp_priv);
+
+	return bsp_priv;
+}
+
+static int rk_gmac_powerup(struct rk_priv_data *bsp_priv)
+{
+	int ret;
+	struct device *dev = &bsp_priv->pdev->dev;
+
 	/*rmii or rgmii*/
 	if (bsp_priv->phy_iface == PHY_INTERFACE_MODE_RGMII) {
 		dev_info(dev, "init for RGMII\n");

@@ -641,15 +651,6 @@ static struct rk_priv_data *rk_gmac_setup(struct platform_device *pdev,
 		dev_err(dev, "NO interface defined!\n");
 	}
 
-	gmac_clk_init(bsp_priv);
-
-	return bsp_priv;
-}
-
-static int rk_gmac_powerup(struct rk_priv_data *bsp_priv)
-{
-	int ret;
-
 	ret = phy_power_on(bsp_priv, true);
 	if (ret)
 		return ret;

-- 
1.9.1

From: David Wu <redacted>

Add the gmac power domain support for rk3399, in order to save more
power consumption.

Signed-off-by: David Wu <redacted>
Signed-off-by: Caesar Wang <redacted>
---

 drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index 289e7a6..406573d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c

@@ -30,6 +30,7 @@
 #include <linux/delay.h>
 #include <linux/mfd/syscon.h>
 #include <linux/regmap.h>
+#include <linux/pm_runtime.h>
 
 #include "stmmac_platform.h"
 

@@ -659,11 +660,19 @@ static int rk_gmac_powerup(struct rk_priv_data *bsp_priv)
 	if (ret)
 		return ret;
 
+	pm_runtime_enable(dev);
+	pm_runtime_get_sync(dev);
+
 	return 0;
 }
 
 static void rk_gmac_powerdown(struct rk_priv_data *gmac)
 {
+	struct device *dev = &gmac->pdev->dev;
+
+	pm_runtime_put_sync(dev);
+	pm_runtime_disable(dev);
+
 	phy_power_on(gmac, false);
 	gmac_clk_enable(gmac, false);
 }

-- 
1.9.1

This patch adds needed gamc information for rk3399,
also support the gmac pd.

Signed-off-by: Roger Chen <redacted>
Signed-off-by: Caesar Wang <redacted>
---

 arch/arm64/boot/dts/rockchip/rk3399.dtsi | 90 ++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
index 32aebc8..abf27a4 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi

@@ -200,6 +200,26 @@
 		};
 	};
 
+	gmac: eth@fe300000 {
+		compatible = "rockchip,rk3399-gmac";
+		reg = <0x0 0xfe300000 0x0 0x10000>;
+		interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "macirq";
+		clocks = <&cru SCLK_MAC>, <&cru SCLK_MAC_RX>,
+			 <&cru SCLK_MAC_TX>, <&cru SCLK_MACREF>,
+			 <&cru SCLK_MACREF_OUT>, <&cru ACLK_GMAC>,
+			 <&cru PCLK_GMAC>;
+		clock-names = "stmmaceth", "mac_clk_rx",
+			      "mac_clk_tx", "clk_mac_ref",
+			      "clk_mac_refout", "aclk_mac",
+			      "pclk_mac";
+		power-domains = <&power RK3399_PD_GMAC>;
+		resets = <&cru SRST_A_GMAC>;
+		reset-names = "stmmaceth";
+		rockchip,grf = <&grf>;
+		status = "disabled";
+	};
+
 	sdio0: dwmmc@fe310000 {
 		compatible = "rockchip,rk3399-dw-mshc",
 			     "rockchip,rk3288-dw-mshc";

@@ -611,6 +631,11 @@
 		status = "disabled";
 	};
 
+	qos_gmac: qos@ffa5c000 {
+		compatible = "syscon";
+		reg = <0x0 0xffa5c000 0x0 0x20>;
+	};
+
 	qos_hdcp: qos@ffa90000 {
 		compatible = "syscon";
 		reg = <0x0 0xffa90000 0x0 0x20>;

@@ -704,6 +729,11 @@
 			#size-cells = <0>;
 
 			/* These power domains are grouped by VD_CENTER */
+			pd_gmac@RK3399_PD_GMAC {
+				reg = <RK3399_PD_GMAC>;
+				clocks = <&cru ACLK_GMAC>;
+				pm_qos = <&qos_gmac>;
+			};
 			pd_iep@RK3399_PD_IEP {
 				reg = <RK3399_PD_IEP>;
 				clocks = <&cru ACLK_IEP>,

@@ -1183,6 +1213,66 @@
 			drive-strength = <13>;
 		};
 
+		gmac {
+			rgmii_pins: rgmii-pins {
+				rockchip,pins =
+					/* mac_txclk */
+					<3 17 RK_FUNC_1 &pcfg_pull_none_13ma>,
+					/* mac_rxclk */
+					<3 14 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_mdio */
+					<3 13 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_txen */
+					<3 12 RK_FUNC_1 &pcfg_pull_none_13ma>,
+					/* mac_clk */
+					<3 11 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_rxdv */
+					<3 9 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_mdc */
+					<3 8 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_rxd1 */
+					<3 7 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_rxd0 */
+					<3 6 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_txd1 */
+					<3 5 RK_FUNC_1 &pcfg_pull_none_13ma>,
+					/* mac_txd0 */
+					<3 4 RK_FUNC_1 &pcfg_pull_none_13ma>,
+					/* mac_rxd3 */
+					<3 3 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_rxd2 */
+					<3 2 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_txd3 */
+					<3 1 RK_FUNC_1 &pcfg_pull_none_13ma>,
+					/* mac_txd2 */
+					<3 0 RK_FUNC_1 &pcfg_pull_none_13ma>;
+			};
+
+			rmii_pins: rmii-pins {
+				rockchip,pins =
+					/* mac_mdio */
+					<3 13 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_txen */
+					<3 12 RK_FUNC_1 &pcfg_pull_none_13ma>,
+					/* mac_clk */
+					<3 11 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_rxer */
+					<3 10 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_rxdv */
+					<3 9 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_mdc */
+					<3 8 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_rxd1 */
+					<3 7 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_rxd0 */
+					<3 6 RK_FUNC_1 &pcfg_pull_none>,
+					/* mac_txd1 */
+					<3 5 RK_FUNC_1 &pcfg_pull_none_13ma>,
+					/* mac_txd0 */
+					<3 4 RK_FUNC_1 &pcfg_pull_none_13ma>;
+			};
+		};
+
 		i2c0 {
 			i2c0_xfer: i2c0-xfer {
 				rockchip,pins =

-- 
1.9.1

We add the required and optional properties for evb board.
See the [0] to get the detail information.

[0]:
Documentation/devicetree/bindings/net/rockchip-dwmac.txt

Signed-off-by: Roger Chen <redacted>
Signed-off-by: Caesar Wang <redacted>
---

 arch/arm64/boot/dts/rockchip/rk3399-evb.dts | 31 +++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-evb.dts b/arch/arm64/boot/dts/rockchip/rk3399-evb.dts
index d47b4e9..ed6f2e8 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-evb.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-evb.dts

@@ -94,12 +94,43 @@
 		regulator-always-on;
 		regulator-boot-on;
 	};
+
+	clkin_gmac: external-gmac-clock {
+		compatible = "fixed-clock";
+		clock-frequency = <125000000>;
+		clock-output-names = "clkin_gmac";
+		#clock-cells = <0>;
+	};
+
+	vcc_phy: vcc-phy-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc_phy";
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
 };
 
 &emmc_phy {
 	status = "okay";
 };
 
+&gmac {
+	phy-supply = <&vcc_phy>;
+	phy-mode = "rgmii";
+	clock_in_out = "input";
+	snps,reset-gpio = <&gpio3 15 GPIO_ACTIVE_LOW>;
+	snps,reset-active-low;
+	snps,reset-delays-us = <0 10000 50000>;
+	assigned-clocks = <&cru SCLK_RMII_SRC>;
+	assigned-clock-parents = <&clkin_gmac>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&rgmii_pins>;
+	tx_delay = <0x28>;
+	rx_delay = <0x11>;
+	status = "okay";
+};
+
 &pwm0 {
 	status = "okay";
 };

-- 
1.9.1

Caesar,

On Tue, Aug 30, 2016 at 11:13 PM, Caesar Wang [off-list ref] wrote:

This patch adds needed gamc information for rk3399,
also support the gmac pd.

Signed-off-by: Roger Chen <redacted>
Signed-off-by: Caesar Wang <redacted>
---

 arch/arm64/boot/dts/rockchip/rk3399.dtsi | 90 ++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)

I noticed that your subject for this patch contains "RESEND" and not
"v2" event though there are changes between this version and the last
one.  That's really confusing.  This should have been "v2" and the
next version should be "v3".

nit: on rk3288 the node was "ethernet@" instead of "eth@".  Presumably
"ethernet" is more correct?

RK3399_PD_GMAC is not in VD_CENTER but in VD_LOGIC, right?  ...so this
should move.

+                               reg = <RK3399_PD_GMAC>;
+                               clocks = <&cru ACLK_GMAC>;
+                               pm_qos = <&qos_gmac>;
+                       };

IMHO it would be nice if this were broken into two patches.

1. First patch would be the power domain patch and that could land any
time.  You wouldn't actually be able to use the gmac but at least
you'd be able to turn off its power.  This would be a handy patch to
be able to backport if you happened to not need Ethernet support but
wanted to save power.

2. Second patch would actually add the gmac.
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Am Mittwoch, 31. August 2016, 13:42:17 schrieb Doug Anderson:

Caesar,

On Tue, Aug 30, 2016 at 11:13 PM, Caesar Wang [off-list ref] wrote:

quoted

This patch adds needed gamc information for rk3399,
also support the gmac pd.

Signed-off-by: Roger Chen <redacted>
Signed-off-by: Caesar Wang <redacted>
---

 arch/arm64/boot/dts/rockchip/rk3399.dtsi | 90
 ++++++++++++++++++++++++++++++++ 1 file changed, 90 insertions(+)

I noticed that your subject for this patch contains "RESEND" and not
"v2" event though there are changes between this version and the last
one.  That's really confusing.  This should have been "v2" and the
next version should be "v3".

quoted

diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi

b/arch/arm64/boot/dts/rockchip/rk3399.dtsi index 32aebc8..abf27a4 100644

--- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi

@@ -200,6 +200,26 @@

                };
        
        };

+       gmac: eth@fe300000 {

nit: on rk3288 the node was "ethernet@" instead of "eth@".  Presumably
"ethernet" is more correct?

quoted

+               compatible = "rockchip,rk3399-gmac";
+               reg = <0x0 0xfe300000 0x0 0x10000>;
+               interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
+               interrupt-names = "macirq";
+               clocks = <&cru SCLK_MAC>, <&cru SCLK_MAC_RX>,
+                        <&cru SCLK_MAC_TX>, <&cru SCLK_MACREF>,
+                        <&cru SCLK_MACREF_OUT>, <&cru ACLK_GMAC>,
+                        <&cru PCLK_GMAC>;
+               clock-names = "stmmaceth", "mac_clk_rx",
+                             "mac_clk_tx", "clk_mac_ref",
+                             "clk_mac_refout", "aclk_mac",
+                             "pclk_mac";
+               power-domains = <&power RK3399_PD_GMAC>;
+               resets = <&cru SRST_A_GMAC>;
+               reset-names = "stmmaceth";
+               rockchip,grf = <&grf>;
+               status = "disabled";
+       };
+

        sdio0: dwmmc@fe310000 {
        
                compatible = "rockchip,rk3399-dw-mshc",
                
                             "rockchip,rk3288-dw-mshc";

@@ -611,6 +631,11 @@

                status = "disabled";
        
        };

+       qos_gmac: qos@ffa5c000 {
+               compatible = "syscon";
+               reg = <0x0 0xffa5c000 0x0 0x20>;
+       };
+

        qos_hdcp: qos@ffa90000 {
        
                compatible = "syscon";
                reg = <0x0 0xffa90000 0x0 0x20>;

@@ -704,6 +729,11 @@

                        #size-cells = <0>;
                        
                        /* These power domains are grouped by VD_CENTER */

+                       pd_gmac@RK3399_PD_GMAC {

RK3399_PD_GMAC is not in VD_CENTER but in VD_LOGIC, right?  ...so this
should move.

quoted

+                               reg = <RK3399_PD_GMAC>;
+                               clocks = <&cru ACLK_GMAC>;
+                               pm_qos = <&qos_gmac>;
+                       };

IMHO it would be nice if this were broken into two patches.

1. First patch would be the power domain patch and that could land any
time.  You wouldn't actually be able to use the gmac but at least
you'd be able to turn off its power.  This would be a handy patch to
be able to backport if you happened to not need Ethernet support but
wanted to save power.

2. Second patch would actually add the gmac.

according to my talk with Caesar in the real v1, the gmac even with power-
domains should work just nicely even without the dts patches, as the driver 
core takes care of powering up the pd before probe.

But I may miss some peculiarity of the dwmac?


Heiko
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Hi,

On Wed, Aug 31, 2016 at 2:29 PM, Heiko Stübner [off-list ref] wrote:

quoted

IMHO it would be nice if this were broken into two patches.

1. First patch would be the power domain patch and that could land any
time.  You wouldn't actually be able to use the gmac but at least
you'd be able to turn off its power.  This would be a handy patch to
be able to backport if you happened to not need Ethernet support but
wanted to save power.

2. Second patch would actually add the gmac.

according to my talk with Caesar in the real v1, the gmac even with power-
domains should work just nicely even without the dts patches, as the driver
core takes care of powering up the pd before probe.

But I may miss some peculiarity of the dwmac?

Nothing that I'm terribly aware of.  I was just being selfish because:

1. I'm on a board where I don't need Ethernet.

2. I'm running a semi old kernel (4.4)

3. I don't want to pick back the various fixes that might be needed to
make gmac work on rk3399 to that old kernel.

4. I want it very obvious that gmac isn't really supported on this old
kernel on rk3399 (and having stmmac not in the device tree would make
it very obvious)

5. I do want the power savings of turning the power domains off for the gmac.


If this patch is broken in two then I can pick back just the power
domain patch.  :-P



-Doug