[PATCH v3 0/9] arc_emac: fixes the emac issues and cleanup emac drivers

[PATCH v3 0/9] arc_emac: fixes the emac issues and cleanup emac drivers

[Caesar Wang]

Hi all,
This series patches are based on kernel 4.5-rc7+ version.
Linux version 4.5.0-rc7-next-20160311+ (wxt@nb) (...) #45 SMP Sun Mar 13 16:17:56

The history patch in here:
Patch-v1: https://lkml.org/lkml/2016/3/11/209
Patch-v2: https://lkml.org/lkml/2016/3/13/39

Verified on kylin board with my github.
https://github.com/Caesar-github/rockchip/tree/kylin/next

That's verified on kylin board with ubuntu os.

This series patches are built all pass with Mr.robot on
https://github.com/Caesar-github/linux/tree/build-emac-v3

How to test and verify?

You can refer to the following wiki document.
http://rockchip.wikidot.com/linux-develop-guide

bootup log:
[    1.264740] rockchip_emac 10200000.ethernet: no regulator found
[    1.270908] rockchip_emac 10200000.ethernet: ARC EMAC detected with id: 0x7fd02
[    1.278362] rockchip_emac 10200000.ethernet: IRQ is 29
[    1.283747] rockchip_emac 10200000.ethernet: MAC address is now 06:5d:61:c7:39:41
[    1.291314] rockchip_emac 10200000.ethernet: GPIO lookup for consumer phy-reset
[    1.291333] rockchip_emac 10200000.ethernet: using device tree for GPIO lookup
[    1.663155] rockchip_emac 10200000.ethernet: connected to Generic PHY phy with id 0xffffc816
[    8.863448] rockchip_emac 10200000.ethernet eth0: Link is Up - 100Mbps/Full - flow control off

root@localhost:/# busybox ping www.baidu.com
PING www.baidu.com (14.215.177.38): 56 data bytes
64 bytes from 14.215.177.38: seq=0 ttl=48 time=35.046 ms
64 bytes from 14.215.177.38: seq=1 ttl=48 time=35.095 ms
64 bytes from 14.215.177.38: seq=2 ttl=48 time=34.203 ms
64 bytes from 14.215.177.38: seq=3 ttl=48 time=38.516 ms
...
---

1) This series has 6 patches: (1--->9)
net: arc_emac: make the rockchip emac document more compatible
net: arc_emac: add phy reset is optional for device tree
net: arc_emac: support the phy reset for emac driver
net: arc: trivial: cleanup the emac driver
clk: rockchip: add node-id for rk3036 emac hclk
clk: rockchip: associate the rk3036 HCLK_EMAC clock-id
clk: rockchip: add clock-id for rk3036 emac pll source clock
clk: rockchip: associate SCLK_MAC_PLL and disable reparenting on rk3036
ARM: dts: rockchip: add support emac for RK3036

2) This series patches have the following descriptions:

Hi Rob, David:
PATCH[1/9-2/9]: ====>
net: arc_emac: make the rockchip emac document more compatible
net: arc_emac: add phy reset is optional for device tree

The patches change the rockchip emac document for more compatible and
Add the phy reset property for document.
---

Hi David
PATCH[3/9]: ====>
net: arc_emac: support the phy reset for emac driver

The emac didn't work on kylin board since in some case the clocks parent changed.
The kylin hardware connects the phy reset pin, we should use it with real world.
As the previous patch discuss on https://patchwork.kernel.org/patch/8186801/

And as sergei/Heiko suggestions on
https://patchwork.kernel.org/patch/8564571/
---

Hi David
PATCH[4/9]: ====>
net: arc: trivial: cleanup the emac driver

The first time to look the emac drivers, I think that have to cleanup the drivers with scripts.
Although it's the trivial things, in order to be more read.
---

Hi Heiko,Michael,Stephen:
PATCH[5/9-8/9]: ====> clk: rockchip: rk3036: fix and add node id for emac clock

Four-part from https://patchwork.kernel.org/patch/8564581/
clk: rockchip: add node-id for rk3036 emac hclk
clk: rockchip: associate the rk3036 HCLK_EMAC clock-id
clk: rockchip: add clock-id for rk3036 emac pll source clock
clk: rockchip: associate SCLK_MAC_PLL and disable reparenting on rk3036

Add the emac needed clocks for rk3036 SoCs
---

Hi Heiko:
PATCH[9/9]: ====>
ARM: dts: rockchip: add support emac for RK3036

Add the emac needed main info for rk3036 dts.
---

Thanks your reviewing! :)


Changes in v3:
- %s/he/the
- Add the Cc people
- As Sergei comments, the original name is better, so
  %s/reset-gpios/phy-reset-gpios
- Add the Cc people.
- Caused the build error since the missing include head file.
- %s/reset/phy-reset to match the device tree.
- Add the Cc people
- Add the Cc people.
- Add the Cc people.
- Add the Cc people.
- Add the Cc people.
- Add the Cc people.
- rename reset-gpio to phy-reset-gpios.
- change the commit.
- remove the pcfg_output_high, that's really not needed for emac.
- Add the Cc people.
- Fixes the 'zhengxing' to 'Xing Zheng'.

Changes in v2:
- change the commit and remove the repeat the name 'rockchip'.
- %s/phy-reset-gpios/reset-gpios
- As the pervious version, Sergei and Heiko comments on
  https://patchwork.kernel.org/patch/8564571/.
- Nevermind, add signed-off since Heiko the original patch,
  refer the Heiko's test patch on
  https://github.com/mmind/linux-rockchip/commit/a943c588783438ff1c508dfa8c79f1709aa5775e
  :)
- As the robot notice the build error since overflow in implicit
  constant conversion.
- rename phy-reset-gpio to reset-gpios.

Caesar Wang (4):
  net: arc_emac: make the rockchip emac document more compatible
  net: arc_emac: add phy reset is optional for device tree
  net: arc_emac: support the phy reset for emac driver
  net: arc: trivial: cleanup the emac driver

Heiko Stuebner (1):
  clk: rockchip: associate SCLK_MAC_PLL and disable reparenting on
    rk3036

Xing Zheng (4):
  clk: rockchip: add node-id for rk3036 emac hclk
  clk: rockchip: associate the rk3036 HCLK_EMAC clock-id
  clk: rockchip: add clock-id for rk3036 emac pll source clock
  ARM: dts: rockchip: add to support emac for rk3036 SoCs

 Documentation/devicetree/bindings/net/arc_emac.txt |  7 +++
 .../devicetree/bindings/net/emac_rockchip.txt      |  8 +--
 arch/arm/boot/dts/rk3036-evb.dts                   | 14 +++++
 arch/arm/boot/dts/rk3036-kylin.dts                 | 14 +++++
 arch/arm/boot/dts/rk3036.dtsi                      | 39 ++++++++++++++
 drivers/clk/rockchip/clk-rk3036.c                  |  4 +-
 drivers/net/ethernet/arc/emac.h                    | 60 ++++++++++++----------
 drivers/net/ethernet/arc/emac_main.c               | 35 ++++++-------
 drivers/net/ethernet/arc/emac_mdio.c               | 39 +++++++++++++-
 drivers/net/ethernet/arc/emac_rockchip.c           | 41 ++++++++++-----
 include/dt-bindings/clock/rk3036-cru.h             |  2 +
 11 files changed, 201 insertions(+), 62 deletions(-)

-- 
1.9.1

[PATCH v3 1/9] net: arc_emac: make the rockchip emac document more compatible

[Caesar Wang]

Add the rk3036 SoCs to match driver for document since the emac driver
has supported the rk3036 SoCs.

This patch adds the rk3036/rk3066/rk3188 SoCS to compatible for rockchip
emac ducument. Also, that will suit for other SoCs in the future.

Signed-off-by: Caesar Wang <wxt-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Cc: Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: "David S. Miller" <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
Cc: Alexander Kochetkov <al.kochet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

---

Changes in v3:
- %s/he/the
- Add the Cc people

Changes in v2:
- change the commit and remove the repeat the name 'rockchip'.

 Documentation/devicetree/bindings/net/emac_rockchip.txt | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/emac_rockchip.txt b/Documentation/devicetree/bindings/net/emac_rockchip.txt
index 8dc1c79..05bd7da 100644
--- a/Documentation/devicetree/bindings/net/emac_rockchip.txt
+++ b/Documentation/devicetree/bindings/net/emac_rockchip.txt
@@ -1,8 +1,10 @@
-* ARC EMAC 10/100 Ethernet platform driver for Rockchip Rk3066/RK3188 SoCs
+* ARC EMAC 10/100 Ethernet platform driver for Rockchip RK3036/RK3066/RK3188 SoCs
 
 Required properties:
-- compatible: Should be "rockchip,rk3066-emac" or "rockchip,rk3188-emac"
-  according to the target SoC.
+- compatible: should be "rockchip,<name>-emac"
+   "rockchip,rk3036-emac": found on RK3036 SoCs
+   "rockchip,rk3066-emac": found on RK3066 SoCs
+   "rockchip,rk3188-emac": found on RK3188 SoCs
 - reg: Address and length of the register set for the device
 - interrupts: Should contain the EMAC interrupts
 - rockchip,grf: phandle to the syscon grf used to control speed and mode
-- 
1.9.1

[PATCH v3 2/9] net: arc_emac: add phy reset is optional for device tree

[Caesar Wang]

This patch adds the following property for arc_emac.

1) phy-reset-gpios:
The phy-reset-gpio is an optional property for arc emac device tree boot.
Change the binding document to match the driver code.

2) phy-reset-duration:
Different boards may require different phy reset duration. Add property
phy-reset-duration for device tree probe, so that the boards that need
a longer reset duration can specify it in their device tree.

Anyway, we can add the above property for arc emac.

Signed-off-by: Caesar Wang <wxt-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Cc: Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: "David S. Miller" <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
Cc: Sergei Shtylyov <sergei.shtylyov-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org>
Cc; Alexander Kochetkov <al.kochet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

---

Changes in v3:
- As Sergei comments, the original name is better, so
  %s/reset-gpios/phy-reset-gpios
- Add the Cc people.

Changes in v2:
- %s/phy-reset-gpios/reset-gpios

 Documentation/devicetree/bindings/net/arc_emac.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/arc_emac.txt b/Documentation/devicetree/bindings/net/arc_emac.txt
index a1d71eb..c73a0e9 100644
--- a/Documentation/devicetree/bindings/net/arc_emac.txt
+++ b/Documentation/devicetree/bindings/net/arc_emac.txt
@@ -7,6 +7,13 @@ Required properties:
 - max-speed: see ethernet.txt file in the same directory.
 - phy: see ethernet.txt file in the same directory.
 
+Optional properties:
+- phy-reset-gpios : Should specify the gpio for phy reset
+- phy-reset-duration : Reset duration in milliseconds.  Should present
+  only if property "phy-reset-gpios" is available.  Missing the property
+  will have the duration be 1 millisecond.  Numbers greater than 1000 are
+  invalid and 1 millisecond will be used instead.
+
 Clock handling:
 The clock frequency is needed to calculate and set polling period of EMAC.
 It must be provided by one of:
-- 
1.9.1

[PATCH v3 5/9] clk: rockchip: add node-id for rk3036 emac hclk

[Caesar Wang]

From: Xing Zheng <zhengxing-TNX95d0MmH7DzftRWevZcw@public.gmane.org>

Add the node-id for the emac hclk to the binding header.

Signed-off-by: Xing Zheng <zhengxing-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Signed-off-by: Caesar Wang <wxt-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Cc: Xing Zheng <zhengxing-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Cc: Michael Turquette <mturquette-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
Cc: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>
Cc: Stephen Boyd <sboyd-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Cc: linux-clk-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org

---

Changes in v3:
- Add the Cc people.

Changes in v2: None

 include/dt-bindings/clock/rk3036-cru.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/dt-bindings/clock/rk3036-cru.h b/include/dt-bindings/clock/rk3036-cru.h
index ebc7a7b..3396591 100644
--- a/include/dt-bindings/clock/rk3036-cru.h
+++ b/include/dt-bindings/clock/rk3036-cru.h
@@ -92,6 +92,7 @@
 #define HCLK_SDMMC		456
 #define HCLK_SDIO		457
 #define HCLK_EMMC		459
+#define HCLK_MAC		460
 #define HCLK_I2S		462
 #define HCLK_LCDC		465
 #define HCLK_ROM		467
-- 
1.9.1

[PATCH v3 7/9] clk: rockchip: add clock-id for rk3036 emac pll source clock

[Caesar Wang]

From: Xing Zheng <zhengxing-TNX95d0MmH7DzftRWevZcw@public.gmane.org>

Suitable PLLs for the emac on the rk3036 are difficult to find
and one of them is the (continuously changing) APLL. So in most
cases it will be necessary to select a PLL manually.
So add a clock-id for it.

Signed-off-by: Xing Zheng <zhengxing-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Signed-off-by: Caesar Wang <wxt-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Cc: Xing Zheng <zhengxing-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Cc: Michael Turquette <mturquette-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
Cc: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>
Cc: Stephen Boyd <sboyd-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Cc: linux-clk-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org

---

Changes in v3:
- Add the Cc people.

Changes in v2: None

 include/dt-bindings/clock/rk3036-cru.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/dt-bindings/clock/rk3036-cru.h b/include/dt-bindings/clock/rk3036-cru.h
index 3396591..de44109 100644
--- a/include/dt-bindings/clock/rk3036-cru.h
+++ b/include/dt-bindings/clock/rk3036-cru.h
@@ -54,6 +54,7 @@
 #define SCLK_PVTM_VIDEO		125
 #define SCLK_MAC		151
 #define SCLK_MACREF		152
+#define SCLK_MACPLL		153
 #define SCLK_SFC		160
 
 /* aclk gates */
-- 
1.9.1

[PATCH v3 9/9] ARM: dts: rockchip: add to support emac for rk3036 SoCs

[Caesar Wang]

From: Xing Zheng <zhengxing-TNX95d0MmH7DzftRWevZcw@public.gmane.org>

This patch adds the emac device node for rk3036 SoCs.
We need to let mac clock under the DPLL which is able to provide
the accurate 50MHz what mac_ref need, since that will cause some
unstable things if the cpufreq is working.

Signed-off-by: Xing Zheng <zhengxing-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Signed-off-by: Caesar Wang <wxt-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Cc: linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Cc: Xing Zheng <zhengxing-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Cc: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>
Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org

---

Changes in v3:
- rename reset-gpio to phy-reset-gpios.
- change the commit.
- remove the pcfg_output_high, that's really not needed for emac.
- Add the Cc people.
- Fixes the 'zhengxing' to 'Xing Zheng'.

Changes in v2:
- rename phy-reset-gpio to reset-gpios.

 arch/arm/boot/dts/rk3036-evb.dts   | 14 ++++++++++++++
 arch/arm/boot/dts/rk3036-kylin.dts | 14 ++++++++++++++
 arch/arm/boot/dts/rk3036.dtsi      | 39 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 67 insertions(+)

diff --git a/arch/arm/boot/dts/rk3036-evb.dts b/arch/arm/boot/dts/rk3036-evb.dts
index 28a0336..b3d6ec8 100644
--- a/arch/arm/boot/dts/rk3036-evb.dts
+++ b/arch/arm/boot/dts/rk3036-evb.dts
@@ -47,6 +47,20 @@
 	compatible = "rockchip,rk3036-evb", "rockchip,rk3036";
 };
 
+&emac {
+	pinctrl-names = "default";
+	pinctrl-0 = <&emac_xfer>, <&emac_mdio>;
+	phy = <&phy0>;
+	phy-reset-gpios = <&gpio2 22 GPIO_ACTIVE_LOW>; /* PHY_RST */
+	phy-reset-duration = <10>; /* millisecond */
+
+	status = "okay";
+
+	phy0: ethernet-phy@0 {
+		reg = <0>;
+	};
+};
+
 &i2c1 {
 	status = "okay";
 
diff --git a/arch/arm/boot/dts/rk3036-kylin.dts b/arch/arm/boot/dts/rk3036-kylin.dts
index eb9c979..951f15d 100644
--- a/arch/arm/boot/dts/rk3036-kylin.dts
+++ b/arch/arm/boot/dts/rk3036-kylin.dts
@@ -112,6 +112,20 @@
 	status = "okay";
 };
 
+&emac {
+	pinctrl-names = "default";
+	pinctrl-0 = <&emac_xfer>, <&emac_mdio>;
+	phy = <&phy0>;
+	phy-reset-gpios = <&gpio2 22 GPIO_ACTIVE_LOW>; /* PHY_RST */
+	phy-reset-duration = <10>; /* millisecond */
+
+	status = "okay";
+
+	phy0: ethernet-phy@0 {
+		reg = <0>;
+	};
+};
+
 &emmc {
 	status = "okay";
 };
diff --git a/arch/arm/boot/dts/rk3036.dtsi b/arch/arm/boot/dts/rk3036.dtsi
index 90faa86..5175a2a 100644
--- a/arch/arm/boot/dts/rk3036.dtsi
+++ b/arch/arm/boot/dts/rk3036.dtsi
@@ -223,6 +223,27 @@
 		status = "disabled";
 	};
 
+	emac: ethernet@10200000 {
+		compatible = "rockchip,rk3036-emac", "snps,arc-emac";
+		reg = <0x10200000 0x4000>;
+		interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		rockchip,grf = <&grf>;
+		clocks = <&cru HCLK_MAC>, <&cru SCLK_MACREF>, <&cru SCLK_MAC>;
+		clock-names = "hclk", "macref", "macclk";
+		/*
+		 * Fix the emac parent clock is DPLL instead of APLL.
+		 * since that will cause some unstable things if the cpufreq
+		 * is working. (e.g: the accurate 50MHz what mac_ref need)
+		 */
+		assigned-clocks = <&cru SCLK_MACPLL>;
+		assigned-clock-parents = <&cru PLL_DPLL>;
+		max-speed = <100>;
+		phy-mode = "rmii";
+		status = "disabled";
+	};
+
 	sdmmc: dwmmc@10214000 {
 		compatible = "rockchip,rk3036-dw-mshc", "rockchip,rk3288-dw-mshc";
 		reg = <0x10214000 0x4000>;
@@ -628,6 +649,24 @@
 			};
 		};
 
+		emac {
+			emac_xfer: emac-xfer {
+				rockchip,pins = <2 10 RK_FUNC_1 &pcfg_pull_default>, /* crs_dvalid */
+						<2 13 RK_FUNC_1 &pcfg_pull_default>, /* tx_en */
+						<2 14 RK_FUNC_1 &pcfg_pull_default>, /* mac_clk */
+						<2 15 RK_FUNC_1 &pcfg_pull_default>, /* rx_err */
+						<2 16 RK_FUNC_1 &pcfg_pull_default>, /* rxd1 */
+						<2 17 RK_FUNC_1 &pcfg_pull_default>, /* rxd0 */
+						<2 18 RK_FUNC_1 &pcfg_pull_default>, /* txd1 */
+						<2 19 RK_FUNC_1 &pcfg_pull_default>; /* txd0 */
+			};
+
+			emac_mdio: emac-mdio {
+				rockchip,pins = <2 12 RK_FUNC_1 &pcfg_pull_default>, /* mac_md */
+						<2 25 RK_FUNC_1 &pcfg_pull_default>; /* mac_mdclk */
+			};
+		};
+
 		i2c0 {
 			i2c0_xfer: i2c0-xfer {
 				rockchip,pins = <0 0 RK_FUNC_1 &pcfg_pull_none>,
-- 
1.9.1

Re: [PATCH v3 2/9] net: arc_emac: add phy reset is optional for device tree

[Sergei Shtylyov]

Hello.

On 3/14/2016 11:01 AM, Caesar Wang wrote:

> This patch adds the following property for arc_emac.
>
> 1) phy-reset-gpios:
> The phy-reset-gpio is an optional property for arc emac device tree boot.
> Change the binding document to match the driver code.
>
> 2) phy-reset-duration:
> Different boards may require different phy reset duration. Add property
> phy-reset-duration for device tree probe, so that the boards that need
> a longer reset duration can specify it in their device tree.
>
> Anyway, we can add the above property for arc emac.
>
> Signed-off-by: Caesar Wang <wxt-TNX95d0MmH7DzftRWevZcw@public.gmane.org>

   Could you have a look at drivers/net/ethernet/cadence/macb/? It seems to be 
the only driver which places the PHY's "reset-gpios" prop correctly, into the 
PHY subnode? I'm currently working on adding support of this prop into phylib...

MBR, Sergei

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Re: [PATCH v3 0/9] arc_emac: fixes the emac issues and cleanup emac drivers

[David Miller]

Series applied, thanks.

Re: [PATCH v3 2/9] net: arc_emac: add phy reset is optional for device tree

[Caesar Wang]

Hi Sergei,

在 2016年03月16日 21:57, Sergei Shtylyov 写道:
> Hello.
>
> On 3/14/2016 11:01 AM, Caesar Wang wrote:
>
>> This patch adds the following property for arc_emac.
>>
>> 1) phy-reset-gpios:
>> The phy-reset-gpio is an optional property for arc emac device tree 
>> boot.
>> Change the binding document to match the driver code.
>>
>> 2) phy-reset-duration:
>> Different boards may require different phy reset duration. Add property
>> phy-reset-duration for device tree probe, so that the boards that need
>> a longer reset duration can specify it in their device tree.
>>
>> Anyway, we can add the above property for arc emac.
>>
>> Signed-off-by: Caesar Wang <wxt@rock-chips.com>
>
>   Could you have a look at drivers/net/ethernet/cadence/macb/? It 
> seems to be the only driver which places the PHY's "reset-gpios" prop 
> correctly, into the PHY subnode? I'm currently working on adding 
> support of this prop into phylib...

I see the driver on now.


     /* Power up the PHY if there is a GPIO reset */
     phy_node =  of_get_next_available_child(np, NULL);
     if (phy_node) {
         int gpio = of_get_named_gpio(phy_node, "reset-gpios", 0);
         if (gpio_is_valid(gpio))
             bp->reset_gpio = gpio_to_desc(gpio);
         gpiod_set_value(bp->reset_gpio, GPIOD_OUT_HIGH);
     }
     of_node_put(phy_node);
...

Frankly, I don't like this way in device drivers.
That's seem same with the /drivers/mmc/core/pwrseq_simple.c,  power up 
the device.
Is it not really reset hardware PHY from the gpio reset pin?  Just power up.

Of course, I hope to see and test it if you improve the PHY framework to 
support the phy reset.:-)

---

Anyway,  David had applied this series patches into net branch.

Although the clock and dts patches should be applied into Heiko branch,  
I'm glad to see David's way.

Heiko branch:
https://git.kernel.org/cgit/linux/kernel/git/mmind/linux-rockchip.git/


I wish won't destory Heiko to merge in the future.


-Caesar



>
> MBR, Sergei
>
>
> _______________________________________________
> Linux-rockchip mailing list
> Linux-rockchip@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-rockchip


-- 
Thanks,
Caesar

Re: [PATCH v3 1/9] net: arc_emac: make the rockchip emac document more compatible

[Rob Herring]

On Mon, Mar 14, 2016 at 04:01:52PM +0800, Caesar Wang wrote:
> Add the rk3036 SoCs to match driver for document since the emac driver
> has supported the rk3036 SoCs.
> 
> This patch adds the rk3036/rk3066/rk3188 SoCS to compatible for rockchip
> emac ducument. Also, that will suit for other SoCs in the future.
> 
> Signed-off-by: Caesar Wang <wxt-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
> Cc: Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> Cc: netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> Cc: "David S. Miller" <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
> Cc: Alexander Kochetkov <al.kochet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> 
> ---
> 
> Changes in v3:
> - %s/he/the
> - Add the Cc people
> 
> Changes in v2:
> - change the commit and remove the repeat the name 'rockchip'.
> 
>  Documentation/devicetree/bindings/net/emac_rockchip.txt | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)

Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
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