[RFT 0/3] usb: usb3503: Fix probing on Arndale board (missing phy)

[RFT 0/3] usb: usb3503: Fix probing on Arndale board (missing phy)

[Krzysztof Kozlowski]

Hi,


Introduction
============
This patchset tries to fix probing of usb3503 on Arndale board
if the Samsung PHY driver is probed later (or built as a module).

*The patchset was not tested on Arndale board.*
I don't have that board. Please test it and say if the usb3503 deferred probe
works fine and the issue is solved.

The patchset was tested on Odroid U3 board (which is different!)
in a simulated environment. It is not sufficient testing.


Difference
==========
The usb3503 device driver can be used as a I2C device (on Odroid U3)
or as a platform device connected through phy (on Arndale). In the second
case the necessary phy reference has to be obtained and enabled.

For some details please look also at thread [0][1].

[0] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/348524.html
[1] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/348875.html


Best regards,
Krzysztof


Krzysztof Kozlowski (3):
  dt-bindings: usb: usb5303: Document new 'phys' property
  usb: misc: usb3503: Allow usage of device through phy interface
  ARM: dts: Fix usb3503 probe by enabling phy on exynos5250-arndale

 Documentation/devicetree/bindings/usb/usb3503.txt |  4 ++
 arch/arm/boot/dts/exynos5250-arndale.dts          |  2 +
 drivers/usb/misc/usb3503.c                        | 65 +++++++++++++++++++++++
 3 files changed, 71 insertions(+)

-- 
1.9.1

[RFT 1/3] dt-bindings: usb: usb5303: Document new 'phys' property

[Krzysztof Kozlowski]

Document new 'phys' and 'phys-names' properties.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Kevin Hilman <khilman@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: riku.voipio@linaro.org
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
---
 Documentation/devicetree/bindings/usb/usb3503.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/usb3503.txt b/Documentation/devicetree/bindings/usb/usb3503.txt
index 52493b1480e2..773c8d722c13 100644
--- a/Documentation/devicetree/bindings/usb/usb3503.txt
+++ b/Documentation/devicetree/bindings/usb/usb3503.txt
@@ -15,6 +15,8 @@ Optional properties:
 - reset-gpios: Should specify GPIO for reset.
 - initial-mode: Should specify initial mode.
                 (1 for HUB mode, 2 for STANDBY mode)
+- phys: One PHY specifier (refer to generic PHY bindings).
+- phy-names: If 'phys' is present, then it must be 'usb2-phy'.
 - refclk: Clock used for driving REFCLK signal (optional, if not provided
 	the driver assumes that clock signal is always available, its
 	rate is specified by REF_SEL pins and a value from the primary
@@ -33,4 +35,6 @@ Examples:
 		intn-gpios = <&gpx3 4 1>;
 		reset-gpios = <&gpx3 5 1>;
 		initial-mode = <1>;
+		phys = <&usb2_phy_gen 3>;
+		phy-names = "usb2-phy";
 	};
-- 
1.9.1

[RFT 2/3] usb: misc: usb3503: Allow usage of device through phy interface

[Krzysztof Kozlowski]

The USB3503 hub controller can be connected through I2C interface (e.g.
on Odroid-U3 board) or directly by phy (e.g. on Arndale board). Thus the
usb3503 driver can act as a i2c or platform device.

In the second configuration (phy) the driver did not get a reference to
necessary phy to use it. This lead to probe failure if PHY driver was
probed after usb3503 probe.

The patch adds support for generic phy framework so the driver will the
phy reference (if provided) and use it.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reported-by: Kevin Hilman <khilman@kernel.org>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Cc: Kevin Hilman <khilman@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: riku.voipio@linaro.org
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
---
 drivers/usb/misc/usb3503.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)

diff --git a/drivers/usb/misc/usb3503.c b/drivers/usb/misc/usb3503.c
index 64ff5b91752d..e9423fc28105 100644
--- a/drivers/usb/misc/usb3503.c
+++ b/drivers/usb/misc/usb3503.c
@@ -27,6 +27,7 @@
 #include <linux/of_gpio.h>
 #include <linux/platform_device.h>
 #include <linux/platform_data/usb3503.h>
+#include <linux/phy/phy.h>
 #include <linux/regmap.h>
 
 #define USB3503_VIDL		0x00
@@ -59,6 +60,7 @@ struct usb3503 {
 	struct regmap		*regmap;
 	struct device		*dev;
 	struct clk		*clk;
+	struct phy		*phy;
 	u8	port_off_mask;
 	int	gpio_intn;
 	int	gpio_reset;
@@ -66,6 +68,29 @@ struct usb3503 {
 	bool	secondary_ref_clk;
 };
 
+static int usb3503_phy_on(struct usb3503 *hub)
+{
+	int err;
+
+	err = phy_power_on(hub->phy);
+	if (err)
+		return err;
+
+	err = phy_init(hub->phy);
+	if (err) {
+		phy_power_off(hub->phy);
+		return err;
+	}
+
+	return 0;
+}
+
+static void usb3503_phy_off(struct usb3503 *hub)
+{
+	phy_exit(hub->phy);
+	phy_power_off(hub->phy);
+}
+
 static int usb3503_reset(struct usb3503 *hub, int state)
 {
 	if (!state && gpio_is_valid(hub->gpio_connect))
@@ -189,6 +214,13 @@ static int usb3503_probe(struct usb3503 *hub)
 		u32 rate = 0;
 		hub->port_off_mask = 0;
 
+		hub->phy = devm_phy_optional_get(dev, "usb2-phy");
+		if (IS_ERR(hub->phy)) {
+			err = PTR_ERR(hub->phy);
+			if (err != -EPROBE_DEFER)
+				dev_err(dev, "unable to get phy: %d\n", err);
+			return err;
+		}
 		if (!of_property_read_u32(np, "refclk-frequency", &rate)) {
 			switch (rate) {
 			case 38400000:
@@ -300,6 +332,10 @@ static int usb3503_probe(struct usb3503 *hub)
 		}
 	}
 
+	err = usb3503_phy_on(hub);
+	if (err)
+		return err;
+
 	usb3503_switch_mode(hub, hub->mode);
 
 	dev_info(dev, "%s: probed in %s mode\n", __func__,
@@ -339,9 +375,29 @@ static int usb3503_platform_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	hub->dev = &pdev->dev;
 
+	platform_set_drvdata(pdev, hub);
+
 	return usb3503_probe(hub);
 }
 
+static int usb3503_i2c_remove(struct i2c_client *i2c)
+{
+	struct usb3503 *hub = i2c_get_clientdata(i2c);
+
+	usb3503_phy_off(hub);
+
+	return 0;
+}
+
+static int usb3503_platform_remove(struct platform_device *pdev)
+{
+	struct usb3503 *hub = platform_get_drvdata(pdev);
+
+	usb3503_phy_off(hub);
+
+	return 0;
+}
+
 #ifdef CONFIG_PM_SLEEP
 static int usb3503_i2c_suspend(struct device *dev)
 {
@@ -350,6 +406,8 @@ static int usb3503_i2c_suspend(struct device *dev)
 
 	usb3503_switch_mode(hub, USB3503_MODE_STANDBY);
 
+	usb3503_phy_off(hub);
+
 	if (hub->clk)
 		clk_disable_unprepare(hub->clk);
 
@@ -360,10 +418,15 @@ static int usb3503_i2c_resume(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	struct usb3503 *hub = i2c_get_clientdata(client);
+	int err;
 
 	if (hub->clk)
 		clk_prepare_enable(hub->clk);
 
+	err = usb3503_phy_on(hub);
+	if (err)
+		return err;
+
 	usb3503_switch_mode(hub, hub->mode);
 
 	return 0;
@@ -395,6 +458,7 @@ static struct i2c_driver usb3503_i2c_driver = {
 		.of_match_table = of_match_ptr(usb3503_of_match),
 	},
 	.probe		= usb3503_i2c_probe,
+	.remove		= usb3503_i2c_remove,
 	.id_table	= usb3503_id,
 };
 
@@ -404,6 +468,7 @@ static struct platform_driver usb3503_platform_driver = {
 		.of_match_table = of_match_ptr(usb3503_of_match),
 	},
 	.probe		= usb3503_platform_probe,
+	.remove		= usb3503_platform_remove,
 };
 
 static int __init usb3503_init(void)
-- 
1.9.1

[RFT 3/3] ARM: dts: Fix usb3503 probe by enabling phy on exynos5250-arndale

[Krzysztof Kozlowski]

On Arndale board (unlike Odroid U3) the USB3503 hub controller is
connected in phy mode (not through I2C). For successful probe it needs
to get reference to proper phy and enable it.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reported-by: Kevin Hilman <khilman@kernel.org>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Cc: Kevin Hilman <khilman@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: riku.voipio@linaro.org
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
---
 arch/arm/boot/dts/exynos5250-arndale.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5250-arndale.dts b/arch/arm/boot/dts/exynos5250-arndale.dts
index c000532c1444..e213f31acbf3 100644
--- a/arch/arm/boot/dts/exynos5250-arndale.dts
+++ b/arch/arm/boot/dts/exynos5250-arndale.dts
@@ -114,6 +114,8 @@
 
 		reset-gpios = <&gpx3 5 GPIO_ACTIVE_LOW>;
 		connect-gpios = <&gpd1 7 GPIO_ACTIVE_LOW>;
+		phys = <&usb2_phy_gen 3>;
+		phy-names = "usb2-phy";
 	};
 };
 
-- 
1.9.1

Re: [RFT 0/3] usb: usb3503: Fix probing on Arndale board (missing phy)

[Marek Szyprowski]

Hello,

On 2015-10-07 02:30, Krzysztof Kozlowski wrote:
> Introduction
> ============
> This patchset tries to fix probing of usb3503 on Arndale board
> if the Samsung PHY driver is probed later (or built as a module).
>
> *The patchset was not tested on Arndale board.*
> I don't have that board. Please test it and say if the usb3503 deferred probe
> works fine and the issue is solved.
>
> The patchset was tested on Odroid U3 board (which is different!)
> in a simulated environment. It is not sufficient testing.
>
>
> Difference
> ==========
> The usb3503 device driver can be used as a I2C device (on Odroid U3)
> or as a platform device connected through phy (on Arndale). In the second
> case the necessary phy reference has to be obtained and enabled.
>
> For some details please look also at thread [0][1].
>
> [0] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/348524.html
> [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/348875.html
>

I'm not sure that this is the correct approach. usb3503 chip is simply 
connected
to Exynos USB2 phy, so it visible on the USB bus. The real driver that 
controls USB2
PHY is Exynos EHCI driver and USB3503 should not mess around it.

In my opinion all that is needed in case of Arndale board is forcing 
reset of
usb3503 chip after successful EHCI and USB2 PHY initialization (for some 
reason
initialization of usb3503 chip must be done after usb host initialization).
However I have no idea which driver should trigger this reset. Right now 
I didn't
find any good solution for additional control for devices which are on 
autoprobed
bus like usb.

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland

Re: [RFT 0/3] usb: usb3503: Fix probing on Arndale board (missing phy)

[Krzysztof Kozlowski]

On 07.10.2015 23:26, Marek Szyprowski wrote:
> Hello,
> 
> On 2015-10-07 02:30, Krzysztof Kozlowski wrote:
>> Introduction
>> ============
>> This patchset tries to fix probing of usb3503 on Arndale board
>> if the Samsung PHY driver is probed later (or built as a module).
>>
>> *The patchset was not tested on Arndale board.*
>> I don't have that board. Please test it and say if the usb3503
>> deferred probe
>> works fine and the issue is solved.
>>
>> The patchset was tested on Odroid U3 board (which is different!)
>> in a simulated environment. It is not sufficient testing.
>>
>>
>> Difference
>> ==========
>> The usb3503 device driver can be used as a I2C device (on Odroid U3)
>> or as a platform device connected through phy (on Arndale). In the second
>> case the necessary phy reference has to be obtained and enabled.
>>
>> For some details please look also at thread [0][1].
>>
>> [0]
>> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/348524.html
>>
>> [1]
>> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/348875.html
>>
>>

> 
> I'm not sure that this is the correct approach. usb3503 chip is simply
> connected
> to Exynos USB2 phy, so it visible on the USB bus. The real driver that
> controls USB2
> PHY is Exynos EHCI driver and USB3503 should not mess around it.

The ehci node (usb@12110000) has one port configured and it takes one
PHY reference (phy of id 1 - USB host). I can't see driver taking
reference to HSIC0 or HSIC1 phys... Since I cannot diagnose the error I
don't know what is really expected here.

> 
> In my opinion all that is needed in case of Arndale board is forcing
> reset of
> usb3503 chip after successful EHCI and USB2 PHY initialization (for some
> reason
> initialization of usb3503 chip must be done after usb host initialization).
> However I have no idea which driver should trigger this reset. Right now
> I didn't
> find any good solution for additional control for devices which are on
> autoprobed
> bus like usb.

The reset is done at the end of usb3503's probe. The question "why
usb3503 has to be initialized after EHCI and USB PHY" is still valid...

Anyway thanks for feedback! I really appreciate it.

Best regards,
Krzysztof

Re: [RFT 0/3] usb: usb3503: Fix probing on Arndale board (missing phy)

[Marek Szyprowski]

Hello,

On 2015-10-08 08:02, Krzysztof Kozlowski wrote:
> On 07.10.2015 23:26, Marek Szyprowski wrote:
>> Hello,
>>
>> On 2015-10-07 02:30, Krzysztof Kozlowski wrote:
>>> Introduction
>>> ============
>>> This patchset tries to fix probing of usb3503 on Arndale board
>>> if the Samsung PHY driver is probed later (or built as a module).
>>>
>>> *The patchset was not tested on Arndale board.*
>>> I don't have that board. Please test it and say if the usb3503
>>> deferred probe
>>> works fine and the issue is solved.
>>>
>>> The patchset was tested on Odroid U3 board (which is different!)
>>> in a simulated environment. It is not sufficient testing.
>>>
>>>
>>> Difference
>>> ==========
>>> The usb3503 device driver can be used as a I2C device (on Odroid U3)
>>> or as a platform device connected through phy (on Arndale). In the second
>>> case the necessary phy reference has to be obtained and enabled.
>>>
>>> For some details please look also at thread [0][1].
>>>
>>> [0]
>>> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/348524.html
>>>
>>> [1]
>>> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/348875.html
>>>
>>>
>> I'm not sure that this is the correct approach. usb3503 chip is simply
>> connected
>> to Exynos USB2 phy, so it visible on the USB bus. The real driver that
>> controls USB2
>> PHY is Exynos EHCI driver and USB3503 should not mess around it.
> The ehci node (usb@12110000) has one port configured and it takes one
> PHY reference (phy of id 1 - USB host). I can't see driver taking
> reference to HSIC0 or HSIC1 phys... Since I cannot diagnose the error I
> don't know what is really expected here.

It looks that EHCI in Exynos 5250 and 5420 still use old phy bindings. For
the reference, see Exynos4 dts and exynos4412-odroidu3.dts to check how 
to enable
more than one USB port (Odroid U3 has both HSIC ports enabled).

>
>> In my opinion all that is needed in case of Arndale board is forcing
>> reset of
>> usb3503 chip after successful EHCI and USB2 PHY initialization (for some
>> reason
>> initialization of usb3503 chip must be done after usb host initialization).
>> However I have no idea which driver should trigger this reset. Right now
>> I didn't
>> find any good solution for additional control for devices which are on
>> autoprobed
>> bus like usb.
> The reset is done at the end of usb3503's probe. The question "why
> usb3503 has to be initialized after EHCI and USB PHY" is still valid...

I remember that I saw some code to reset HSIC device after phy power on 
in case
of HSIC-connected modem chip, so maybe this is somehow common for HSIC chips
(which are some special case of 'embedded usb').

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland

Re: [RFT 0/3] usb: usb3503: Fix probing on Arndale board (missing phy)

[Javier Martinez Canillas]

Hello,

On 10/08/2015 08:23 AM, Marek Szyprowski wrote:
> Hello,
> 
> On 2015-10-08 08:02, Krzysztof Kozlowski wrote:
>> On 07.10.2015 23:26, Marek Szyprowski wrote:
>>> Hello,
>>>
>>> On 2015-10-07 02:30, Krzysztof Kozlowski wrote:
>>>> Introduction
>>>> ============
>>>> This patchset tries to fix probing of usb3503 on Arndale board
>>>> if the Samsung PHY driver is probed later (or built as a module).
>>>>
>>>> *The patchset was not tested on Arndale board.*
>>>> I don't have that board. Please test it and say if the usb3503
>>>> deferred probe
>>>> works fine and the issue is solved.
>>>>
>>>> The patchset was tested on Odroid U3 board (which is different!)
>>>> in a simulated environment. It is not sufficient testing.
>>>>
>>>>
>>>> Difference
>>>> ==========
>>>> The usb3503 device driver can be used as a I2C device (on Odroid U3)
>>>> or as a platform device connected through phy (on Arndale). In the second
>>>> case the necessary phy reference has to be obtained and enabled.
>>>>
>>>> For some details please look also at thread [0][1].
>>>>
>>>> [0]
>>>> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/348524.html
>>>>
>>>> [1]
>>>> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/348875.html
>>>>
>>>>
>>> I'm not sure that this is the correct approach. usb3503 chip is simply
>>> connected
>>> to Exynos USB2 phy, so it visible on the USB bus. The real driver that
>>> controls USB2
>>> PHY is Exynos EHCI driver and USB3503 should not mess around it.
>> The ehci node (usb@12110000) has one port configured and it takes one
>> PHY reference (phy of id 1 - USB host). I can't see driver taking
>> reference to HSIC0 or HSIC1 phys... Since I cannot diagnose the error I
>> don't know what is really expected here.
> 
> It looks that EHCI in Exynos 5250 and 5420 still use old phy bindings. For
> the reference, see Exynos4 dts and exynos4412-odroidu3.dts to check how to enable
> more than one USB port (Odroid U3 has both HSIC ports enabled).
> 
>>
>>> In my opinion all that is needed in case of Arndale board is forcing
>>> reset of
>>> usb3503 chip after successful EHCI and USB2 PHY initialization (for some
>>> reason
>>> initialization of usb3503 chip must be done after usb host initialization).
>>> However I have no idea which driver should trigger this reset. Right now
>>> I didn't
>>> find any good solution for additional control for devices which are on
>>> autoprobed
>>> bus like usb.
>> The reset is done at the end of usb3503's probe. The question "why
>> usb3503 has to be initialized after EHCI and USB PHY" is still valid...
> 
> I remember that I saw some code to reset HSIC device after phy power on in case
> of HSIC-connected modem chip, so maybe this is somehow common for HSIC chips
> (which are some special case of 'embedded usb').
>

I also don't have an Arndale board and haven't followed the thread to closely
but I just wanted to mention that the ChromiumOS 3.8 tree has a workaround to
reset the HSIC phys:

https://chromium.googlesource.com/chromiumos/third_party/kernel/+/81685c447954a29d1098268776582457258dd98f%5E%21/

and later a "supports-hsicphy-reset" DT property was added to force the reset
per board instead of unconditionally:

https://chromium.googlesource.com/chromiumos/third_party/kernel/+/a4d1c1a223ffa1ed38a4257d0378ca70c6667be0%5E%21/

Best regards,
-- 
Javier Martinez Canillas
Open Source Group
Samsung Research America

Re: [RFT 0/3] usb: usb3503: Fix probing on Arndale board (missing phy)

[Marek Szyprowski]

Hello,

On 2015-10-08 11:35, Javier Martinez Canillas wrote:
> Hello,
>
> On 10/08/2015 08:23 AM, Marek Szyprowski wrote:
>> Hello,
>>
>> On 2015-10-08 08:02, Krzysztof Kozlowski wrote:
>>> On 07.10.2015 23:26, Marek Szyprowski wrote:
>>>> Hello,
>>>>
>>>> On 2015-10-07 02:30, Krzysztof Kozlowski wrote:
>>>>> Introduction
>>>>> ============
>>>>> This patchset tries to fix probing of usb3503 on Arndale board
>>>>> if the Samsung PHY driver is probed later (or built as a module).
>>>>>
>>>>> *The patchset was not tested on Arndale board.*
>>>>> I don't have that board. Please test it and say if the usb3503
>>>>> deferred probe
>>>>> works fine and the issue is solved.
>>>>>
>>>>> The patchset was tested on Odroid U3 board (which is different!)
>>>>> in a simulated environment. It is not sufficient testing.
>>>>>
>>>>>
>>>>> Difference
>>>>> ==========
>>>>> The usb3503 device driver can be used as a I2C device (on Odroid U3)
>>>>> or as a platform device connected through phy (on Arndale). In the second
>>>>> case the necessary phy reference has to be obtained and enabled.
>>>>>
>>>>> For some details please look also at thread [0][1].
>>>>>
>>>>> [0]
>>>>> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/348524.html
>>>>>
>>>>> [1]
>>>>> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/348875.html
>>>>>
>>>>>
>>>> I'm not sure that this is the correct approach. usb3503 chip is simply
>>>> connected
>>>> to Exynos USB2 phy, so it visible on the USB bus. The real driver that
>>>> controls USB2
>>>> PHY is Exynos EHCI driver and USB3503 should not mess around it.
>>> The ehci node (usb@12110000) has one port configured and it takes one
>>> PHY reference (phy of id 1 - USB host). I can't see driver taking
>>> reference to HSIC0 or HSIC1 phys... Since I cannot diagnose the error I
>>> don't know what is really expected here.
>> It looks that EHCI in Exynos 5250 and 5420 still use old phy bindings. For
>> the reference, see Exynos4 dts and exynos4412-odroidu3.dts to check how to enable
>> more than one USB port (Odroid U3 has both HSIC ports enabled).
>>
>>>> In my opinion all that is needed in case of Arndale board is forcing
>>>> reset of
>>>> usb3503 chip after successful EHCI and USB2 PHY initialization (for some
>>>> reason
>>>> initialization of usb3503 chip must be done after usb host initialization).
>>>> However I have no idea which driver should trigger this reset. Right now
>>>> I didn't
>>>> find any good solution for additional control for devices which are on
>>>> autoprobed
>>>> bus like usb.
>>> The reset is done at the end of usb3503's probe. The question "why
>>> usb3503 has to be initialized after EHCI and USB PHY" is still valid...
>> I remember that I saw some code to reset HSIC device after phy power on in case
>> of HSIC-connected modem chip, so maybe this is somehow common for HSIC chips
>> (which are some special case of 'embedded usb').
>>
> I also don't have an Arndale board and haven't followed the thread to closely
> but I just wanted to mention that the ChromiumOS 3.8 tree has a workaround to
> reset the HSIC phys:
>
> https://chromium.googlesource.com/chromiumos/third_party/kernel/+/81685c447954a29d1098268776582457258dd98f%5E%21/
>
> and later a "supports-hsicphy-reset" DT property was added to force the reset
> per board instead of unconditionally:
>
> https://chromium.googlesource.com/chromiumos/third_party/kernel/+/a4d1c1a223ffa1ed38a4257d0378ca70c6667be0%5E%21/

I didn't check this approach, but for me it looks that the problem is caused
by the lack of resetting the chip connected to hsic phy not the lack of
resetting the phy itself. However this is pure speculation and one should
check it with the real hardware.

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland

Re: [RFT 0/3] usb: usb3503: Fix probing on Arndale board (missing phy)

[Kevin Hilman]

[-- Attachment #1: Type: text/plain, Size: 590 bytes --]

Hi Krzystof,

Krzysztof Kozlowski <k.kozlowski@samsung.com> writes:

> Introduction
> ============
> This patchset tries to fix probing of usb3503 on Arndale board
> if the Samsung PHY driver is probed later (or built as a module).
>
> *The patchset was not tested on Arndale board.*
> I don't have that board. Please test it and say if the usb3503 deferred probe
> works fine and the issue is solved.

FYI... I built this series on top of  next-20151009 and using
exynos_defconfig.  I booted it on my arndale, and I still don't see the
networking come up.  Full boot log attached.

Kevin


[-- Attachment #2: boot-arndale.txt --]
[-- Type: text/plain, Size: 27548 bytes --]

Connected to arndale console [channel connected] (~$quit to exit)
(user:khilman) is already connected


# PYBOOT: console: connected.
~$hardreset

Command(arndale console)> hardreset
(user:khilman) Reboot arndale


U-Boot 2013.01.-rc1-dirty (Jun 28 2013 - 07:14:48) for ARNDALE5250

CPU:Exynos5250@1000MHz

Board:  for ARNDALE5250
I2C:   ready
DRAM:  2 GiB
WARNING: Caches not enabled

Checking Boot Mode ... SDMMC
MMC:   EXYNOS DWMMC: 0, EXYNOS DWMMC: 1, EXYNOS DWMMC: 2
In:    serial
Out:   serial
Err:   serial
Net:   No ethernet found.
(Re)start USB...
USB0:   USB EHCI 1.00
scanning bus 0 for devices... 4 USB Device(s) found
       scanning usb for storage devices... 0 Storage Device(s) found
       scanning usb for ethernet devices... 1 Ethernet Device(s) found
Hit any key to stop autoboot: 

# PYBOOT: u-boot: taking control.
 3  0 
ARNDALE5250 # 
ARNDALE5250 # version
version

U-Boot 2013.01.-rc1-dirty (Jun 28 2013 - 07:14:48) for ARNDALE5250
arm-linux-gnueabi-gcc (Ubuntu/Linaro 4.7.2-1ubuntu1) 4.7.2
GNU ld (GNU Binutils for Ubuntu) 2.22.90.20120919
ARNDALE5250 # setenv bootargs console=tty0 console=ttySAC2,115200n8 rw root=/dev/mmcblk1p3 rootwait rootfstype=ext4
setenv bootargs console=tty0 console=ttySAC2,115200n8 rw root=/dev/mmcblk1p3 rootwait rootfstype=ext4
ARNDALE5250 # setenv netargs 'setenv bootargs ${bootargs} "ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:::none:192.168.1.3"'
setenv netargs 'setenv bootargs ${bootargs} "ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:::none:192.168.1.3"'
ARNDALE5250 # if test -n ${initenv}; then run initenv; fi
if test -n ${initenv}; then run initenv; fi
ARNDALE5250 # if test -n ${preboot}; then run preboot; fi
if test -n ${preboot}; then run preboot; fi
(Re)start USB...
USB0:   USB EHCI 1.00
scanning bus 0 for devices... 4 USB Device(s) found
       scanning usb for storage devices... 0 Storage Device(s) found
       scanning usb for ethernet devices... 1 Ethernet Device(s) found
ARNDALE5250 # setenv autoload no; setenv autoboot no
setenv autoload no; setenv autoboot no
ARNDALE5250 #dhcp
 dhcp
Waiting for Ethernet connection... done.
BOOTP broadcast 1
DHCP client bound to address 192.168.1.167
ARNDALE5250 #setenv serverip 192.168.1.2
 setenv serverip 192.168.1.2
ARNDALE5250 # if test -n ${netargs}; then run netargs; fi
if test -n ${netargs}; then run netargs; fi
ARNDALE5250 # tftp 0x41000000 192.168.1.2:tmp/arndale-o13inu/zImage
tftp 0x41000000 192.168.1.2:tmp/arndale-o13inu/zImage
Waiting for Ethernet connection... done.
Using asx0 device
TFTP from server 192.168.1.2; our IP address is 192.168.1.167
Filename 'tmp/arndale-o13inu/zImage'.
Load address: 0x41000000
Loading: *#################################################################
 #################################################################
 #################################################################
 #################################################################
 ###########################
done
Bytes transferred = 4209056 (4039a0 hex)
ARNDALE5250 # tftp 0x42000000 192.168.1.2:tmp/arndale-o13inu/initrd-vFFjKf.cpio.gz
tftp 0x42000000 192.168.1.2:tmp/arndale-o13inu/initrd-vFFjKf.cpio.gz
Waiting for Ethernet connection... done.
Using asx0 device
TFTP from server 192.168.1.2; our IP address is 192.168.1.167
Filename 'tmp/arndale-o13inu/initrd-vFFjKf.cpio.gz'.
Load address: 0x42000000
Loading: *#################################################################
 #################################################################
 #################################################################
 #################################################################
 #################################################################
 ################
done
Bytes transferred = 5001043 (4c4f53 hex)
ARNDALE5250 #tftp 0x41f00000 192.168.1.2:tmp/arndale-o13inu/tmp_2g_yE.dtb
 tftp 0x41f00000 192.168.1.2:tmp/arndale-o13inu/tmp_2g_yE.dtb
Waiting for Ethernet connection... done.
Using asx0 device
TFTP from server 192.168.1.2; our IP address is 192.168.1.167
Filename 'tmp/arndale-o13inu/tmp_2g_yE.dtb'.
Load address: 0x41f00000
Loading: *###
done
Bytes transferred = 42207 (a4df hex)
ARNDALE5250 # printenv bootargs
printenv bootargs
bootargs=console=tty0 console=ttySAC2,115200n8 rw root=/dev/mmcblk1p3 rootwait rootfstype=ext4 ip=192.168.1.167:192.168.1.2:192.168.1.254:255.255.255.0:::none:192.168.1.3
ARNDALE5250 #bootz 0x41000000 - 0x41f00000

# PYBOOT: u-boot: jumping to kernel image
 bootz 0x41000000 - 0x41f00000
## Flattened Device Tree blob at 41f00000
   Booting using the fdt blob at 0x41f00000
   Using Device Tree in place at 41f00000, end 41f0d4de

Starting kernel ...

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.3.0-rc4-next-20151009-06709-g4b92b96f4ad7 (khilman@paris) (gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-12ubuntu1) ) #15 SMP PREEMPT Fri Oct 9 11:32:11 PDT 2015
[    0.000000] CPU: ARMv7 Processor [410fc0f4] revision 4 (ARMv7), cr=10c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache
[    0.000000] Machine model: Insignal Arndale evaluation board based on EXYNOS5250
[    0.000000] cma: Reserved 64 MiB at 0xbc000000
[    0.000000] Memory policy: Data cache writealloc
[    0.000000] Samsung CPU ID: 0x43520010
[    0.000000] PERCPU: Embedded 12 pages/cpu @eefaa000 s18880 r8192 d22080 u49152
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 518656
[    0.000000] Kernel command line: console=tty0 console=ttySAC2,115200n8 rw root=/dev/mmcblk1p3 rootwait rootfstype=ext4 ip=192.168.1.167:192.168.1.2:192.168.1.254:255.255.255.0:::none:192.168.1.3
[    0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)
[    0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
[    0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
[    0.000000] Memory: 1984248K/2080768K available (5642K kernel code, 238K rwdata, 2020K rodata, 424K init, 315K bss, 30984K reserved, 65536K cma-reserved, 1245184K highmem)
[    0.000000] Virtual kernel memory layout:
[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
[    0.000000]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
[    0.000000]     vmalloc : 0xf0800000 - 0xff800000   ( 240 MB)
[    0.000000]     lowmem  : 0xc0000000 - 0xf0000000   ( 768 MB)
[    0.000000]     pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
[    0.000000]     modules : 0xbf000000 - 0xbfe00000   (  14 MB)
[    0.000000]       .text : 0xc0008000 - 0xc0783e2c   (7664 kB)
[    0.000000]       .init : 0xc0784000 - 0xc07ee000   ( 424 kB)
[    0.000000]       .data : 0xc07ee000 - 0xc0829ac0   ( 239 kB)
[    0.000000]        .bss : 0xc082c000 - 0xc087ac98   ( 316 kB)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[    0.000000] Preemptible hierarchical RCU implementation.
[    0.000000] Build-time adjustment of leaf fanout to 32.
[    0.000000] RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2.
[    0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=32, nr_cpu_ids=2
[    0.000000] NR_IRQS:16 nr_irqs:16 16
[    0.000000] GIC physical location is 0x10481000
[    0.000000] L2C: failed to init: -19
[    0.000000] Exynos5250: clock setup completed, armclk=1000000000
[    0.000000] Architected cp15 timer(s) running at 24.00MHz (phys).
[    0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x588fe9dc0, max_idle_ns: 440795202592 ns
[    0.000000] sched_clock: 56 bits at 24MHz, resolution 41ns, wraps every 4398046511097ns
[    0.000000] Switching to timer-based delay loop, resolution 41ns
[    0.000005] Ignoring duplicate/late registration of read_current_timer delay
[    0.000019] clocksource: mct-frc: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 79635851949 ns
[    0.000036] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 89478484971ns
[    0.000500] Console: colour dummy device 80x30
[    0.001021] console [tty0] enabled
[    0.001050] Calibrating delay loop (skipped), value calculated using timer frequency.. 48.00 BogoMIPS (lpj=120000)
[    0.001088] pid_max: default: 32768 minimum: 301
[    0.001255] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes)
[    0.001279] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes)
[    0.001883] CPU: Testing write buffer coherency: ok
[    0.002098] CPU0: update cpu_capacity 1024
[    0.002120] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.002237] Setting up static identity map for 0x40008280 - 0x400082d8
[    0.045354] CPU1: update cpu_capacity 1024
[    0.045359] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[    0.045430] Brought up 2 CPUs
[    0.045476] SMP: Total of 2 processors activated (96.00 BogoMIPS).
[    0.045493] CPU: All CPU(s) started in HYP mode.
[    0.045509] CPU: Virtualization extensions available.
[    0.046537] devtmpfs: initialized
[    0.062748] VFP support v0.3: implementor 41 architecture 4 part 30 variant f rev 0
[    0.063475] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 9556302231375000 ns
[    0.064645] pinctrl core: initialized pinctrl subsystem
[    0.065743] NET: Registered protocol family 16
[    0.066740] DMA: preallocated 256 KiB pool for atomic coherent allocations
[    0.080285] cpuidle: using governor ladder
[    0.095321] cpuidle: using governor menu
[    0.100126] exynos-audss-clk 3810000.audss-clock-controller: setup completed
[    0.167935] SCSI subsystem initialized
[    0.168227] usbcore: registered new interface driver usbfs
[    0.168314] usbcore: registered new interface driver hub
[    0.169201] usbcore: registered new device driver usb
[    0.170046] s3c-i2c 12c60000.i2c: slave address 0x66
[    0.170072] s3c-i2c 12c60000.i2c: bus frequency set to 18 KHz
[    0.491736] VDD_33ON_2.8V: Failed to create debugfs directory
[    0.647588] s3c-i2c 12c60000.i2c: i2c-0: S3C I2C adapter
[    0.647751] s3c-i2c 12c80000.i2c: slave address 0x50
[    0.647775] s3c-i2c 12c80000.i2c: bus frequency set to 65 KHz
[    0.648150] s3c-i2c 12c80000.i2c: i2c-2: S3C I2C adapter
[    0.648290] s3c-i2c 12c90000.i2c: slave address 0x00
[    0.648314] s3c-i2c 12c90000.i2c: bus frequency set to 65 KHz
[    0.648662] s3c-i2c 12c90000.i2c: i2c-3: S3C I2C adapter
[    0.648761] s3c-i2c 12ce0000.i2c: slave address 0x38
[    0.648783] s3c-i2c 12ce0000.i2c: bus frequency set to 65 KHz
[    0.649129] s3c-i2c 12ce0000.i2c: i2c-8: S3C I2C adapter
[    0.649236] s3c-i2c 121d0000.i2c: slave address 0x38
[    0.649258] s3c-i2c 121d0000.i2c: bus frequency set to 39 KHz
[    0.649552] s3c-i2c 121d0000.i2c: i2c-9: S3C I2C adapter
[    0.650097] s2mps11-clk s5m8767-clk: could not find clock sub-node
[    0.650130] s2mps11-clk: probe of s5m8767-clk failed with error -22
[    0.650516] Advanced Linux Sound Architecture Driver Initialized.
[    0.652521] clocksource: Switched to clocksource arch_sys_counter
[    0.664490] NET: Registered protocol family 2
[    0.664944] TCP established hash table entries: 8192 (order: 3, 32768 bytes)
[    0.665041] TCP bind hash table entries: 8192 (order: 5, 163840 bytes)
[    0.665217] TCP: Hash tables configured (established 8192 bind 8192)
[    0.665277] UDP hash table entries: 512 (order: 2, 24576 bytes)
[    0.665327] UDP-Lite hash table entries: 512 (order: 2, 24576 bytes)
[    0.665506] NET: Registered protocol family 1
[    0.665771] RPC: Registered named UNIX socket transport module.
[    0.665793] RPC: Registered udp transport module.
[    0.665809] RPC: Registered tcp transport module.
[    0.665824] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.666024] Trying to unpack rootfs image as initramfs...
[    0.938249] Freeing initrd memory: 4884K (c2000000 - c24c5000)
[    0.939603] futex hash table entries: 512 (order: 3, 32768 bytes)
[    0.952560] romfs: ROMFS MTD (C) 2007 Red Hat, Inc.
[    0.953717] bounce: pool size: 64 pages
[    0.953745] io scheduler noop registered
[    0.953770] io scheduler deadline registered
[    0.954005] io scheduler cfq registered (default)
[    0.956204] 12100000.phy supply vbus not found, using dummy regulator
[    0.956293] 12100000.phy supply vbus-boost not found, using dummy regulator
[    0.961350] dma-pl330 121a0000.pdma: Loaded driver for PL330 DMAC-241330
[    0.961381] dma-pl330 121a0000.pdma: DBUFF-32x4bytes Num_Chans-8 Num_Peri-32 Num_Events-32
[    0.964976] dma-pl330 121b0000.pdma: Loaded driver for PL330 DMAC-241330
[    0.965004] dma-pl330 121b0000.pdma: DBUFF-32x4bytes Num_Chans-8 Num_Peri-32 Num_Events-32
[    0.966057] dma-pl330 10800000.mdma: Loaded driver for PL330 DMAC-241330
[    0.966084] dma-pl330 10800000.mdma: DBUFF-64x8bytes Num_Chans-8 Num_Peri-1 Num_Events-32
[    0.967115] dma-pl330 11c10000.mdma: Loaded driver for PL330 DMAC-241330
[    0.967140] dma-pl330 11c10000.mdma: DBUFF-64x8bytes Num_Chans-8 Num_Peri-1 Num_Events-32
[    1.041727] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[    1.043705] 12c00000.serial: ttySAC0 at MMIO 0x12c00000 (irq = 56, base_baud = 0) is a S3C6400/10
[    1.044148] 12c10000.serial: ttySAC1 at MMIO 0x12c10000 (irq = 57, base_baud = 0) is a S3C6400/10
[    1.044549] 12c20000.serial: ttySAC2 at MMIO 0x12c20000 (irq = 58, base_baud = 0) is a S3C6400/10
[    1.804319] console [ttySAC2] enabled
[    1.808353] 12c30000.serial: ttySAC3 at MMIO 0x12c30000 (irq = 59, base_baud = 0) is a S3C6400/10
[    1.818298] [drm] Initialized drm 1.1.0 20060810
[    1.822549] of_graph_get_next_endpoint(): no port node found in /dp-controller@145B0000
[    1.839670] exynos-drm exynos-drm: bound 14400000.fimd (ops fimd_component_ops)
[    1.846168] exynos-drm exynos-drm: bound 145b0000.dp-controller (ops exynos_dp_ops)
[    1.853287] exynos-drm exynos-drm: bound 14450000.mixer (ops mixer_component_ops)
[    1.860856] exynos-drm exynos-drm: bound 14530000.hdmi (ops hdmi_component_ops)
[    1.867943] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    1.874528] [drm] No driver support for vblank timestamp query.
[    1.892099] Division by zero in kernel.
[    1.892108] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.3.0-rc4-next-20151009-06709-g4b92b96f4ad7 #15
[    1.892110] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
[    1.892131] [<c001554c>] (unwind_backtrace) from [<c00122e0>] (show_stack+0x10/0x14)
[    1.892145] [<c00122e0>] (show_stack) from [<c01f19b0>] (dump_stack+0x70/0xbc)
[    1.892157] [<c01f19b0>] (dump_stack) from [<c01f04f4>] (Ldiv0+0x8/0x10)
[    1.892168] [<c01f04f4>] (Ldiv0) from [<c02a672c>] (fimd_commit+0x1f0/0x2b0)
[    1.892178] [<c02a672c>] (fimd_commit) from [<c02a4000>] (exynos_drm_crtc_enable+0x1c/0x28)
[    1.892189] [<c02a4000>] (exynos_drm_crtc_enable) from [<c027f658>] (drm_atomic_helper_commit_modeset_enables+0x94/0x190)
[    1.892200] [<c027f658>] (drm_atomic_helper_commit_modeset_enables) from [<c02a3ac0>] (exynos_atomic_commit_complete+0x2c/0x1c4)
[    1.892209] [<c02a3ac0>] (exynos_atomic_commit_complete) from [<c02a3e94>] (exynos_atomic_commit+0x17c/0x1c4)
[    1.892219] [<c02a3e94>] (exynos_atomic_commit) from [<c02a0e90>] (drm_atomic_commit+0x40/0x64)
[    1.892229] [<c02a0e90>] (drm_atomic_commit) from [<c0281cf4>] (restore_fbdev_mode+0x2c8/0x2ec)
[    1.892240] [<c0281cf4>] (restore_fbdev_mode) from [<c0282c44>] (drm_fb_helper_restore_fbdev_mode_unlocked+0x2c/0x74)
[    1.892249] [<c0282c44>] (drm_fb_helper_restore_fbdev_mode_unlocked) from [<c0282cb8>] (drm_fb_helper_set_par+0x2c/0x54)
[    1.892259] [<c0282cb8>] (drm_fb_helper_set_par) from [<c0228fe0>] (fbcon_init+0x47c/0x4e4)
[    1.892268] [<c0228fe0>] (fbcon_init) from [<c025fc20>] (visual_init+0xb4/0x100)
[    1.892277] [<c025fc20>] (visual_init) from [<c0261bd8>] (do_bind_con_driver+0x134/0x350)
[    1.892286] [<c0261bd8>] (do_bind_con_driver) from [<c0261f64>] (do_take_over_console+0x170/0x1d8)
[    1.892295] [<c0261f64>] (do_take_over_console) from [<c02290ac>] (do_fbcon_takeover+0x64/0xcc)
[    1.892305] [<c02290ac>] (do_fbcon_takeover) from [<c003ce7c>] (notifier_call_chain+0x44/0x84)
[    1.892315] [<c003ce7c>] (notifier_call_chain) from [<c003d08c>] (__blocking_notifier_call_chain+0x48/0x60)
[    1.892324] [<c003d08c>] (__blocking_notifier_call_chain) from [<c003d0bc>] (blocking_notifier_call_chain+0x18/0x20)
[    1.892334] [<c003d0bc>] (blocking_notifier_call_chain) from [<c022e5e4>] (register_framebuffer+0x184/0x268)
[    1.892345] [<c022e5e4>] (register_framebuffer) from [<c0283850>] (drm_fb_helper_initial_config+0x24c/0x3fc)
[    1.892354] [<c0283850>] (drm_fb_helper_initial_config) from [<c02a4754>] (exynos_drm_fbdev_init+0xec/0x14c)
[    1.892362] [<c02a4754>] (exynos_drm_fbdev_init) from [<c02789ac>] (drm_kms_helper_hotplug_event+0x24/0x28)
[    1.892370] [<c02789ac>] (drm_kms_helper_hotplug_event) from [<c02791fc>] (drm_helper_hpd_irq_event+0xd0/0x158)
[    1.892377] [<c02791fc>] (drm_helper_hpd_irq_event) from [<c02a38c0>] (exynos_drm_load+0x140/0x15c)
[    1.892385] [<c02a38c0>] (exynos_drm_load) from [<c028bfc4>] (drm_dev_register+0xa0/0xb4)
[    1.892394] [<c028bfc4>] (drm_dev_register) from [<c028d950>] (drm_platform_init+0x40/0xd0)
[    1.892403] [<c028d950>] (drm_platform_init) from [<c02b61d0>] (try_to_bring_up_master.part.0+0xcc/0x108)
[    1.892412] [<c02b61d0>] (try_to_bring_up_master.part.0) from [<c02b62b4>] (component_master_add_with_match+0xa8/0x124)
[    1.892420] [<c02b62b4>] (component_master_add_with_match) from [<c02a399c>] (exynos_drm_platform_probe+0xc0/0xdc)
[    1.892429] [<c02a399c>] (exynos_drm_platform_probe) from [<c02bb9cc>] (platform_drv_probe+0x50/0xac)
[    1.892436] [<c02bb9cc>] (platform_drv_probe) from [<c02ba43c>] (driver_probe_device+0x1e0/0x2a0)
[    1.892443] [<c02ba43c>] (driver_probe_device) from [<c02ba588>] (__driver_attach+0x8c/0x90)
[    1.892451] [<c02ba588>] (__driver_attach) from [<c02b8b58>] (bus_for_each_dev+0x54/0x88)
[    1.892461] [<c02b8b58>] (bus_for_each_dev) from [<c02b9b1c>] (bus_add_driver+0xe8/0x1f4)
[    1.892469] [<c02b9b1c>] (bus_add_driver) from [<c02bad54>] (driver_register+0x78/0xf4)
[    1.892477] [<c02bad54>] (driver_register) from [<c02a3a50>] (exynos_drm_register_drivers+0x24/0x68)
[    1.892484] [<c02a3a50>] (exynos_drm_register_drivers) from [<c02a3ce4>] (exynos_drm_init+0x88/0xbc)
[    1.892492] [<c02a3ce4>] (exynos_drm_init) from [<c0009748>] (do_one_initcall+0x84/0x1d4)
[    1.892534] [<c0009748>] (do_one_initcall) from [<c0784d94>] (kernel_init_freeable+0x11c/0x1e8)
[    1.892545] [<c0784d94>] (kernel_init_freeable) from [<c0553968>] (kernel_init+0x8/0xec)
[    1.892554] [<c0553968>] (kernel_init) from [<c000f7b8>] (ret_from_fork+0x14/0x3c)
[    1.895349] exynos-dp 145b0000.dp-controller: failed to get hpd plug status
[    1.977198] Console: switching to colour frame buffer device 365x114
[    2.471635] exynos-drm exynos-drm: fb0:  frame buffer device
[    2.487526] [drm] Initialized exynos 1.0.0 20110530 on minor 0
[    2.508940] brd: module loaded
[    2.546839] loop: module loaded
[    2.549502] usbcore: registered new interface driver r8152
[    2.554136] usbcore: registered new interface driver asix
[    2.559482] usbcore: registered new interface driver ax88179_178a
[    2.565570] usbcore: registered new interface driver cdc_ether
[    2.571395] usbcore: registered new interface driver smsc75xx
[    2.577131] usbcore: registered new interface driver smsc95xx
[    2.582841] usbcore: registered new interface driver net1080
[    2.588478] usbcore: registered new interface driver cdc_subset
[    2.594376] usbcore: registered new interface driver zaurus
[    2.599967] usbcore: registered new interface driver cdc_ncm
[    2.606161] exynos-dwc3 usb@12000000: no suspend clk specified
[    2.611378] usb@12000000 supply vdd33 not found, using dummy regulator
[    2.617914] usb@12000000 supply vdd10 not found, using dummy regulator
[    2.827315] xhci-hcd xhci-hcd.2.auto: xHCI Host Controller
[    2.831429] xhci-hcd xhci-hcd.2.auto: new USB bus registered, assigned bus number 1
[    2.839448] xhci-hcd xhci-hcd.2.auto: hcc params 0x0220f04c hci version 0x100 quirks 0x00010010
[    2.847798] xhci-hcd xhci-hcd.2.auto: irq 140, io mem 0x12000000
[    2.853868] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[    2.860494] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    2.867701] usb usb1: Product: xHCI Host Controller
[    2.872533] usb usb1: Manufacturer: Linux 4.3.0-rc4-next-20151009-06709-g4b92b96f4ad7 xhci-hcd
[    2.881167] usb usb1: SerialNumber: xhci-hcd.2.auto
[    2.886652] hub 1-0:1.0: USB hub found
[    2.889736] hub 1-0:1.0: 1 port detected
[    2.894002] xhci-hcd xhci-hcd.2.auto: xHCI Host Controller
[    2.899133] xhci-hcd xhci-hcd.2.auto: new USB bus registered, assigned bus number 2
[    2.906825] usb usb2: We don't know the algorithms for LPM for this host, disabling LPM.
[    2.921596] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003
[    2.933658] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    2.946113] usb usb2: Product: xHCI Host Controller
[    2.956186] usb usb2: Manufacturer: Linux 4.3.0-rc4-next-20151009-06709-g4b92b96f4ad7 xhci-hcd
[    2.970073] usb usb2: SerialNumber: xhci-hcd.2.auto
[    2.980849] hub 2-0:1.0: USB hub found
[    2.989822] hub 2-0:1.0: 1 port detected
[    2.999427] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    3.011144] ehci-exynos: EHCI EXYNOS driver
[    3.020824] exynos-ehci 12110000.usb: EHCI Host Controller
[    3.031467] exynos-ehci 12110000.usb: new USB bus registered, assigned bus number 3
[    3.044463] exynos-ehci 12110000.usb: irq 103, io mem 0x12110000
[    3.062533] exynos-ehci 12110000.usb: USB 2.0 started, EHCI 1.00
[    3.073764] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002
[    3.085646] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    3.098058] usb usb3: Product: EHCI Host Controller
[    3.107995] usb usb3: Manufacturer: Linux 4.3.0-rc4-next-20151009-06709-g4b92b96f4ad7 ehci_hcd
[    3.121704] usb usb3: SerialNumber: 12110000.usb
[    3.132021] hub 3-0:1.0: USB hub found
[    3.140810] hub 3-0:1.0: 3 ports detected
[    3.150534] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    3.161717] ohci-exynos: OHCI EXYNOS driver
[    3.171047] exynos-ohci 12120000.usb: USB Host Controller
[    3.181389] exynos-ohci 12120000.usb: new USB bus registered, assigned bus number 4
[    3.194099] exynos-ohci 12120000.usb: irq 103, io mem 0x12120000
[    3.261693] usb usb4: New USB device found, idVendor=1d6b, idProduct=0001
[    3.273374] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    3.285460] usb usb4: Product: USB Host Controller
[    3.295090] usb usb4: Manufacturer: Linux 4.3.0-rc4-next-20151009-06709-g4b92b96f4ad7 ohci_hcd
[    3.308595] usb usb4: SerialNumber: 12120000.usb
[    3.318705] hub 4-0:1.0: USB hub found
[    3.327283] hub 4-0:1.0: 3 ports detected
[    3.336853] usbcore: registered new interface driver usb-storage
[    3.358155] usb3503 usb-hub: switched to HUB mode
[    3.367644] usb3503 usb-hub: usb3503_probe: probed in hub mode
[    3.378409] using random self ethernet address
[    3.387602] using random host ethernet address
[    3.397306] usb0: HOST MAC 1e:41:6c:8b:c0:f9
[    3.406230] usb0: MAC 9e:76:63:1e:59:7e
[    3.414608] using random self ethernet address
[    3.423557] using random host ethernet address
[    3.437554] g_ether gadget: Ethernet Gadget, version: Memorial Day 2008
[    3.448726] g_ether gadget: g_ether ready
[    3.457859] mousedev: PS/2 mouse device common for all mice
[    3.469234] s3c-rtc 101e0000.rtc: failed to find rtc source clock
[    3.479829] s3c-rtc: probe of 101e0000.rtc failed with error -2
[    3.519530] s5m-rtc s5m-rtc: rtc core: registered s5m-rtc as rtc0
[    3.531818] i2c /dev entries driver
[    3.543304] thermal thermal_zone0: failed to read out thermal zone (-22)
[    3.554515] 10060000.tmu supply vtmu not found, using dummy regulator
[    3.566502] s3c2410-wdt 101d0000.watchdog: watchdog inactive, reset disabled, irq disabled
[    3.580000] device-mapper: ioctl: 4.33.0-ioctl (2015-8-18) initialised: dm-devel@redhat.com
[    3.612983] sdhci: Secure Digital Host Controller Interface driver
[    3.621462] sdhci: Copyright(c) Pierre Ossman
[    3.628192] Synopsys Designware Multimedia Card Interface Driver
[    3.636912] dwmmc_exynos 12200000.mmc: IDMAC supports 32-bit address mode.
[    3.646032] dwmmc_exynos 12200000.mmc: Using internal DMA controller.
[    3.654648] dwmmc_exynos 12200000.mmc: Version ID is 241a
[    3.662202] dwmmc_exynos 12200000.mmc: DW MMC controller at irq 101,32 bit host data width,128 deep fifo
[    3.673931] dwmmc_exynos 12200000.mmc: No vqmmc regulator found
[    3.707555] dwmmc_exynos 12200000.mmc: 1 slots initialized
[    3.715351] dwmmc_exynos 12220000.mmc: IDMAC supports 32-bit address mode.
[    3.725349] dwmmc_exynos 12220000.mmc: Using internal DMA controller.
[    3.735818] dwmmc_exynos 12220000.mmc: Version ID is 241a
[    3.743247] dwmmc_exynos 12220000.mmc: DW MMC controller at irq 102,32 bit host data width,128 deep fifo
[    3.754752] dwmmc_exynos 12220000.mmc: No vqmmc regulator found
[    3.792543] dwmmc_exynos 12220000.mmc: 1 slots initialized
[    3.801233] usbcore: registered new interface driver usbhid
[    3.808806] usbhid: USB HID core driver
[    3.818199] NET: Registered protocol family 10
[    3.827239] mmc0: MAN_BKOPS_EN bit is not set
[    3.833735] sit: IPv6 over IPv4 tunneling driver
[    3.840806] NET: Registered protocol family 17
[    3.847175] mmc_host mmc0: Bus speed (slot 0) = 50000000Hz (slot req 52000000Hz, actual 50000000HZ div = 0)
[    3.858943] NET: Registered protocol family 15
[    3.865494] Registering SWP/SWPB emulation handler
[    3.872407] mmc_host mmc0: Bus speed (slot 0) = 100000000Hz (slot req 52000000Hz, actual 50000000HZ div = 1)
[    3.884734] mmc0: new DDR MMC card at address 0001
[    3.892214] input: gpio_keys as /devices/platform/gpio_keys/input/input0
[    3.906703] mmcblk0: mmc0:0001 M4G1FA 3.72 GiB 
[    3.913251] s5m-rtc s5m-rtc: setting system clock to 2000-10-05 10:17:10 UTC (970741030)
[    3.932554] mmcblk0boot0: mmc0:0001 M4G1FA partition 1 1.00 MiB
[    3.940672] IPv6: ADDRCONF(NETDEV_UP): usb0: link is not ready
[    3.953746] mmcblk0boot1: mmc0:0001 M4G1FA partition 2 1.00 MiB
[    3.966886] mmcblk0rpmb: mmc0:0001 M4G1FA partition 3 128 KiB
[    3.975783]  mmcblk0: p1 p2 p3 p4
[    4.016575] mmc_host mmc1: Bus speed (slot 0) = 50000000Hz (slot req 50000000Hz, actual 50000000HZ div = 0)
[    4.028560] mmc1: new high speed SDHC card at address 1234
[    4.041614] mmcblk1: mmc1:1234 SA04G 3.63 GiB 
[    4.049736]  mmcblk1: p1 p2 p3
[   13.947511] Waiting up to 110 more seconds for network.
[   23.952509] Waiting up to 100 more seconds for network.
[   33.957510] Waiting up to 90 more seconds for network.
[   43.962509] Waiting up to 80 more seconds for network.
[   53.967513] Waiting up to 70 more seconds for network.
[   63.972536] Waiting up to 60 more seconds for network.
[   73.982520] Waiting up to 50 more seconds for network.
[   83.987518] Waiting up to 40 more seconds for network.
~$off
# PYBOOT: Exception: kernel: ERROR: Timeout waiting for kernel to finish booting.
#
# PYBOOT: cmdline: pyboot -s -w -m modules.tar.xz arndale arch/arm/boot/zImage arch/arm/boot/dts/exynos5250-arndale.dtb
# PYBOOT: Time: 122.05 (bootloader: 28.87, setup: 0.19, kernel: 0.00)
# PYBOOT: Result: FAIL

Re: [RFT 0/3] usb: usb3503: Fix probing on Arndale board (missing phy)

[Krzysztof Kozlowski]

W dniu 10.10.2015 o 04:18, Kevin Hilman pisze:
> Hi Krzystof,
> 
> Krzysztof Kozlowski <k.kozlowski@samsung.com> writes:
> 
>> Introduction
>> ============
>> This patchset tries to fix probing of usb3503 on Arndale board
>> if the Samsung PHY driver is probed later (or built as a module).
>>
>> *The patchset was not tested on Arndale board.*
>> I don't have that board. Please test it and say if the usb3503 deferred probe
>> works fine and the issue is solved.
> 
> FYI... I built this series on top of  next-20151009 and using
> exynos_defconfig.  I booted it on my arndale, and I still don't see the
> networking come up.  Full boot log attached.

+cc Tyler

Kevin,
Thanks for testing but I am not sure if this boot failure is related to
the patch. I mean if the patch should fix this particular boot failure.
The board stopped to boot after enabling DWC2 and network USB gadget:
http://www.spinics.net/lists/linux-samsung-soc/msg47009.html

The boot log shows that usb3503 was probed but asix network adapter was
not. I wonder how these things are related to each other...

Nevertheless it would be difficult to debug the issue without the
Arndale board. :)

Best regards,
Krzysztof