Odroid c2 usb fixs

Some time ago I had tired to enable usb bus 1 for Odroid C2/C1 but it's look like some more work is needed to u-boot and usb_phy driver to initialize this port.

Below patches tries to address the issue regarding usb bus 2 (4 port) while disable the usb bus 1 on this board.

Prevoius patch
[0] https://lkml.org/lkml/2019/1/29/325
I have tried to split the patchs for now.

Anand Moon (3):
arm64: dts: meson: odroid-c2: p5v0 is the main 5V power input
arm64: dts: meson: odroid-c2: Add missing linking regulator to usb bus
arm64: dts: meson: odroid-c2: Disable usb_otg bus to avoid power
failed warning

 .../boot/dts/amlogic/meson-gxbb-odroidc2.dts  | 20 +++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

2.23.0

As per the schematic Monolithic Power Systems MP2161GJ-C499 supply a fixed output voltage of 5.0V. This supplies linked to VDD_EE, HDMI_P5V0, USB_POWER, VCCK, VDDIO_AO1V8, DDR_VDDC according to the schematics.

---
Changes from my previous attempt below
[1] https://lore.kernel.org/patchwork/patch/1031243/

New patch and fix the commit message.
Added regulator-always-on since this is core input regulator. Split the linking on regulator and usb node in separate patch.

Later more patchs will follow linking more core regulator as per shematics.

---
 arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts | 9 +++++++++
 1 file changed, 9 insertions(+)

index 9972b1515da6..41d5fa370eb3 100644
@@ -50,6 +50,15 @@
 		};
 	};
 
+	p5v0: regulator-p5v0 {
+		compatible = "regulator-fixed";
+
+		regulator-name = "P5V0";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+	};
+
 	tflash_vdd: regulator-tflash_vdd {
 		/*
 		 * signal name from schematics: TFLASH_VDD_EN

2.23.0

Add missing linking regulator node to usb bus for power usb devices.

---
Changes from previous patch
[1] https://lore.kernel.org/patchwork/patch/1031243/
split the changes and add the comments to power source

---
 arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts | 7 +++++++
 1 file changed, 7 insertions(+)

index 41d5fa370eb3..f3dcabf97c63 100644
@@ -36,8 +36,15 @@
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
 
+		/*
+		 * signal name from schematics: PWREN
+		 */
 		gpio = <&gpio_ao GPIOAO_5 GPIO_ACTIVE_HIGH>;
 		enable-active-high;
+		/*
+		 * signal name from sehematics: USB_POWER
+		 */
+		vin-supply = <&p5v0>;
 	};
 
 	leds {

2.23.0

usb_otg bus needs to get initialize from the u-boot to be configured to used as power source to SBC or usb otg port will get configured as host device. Right now this support is missing in the u-boot and phy driver so to avoid power failed warning, we would disable this feature until proper fix is found.

[    2.716048] phy phy-c0000000.phy.0: USB ID detect failed!
[    2.720186] phy phy-c0000000.phy.0: phy poweron failed --> -22
[    2.726001] ------------[ cut here ]------------
[    2.730583] WARNING: CPU: 0 PID: 12 at drivers/regulator/core.c:2039 _regulator_put+0x3c/0xe8
[    2.738983] Modules linked in:
[    2.742005] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.2.9-1-ARCH #1
[    2.748643] Hardware name: Hardkernel ODROID-C2 (DT)
[    2.753566] Workqueue: events deferred_probe_work_func
[    2.758649] pstate: 60000005 (nZCv daif -PAN -UAO)
[    2.763394] pc : _regulator_put+0x3c/0xe8
[    2.767361] lr : _regulator_put+0x3c/0xe8
[    2.771326] sp : ffff000011aa3a50
[    2.774604] x29: ffff000011aa3a50 x28: ffff80007ed1b600
[    2.779865] x27: ffff80007f7036a8 x26: ffff80007f7036a8
[    2.785126] x25: 0000000000000000 x24: ffff000011a44458
[    2.790387] x23: ffff000011344218 x22: 0000000000000009
[    2.795649] x21: ffff000011aa3b68 x20: ffff80007ed1b500
[    2.800910] x19: ffff80007ed1b500 x18: 0000000000000010
[    2.806171] x17: 000000005be5943c x16: 00000000f1c73b29
[    2.811432] x15: ffffffffffffffff x14: ffff0000117396c8
[    2.816694] x13: ffff000091aa37a7 x12: ffff000011aa37af
[    2.821955] x11: ffff000011763000 x10: ffff000011aa3730
[    2.827216] x9 : 00000000ffffffd0 x8 : ffff000010871760
[    2.832477] x7 : 00000000000000d0 x6 : ffff0000119d151b
[    2.837739] x5 : 000000000000000f x4 : 0000000000000000
[    2.843000] x3 : 0000000000000000 x2 : 38104b2678c20100
[    2.848261] x1 : 0000000000000000 x0 : 0000000000000024
[    2.853523] Call trace:
[    2.855940]  _regulator_put+0x3c/0xe8
[    2.859562]  regulator_put+0x34/0x48
[    2.863098]  regulator_bulk_free+0x40/0x58
[    2.867153]  devm_regulator_bulk_release+0x24/0x30
[    2.871896]  release_nodes+0x1f0/0x2e0
[    2.875604]  devres_release_all+0x64/0xa4
[    2.879571]  really_probe+0x1c8/0x3e0
[    2.883194]  driver_probe_device+0xe4/0x138
[    2.887334]  __device_attach_driver+0x90/0x110
[    2.891733]  bus_for_each_drv+0x8c/0xd8
[    2.895527]  __device_attach+0xdc/0x160
[    2.899322]  device_initial_probe+0x24/0x30
[    2.903463]  bus_probe_device+0x9c/0xa8
[    2.907258]  deferred_probe_work_func+0xa0/0xf0
[    2.911745]  process_one_work+0x1b4/0x408
[    2.915711]  worker_thread+0x54/0x4b8
[    2.919334]  kthread+0x12c/0x130
[    2.922526]  ret_from_fork+0x10/0x1c
[    2.926060] ---[ end trace 51a68f4c0035d6c0 ]---
[    2.930691] ------------[ cut here ]------------
[    2.935242] WARNING: CPU: 0 PID: 12 at drivers/regulator/core.c:2039 _regulator_put+0x3c/0xe8
[    2.943653] Modules linked in:
[    2.946675] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G        W         5.2.9-1-ARCH #1
[    2.954694] Hardware name: Hardkernel ODROID-C2 (DT)
[    2.959613] Workqueue: events deferred_probe_work_func
[    2.964700] pstate: 60000005 (nZCv daif -PAN -UAO)
[    2.969445] pc : _regulator_put+0x3c/0xe8
[    2.973412] lr : _regulator_put+0x3c/0xe8
[    2.977377] sp : ffff000011aa3a50
[    2.980655] x29: ffff000011aa3a50 x28: ffff80007ed1b600
[    2.985916] x27: ffff80007f7036a8 x26: ffff80007f7036a8
[    2.991177] x25: 0000000000000000 x24: ffff000011a44458
[    2.996439] x23: ffff000011344218 x22: 0000000000000009
[    3.001700] x21: ffff000011aa3b68 x20: ffff80007ed1bd00
[    3.006961] x19: ffff80007ed1bd00 x18: 0000000000000010
[    3.012222] x17: 000000005be5943c x16: 00000000f1c73b29
[    3.017484] x15: ffffffffffffffff x14: ffff0000117396c8
[    3.022745] x13: ffff000091aa37a7 x12: ffff000011aa37af
[    3.028006] x11: ffff000011763000 x10: ffff000011aa3730
[    3.033267] x9 : 00000000ffffffd0 x8 : ffff000010871760
[    3.038528] x7 : 00000000000000fd x6 : ffff0000119d151b
[    3.043790] x5 : 000000000000000f x4 : 0000000000000000
[    3.049051] x3 : 0000000000000000 x2 : 38104b2678c20100
[    3.054312] x1 : 0000000000000000 x0 : 0000000000000024
[    3.059574] Call trace:
[    3.061991]  _regulator_put+0x3c/0xe8
[    3.065613]  regulator_put+0x34/0x48
[    3.069149]  regulator_bulk_free+0x40/0x58
[    3.073203]  devm_regulator_bulk_release+0x24/0x30
[    3.077947]  release_nodes+0x1f0/0x2e0
[    3.081655]  devres_release_all+0x64/0xa4
[    3.085622]  really_probe+0x1c8/0x3e0
[    3.089245]  driver_probe_device+0xe4/0x138
[    3.093385]  __device_attach_driver+0x90/0x110
[    3.097784]  bus_for_each_drv+0x8c/0xd8
[    3.101578]  __device_attach+0xdc/0x160
[    3.105373]  device_initial_probe+0x24/0x30
[    3.109514]  bus_probe_device+0x9c/0xa8
[    3.113309]  deferred_probe_work_func+0xa0/0xf0
[    3.117796]  process_one_work+0x1b4/0x408
[    3.121762]  worker_thread+0x54/0x4b8
[    3.125384]  kthread+0x12c/0x130
[    3.128575]  ret_from_fork+0x10/0x1c
[    3.132110] ---[ end trace 51a68f4c0035d6c1 ]---
[    3.136753] dwc2: probe of c9000000.usb failed with error -22

---

[0] https://patchwork.kernel.org/patch/10757569/
Earlier my approach to initialize the usb0 bus was limited, some more phy tuning is required both at driver and u-boot to get this feature working. So for now just disable this.

---
 arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

index f3dcabf97c63..792698a60a12 100644
@@ -312,7 +312,7 @@
 };
 
 &usb0_phy {
-	status = "okay";
+	status = "disabled";
 	phy-supply = <&usb_otg_pwr>;
 };
 

@@ -322,7 +322,7 @@
 };
 
 &usb0 {
-	status = "okay";
+	status = "disabled";
 };
 
 &usb1 {

2.23.0

Hi Anand,

thank you for the patches

On Sat, Aug 24, 2019 at 8:49 PM Anand Moon <[email protected]> wrote:
[...]

this whole series is:

Hi Martin,

Thanks, I have some more patch in line for this board.

Best Regards
-Anand

great, any improvement counts (especially since most boards are derived from Amlogic reference designs, so it's likely that more than just the Odroid-C2 will benefit from your patches) :)