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Date: Fri, 20 Mar 2020 03:31:06 +0900
From: Katsuhiro Suzuki <katsuhiro@...suster.net>
To: Heiko Stübner <heiko@...ech.de>
Cc: linux-rockchip@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: rockchip: move uart2 pinctrl settings to each
dts for rk3288
Hello Heiko,
On 2020/03/20 1:17, Heiko Stübner wrote:
> Hi,
>
> Am Donnerstag, 19. März 2020, 16:58:00 CET schrieb Katsuhiro Suzuki:
>> On 2020/03/20 0:25, Heiko Stübner wrote:
>>> Am Donnerstag, 19. März 2020, 16:13:39 CET schrieb Katsuhiro Suzuki:
>>>> This patch removes conflicted pinctrl settings uart2 and pwm 2/3
>>>> from common rk3288.dtsi and moves exist uart2 pinctrl settings
>>>> into each rk3288*.dts files.
>>>>
>>>> - pwm2_pin : use GPIO7_C6
>>>> - pwm3_pin : use GPIO7_C7
>>>> - uart2_xfer: use GPIO7_C6, GPIO7_C7
>>>
>>> Board files only ever get to enable either pwm2/3 or uart2,
>>> not both at once - so I'm not sure where you see conflicts.
>>>
>>
>> At first, I think so too. But I've saw this message when booting.
>>
>> ----------
>> [ 2.435504] rockchip-pinctrl pinctrl: pin gpio7-22 already requested by ff680020.pwm; cannot claim for ff690000.serial
>> [ 2.447506] rockchip-pinctrl pinctrl: pin-238 (ff690000.serial) status -22
>> [ 2.455198] rockchip-pinctrl pinctrl: could not request pin 238 (gpio7-22) from group uart2-xfer on device rockchip-pinctrl
>> ----------
>>
>> And it seems that uart2(ttyS2) is not working correctly.
>>
>> ----------
>> # cat /dev/ttyS2
>> cat: /dev/ttyS2: Input/output error
>> ----------
>>
>> I'm using newest linux-next, make defconfig and CONFIG_MODULES = n setting
>> with TinkerBoard. Can I resolve this issue in other ways?
>
> On the tinker-board pwm2 is unused and has a status=disabled in the
> devicetree [at least when checking my current branches], so the kernel
> shouldn't even create a plaform-device for it.
>
> I.e. see [0] - the of_device_is_available() call should already drop the
> disabled devices, so there should not even exist a ff680020.pwm .
>
> So I guess the solution would be to find out why it creates ff680020.pwm
> in the first place and fix that.
Thank you for comment. Yes, I agree.
Root cause is a wrong setting in my TinkerBoard (maybe bootloader)
that is suggested by Robin in another mail.
Sorry for confusing, please drop my patch.
Best Regards,
Katsuhiro Suzuki
>
> Heiko
>
> [0] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/drivers/of/platform.c#n174
>
>
>
>>> And of course there are alternative pins to use, if you need uart2
>>> you need both pins in uart-pinmux and if you need either as pwm, then
>>> the board by design just can't use them as uart2.
>>>
>>> So pin setting should stay where they are, as there really is no conflict.
>>>
>>>
>>> Heiko
>>>
>>>
>>>
>>>> Currently uart2 rk3288 user is the following:
>>>>
>>>> - rk3288-evb.dtsi:&uart2 {
>>>> - rk3288-firefly-reload.dts:&uart2 {
>>>> - rk3288-firefly.dtsi:&uart2 {
>>>> - rk3288-miqi.dts:&uart2 {
>>>> - rk3288-phycore-rdk.dts:&uart2 {
>>>> - rk3288-popmetal.dts:&uart2 {
>>>> - rk3288-r89.dts:&uart2 {
>>>> - rk3288-rock2-square.dts:&uart2 {
>>>> - rk3288-tinker.dtsi:&uart2 {
>>>> - rk3288-veyron.dtsi:&uart2 {
>>>> - rk3288-vyasa.dts:&uart2 {
>>>>
>>>> And no one is using pwm2 nor pwm3.
>>>>
>>>> Signed-off-by: Katsuhiro Suzuki <katsuhiro@...suster.net>
>>>> ---
>>>> arch/arm/boot/dts/rk3288-evb.dtsi | 2 ++
>>>> arch/arm/boot/dts/rk3288-firefly-reload.dts | 2 ++
>>>> arch/arm/boot/dts/rk3288-firefly.dtsi | 2 ++
>>>> arch/arm/boot/dts/rk3288-miqi.dts | 2 ++
>>>> arch/arm/boot/dts/rk3288-phycore-rdk.dts | 2 ++
>>>> arch/arm/boot/dts/rk3288-popmetal.dts | 2 ++
>>>> arch/arm/boot/dts/rk3288-r89.dts | 2 ++
>>>> arch/arm/boot/dts/rk3288-rock2-square.dts | 2 ++
>>>> arch/arm/boot/dts/rk3288-tinker.dtsi | 2 ++
>>>> arch/arm/boot/dts/rk3288-veyron.dtsi | 2 ++
>>>> arch/arm/boot/dts/rk3288-vyasa.dts | 2 ++
>>>> arch/arm/boot/dts/rk3288.dtsi | 6 ------
>>>> 12 files changed, 22 insertions(+), 6 deletions(-)
>>>>
>>>> diff --git a/arch/arm/boot/dts/rk3288-evb.dtsi b/arch/arm/boot/dts/rk3288-evb.dtsi
>>>> index 018802df4c0e..74091f831ecf 100644
>>>> --- a/arch/arm/boot/dts/rk3288-evb.dtsi
>>>> +++ b/arch/arm/boot/dts/rk3288-evb.dtsi
>>>> @@ -285,6 +285,8 @@ &uart1 {
>>>> };
>>>>
>>>> &uart2 {
>>>> + pinctrl-names = "default";
>>>> + pinctrl-0 = <&uart2_xfer>;
>>>> status = "okay";
>>>> };
>>>>
>>>> diff --git a/arch/arm/boot/dts/rk3288-firefly-reload.dts b/arch/arm/boot/dts/rk3288-firefly-reload.dts
>>>> index 8c38bda21a7c..b0c976c8e35b 100644
>>>> --- a/arch/arm/boot/dts/rk3288-firefly-reload.dts
>>>> +++ b/arch/arm/boot/dts/rk3288-firefly-reload.dts
>>>> @@ -283,6 +283,8 @@ &uart1 {
>>>> };
>>>>
>>>> &uart2 {
>>>> + pinctrl-names = "default";
>>>> + pinctrl-0 = <&uart2_xfer>;
>>>> status = "okay";
>>>> };
>>>>
>>>> diff --git a/arch/arm/boot/dts/rk3288-firefly.dtsi b/arch/arm/boot/dts/rk3288-firefly.dtsi
>>>> index 5e0a19004e46..1632cc083c12 100644
>>>> --- a/arch/arm/boot/dts/rk3288-firefly.dtsi
>>>> +++ b/arch/arm/boot/dts/rk3288-firefly.dtsi
>>>> @@ -532,6 +532,8 @@ &uart1 {
>>>> };
>>>>
>>>> &uart2 {
>>>> + pinctrl-names = "default";
>>>> + pinctrl-0 = <&uart2_xfer>;
>>>> status = "okay";
>>>> };
>>>>
>>>> diff --git a/arch/arm/boot/dts/rk3288-miqi.dts b/arch/arm/boot/dts/rk3288-miqi.dts
>>>> index c41d012c8850..2c0ed37fde80 100644
>>>> --- a/arch/arm/boot/dts/rk3288-miqi.dts
>>>> +++ b/arch/arm/boot/dts/rk3288-miqi.dts
>>>> @@ -379,6 +379,8 @@ &tsadc {
>>>> };
>>>>
>>>> &uart2 {
>>>> + pinctrl-names = "default";
>>>> + pinctrl-0 = <&uart2_xfer>;
>>>> status = "okay";
>>>> };
>>>>
>>>> diff --git a/arch/arm/boot/dts/rk3288-phycore-rdk.dts b/arch/arm/boot/dts/rk3288-phycore-rdk.dts
>>>> index 1e33859de484..6532c1ac43cd 100644
>>>> --- a/arch/arm/boot/dts/rk3288-phycore-rdk.dts
>>>> +++ b/arch/arm/boot/dts/rk3288-phycore-rdk.dts
>>>> @@ -244,6 +244,8 @@ &uart0 {
>>>> };
>>>>
>>>> &uart2 {
>>>> + pinctrl-names = "default";
>>>> + pinctrl-0 = <&uart2_xfer>;
>>>> status = "okay";
>>>> };
>>>>
>>>> diff --git a/arch/arm/boot/dts/rk3288-popmetal.dts b/arch/arm/boot/dts/rk3288-popmetal.dts
>>>> index 6a51940398b5..f18306bd9e6e 100644
>>>> --- a/arch/arm/boot/dts/rk3288-popmetal.dts
>>>> +++ b/arch/arm/boot/dts/rk3288-popmetal.dts
>>>> @@ -481,6 +481,8 @@ &uart1 {
>>>> };
>>>>
>>>> &uart2 {
>>>> + pinctrl-names = "default";
>>>> + pinctrl-0 = <&uart2_xfer>;
>>>> status = "okay";
>>>> };
>>>>
>>>> diff --git a/arch/arm/boot/dts/rk3288-r89.dts b/arch/arm/boot/dts/rk3288-r89.dts
>>>> index a258c7ae5329..02d2f5cfe201 100644
>>>> --- a/arch/arm/boot/dts/rk3288-r89.dts
>>>> +++ b/arch/arm/boot/dts/rk3288-r89.dts
>>>> @@ -340,6 +340,8 @@ &uart1 {
>>>> };
>>>>
>>>> &uart2 {
>>>> + pinctrl-names = "default";
>>>> + pinctrl-0 = <&uart2_xfer>;
>>>> status = "okay";
>>>> };
>>>>
>>>> diff --git a/arch/arm/boot/dts/rk3288-rock2-square.dts b/arch/arm/boot/dts/rk3288-rock2-square.dts
>>>> index cdcdc921ee09..a44290e882be 100644
>>>> --- a/arch/arm/boot/dts/rk3288-rock2-square.dts
>>>> +++ b/arch/arm/boot/dts/rk3288-rock2-square.dts
>>>> @@ -264,6 +264,8 @@ &spdif {
>>>> };
>>>>
>>>> &uart2 {
>>>> + pinctrl-names = "default";
>>>> + pinctrl-0 = <&uart2_xfer>;
>>>> status = "okay";
>>>> };
>>>>
>>>> diff --git a/arch/arm/boot/dts/rk3288-tinker.dtsi b/arch/arm/boot/dts/rk3288-tinker.dtsi
>>>> index acfaa12ec239..0327119f71b4 100644
>>>> --- a/arch/arm/boot/dts/rk3288-tinker.dtsi
>>>> +++ b/arch/arm/boot/dts/rk3288-tinker.dtsi
>>>> @@ -500,6 +500,8 @@ &uart1 {
>>>> };
>>>>
>>>> &uart2 {
>>>> + pinctrl-names = "default";
>>>> + pinctrl-0 = <&uart2_xfer>;
>>>> status = "okay";
>>>> };
>>>>
>>>> diff --git a/arch/arm/boot/dts/rk3288-veyron.dtsi b/arch/arm/boot/dts/rk3288-veyron.dtsi
>>>> index 54a6838d73f5..baa44d00e49a 100644
>>>> --- a/arch/arm/boot/dts/rk3288-veyron.dtsi
>>>> +++ b/arch/arm/boot/dts/rk3288-veyron.dtsi
>>>> @@ -412,6 +412,8 @@ &uart1 {
>>>> };
>>>>
>>>> &uart2 {
>>>> + pinctrl-names = "default";
>>>> + pinctrl-0 = <&uart2_xfer>;
>>>> status = "okay";
>>>> };
>>>>
>>>> diff --git a/arch/arm/boot/dts/rk3288-vyasa.dts b/arch/arm/boot/dts/rk3288-vyasa.dts
>>>> index 385dd59393e1..aa50cdc7f839 100644
>>>> --- a/arch/arm/boot/dts/rk3288-vyasa.dts
>>>> +++ b/arch/arm/boot/dts/rk3288-vyasa.dts
>>>> @@ -398,6 +398,8 @@ &tsadc {
>>>> };
>>>>
>>>> &uart2 {
>>>> + pinctrl-names = "default";
>>>> + pinctrl-0 = <&uart2_xfer>;
>>>> status = "okay";
>>>> };
>>>>
>>>> diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi
>>>> index 0cd88774db95..4c1f8cabb5eb 100644
>>>> --- a/arch/arm/boot/dts/rk3288.dtsi
>>>> +++ b/arch/arm/boot/dts/rk3288.dtsi
>>>> @@ -450,8 +450,6 @@ uart2: serial@...90000 {
>>>> reg-io-width = <4>;
>>>> clocks = <&cru SCLK_UART2>, <&cru PCLK_UART2>;
>>>> clock-names = "baudclk", "apb_pclk";
>>>> - pinctrl-names = "default";
>>>> - pinctrl-0 = <&uart2_xfer>;
>>>> status = "disabled";
>>>> };
>>>>
>>>> @@ -706,8 +704,6 @@ pwm2: pwm@...80020 {
>>>> compatible = "rockchip,rk3288-pwm";
>>>> reg = <0x0 0xff680020 0x0 0x10>;
>>>> #pwm-cells = <3>;
>>>> - pinctrl-names = "default";
>>>> - pinctrl-0 = <&pwm2_pin>;
>>>> clocks = <&cru PCLK_RKPWM>;
>>>> clock-names = "pwm";
>>>> status = "disabled";
>>>> @@ -717,8 +713,6 @@ pwm3: pwm@...80030 {
>>>> compatible = "rockchip,rk3288-pwm";
>>>> reg = <0x0 0xff680030 0x0 0x10>;
>>>> #pwm-cells = <3>;
>>>> - pinctrl-names = "default";
>>>> - pinctrl-0 = <&pwm3_pin>;
>>>> clocks = <&cru PCLK_RKPWM>;
>>>> clock-names = "pwm";
>>>> status = "disabled";
>>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>
>
>
>
>
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