* [PATCH 10/11] arm64: dts: renesas: initial Eagle board device tree
@ 2017-09-12 20:37 Sergei Shtylyov
2017-09-12 21:19 ` Sergei Shtylyov
0 siblings, 1 reply; 6+ messages in thread
From: Sergei Shtylyov @ 2017-09-12 20:37 UTC (permalink / raw)
To: linux-arm-kernel
Add the initial device tree for the R8A77970 SoC based Eagle board.
The board has 1 debug serial port (SCIF0); include support for it,
so that the serial console can work.
Based on the original (and large) patch by Vladimir Barinov
<vladimir.barinov@cogentembedded.com>.
Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
---
arch/arm64/boot/dts/renesas/Makefile | 1
arch/arm64/boot/dts/renesas/r8a77970-eagle.dts | 45 +++++++++++++++++++++++++
2 files changed, 46 insertions(+)
Index: renesas/arch/arm64/boot/dts/renesas/Makefile
===================================================================
--- renesas.orig/arch/arm64/boot/dts/renesas/Makefile
+++ renesas/arch/arm64/boot/dts/renesas/Makefile
@@ -2,6 +2,7 @@ dtb-$(CONFIG_ARCH_R8A7795) += r8a7795-sa
dtb-$(CONFIG_ARCH_R8A7795) += r8a7795-salvator-xs.dtb
dtb-$(CONFIG_ARCH_R8A7795) += r8a7795-es1-salvator-x.dtb r8a7795-es1-h3ulcb.dtb
dtb-$(CONFIG_ARCH_R8A7796) += r8a7796-salvator-x.dtb r8a7796-m3ulcb.dtb
+dtb-$(CONFIG_ARCH_R8A77970) += r8a77970-eagle.dtb
dtb-$(CONFIG_ARCH_R8A77995) += r8a77995-draak.dtb
always := $(dtb-y)
Index: renesas/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
===================================================================
--- /dev/null
+++ renesas/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
@@ -0,0 +1,45 @@
+/*
+ * Device Tree Source for the Eagle board
+ *
+ * Copyright (C) 2016-2017 Renesas Electronics Corp.
+ * Copyright (C) 2017 Cogent Embedded, Inc.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+/dts-v1/;
+#include "r8a77970.dtsi"
+
+/ {
+ model = "Renesas Eagle board based on r8a77970";
+ compatible = "renesas,eagle", "renesas,r8a77970";
+
+ aliases {
+ serial0 = &scif0;
+ };
+
+ chosen {
+ bootargs = "ignore_loglevel";
+ stdout-path = "serial0:115200n8";
+ };
+
+ memory at 48000000 {
+ device_type = "memory";
+ /* first 128MB is reserved for secure area. */
+ reg = <0x0 0x48000000 0x0 0x38000000>;
+ };
+};
+
+&extal_clk {
+ clock-frequency = <16666666>;
+};
+
+&extalr_clk {
+ clock-frequency = <32768>;
+};
+
+&scif0 {
+ status = "okay";
+};
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH 10/11] arm64: dts: renesas: initial Eagle board device tree
2017-09-12 20:37 [PATCH 10/11] arm64: dts: renesas: initial Eagle board device tree Sergei Shtylyov
@ 2017-09-12 21:19 ` Sergei Shtylyov
2017-09-15 17:28 ` Sergei Shtylyov
0 siblings, 1 reply; 6+ messages in thread
From: Sergei Shtylyov @ 2017-09-12 21:19 UTC (permalink / raw)
To: linux-arm-kernel
On 09/12/2017 11:37 PM, Sergei Shtylyov wrote:
> Add the initial device tree for the R8A77970 SoC based Eagle board.
> The board has 1 debug serial port (SCIF0); include support for it,
> so that the serial console can work.
>
> Based on the original (and large) patch by Vladimir Barinov
> <vladimir.barinov@cogentembedded.com>.
>
> Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
>
[...]
> Index: renesas/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
> ===================================================================
> --- /dev/null
> +++ renesas/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
> @@ -0,0 +1,45 @@
[...]
> +&extal_clk {
> + clock-frequency = <16666666>;
> +};
> +
> +&extalr_clk {
> + clock-frequency = <32768>;
> +};
> +
Forgot to specify SCIF_CLK -- it's populated.
> +&scif0 {
> + status = "okay";
> +};
MBR, Sergei
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH 10/11] arm64: dts: renesas: initial Eagle board device tree
2017-09-12 21:19 ` Sergei Shtylyov
@ 2017-09-15 17:28 ` Sergei Shtylyov
2017-09-15 18:44 ` Geert Uytterhoeven
0 siblings, 1 reply; 6+ messages in thread
From: Sergei Shtylyov @ 2017-09-15 17:28 UTC (permalink / raw)
To: linux-arm-kernel
On 09/13/2017 12:19 AM, Sergei Shtylyov wrote:
>> Add the initial device tree for the R8A77970 SoC based Eagle board.
>> The board has 1 debug serial port (SCIF0); include support for it,
>> so that the serial console can work.
>>
>> Based on the original (and large) patch by Vladimir Barinov
>> <vladimir.barinov@cogentembedded.com>.
>>
>> Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
>> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
>>
> [...]
>> Index: renesas/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
>> ===================================================================
>> --- /dev/null
>> +++ renesas/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
>> @@ -0,0 +1,45 @@
> [...]
>> +&extal_clk {
>> + clock-frequency = <16666666>;
>> +};
>> +
>> +&extalr_clk {
>> + clock-frequency = <32768>;
>> +};
>> +
>
> Forgot to specify SCIF_CLK -- it's populated.
Unfortunately, the kernel hangs after ttySC0 is registered if I specify
this frequency...
MBR, Sergei
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH 10/11] arm64: dts: renesas: initial Eagle board device tree
2017-09-15 17:28 ` Sergei Shtylyov
@ 2017-09-15 18:44 ` Geert Uytterhoeven
2017-09-15 18:53 ` Sergei Shtylyov
0 siblings, 1 reply; 6+ messages in thread
From: Geert Uytterhoeven @ 2017-09-15 18:44 UTC (permalink / raw)
To: linux-arm-kernel
Hi Sergei,
On Fri, Sep 15, 2017 at 7:28 PM, Sergei Shtylyov
<sergei.shtylyov@cogentembedded.com> wrote:
> On 09/13/2017 12:19 AM, Sergei Shtylyov wrote:
>>> Add the initial device tree for the R8A77970 SoC based Eagle board.
>>> The board has 1 debug serial port (SCIF0); include support for it,
>>> so that the serial console can work.
>>>
>>> Based on the original (and large) patch by Vladimir Barinov
>>> <vladimir.barinov@cogentembedded.com>.
>>>
>>> Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
>>> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
>>>
>> [...]
>>>
>>> Index: renesas/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
>>> ===================================================================
>>> --- /dev/null
>>> +++ renesas/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
>>> @@ -0,0 +1,45 @@
>>
>> [...]
>>>
>>> +&extal_clk {
>>> + clock-frequency = <16666666>;
>>> +};
>>> +
>>> +&extalr_clk {
>>> + clock-frequency = <32768>;
>>> +};
>>> +
>>
>> Forgot to specify SCIF_CLK -- it's populated.
>
> Unfortunately, the kernel hangs after ttySC0 is registered if I specify
> this frequency...
Is the crystal populated?
When doing initial bringup of the remote Eagle I have access to, the SCIF
registers didn't indicate SCIF_CLK was being used from U-Boot, while it
is used on R-Car Gen2 boards that have it populated.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH 10/11] arm64: dts: renesas: initial Eagle board device tree
2017-09-15 18:44 ` Geert Uytterhoeven
@ 2017-09-15 18:53 ` Sergei Shtylyov
2017-09-15 19:00 ` Geert Uytterhoeven
0 siblings, 1 reply; 6+ messages in thread
From: Sergei Shtylyov @ 2017-09-15 18:53 UTC (permalink / raw)
To: linux-arm-kernel
On 09/15/2017 09:44 PM, Geert Uytterhoeven wrote:
>>>> Add the initial device tree for the R8A77970 SoC based Eagle board.
>>>> The board has 1 debug serial port (SCIF0); include support for it,
>>>> so that the serial console can work.
>>>>
>>>> Based on the original (and large) patch by Vladimir Barinov
>>>> <vladimir.barinov@cogentembedded.com>.
>>>>
>>>> Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
>>>> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
>>>>
>>> [...]
>>>>
>>>> Index: renesas/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
>>>> ===================================================================
>>>> --- /dev/null
>>>> +++ renesas/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
>>>> @@ -0,0 +1,45 @@
>>>
>>> [...]
>>>>
>>>> +&extal_clk {
>>>> + clock-frequency = <16666666>;
>>>> +};
>>>> +
>>>> +&extalr_clk {
>>>> + clock-frequency = <32768>;
>>>> +};
>>>> +
>>>
>>> Forgot to specify SCIF_CLK -- it's populated.
>>
>> Unfortunately, the kernel hangs after ttySC0 is registered if I specify
>> this frequency...
>
> Is the crystal populated?
It should be, with 14.7456MHz chrystal. But it's connected to SCIF_CLK_B
pin -- perhaps that's the problem...
> When doing initial bringup of the remote Eagle I have access to, the SCIF
> registers didn't indicate SCIF_CLK was being used from U-Boot, while it
> is used on R-Car Gen2 boards that have it populated.
Perhaps PFC is just not configured properly?
>
> Gr{oetje,eeting}s,
>
> Geert
MBR, Sergei
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH 10/11] arm64: dts: renesas: initial Eagle board device tree
2017-09-15 18:53 ` Sergei Shtylyov
@ 2017-09-15 19:00 ` Geert Uytterhoeven
0 siblings, 0 replies; 6+ messages in thread
From: Geert Uytterhoeven @ 2017-09-15 19:00 UTC (permalink / raw)
To: linux-arm-kernel
Hi Sergei,
On Fri, Sep 15, 2017 at 8:53 PM, Sergei Shtylyov
<sergei.shtylyov@cogentembedded.com> wrote:
> On 09/15/2017 09:44 PM, Geert Uytterhoeven wrote:
>>>> Forgot to specify SCIF_CLK -- it's populated.
>>>
>>> Unfortunately, the kernel hangs after ttySC0 is registered if I
>>> specify
>>> this frequency...
>>
>> Is the crystal populated?
>
> It should be, with 14.7456MHz chrystal. But it's connected to SCIF_CLK_B
> pin -- perhaps that's the problem...
>
>> When doing initial bringup of the remote Eagle I have access to, the SCIF
>> registers didn't indicate SCIF_CLK was being used from U-Boot, while it
>> is used on R-Car Gen2 boards that have it populated.
>
> Perhaps PFC is just not configured properly?
Plausible.
As there's no PFC driver yet (at least I haven't seen one ;-), you can try
configuring the PFC to use SCIF_CLK_B by writing to the registers
from the U-Boot prompt...
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
^ permalink raw reply [flat|nested] 6+ messages in thread
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2017-09-12 20:37 [PATCH 10/11] arm64: dts: renesas: initial Eagle board device tree Sergei Shtylyov
2017-09-12 21:19 ` Sergei Shtylyov
2017-09-15 17:28 ` Sergei Shtylyov
2017-09-15 18:44 ` Geert Uytterhoeven
2017-09-15 18:53 ` Sergei Shtylyov
2017-09-15 19:00 ` Geert Uytterhoeven
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