[PATCH 0/3] Add R8A7792/Wheat board support

[PATCH 0/3] Add R8A7792/Wheat board support

[Sergei Shtylyov]

Hello.

   Here's the set of 3 patches against Simon Horman's 'renesas.git' repo,
'renesas-devel-20160826-v4.8-rc3' tag. We add the device tree support for
the R8A7792-based Wheat board. I have only sparse board documentation
at this point, according to which this board somewhat differs from the other
R-Car evaluation boards in that it has debug serial port, debug Ethernet chip,
and a NOR flash on the separate debug board (connected to the main board
with a ribbon cable). I'm not sure how to approach this (DT overlay, perhaps?),
for now I'm just posting the debug UART/Ethernet support the same way it was
done for the Blanche board -- these components seem to be the same between 
these 2 boards...

[1/3] DT: arm: shmobile: document Wheat board
[2/3] ARM: dts: wheat: initial device tree
[3/3] ARM: dts: wheat: add Ethernet support

WBR, Sergei

[PATCH 1/3] DT: arm: shmobile: document Wheat board

[Sergei Shtylyov]

Document the Wheat device tree bindings, listing it as a supported board.

This allows to use checkpatch.pl to validate .dts files referring to the
Wheat board.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>

---
 Documentation/devicetree/bindings/arm/shmobile.txt |    2 ++
 1 file changed, 2 insertions(+)

Index: renesas/Documentation/devicetree/bindings/arm/shmobile.txt
===================================================================
--- renesas.orig/Documentation/devicetree/bindings/arm/shmobile.txt
+++ renesas/Documentation/devicetree/bindings/arm/shmobile.txt
@@ -69,3 +69,5 @@ Boards:
     compatible = "renesas,salvator-x", "renesas,r8a7796";
   - SILK (RTP0RC7794LCB00011S)
     compatible = "renesas,silk", "renesas,r8a7794"
+  - Wheat
+    compatible = "renesas,wheat", "renesas,r8a7792"

Re: [PATCH 1/3] DT: arm: shmobile: document Wheat board

[Geert Uytterhoeven]

On Fri, Aug 26, 2016 at 10:20 PM, Sergei Shtylyov
<sergei.shtylyov-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org> wrote:
> Document the Wheat device tree bindings, listing it as a supported board.
>
> This allows to use checkpatch.pl to validate .dts files referring to the
> Wheat board.
>
> Signed-off-by: Sergei Shtylyov <sergei.shtylyov-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org>

Acked-by: Geert Uytterhoeven <geert+renesas-gXvu3+zWzMSzQB+pC5nmwQ@public.gmane.org>

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert-Td1EMuHUCqxL1ZNQvxDV9g@public.gmane.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
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Re: [PATCH 1/3] DT: arm: shmobile: document Wheat board

[Rob Herring]

On Fri, Aug 26, 2016 at 11:20:05PM +0300, Sergei Shtylyov wrote:
> Document the Wheat device tree bindings, listing it as a supported board.
> 
> This allows to use checkpatch.pl to validate .dts files referring to the
> Wheat board.
> 
> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>

Acked-by: Rob Herring <robh@kernel.org>

[PATCH 2/3] ARM: dts: wheat: initial device tree

[Sergei Shtylyov]

Add the initial device tree for the R8A7792  SoC based Wheat board.
The Wheat board itself has  no serial ports  wired up, the USB serial chips
are situated on a separate  debug board and  one of them is connected to
SCFI0  -- include unconditional support for  it, so that the serial console
can work.

Based  on the original (and large) patch by Vladimir Barinov 
<vladimir.barinov-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org>.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org>

---
 arch/arm/boot/dts/Makefile          |    1 
 arch/arm/boot/dts/r8a7792-wheat.dts |   50 ++++++++++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)

Index: renesas/arch/arm/boot/dts/Makefile
===================================================================
--- renesas.orig/arch/arm/boot/dts/Makefile
+++ renesas/arch/arm/boot/dts/Makefile
@@ -659,6 +659,7 @@ dtb-$(CONFIG_ARCH_SHMOBILE_MULTI) += \
 	r8a7791-koelsch.dtb \
 	r8a7791-porter.dtb \
 	r8a7792-blanche.dtb \
+	r8a7792-wheat.dtb \
 	r8a7793-gose.dtb \
 	r8a7794-alt.dtb \
 	r8a7794-silk.dtb \
Index: renesas/arch/arm/boot/dts/r8a7792-wheat.dts
===================================================================
--- /dev/null
+++ renesas/arch/arm/boot/dts/r8a7792-wheat.dts
@@ -0,0 +1,50 @@
+/*
+ * Device Tree Source for the Wheat board
+ *
+ * Copyright (C) 2016 Renesas Electronics Corporation
+ * Copyright (C) 2016 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 "r8a7792.dtsi"
+
+/ {
+	model = "Wheat";
+	compatible = "renesas,wheat", "renesas,r8a7792";
+
+	aliases {
+		serial0 = &scif0;
+	};
+
+	chosen {
+		bootargs = "ignore_loglevel";
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory@40000000 {
+		device_type = "memory";
+		reg = <0 0x40000000 0 0x40000000>;
+	};
+};
+
+&extal_clk {
+	clock-frequency = <20000000>;
+};
+
+&pfc {
+	scif0_pins: scif0 {
+		groups = "scif0_data";
+		function = "scif0";
+	};
+};
+
+&scif0 {
+	pinctrl-0 = <&scif0_pins>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};

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Re: [PATCH 2/3] ARM: dts: wheat: initial device tree

[Geert Uytterhoeven]

On Fri, Aug 26, 2016 at 10:21 PM, Sergei Shtylyov
<sergei.shtylyov@cogentembedded.com> wrote:
> Add the initial device tree for the R8A7792  SoC based Wheat board.
> The Wheat board itself has  no serial ports  wired up, the USB serial chips
> are situated on a separate  debug board and  one of them is connected to
> SCFI0  -- include unconditional 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: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
(limited to review that can be done without board documentation)

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@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

[PATCH 3/3] ARM: dts: wheat: add Ethernet support

[Sergei Shtylyov]

R8A7792  SoC  doesn't have the  EtherMAC core, so SMSC LAN89218 Ethernet
chip was used instead on the Wheat debug board; this chip is compatible
with SMSC LAN9115 for which  there's a (device  tree aware)  driver.
Describe the chip  in the Wheat device tree unconditionally (the driver
should fail the probe if the debug board isn't connected); enable DHCP and
NFS root in the command line for the kernel boot...

Based  on the original (and large) patch by Vladimir Barinov 
<vladimir.barinov-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org>.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov-M4DtvfQ/ZS1MRgGoP+s0PdBPR1lH4CV8@public.gmane.org>

---
 arch/arm/boot/dts/r8a7792-wheat.dts |   38 +++++++++++++++++++++++++++++++++++-
 1 file changed, 37 insertions(+), 1 deletion(-)

Index: renesas/arch/arm/boot/dts/r8a7792-wheat.dts
===================================================================
--- renesas.orig/arch/arm/boot/dts/r8a7792-wheat.dts
+++ renesas/arch/arm/boot/dts/r8a7792-wheat.dts
@@ -21,7 +21,7 @@
 	};
 
 	chosen {
-		bootargs = "ignore_loglevel";
+		bootargs = "ignore_loglevel rw root=/dev/nfs ip=dhcp";
 		stdout-path = "serial0:115200n8";
 	};
 
@@ -29,6 +29,31 @@
 		device_type = "memory";
 		reg = <0 0x40000000 0 0x40000000>;
 	};
+
+	d3_3v: regulator-3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "D3.3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	ethernet@18000000 {
+		compatible = "smsc,lan89218", "smsc,lan9115";
+		reg = <0 0x18000000 0 0x100>;
+		phy-mode = "mii";
+		interrupt-parent = <&irqc>;
+		interrupts = <0 IRQ_TYPE_EDGE_FALLING>;
+		smsc,irq-push-pull;
+		smsc,save-mac-address;
+		reg-io-width = <4>;
+		vddvario-supply = <&d3_3v>;
+		vdd33a-supply = <&d3_3v>;
+
+		pinctrl-0 = <&lan89218_pins>;
+		pinctrl-names = "default";
+	};
 };
 
 &extal_clk {
@@ -40,6 +65,17 @@
 		groups = "scif0_data";
 		function = "scif0";
 	};
+
+	lan89218_pins: lan89218 {
+		intc {
+			groups = "intc_irq0";
+			function = "intc";
+		};
+		lbsc {
+			groups = "lbsc_ex_cs0";
+			function = "lbsc";
+		};
+	};
 };
 
 &scif0 {

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Re: [PATCH 3/3] ARM: dts: wheat: add Ethernet support

[Geert Uytterhoeven]

On Fri, Aug 26, 2016 at 10:23 PM, Sergei Shtylyov
<sergei.shtylyov@cogentembedded.com> wrote:
> R8A7792  SoC  doesn't have the  EtherMAC core, so SMSC LAN89218 Ethernet
> chip was used instead on the Wheat debug board; this chip is compatible
> with SMSC LAN9115 for which  there's a (device  tree aware)  driver.
> Describe the chip  in the Wheat device tree unconditionally (the driver
> should fail the probe if the debug board isn't connected); enable DHCP and
> NFS root in the command line for the kernel boot...
>
> Based  on the original (and large) patch by Vladimir Barinov
> <vladimir.barinov@cogentembedded.com>.
>
> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
(limited to review that can be done without board documentation)

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@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

Re: [PATCH 0/3] Add R8A7792/Wheat board support

[Simon Horman]

On Fri, Aug 26, 2016 at 11:16:49PM +0300, Sergei Shtylyov wrote:
> Hello.
> 
>    Here's the set of 3 patches against Simon Horman's 'renesas.git' repo,
> 'renesas-devel-20160826-v4.8-rc3' tag. We add the device tree support for
> the R8A7792-based Wheat board. I have only sparse board documentation
> at this point, according to which this board somewhat differs from the other
> R-Car evaluation boards in that it has debug serial port, debug Ethernet chip,
> and a NOR flash on the separate debug board (connected to the main board
> with a ribbon cable). I'm not sure how to approach this (DT overlay, perhaps?),
> for now I'm just posting the debug UART/Ethernet support the same way it was
> done for the Blanche board -- these components seem to be the same between 
> these 2 boards...
> 
> [1/3] DT: arm: shmobile: document Wheat board
> [2/3] ARM: dts: wheat: initial device tree
> [3/3] ARM: dts: wheat: add Ethernet support

Thanks, I have queued this up.