[PATCH 0/2] Add R8A7792 DU support

Hello.

   Here's the set of 2 patches against Simon Horman's 'renesas.git' repo,
'renesas-devel-20160725-v4.7-rc7' tag. We're adding the R8A7792 DU clocks and
device nodes. They have been tested on the Blanche board -- I'm not posting the
Blanche patch only because it also has some strange interaction with the
Ethernet chip, so that NFS root can't work anymore...

[1/2] ARM: dts: r8a7792: add DU clocks
[2/2] ARM: dts: r8a7792: add DU support

WBR, Sergei

Describe the DU0/1 clocks and their parent, ZX clock in the R8A7792 device
tree.

Signed-off-by: Sergei Shtylyov <redacted>

---
 arch/arm/boot/dts/r8a7792.dtsi |   13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

Index: renesas/arch/arm/boot/dts/r8a7792.dtsi
===================================================================

--- renesas.orig/arch/arm/boot/dts/r8a7792.dtsi
+++ renesas/arch/arm/boot/dts/r8a7792.dtsi

@@ -660,6 +660,13 @@
 			clock-div = <2>;
 			clock-mult = <1>;
 		};
+		zx_clk: zx {
+			compatible = "fixed-factor-clock";
+			clocks = <&cpg_clocks R8A7792_CLK_PLL1>;
+			#clock-cells = <0>;
+			clock-div = <3>;
+			clock-mult = <1>;
+		};
 		zs_clk: zs {
 			compatible = "fixed-factor-clock";
 			clocks = <&cpg_clocks R8A7792_CLK_PLL1>;

@@ -761,15 +768,17 @@
 				     "renesas,cpg-mstp-clocks";
 			reg = <0 0xe615014c 0 4>, <0 0xe61501c4 0 4>;
 			clocks = <&zs_clk>, <&zs_clk>, <&p_clk>, <&p_clk>,
-				 <&p_clk>, <&p_clk>;
+				 <&p_clk>, <&p_clk>, <&zx_clk>, <&zx_clk>;
 			#clock-cells = <1>;
 			clock-indices = <
 				R8A7792_CLK_HSCIF1 R8A7792_CLK_HSCIF0
 				R8A7792_CLK_SCIF3 R8A7792_CLK_SCIF2
 				R8A7792_CLK_SCIF1 R8A7792_CLK_SCIF0
+				R8A7792_CLK_DU1 R8A7792_CLK_DU0
 			>;
 			clock-output-names = "hscif1", "hscif0", "scif3",
-					     "scif2", "scif1", "scif0";
+					     "scif2", "scif1", "scif0",
+					     "du1", "du0";
 		};
 		mstp8_clks: mstp8_clks at e6150990 {
 			compatible = "renesas,r8a7792-mstp-clocks",

Define the generic R8A7792 part of the DU device node.

Signed-off-by: Sergei Shtylyov <redacted>

---
 arch/arm/boot/dts/r8a7792.dtsi |   28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

Index: renesas/arch/arm/boot/dts/r8a7792.dtsi
===================================================================

--- renesas.orig/arch/arm/boot/dts/r8a7792.dtsi
+++ renesas/arch/arm/boot/dts/r8a7792.dtsi

@@ -556,6 +556,34 @@
 			status = "disabled";
 		};
 
+		du: display at feb00000 {
+			compatible = "renesas,du-r8a7792";
+			reg = <0 0xfeb00000 0 0x40000>;
+			reg-names = "du";
+			interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&mstp7_clks R8A7792_CLK_DU0>,
+				 <&mstp7_clks R8A7792_CLK_DU1>;
+			clock-names = "du.0", "du.1";
+			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port at 0 {
+					reg = <0>;
+					du_out_rgb0: endpoint {
+					};
+				};
+				port at 1 {
+					reg = <1>;
+					du_out_rgb1: endpoint {
+					};
+				};
+			};
+		};
+
 		can0: can at e6e80000 {
 			compatible = "renesas,can-r8a7792",
 				     "renesas,rcar-gen2-can";

On 08/05/2016 09:24 PM, Sergei Shtylyov wrote:

   Here's the set of 2 patches against Simon Horman's 'renesas.git' repo,
'renesas-devel-20160725-v4.7-rc7' tag. We're adding the R8A7792 DU clocks and
device nodes. They have been tested on the Blanche board -- I'm not posting the
Blanche patch only because it also has some strange interaction with the
Ethernet chip, so that NFS root can't work anymore...

    Forgot to mention that the patch #2 depends on the R8A7792 DU driver patch 
posted last night.

MBR, Sergei

On Fri, Aug 5, 2016 at 8:26 PM, Sergei Shtylyov
[off-list ref] wrote:

Define the generic R8A7792 part of the DU device node.

Signed-off-by: Sergei Shtylyov <redacted>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

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

On Fri, Aug 05, 2016 at 09:28:59PM +0300, Sergei Shtylyov wrote:

On 08/05/2016 09:24 PM, Sergei Shtylyov wrote:

quoted

  Here's the set of 2 patches against Simon Horman's 'renesas.git' repo,
'renesas-devel-20160725-v4.7-rc7' tag. We're adding the R8A7792 DU clocks and
device nodes. They have been tested on the Blanche board -- I'm not posting the
Blanche patch only because it also has some strange interaction with the
Ethernet chip, so that NFS root can't work anymore...

   Forgot to mention that the patch #2 depends on the R8A7792 DU driver
patch posted last night.

Thanks.

The driver changes look line an incremental update to what is already done
for other R-Car Gen2 SoCs. And I am assuming that applying these patches
without the driver change is harmless - the driver just won't be
initialised until both the driver and DTS changes are present.

With the above reasoning I have queued up these patches with Geert's
reviewed-by tag. Please let me know if that is not desirable for some
reason.

Hello.

On 08/05/2016 09:24 PM, Sergei Shtylyov wrote:

   Here's the set of 2 patches against Simon Horman's 'renesas.git' repo,
'renesas-devel-20160725-v4.7-rc7' tag. We're adding the R8A7792 DU clocks and
device nodes. They have been tested on the Blanche board -- I'm not posting the
Blanche patch only because it also has some strange interaction with the
Ethernet chip, so that NFS root can't work anymore...

    Looks like this effect is confined to only one Blanche board, so I'm going 
to start posting the pending patches.

[1/2] ARM: dts: r8a7792: add DU clocks
[2/2] ARM: dts: r8a7792: add DU support

WBR, Sergei