于 2018年5月2日 GMT+08:00 下午7:50:19, Jagan Teki [off-list ref] 写到:

On Wed, May 2, 2018 at 5:04 PM, Icenowy Zheng [off-list ref] wrote:

quoted

于 2018年5月2日 GMT+08:00 下午7:32:50, Maxime Ripard

[off-list ref] 写到:

quoted

quoted

On Mon, Apr 30, 2018 at 05:10:39PM +0530, Jagan Teki wrote:

quoted

DE2 in A64 has clock control unit and behavior is
same like H3/H5, so reuse the same in A64.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
 arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi

b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi

quoted

index 1b2ef28c42bd..67b80bbe5bf5 100644

--- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi

@@ -43,9 +43,11 @@
  */

 #include <dt-bindings/clock/sun50i-a64-ccu.h>
+#include <dt-bindings/clock/sun8i-de2.h>
 #include <dt-bindings/clock/sun8i-r-ccu.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/reset/sun50i-a64-ccu.h>
+#include <dt-bindings/reset/sun8i-de2.h>

 / {
     interrupt-parent = <&gic>;

@@ -168,6 +170,19 @@
             #size-cells = <1>;
             ranges;

+            display_clocks: clock@1000000 {
+                    compatible = "allwinner,sun50i-a64-de2-clk",
+                                 "allwinner,sun50i-h5-de2-clk";

The A64 was released before the H5, so that should be the other way
around.

quoted

+                    reg = <0x01000000 0x100000>;
+                    clocks = <&ccu CLK_DE>,
+                             <&ccu CLK_BUS_DE>;
+                    clock-names = "mod",
+                                  "bus";
+                    resets = <&ccu RST_BUS_DE>;
+                    #clock-cells = <1>;
+                    #reset-cells = <1>;
+            };
+

So it turns out we don't need the SRAM to access the CCU driver?

As now U-Boot claims SRAM, people may forget thus :-(

I've sent few mails about how we represent de2 with sram_c [1] but
none response after. Can I get further inputs so-that we can include
sram_c in proper manner.

Please wait for the SRAMC driver sent by Chen-Yu (and commited
by me) and the DE2 bus driver pending for the SRAMC part.

[1] https://patchwork.kernel.org/patch/10289737/

Jagan.

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