Re: [PATCH v2 11/26] ARM: sun5i: Add DRAM gates

[Chen-Yu Tsai <wens@csie.org>]

On Thu, Jan 14, 2016 at 11:24 PM, Maxime Ripard
<maxime.ripard@free-electrons.com> wrote:
> The DRAM gates control whether the image / display devices on the SoC have
> access to the DRAM clock or not.
>
> Enable it.
>
> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
> ---
>  arch/arm/boot/dts/sun5i-a10s.dtsi |  7 ++++---
>  arch/arm/boot/dts/sun5i-a13.dtsi  |  2 +-
>  arch/arm/boot/dts/sun5i-r8.dtsi   |  2 +-
>  arch/arm/boot/dts/sun5i.dtsi      | 19 +++++++++++++++++++
>  4 files changed, 25 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm/boot/dts/sun5i-a10s.dtsi b/arch/arm/boot/dts/sun5i-a10s.dtsi
> index bddd0de88af6..52d2c79cb37b 100644
> --- a/arch/arm/boot/dts/sun5i-a10s.dtsi
> +++ b/arch/arm/boot/dts/sun5i-a10s.dtsi
> @@ -66,7 +66,7 @@
>                                      "simple-framebuffer";
>                         allwinner,pipeline = "de_be0-lcd0-hdmi";
>                         clocks = <&pll5 1>, <&ahb_gates 36>, <&ahb_gates 43>,
> -                                <&ahb_gates 44>;
> +                                <&ahb_gates 44>, <&dram_gates 26>;
>                         status = "disabled";
>                 };
>
> @@ -74,7 +74,8 @@
>                         compatible = "allwinner,simple-framebuffer",
>                                      "simple-framebuffer";
>                         allwinner,pipeline = "de_be0-lcd0";
> -                       clocks = <&pll5 1>, <&ahb_gates 36>, <&ahb_gates 44>;
> +                       clocks = <&pll5 1>, <&ahb_gates 36>, <&ahb_gates 44>,
> +                                <&dram_gates 26>;
>                         status = "disabled";
>                 };
>
> @@ -83,7 +84,7 @@
>                                      "simple-framebuffer";
>                         allwinner,pipeline = "de_be0-lcd0-tve0";
>                         clocks = <&pll5 1>, <&ahb_gates 34>, <&ahb_gates 36>,
> -                                <&ahb_gates 44>;
> +                                <&ahb_gates 44>, <&dram_gates 26>;
>                         status = "disabled";
>                 };
>         };
> diff --git a/arch/arm/boot/dts/sun5i-a13.dtsi b/arch/arm/boot/dts/sun5i-a13.dtsi
> index 9669b03f20f3..f29163650ca8 100644
> --- a/arch/arm/boot/dts/sun5i-a13.dtsi
> +++ b/arch/arm/boot/dts/sun5i-a13.dtsi
> @@ -62,7 +62,7 @@
>                                      "simple-framebuffer";
>                         allwinner,pipeline = "de_be0-lcd0";
>                         clocks = <&ahb_gates 36>, <&ahb_gates 44>, <&de_be_clk>,
> -                                <&tcon_ch0_clk>;
> +                                <&tcon_ch0_clk>, <&dram_gates 26>;
>                         status = "disabled";
>                 };
>         };
> diff --git a/arch/arm/boot/dts/sun5i-r8.dtsi b/arch/arm/boot/dts/sun5i-r8.dtsi
> index b1e4e0170d51..691d3de75b35 100644
> --- a/arch/arm/boot/dts/sun5i-r8.dtsi
> +++ b/arch/arm/boot/dts/sun5i-r8.dtsi
> @@ -53,7 +53,7 @@
>                         allwinner,pipeline = "de_be0-lcd0-tve0";
>                         clocks = <&ahb_gates 34>, <&ahb_gates 36>,
>                                  <&ahb_gates 44>, <&de_be_clk>,
> -                                <&tcon_ch1_clk>;
> +                                <&tcon_ch1_clk>, <&dram_gates 26>;
>                         status = "disabled";
>                 };
>         };
> diff --git a/arch/arm/boot/dts/sun5i.dtsi b/arch/arm/boot/dts/sun5i.dtsi
> index 0840612b5ed6..c72d94228915 100644
> --- a/arch/arm/boot/dts/sun5i.dtsi
> +++ b/arch/arm/boot/dts/sun5i.dtsi
> @@ -338,6 +338,25 @@
>                         clock-output-names = "usb_ohci0", "usb_phy";
>                 };
>
> +               dram_gates: clk@01c20100 {
> +                       #clock-cells = <1>;
> +                       compatible = "allwinner,sun5i-a13-dram-gates-clk";
> +                       reg = <0x01c20100 0x4>;
> +                       clocks = <&pll5 0>;
> +                       clock-indices = <0>,
> +                                       <1>,

According to A10s manual, bit 3 is DRAM clock for TS (transport stream
decoder), while bit 5 is for the TV encoder.

The others look good.

ChenYu

> +                                       <25>,
> +                                       <26>,
> +                                       <29>,
> +                                       <31>;
> +                       clock-output-names = "dram_ve",
> +                                            "dram_csi",
> +                                            "dram_de_fe",
> +                                            "dram_de_be",
> +                                            "dram_ace",
> +                                            "dram_iep";
> +               };
> +
>                 codec_clk: clk@01c20140 {
>                         #clock-cells = <0>;
>                         compatible = "allwinner,sun4i-a10-codec-clk";
> --
> 2.6.4
>