Re: [PATCH v4 5/6] ARM: dts: sunxi: Add Allwinner H3 DTSI

From: Maxime Ripard
Date: Mon Nov 23 2015 - 03:57:28 EST

Hi,

On Sun, Nov 01, 2015 at 02:33:23PM +0100, Jens Kuske wrote:
> >> + bus_gates: clk@01c20060 {
> >> + #clock-cells = <1>;
> >> + compatible = "allwinner,sun8i-h3-bus-gates-clk";
> >> + reg = <0x01c20060 0x14>;
> >> + clocks = <&ahb1>, <&ahb2>, <&apb1>, <&apb2>;
> >> + clock-names = "ahb1", "ahb2", "apb1", "apb2";
> >> + clock-indices = <5>, <6>, <8>,
> >> + <9>, <10>, <13>,
> >> + <14>, <17>, <18>,
> >> + <19>, <20>,
> >> + <21>, <23>,
> >> + <24>, <25>,
> >> + <26>, <27>,
> >> + <28>, <29>,
> >> + <30>, <31>, <32>,
> >> + <35>, <36>, <37>,
> >> + <40>, <41>, <43>,
> >> + <44>, <52>, <53>,
> >> + <54>, <64>,
> >> + <65>, <69>, <72>,
> >> + <76>, <77>, <78>,
> >> + <96>, <97>, <98>,
> >> + <112>, <113>,
> >> + <114>, <115>, <116>,
> >> + <128>, <135>;
> >> + clock-output-names = "ahb1_ce", "ahb1_dma", "ahb1_mmc0",
> >> + "ahb1_mmc1", "ahb1_mmc2", "ahb1_nand",
> >> + "ahb1_sdram", "ahb2_gmac", "ahb1_ts",
> >> + "ahb1_hstimer", "ahb1_spi0",
> >> + "ahb1_spi1", "ahb1_otg",
> >> + "ahb1_otg_ehci0", "ahb1_ehic1",
> >
> > ahb1_ehci1? Same for the following 3 lines.
> I'll fix them...
> >
> >> + "ahb1_ehic2", "ahb1_ehic3",
> >> + "ahb1_otg_ohci0", "ahb2_ohic1",
> >> + "ahb2_ohic2", "ahb2_ohic3", "ahb1_ve",
> >> + "ahb1_lcd0", "ahb1_lcd1", "ahb1_deint",
> >> + "ahb1_csi", "ahb1_tve", "ahb1_hdmi",
> >> + "ahb1_de", "ahb1_gpu", "ahb1_msgbox",
> >> + "ahb1_spinlock", "apb1_codec",
> >> + "apb1_spdif", "apb1_pio", "apb1_ths",
> >> + "apb1_i2s0", "apb1_i2s1", "apb1_i2s2",
> >> + "apb2_i2c0", "apb2_i2c1", "apb2_i2c2",
> >> + "apb2_uart0", "apb2_uart1",
> >> + "apb2_uart2", "apb2_uart3", "apb2_scr",
> >> + "ahb1_ephy", "ahb1_dbg";
> >
> > If it weren't for the last 2 clocks, we could cleanly split out apb1 and apb2
> > gates. Having a separate AHB clock gate taking 2 addresses seems messy
> > as well. :(
>
> Well, maybe we still should do that, if we split the resets too at least
> apb[12] would line up again.
>
> I don't know what to do with these bus things any more, all variants I
> sent had issues somewhere...

AFAIK, Arnd had some objections, but he never got back to us when we
explained how the hardware was laid out, so I don't know if they still
apply.

> >> + };
> >> +
> >> + mmc0_clk: clk@01c20088 {
> >> + #clock-cells = <1>;
> >> + compatible = "allwinner,sun4i-a10-mmc-clk";
> >> + reg = <0x01c20088 0x4>;
> >> + clocks = <&osc24M>, <&pll6 0>, <&pll8 0>;
> >> + clock-output-names = "mmc0",
> >> + "mmc0_output",
> >> + "mmc0_sample";
> >> + };
> >> +
> >> + mmc1_clk: clk@01c2008c {
> >> + #clock-cells = <1>;
> >> + compatible = "allwinner,sun4i-a10-mmc-clk";
> >> + reg = <0x01c2008c 0x4>;
> >> + clocks = <&osc24M>, <&pll6 0>, <&pll8 0>;
> >> + clock-output-names = "mmc1",
> >> + "mmc1_output",
> >> + "mmc1_sample";
> >> + };
> >> +
> >> + mmc2_clk: clk@01c20090 {
> >> + #clock-cells = <1>;
> >> + compatible = "allwinner,sun4i-a10-mmc-clk";
> >> + reg = <0x01c20090 0x4>;
> >> + clocks = <&osc24M>, <&pll6 0>, <&pll8 0>;
> >> + clock-output-names = "mmc2",
> >> + "mmc2_output",
> >> + "mmc2_sample";
> >> + };
> >> +
> >> + mbus_clk: clk@01c2015c {
> >> + #clock-cells = <0>;
> >> + compatible = "allwinner,sun8i-a23-mbus-clk";
> >> + reg = <0x01c2015c 0x4>;
> >> + clocks = <&osc24M>, <&pll6 1>, <&pll5>;
> >> + clock-output-names = "mbus";
> >> + };
> >> + };
> >> +
> >> + soc {
> >> + compatible = "simple-bus";
> >> + #address-cells = <1>;
> >> + #size-cells = <1>;
> >> + ranges;
> >> +
> >> + dma: dma-controller@01c02000 {
> >> + compatible = "allwinner,sun8i-h3-dma";
> >> + reg = <0x01c02000 0x1000>;
> >> + interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
> >> + clocks = <&bus_gates 6>;
> >> + resets = <&bus_rst 6>;
> >> + #dma-cells = <1>;
> >> + };
> >> +
> >> + mmc0: mmc@01c0f000 {
> >> + compatible = "allwinner,sun5i-a13-mmc";
> >> + reg = <0x01c0f000 0x1000>;
> >> + clocks = <&bus_gates 8>,
> >> + <&mmc0_clk 0>,
> >> + <&mmc0_clk 1>,
> >> + <&mmc0_clk 2>;
> >> + clock-names = "ahb",
> >> + "mmc",
> >> + "output",
> >> + "sample";
> >> + resets = <&bus_rst 8>;
> >> + reset-names = "ahb";
> >> + interrupts = <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>;
> >> + status = "disabled";
> >> + #address-cells = <1>;
> >> + #size-cells = <0>;
> >> + };
> >> +
> >> + mmc1: mmc@01c10000 {
> >> + compatible = "allwinner,sun5i-a13-mmc";
> >> + reg = <0x01c10000 0x1000>;
> >> + clocks = <&bus_gates 9>,
> >> + <&mmc1_clk 0>,
> >> + <&mmc1_clk 1>,
> >> + <&mmc1_clk 2>;
> >> + clock-names = "ahb",
> >> + "mmc",
> >> + "output",
> >> + "sample";
> >> + resets = <&bus_rst 9>;
> >> + reset-names = "ahb";
> >> + interrupts = <GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>;
> >> + status = "disabled";
> >> + #address-cells = <1>;
> >> + #size-cells = <0>;
> >> + };
> >> +
> >> + mmc2: mmc@01c11000 {
> >> + compatible = "allwinner,sun5i-a13-mmc";
> >> + reg = <0x01c11000 0x1000>;
> >> + clocks = <&bus_gates 10>,
> >> + <&mmc2_clk 0>,
> >> + <&mmc2_clk 1>,
> >> + <&mmc2_clk 2>;
> >> + clock-names = "ahb",
> >> + "mmc",
> >> + "output",
> >> + "sample";
> >> + resets = <&bus_rst 10>;
> >> + reset-names = "ahb";
> >> + interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
> >> + status = "disabled";
> >> + #address-cells = <1>;
> >> + #size-cells = <0>;
> >> + };
> >> +
> >> + pio: pinctrl@01c20800 {
> >> + compatible = "allwinner,sun8i-h3-pinctrl";
> >> + reg = <0x01c20800 0x400>;
> >> + interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>,
> >> + <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>;
> >> + clocks = <&bus_gates 69>;
> >> + gpio-controller;
> >> + #gpio-cells = <3>;
> >> + interrupt-controller;
> >> + #interrupt-cells = <2>;
> >> +
> >> + uart0_pins_a: uart0@0 {
> >> + allwinner,pins = "PA4", "PA5";
> >> + allwinner,function = "uart0";
> >> + allwinner,drive = <SUN4I_PINCTRL_10_MA>;
> >> + allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> >> + };
> >> +
> >> + mmc0_pins_a: mmc0@0 {
> >> + allwinner,pins = "PF0", "PF1", "PF2", "PF3",
> >> + "PF4", "PF5";
> >> + allwinner,function = "mmc0";
> >> + allwinner,drive = <SUN4I_PINCTRL_30_MA>;
> >> + allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> >> + };
> >> +
> >> + mmc0_cd_pin: mmc0_cd_pin@0 {
> >> + allwinner,pins = "PF6";
> >> + allwinner,function = "gpio_in";
> >> + allwinner,drive = <SUN4I_PINCTRL_10_MA>;
> >> + allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
> >> + };
> >
> > This should be in the board DTS, unless this is the reference design,
> > in which case you should name the label like "mmc0_cd_pin_reference_design".
> >
>
> The datasheet mentions SDC0_DET function on PF6, so I thought this is
> sort of fixed to this pin now. All designs I've seen use this pin.

Why is it set as a gpio then if it is a separate function?

Thanks!
Maxime

--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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