Re: [PATCH 7/8] arm64: dts: rockchip: Add SDMMC/SDIO controllers for RK3528

Yao Zi
2025-03-01T13:35:37Z

On Sat, Mar 01, 2025 at 01:47:47PM +0100, Jonas Karlman wrote:
> Hi,
>
> On 2025-03-01 11:47, Yao Zi wrote:
> > RK3528 features two SDIO controllers and one SD/MMC controller, describe
> > them in devicetree. Since their sample and drive clocks are located in
> > the VO and VPU GRFs, corresponding syscons are added to make these
> > clocks available.
> >
> > Signed-off-by: Yao Zi <ziyao@disroot.org>
> > ---
> > arch/arm64/boot/dts/rockchip/rk3528.dtsi | 62 ++++++++++++++++++++++++
> > 1 file changed, 62 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/rockchip/rk3528.dtsi b/arch/arm64/boot/dts/rockchip/rk3528.dtsi
> > index 5b334690356a..078c97fa1d9f 100644
> > --- a/arch/arm64/boot/dts/rockchip/rk3528.dtsi
> > +++ b/arch/arm64/boot/dts/rockchip/rk3528.dtsi
> > @@ -7,6 +7,7 @@
> > #include <dt-bindings/interrupt-controller/arm-gic.h>
> > #include <dt-bindings/interrupt-controller/irq.h>
> > #include <dt-bindings/clock/rockchip,rk3528-cru.h>
> > +#include <dt-bindings/reset/rockchip,rk3528-cru.h>
> >
> > / {
> > compatible = "rockchip,rk3528";
> > @@ -122,6 +123,16 @@ gic: interrupt-controller@fed01000 {
> > #interrupt-cells = <3>;
> > };
> >
> > + vpu_grf: syscon@ff340000 {
> > + compatible = "rockchip,rk3528-vpu-grf", "syscon";
>
> vpu_grf is also used for gmac1, so should possible be a "syscon",
> "simple-mfd", or have I misunderstood when to use simple-mfd ?

Just as Heiko explained, "simple-mfd" is only required when the child
nodes should be populated automatically. Here these two GRFs are only
referenced and have no child, thus "simple-mfd" compatible isn't useful.

> > + reg = <0x0 0xff340000 0x0 0x8000>;
> > + };
> > +
> > + vo_grf: syscon@ff360000 {
> > + compatible = "rockchip,rk3528-vo-grf", "syscon";
>
> similar here, vo_grf is also used for gmac0.
>
> > + reg = <0x0 0xff360000 0x0 0x10000>;
> > + };
> > +
> > cru: clock-controller@ff4a0000 {
> > compatible = "rockchip,rk3528-cru";
> > reg = <0x0 0xff4a0000 0x0 0x30000>;
> > @@ -251,5 +262,56 @@ uart7: serial@ffa28000 {
> > reg-shift = <2>;
> > status = "disabled";
> > };
> > +
> > + sdio0: mmc@ffc10000 {
> > + compatible = "rockchip,rk3528-dw-mshc",
> > + "rockchip,rk3288-dw-mshc";
> > + reg = <0x0 0xffc10000 0x0 0x4000>;
> > + clocks = <&cru HCLK_SDIO0>,
> > + <&cru CCLK_SRC_SDIO0>,
> > + <&cru SCLK_SDIO0_DRV>,
> > + <&cru SCLK_SDIO0_SAMPLE>;
> > + clock-names = "biu", "ciu", "ciu-drive", "ciu-sample";
> > + fifo-depth = <0x100>;
> > + interrupts = <GIC_SPI 137 IRQ_TYPE_LEVEL_HIGH>;
> > + max-frequency = <150000000>;
> > + resets = <&cru SRST_H_SDIO0>;
> > + reset-names = "reset";
> > + status = "disabled";
> > + };
> > +
> > + sdio1: mmc@ffc20000 {
> > + compatible = "rockchip,rk3528-dw-mshc",
> > + "rockchip,rk3288-dw-mshc";
> > + reg = <0x0 0xffc20000 0x0 0x4000>;
> > + clocks = <&cru HCLK_SDIO1>,
> > + <&cru CCLK_SRC_SDIO1>,
> > + <&cru SCLK_SDIO1_DRV>,
> > + <&cru SCLK_SDIO1_SAMPLE>;
> > + clock-names = "biu", "ciu", "ciu-drive", "ciu-sample";
> > + fifo-depth = <0x100>;
> > + interrupts = <GIC_SPI 138 IRQ_TYPE_LEVEL_HIGH>;
> > + max-frequency = <150000000>;
> > + resets = <&cru SRST_H_SDIO1>;
> > + reset-names = "reset";
> > + status = "disabled";
> > + };
> > +
> > + sdmmc: mmc@ffc30000 {
> > + compatible = "rockchip,rk3528-dw-mshc",
> > + "rockchip,rk3288-dw-mshc";
> > + reg = <0x0 0xffc30000 0x0 0x4000>;
> > + clocks = <&cru HCLK_SDMMC0>,
> > + <&cru CCLK_SRC_SDMMC0>,
> > + <&cru SCLK_SDMMC_DRV>,
> > + <&cru SCLK_SDMMC_SAMPLE>;
> > + clock-names = "biu", "ciu", "ciu-drive", "ciu-sample";
> > + fifo-depth = <0x100>;
> > + interrupts = <GIC_SPI 133 IRQ_TYPE_LEVEL_HIGH>;
> > + max-frequency = <150000000>;
> > + resets = <&cru SRST_H_SDMMC0>;
> > + reset-names = "reset";
>
> Suggest adding default pinctrl props here:
>
> pinctrl-names = "default";
> pinctrl-0 = <&sdmmc_bus4>, <&sdmmc_clk>, <&sdmmc_cmd>, <&sdmmc_det>;
>
> And possible also for sdio0 and sdio1.
>
> Regards,
> Jonas

It makes sense. As mentioned in the cover letter, I depended on the
bootloader to setup pinctrl, to minimize dependency of the series.

Will complete the pinctrl properties in next version.

> > + status = "disabled";
> > + };
> > };
> > };
>

Best regards,
Yao Zi