Tool/software:
Hello, Expert
Follow title description, this is a double check.
How to let AM62x sdhci0 (eMMC0) works on SDR mode only?
Because we want to "prevent" eMMC works in DDR mode even eMMC support DDR.
This is spec w/ AM62x
eMMC0 works w/ Legacy SDR, high speed SDR, and HS200
Base on SDK 10.00.07.04,
Linux DTS should be motify as below.
/home/gibbs/work/am62/ti-processor-sdk-linux-am62xx-evm-10.00.07.04/board-support/ti-linux-kernel-6.6.32+git-ti/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
sdhci0: mmc@fa10000 {
compatible = "ti,am62-sdhci";
reg = <0x00 0x0fa10000 0x00 0x1000>, <0x00 0x0fa18000 0x00 0x400>;
interrupts = <GIC_SPI 133 IRQ_TYPE_LEVEL_HIGH>;
power-domains = <&k3_pds 57 TI_SCI_PD_EXCLUSIVE>;
clocks = <&k3_clks 57 5>, <&k3_clks 57 6>;
clock-names = "clk_ahb", "clk_xin";
assigned-clocks = <&k3_clks 57 6>;
assigned-clock-parents = <&k3_clks 57 8>;
bus-width = <8>;
/* mmc-ddr-1_8v; */
mmc-hs200-1_8v;
ti,clkbuf-sel = <0x7>;
ti,otap-del-sel-legacy = <0x0>;
ti,otap-del-sel-mmc-hs = <0x0>;
/* ti,otap-del-sel-ddr52 = <0x5>; */
ti,otap-del-sel-hs200 = <0x5>;
ti,itap-del-sel-legacy = <0xa>;
ti,itap-del-sel-mmc-hs = <0x1>;
status = "disabled";
};
UBoot DTS should be motify as below.
ti-processor-sdk-linux-am62xx-evm-10.00.07.04/board-support/ti-u-boot-2024.04+git/arch/arm/dts/k3-am62-main.dtsi
sdhci0: mmc@fa10000 {
compatible = "ti,am62-sdhci";
reg = <0x00 0x0fa10000 0x00 0x1000>, <0x00 0x0fa18000 0x00 0x400>;
interrupts = <GIC_SPI 133 IRQ_TYPE_LEVEL_HIGH>;
power-domains = <&k3_pds 57 TI_SCI_PD_EXCLUSIVE>;
clocks = <&k3_clks 57 5>, <&k3_clks 57 6>;
clock-names = "clk_ahb", "clk_xin";
assigned-clocks = <&k3_clks 57 6>;
assigned-clock-parents = <&k3_clks 57 8>;
bus-width = <8>;
/* mmc-ddr-1_8v; */
mmc-hs200-1_8v;
ti,clkbuf-sel = <0x7>;
ti,otap-del-sel-legacy = <0x0>;
ti,otap-del-sel-mmc-hs = <0x0>;
/* ti,otap-del-sel-ddr52 = <0x5>; */
ti,otap-del-sel-hs200 = <0x5>;
ti,itap-del-sel-legacy = <0xa>;
ti,itap-del-sel-mmc-hs = <0x1>;
status = "disabled";
};
Could you help us double check it?
Do I miss any thing?
Thank You Very Much
Gibbs
