Tool/software:
Hi, TI expert!
I have a development environment for am6234, with our own evaluation board.
The software SDK version is PROCESSOR-SDK-LINUX-RT-AM62X-08.06.00.42.
The current mmc0 speed of our board is hs200, as shown below:
The corresponding device tree configuration is as follows：
sdhci0: mmc@fa10000 {
compatible = "ti,am62-sdhci";
reg = <0x00 0xfa10000 0x00 0x260>, <0x00 0xfa18000 0x00 0x134>;
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>;
mmc-ddr-1_8v;
mmc-hs200-1_8v;
ti,trm-icp = <0x2>;
bus-width = <8>;
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 = "okay";
};
&main_pmx0 {
main_mmc0_pins_default: main-mmc0-pins-default {
pinctrl-single,pins = <
AM62X_IOPAD(0x220, PIN_INPUT, 0) /* (Y3) MMC0_CMD */
AM62X_IOPAD(0x218, PIN_INPUT, 0) /* (AB1) MMC0_CLK */
AM62X_IOPAD(0x214, PIN_INPUT, 0) /* (AA2) MMC0_DAT0 */
AM62X_IOPAD(0x210, PIN_INPUT, 0) /* (AA1) MMC0_DAT1 */
AM62X_IOPAD(0x20c, PIN_INPUT, 0) /* (AA3) MMC0_DAT2 */
AM62X_IOPAD(0x208, PIN_INPUT, 0) /* (Y4) MMC0_DAT3 */
AM62X_IOPAD(0x204, PIN_INPUT, 0) /* (AB2) MMC0_DAT4 */
AM62X_IOPAD(0x200, PIN_INPUT, 0) /* (AC1) MMC0_DAT5 */
AM62X_IOPAD(0x1fc, PIN_INPUT, 0) /* (AD2) MMC0_DAT6 */
AM62X_IOPAD(0x1f8, PIN_INPUT, 0) /* (AC2) MMC0_DAT7 */
>;
};
};
&sdhci0 {
pinctrl-names = "default";
pinctrl-0 = <&main_mmc0_pins_default>;
ti,driver-strength-ohm = <50>;
non-removable;
disable-wp;
};
If I want to reduce the speed of mmc0, such as from hs200 to sdr104, how do I modify the device tree？
Regards,
Li
