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用AM3352的板子,内核4.19,emmc1 不能使能8线
我看了很多贴子的log似乎都用的4线 驱动omap_hsmmc.c &mmc2 { vmmc-supply = <&vmmcsd_fixed>; pinctrl-names = "default"; pinctrl-0 = <&emmc_pins>; bus-width = <8>; status = "okay"; ti,non-removable; }; 信息: root:~# cat /sys/kernel/debug/mmc1/ios clock: 52000000 Hz vdd: 20 (3.2 ~ 3.3 V) bus mode: 2 (push-pull) chip select: 0 (don't care) power mode: 2 (on) bus width: 2 (4 bits) timing spec: 1 (mmc high-speed) log: [ 1.662924] omap_i2c 44e0b000.i2c: bus 0 rev0.11 at 100 kHz [ 1.672359] omap_hsmmc 481d8000.mmc: omap_hsmmc_set_bus_width ios->timing=1 ios->bus_width=0 [ 1.680990] omap_hsmmc 481d8000.mmc: Set clock to 400000Hz [ 1.686838] omap_hsmmc 481d8000.mmc: omap_hsmmc_set_bus_width ios->timing=1 ios->bus_width=0 [ 1.695431] omap_hsmmc 481d8000.mmc: Set clock to 52000000Hz [ 1.701433] omap_hsmmc 481d8000.mmc: omap_hsmmc_set_bus_width ios->timing=1 ios->bus_width=3 [ 1.710020] omap_hsmmc 481d8000.mmc: Set clock to 52000000Hz [ 1.716069] mmc1: switch to bus width 8 failed [ 1.720589] omap_hsmmc 481d8000.mmc: omap_hsmmc_set_bus_width ios->timing=1 ios->bus_width=2 [ 1.729175] omap_hsmmc 481d8000.mmc: Set clock to 52000000Hz [ 1.735710] mmc1: new high speed MMC card at address 0001 [ 1.742154] mmcblk1: mmc1:0001 004G60 3.69 GiB [ 1.747295] mmcblk1boot0: mmc1:0001 004G60 partition 1 2.00 MiB [ 1.753768] mmcblk1boot1: mmc1:0001 004G60 partition 2 2.00 MiB [ 1.759963] mmcblk1rpmb: mmc1:0001 004G60 partition 3 512 KiB, chardev (244:0) |
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