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标题:
AM335X:mmc1: switch to bus width 8 failed
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作者:
Henriete11
时间:
2020-11-17 15:03
标题:
AM335X:mmc1: switch to bus width 8 failed
用AM3352的板子，内核4.19，emmc1 不能使能8线
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我看了很多贴子的log似乎都用的4线 驱动omap_hsmmc.c
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&mmc2 {
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vmmc-supply = <&vmmcsd_fixed>;
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pinctrl-names = "default";
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pinctrl-0 = <&emmc_pins>;
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bus-width = <8>;
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status = "okay";
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ti,non-removable;
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};
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信息：
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root:~# cat /sys/kernel/debug/mmc1/ios
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clock: 52000000 Hz
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vdd: 20 (3.2 ~ 3.3 V)
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bus mode: 2 (push-pull)
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chip select: 0 (don't care)
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power mode: 2 (on)
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bus width: 2 (4 bits)
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timing spec: 1 (mmc high-speed)
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log：
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[ 1.662924] omap_i2c 44e0b000.i2c: bus 0 rev0.11 at 100 kHz
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[ 1.672359] omap_hsmmc 481d8000.mmc: omap_hsmmc_set_bus_width ios->timing=1 ios->bus_width=0
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[ 1.680990] omap_hsmmc 481d8000.mmc: Set clock to 400000Hz
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[ 1.686838] omap_hsmmc 481d8000.mmc: omap_hsmmc_set_bus_width ios->timing=1 ios->bus_width=0
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[ 1.695431] omap_hsmmc 481d8000.mmc: Set clock to 52000000Hz
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[ 1.701433] omap_hsmmc 481d8000.mmc: omap_hsmmc_set_bus_width ios->timing=1 ios->bus_width=3
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[ 1.710020] omap_hsmmc 481d8000.mmc: Set clock to 52000000Hz
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[ 1.716069] mmc1: switch to bus width 8 faiLED
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[ 1.720589] omap_hsmmc 481d8000.mmc: omap_hsmmc_set_bus_width ios->timing=1 ios->bus_width=2
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[ 1.729175] omap_hsmmc 481d8000.mmc: Set clock to 52000000Hz
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[ 1.735710] mmc1: new high speed MMC card at address 0001
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[ 1.742154] mmcblk1: mmc1:0001 004G60 3.69 GiB
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[ 1.747295] mmcblk1boot0: mmc1:0001 004G60 partition 1 2.00 MiB
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[ 1.753768] mmcblk1boot1: mmc1:0001 004G60 partition 2 2.00 MiB
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[ 1.759963] mmcblk1rpmb: mmc1:0001 004G60 partition 3 512 KiB, chardev (244:0)
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作者:
CCxiaom
时间:
2020-11-17 16:43
啥情况啊
作者:
NNNei256
时间:
2020-11-17 16:43
发生了什么
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