AM335X:mmc1: switch to bus width 8 failed

Henriete11

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
0 r1 a8 C5 s4 L! b7 y. B&mmc2 {
# }# T7 Q3 s' a, u& }        vmmc-supply = <&vmmcsd_fixed>;
- P1 `* y7 n$ I9 d$ a3 [# I# P        pinctrl-names = "default";
        pinctrl-0 = <&emmc_pins>;
* y5 l5 ~: A9 v5 \/ p- ?        bus-width = <8>;
' \* x3 z: p% M2 }8 Q7 A& l        status = "okay";
        ti,non-removable;
. S1 N" l+ o$ h$ ?; Z" ^( s};
1 e- G# b: y0 V, ]6 S2 z: J. O. o

# ?" J. Q* F, D信息：
root:~# cat /sys/kernel/debug/mmc1/ios
clock:          52000000 Hz
( V' V: K$ X4 O7 i9 N3 Q2 Pvdd:            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)
% M6 ]& J' _2 B6 c" M7 C8 N


1 m+ w  T* T/ }2 U) e# Q) ]0 dlog：
[    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
" e' R* R" p7 d4 l/ I: s[    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
% s' D' A) ?$ p) t[    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 _9 o; {* P: }& g5 j0 y8 b[    1.729175] omap_hsmmc 481d8000.mmc: Set clock to 52000000Hz
[    1.735710] mmc1: new high speed MMC card at address 0001
/ b$ v2 s& O( ]% P[    1.742154] mmcblk1: mmc1:0001 004G60 3.69 GiB
/ d# u; I: S; ]: q[    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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CCxiaom

啥情况啊

NNNei256

发生了什么