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用AM3352的板子，内核4.19，emmc1 不能使能8线
2 i! c3 f! K# L8 b( u我看了很多贴子的log似乎都用的4线 驱动omap_hsmmc.c
3 a2 A! ?* Y! {! U0 z&mmc2 {9 o) Z: r0 p2 M( V2 @, O5 I: y( T
vmmc-supply = <&vmmcsd_fixed>;5 q! m3 H% A8 r3 T3 }9 f
pinctrl-names = "default";0 A, `" `- i; X% z. u
pinctrl-0 = <&emmc_pins>;( X9 L7 R6 P, X$ s. u) S8 ], J
bus-width = <8>;& T1 e& F" {5 m5 @+ E
status = "okay";4 w3 G& X4 g) B1 K0 v
ti,non-removable;
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! t7 F6 @0 T! P! z% q- N5 h信息：# g$ }( [* N, j5 F }
root:~# cat /sys/kernel/debug/mmc1/ios$ H% k0 i- i0 v
clock: 52000000 Hz" a, @; ?0 V% _; c3 v# [
vdd: 20 (3.2 ~ 3.3 V), @9 O" r- u6 S; G# H
bus mode: 2 (push-pull)5 k* y4 a8 E( H) h
chip select: 0 (don't care)
6 K9 g4 [$ P9 T& epower mode: 2 (on)' ?+ J; P( }2 m0 j6 S9 A: A
bus width: 2 (4 bits)
3 W; A$ z* t& a& p, P5 t) n8 v: Etiming spec: 1 (mmc high-speed)
" d0 h" ~( ]3 l; X0 p% q1 \% {7 B: d1 o2 C5 ~9 U
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# I7 W" v- f$ D/ }' r" t9 W clog：
9 ]4 i1 n/ N9 U/ s: V[ 1.662924] omap_i2c 44e0b000.i2c: bus 0 rev0.11 at 100 kHz1 [2 o/ h: v7 P0 I
[ 1.672359] omap_hsmmc 481d8000.mmc: omap_hsmmc_set_bus_width ios->timing=1 ios->bus_width=0
3 D! S7 ?/ _4 {2 i( r P[ 1.680990] omap_hsmmc 481d8000.mmc: Set clock to 400000Hz
; F8 w( }1 l7 V% _2 S. P+ {[ 1.686838] omap_hsmmc 481d8000.mmc: omap_hsmmc_set_bus_width ios->timing=1 ios->bus_width=06 X# I: b6 i/ w+ ]$ r2 I
[ 1.695431] omap_hsmmc 481d8000.mmc: Set clock to 52000000Hz6 |& {3 m- O9 i; h
[ 1.701433] omap_hsmmc 481d8000.mmc: omap_hsmmc_set_bus_width ios->timing=1 ios->bus_width=3
: Z' ?" W: ]" O# D/ ` e[ 1.710020] omap_hsmmc 481d8000.mmc: Set clock to 52000000Hz
3 U" D+ P) _ F8 g) R[ 1.716069] mmc1: switch to bus width 8 faiLED* b' ?2 ]3 g$ C* _
[ 1.720589] omap_hsmmc 481d8000.mmc: omap_hsmmc_set_bus_width ios->timing=1 ios->bus_width=2+ v$ Z2 Y u3 k; J0 o* J& c2 {
[ 1.729175] omap_hsmmc 481d8000.mmc: Set clock to 52000000Hz+ E6 g- v. e' L8 F/ @- j, D& G, H2 h
[ 1.735710] mmc1: new high speed MMC card at address 0001- L5 k: i, _) j# j% W& G
[ 1.742154] mmcblk1: mmc1:0001 004G60 3.69 GiB $ [6 X0 o! b9 \
[ 1.747295] mmcblk1boot0: mmc1:0001 004G60 partition 1 2.00 MiB: { R' o. }* o: ~+ \
[ 1.753768] mmcblk1boot1: mmc1:0001 004G60 partition 2 2.00 MiB
5 L6 h. A3 g; j[ 1.759963] mmcblk1rpmb: mmc1:0001 004G60 partition 3 512 KiB, chardev (244:0)0 Q% f R4 p6 Y/ V* _7 v+ _$ T
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发表于 2020-11-17 15:03
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支持！
反对！