Hi All,
My target board(ARMv8-A AArch32 processor), supports the "Synopsys DWC
MSHC controller." I am using the Linux 5.4 kernel and have enabled the
following configurations to support the "SDHCI platform driver for
Synopsys DWC MSHC":
CONFIG_MMC_SDHCI=y
CONFIG_MMC_SDHCI_PLTFM=y
CONFIG_MMC_SDHCI_OF_DWCMSHC=y
This setup works perfectly on Linux 5.4, successfully detecting all
microSD cards. However, when I use the same driver configuration with
Linux 6.11.0, I encounter the below mentioned error:
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
sdhci-pltfm: SDHCI platform and OF driver helper
mmc0: sdhci: Version: 0x00000005 | Present: 0x020f0000
mmc0: sdhci: Caps: 0x276e648a | Caps_1: 0x08008071
SMCCC: SOC_ID: ARCH_SOC_ID not implemented, skipping ....
mmc0: sdhci: Auto-CMD23 available
mmc0: SDHCI controller on 48102000.sdhci [48102000.sdhci] using ADMA
mmc0: Timeout waiting for hardware cmd interrupt.
mmc0: sdhci: ============ SDHCI REGISTER DUMP ===========
mmc0: sdhci: Sys addr: 0x00000000 | Version: 0x00000005
mmc0: sdhci: Blk size: 0x00000000 | Blk cnt: 0x00000000
mmc0: sdhci: Argument: 0x00000c00 | Trn mode: 0x00000000
mmc0: sdhci: Present: 0x020f0000 | Host ctl: 0x00000001
mmc0: sdhci: Power: 0x0000000f | Blk gap: 0x00000000
mmc0: sdhci: Wake-up: 0x00000000 | Clock: 0x0000fa07
mmc0: sdhci: Timeout: 0x00000000 | Int stat: 0x00000000
mmc0: sdhci: Int enab: 0x00ff1083 | Sig enab: 0x00ff1083
mmc0: sdhci: ACmd stat: 0x00000000 | Slot int: 0x00000000
mmc0: sdhci: Caps: 0x276e648a | Caps_1: 0x08008071
mmc0: sdhci: Cmd: 0x0000341a | Max curr: 0x00000000
mmc0: sdhci: Resp[0]: 0x00000000 | Resp[1]: 0x00000000
mmc0: sdhci: Resp[2]: 0x00000000 | Resp[3]: 0x00000000
mmc0: sdhci: Host ctl2: 0x00000000
mmc0: sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x00000000
mmc0: sdhci: ============================================
mmc0: Reset 0x2 never completed.
=====================================================
Please find mmc debug info and dts file changes for references:-
root@devkit-e7:~# cat /sys/kernel/debug/mmc0/ios
clock: 400000 Hz
actual clock: 400000 Hz
vdd: 21 (3.3 ~ 3.4 V)
bus mode: 2 (push-pull)
chip select: 1 (active high)
power mode: 2 (on)
bus width: 0 (1 bits)
timing spec: 0 (legacy)
signal voltage: 0 (3.30 V)
driver type: 0 (driver type B)
sdmmc: sdhci@48102000 {
compatible = "snps,dwcmshc-sdhci";
reg = <0x48102000 0x1000>;
interrupts = <GIC_SPI 27 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&syst_hclk>, <&syst_hclk>;
clock-names = "core", "bus";
bus-width = <4>;
max-frequency = <25000000>;
status = "okay";
};
Kindly request you to please let me know if I am missing anything.
Regards,
Pankaj Pandey
