diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arc/boot/dts/axs10x_mb.dtsi | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/arch/arc/boot/dts/axs10x_mb.dtsi b/arch/arc/boot/dts/axs10x_mb.dtsi index 255c712..5d06f1f 100644 --- a/arch/arc/boot/dts/axs10x_mb.dtsi +++ b/arch/arc/boot/dts/axs10x_mb.dtsi @@ -77,8 +77,26 @@ interrupts = < 8 >; }; + /* + * According to DW Mobile Storage databook it is required + * to use "Hold Register" if card is enumerated in SDR12 or + * SDR25 modes. + * + * Utilization of "Hold Register" is already implemented via + * dw_mci_pltfm_prepare_command() which in its turn gets + * used through dw_mci_drv_data->prepare_command call-back. + * This call-back is used in Altera Socfpga platform and so + * we may reuse it saying that we're compatible with their + * "altr,socfpga-dw-mshc". + * + * Most probably "Hold Register" utilization is platform- + * independent requirement which means that single unified + * "snps,dw-mshc" should be enough for all users of DW MMC once + * dw_mci_pltfm_prepare_command() is used in generic platform + * code. + */ mmc@0x15000 { - compatible = "snps,dw-mshc"; + compatible = "altr,socfpga-dw-mshc"; reg = < 0x15000 0x400 >; num-slots = < 1 >; fifo-depth = < 16 >; |