summaryrefslogtreecommitdiff
path: root/arch/arc/boot
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arc/boot')
-rw-r--r--arch/arc/boot/dts/axs10x_mb.dtsi20
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 255c7121ea80..5d06f1fb4266 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 >;