ARM: dts: dra7: Add "max-frequency" property to MMC dt nodes

Add "max-frequency" property to MMC dt nodes and set the
maximum frequency to 192MHz for MMC1/MMC2, 64MHz for MMC3
and 192MHz for MMC4. pdata quirks must be utilized to
detect presence of rev 1.1/1.0 of silicon and adjust
maximum frequencies as per restrictions documented in i843.

Signed-off-by: Kishon Vijay Abraham I <[email protected]>
Signed-off-by: Sekhar Nori <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>

diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi
index 25908dd338ee258342a57299b9f1828d3d7b5a4f..abb1fa1acb427fbc305c02841287bfbd55bc116a 100644 (file)
--- a/arch/arm/boot/dts/dra7.dtsi
+++ b/arch/arm/boot/dts/dra7.dtsi
@@ -1037,6 +1037,7 @@
                        dma-names = "tx", "rx";
                        status = "disabled";
                        pbias-supply = <&pbias_mmc_reg>;
+                       max-frequency = <192000000>;
                };
 
                mmc2: mmc@480b4000 {
@@ -1048,6 +1049,7 @@
                        dmas = <&sdma_xbar 47>, <&sdma_xbar 48>;
                        dma-names = "tx", "rx";
                        status = "disabled";
+                       max-frequency = <192000000>;
                };
 
                mmc3: mmc@480ad000 {
@@ -1059,6 +1061,8 @@
                        dmas = <&sdma_xbar 77>, <&sdma_xbar 78>;
                        dma-names = "tx", "rx";
                        status = "disabled";
+                       /* Errata i887 limits max-frequency of MMC3 to 64 MHz */
+                       max-frequency = <64000000>;
                };
 
                mmc4: mmc@480d1000 {
@@ -1070,6 +1074,7 @@
                        dmas = <&sdma_xbar 57>, <&sdma_xbar 58>;
                        dma-names = "tx", "rx";
                        status = "disabled";
+                       max-frequency = <192000000>;
                };
 
                mmu0_dsp1: mmu@40d01000 {