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 <kishon@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi
index 5a262e1a0313..38fb1828e26a 100644
--- a/arch/arm/boot/dts/dra7.dtsi
+++ b/arch/arm/boot/dts/dra7.dtsi
@@ -1045,6 +1045,7 @@
                         dma-names = "tx", "rx";
                         status = "disabled";
                         pbias-supply = <&pbias_mmc_reg>;
+                        max-frequency = <192000000>;
                 };
 
                 mmc2: mmc@480b4000 {
@@ -1056,6 +1057,7 @@
                         dmas = <&sdma_xbar 47>, <&sdma_xbar 48>;
                         dma-names = "tx", "rx";
                         status = "disabled";
+                        max-frequency = <192000000>;
                 };
 
                 mmc3: mmc@480ad000 {
@@ -1067,6 +1069,8 @@
                         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 {
@@ -1078,6 +1082,7 @@
                         dmas = <&sdma_xbar 57>, <&sdma_xbar 58>;
                         dma-names = "tx", "rx";
                         status = "disabled";
+                        max-frequency = <192000000>;
                 };
 
                 mmu0_dsp1: mmu@40d01000 {