arm64: dts: meson: disable pad bias for mmc pinmuxes

In some cases (such as a boot from SPI) the bootloader or the ROM code may
leave a bias pull-down on the mmc pins. If so the MMC will fail during the
initialisation.

Explicitly disabling the pinmux solves the problem.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-axg.dtsi

@@ -303,6 +303,7 @@
 							 "emmc_cmd",
 							 "emmc_ds";
 						function = "emmc";
+						bias-disable;
 					};
 				};
 
@@ -533,6 +534,7 @@
 							 "sdio_cmd",
 							 "sdio_clk";
 						function = "sdio";
+						bias-disable;
 					};
 				};
 

arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi

@@ -363,13 +363,15 @@
 				       "emmc_cmd",
 				       "emmc_clk";
 				function = "emmc";
+				bias-disable;
 			};
 		};
 
 		emmc_ds_pins: emmc-ds {
 			mux {
 				groups = "emmc_ds";
 				function = "emmc";
+				bias-disable;
 			};
 		};
 
@@ -416,6 +418,7 @@
 				       "sdcard_cmd",
 				       "sdcard_clk";
 				function = "sdcard";
+				bias-disable;
 			};
 		};
 
@@ -436,6 +439,7 @@
 				       "sdio_cmd",
 				       "sdio_clk";
 				function = "sdio";
+				bias-disable;
 			};
 		};
 

arch/arm64/boot/dts/amlogic/meson-gxl.dtsi

@@ -310,13 +310,15 @@
 				       "emmc_cmd",
 				       "emmc_clk";
 				function = "emmc";
+				bias-disable;
 			};
 		};
 
 		emmc_ds_pins: emmc-ds {
 			mux {
 				groups = "emmc_ds";
 				function = "emmc";
+				bias-disable;
 			};
 		};
 
@@ -363,6 +365,7 @@
 				       "sdcard_cmd",
 				       "sdcard_clk";
 				function = "sdcard";
+				bias-disable;
 			};
 		};
 
@@ -383,6 +386,7 @@
 				       "sdio_cmd",
 				       "sdio_clk";
 				function = "sdio";
+				bias-disable;
 			};
 		};