lock/unlock nand

conf/machine/boards/elphel393/elphel393.dts

@@ -402,7 +402,7 @@
 			ps7_nand_0: ps7-nand@e1000000 {
 				compatible = "arm,pl353-nand-r2p1";
 				reg = < 0xe1000000 0x1000000 >;
-				arm,nand-clk-freq-hz = <0x5f5e100>;
+				/*arm,nand-clk-freq-hz = <0x5f5e100>;*/
 				arm,nand-width = <0x8>;
 				arm,nand-cycle-t0 = <0x4>;
                                 arm,nand-cycle-t1 = <0x4>;

recipes-kernel/linux/linux-xlnx/xilinx_nandps_elphel393.patch → recipes-kernel/linux/linux-xlnx/pl35x_nand.c.patch

 diff -Naur a/drivers/mtd/nand/pl35x_nand.c b/drivers/mtd/nand/pl35x_nand.c
---- a/drivers/mtd/nand/pl35x_nand.c	2016-01-25 18:34:24.065782741 -0700
-+++ b/drivers/mtd/nand/pl35x_nand.c	2016-01-25 18:55:51.945806920 -0700
+--- a/drivers/mtd/nand/pl35x_nand.c	2016-02-19 13:41:57.660680389 -0700
++++ b/drivers/mtd/nand/pl35x_nand.c	2016-02-24 19:58:58.208889453 -0700
 @@ -117,6 +117,9 @@
  	{NAND_CMD_PARAM, NAND_CMD_NONE, 1, NAND_CMD_NONE},
  	{NAND_CMD_GET_FEATURES, NAND_CMD_NONE, 1, NAND_CMD_NONE},
@@ -11,3 +11,15 @@ diff -Naur a/drivers/mtd/nand/pl35x_nand.c b/drivers/mtd/nand/pl35x_nand.c
  	{NAND_CMD_NONE, NAND_CMD_NONE, 0, 0},
  	/* Add all the flash commands supported by the flash device and Linux */
  	/*
+@@ -1082,6 +1085,11 @@
+ 		return -ENXIO;
+ 	}
+ 
++	//elphel393 modification for Micron NAND chips
++	//TODO: add Micron chip ID checking
++	mtd->_unlock = nand_unlock;
++	mtd->_lock = nand_lock;
++	
+ 	ppdata.of_node = pdev->dev.of_node;
+ 
+ 	mtd_device_parse_register(&xnand->mtd, NULL, &ppdata, NULL, 0);

recipes-kernel/linux/linux-xlnx_4.0.bbappend

 FILESEXTRAPATHS_append := "${THISDIR}/linux-xlnx:"
 FILESEXTRAPATHS_prepend := "${THISDIR}/config:"
 
-SRC_URI_append += " file://xilinx_nandps_elphel393.patch"
+SRC_URI_append += " file://pl35x_nand.c.patch"
 SRC_URI_append += " file://xilinx_emacps.c.patch"
 SRC_URI_append += " file://xilinx_uartps.c.patch"
 SRC_URI_append += " file://si5338_vsc330x.patch"