Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/mips/rb532/Makefile b/arch/mips/rb532/Makefile
index 8186afc..fb4b4bf 100644
--- a/arch/mips/rb532/Makefile
+++ b/arch/mips/rb532/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the RB532 board specific parts of the kernel
 #
diff --git a/arch/mips/rb532/devices.c b/arch/mips/rb532/devices.c
index 354d258..c9ecf17 100644
--- a/arch/mips/rb532/devices.c
+++ b/arch/mips/rb532/devices.c
@@ -1,18 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  RouterBoard 500 Platform devices
  *
  *  Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
  *  Copyright (C) 2007 Florian Fainelli <florian@openwrt.org>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- *  GNU General Public License for more details.
  */
 #include <linux/kernel.h>
 #include <linux/export.h>
@@ -20,10 +11,10 @@
 #include <linux/ctype.h>
 #include <linux/string.h>
 #include <linux/platform_device.h>
-#include <linux/mtd/rawnand.h>
+#include <linux/mtd/platnand.h>
 #include <linux/mtd/mtd.h>
-#include <linux/mtd/partitions.h>
 #include <linux/gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/gpio_keys.h>
 #include <linux/input.h>
 #include <linux/serial_8250.h>
@@ -128,27 +119,30 @@
 	}
 };
 
-static struct cf_device cf_slot0_data = {
-	.gpio_pin = CF_GPIO_NUM
+static struct gpiod_lookup_table cf_slot0_gpio_table = {
+	.dev_id = "pata-rb532-cf",
+	.table = {
+		GPIO_LOOKUP("gpio0", CF_GPIO_NUM,
+			    NULL, GPIO_ACTIVE_HIGH),
+		{ },
+	},
 };
 
 static struct platform_device cf_slot0 = {
 	.id = -1,
 	.name = "pata-rb532-cf",
-	.dev.platform_data = &cf_slot0_data,
 	.resource = cf_slot0_res,
 	.num_resources = ARRAY_SIZE(cf_slot0_res),
 };
 
 /* Resources and device for NAND */
-static int rb532_dev_ready(struct mtd_info *mtd)
+static int rb532_dev_ready(struct nand_chip *chip)
 {
 	return gpio_get_value(GPIO_RDY);
 }
 
-static void rb532_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
+static void rb532_cmd_ctrl(struct nand_chip *chip, int cmd, unsigned int ctrl)
 {
-	struct nand_chip *chip = mtd_to_nand(mtd);
 	unsigned char orbits, nandbits;
 
 	if (ctrl & NAND_CTRL_CHANGE) {
@@ -161,7 +155,7 @@
 		set_latch_u5(orbits, nandbits);
 	}
 	if (cmd != NAND_CMD_NONE)
-		writeb(cmd, chip->IO_ADDR_W);
+		writeb(cmd, chip->legacy.IO_ADDR_W);
 }
 
 static struct resource nand_slot0_res[] = {
@@ -307,6 +301,7 @@
 
 	dev_set_drvdata(&korina_dev0.dev, &korina_dev0_data);
 
+	gpiod_add_lookup_table(&cf_slot0_gpio_table);
 	return platform_add_devices(rb532_devs, ARRAY_SIZE(rb532_devs));
 }
 
diff --git a/arch/mips/rb532/prom.c b/arch/mips/rb532/prom.c
index 6484e4a..26e957b 100644
--- a/arch/mips/rb532/prom.c
+++ b/arch/mips/rb532/prom.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  RouterBoard 500 specific prom routines
  *
@@ -6,22 +7,6 @@
  *  Copyright (C) 2007, Gabor Juhos <juhosg@openwrt.org>
  *			Felix Fietkau <nbd@openwrt.org>
  *			Florian Fainelli <florian@openwrt.org>
- *
- *  This program is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU General Public License
- *  as published by the Free Software Foundation; either version 2
- *  of the License, or (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the
- *  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- *  Boston, MA  02110-1301, USA.
- *
  */
 
 #include <linux/init.h>
@@ -29,7 +14,7 @@
 #include <linux/export.h>
 #include <linux/string.h>
 #include <linux/console.h>
-#include <linux/bootmem.h>
+#include <linux/memblock.h>
 #include <linux/ioport.h>
 #include <linux/blkdev.h>
 
diff --git a/arch/mips/rb532/time.c b/arch/mips/rb532/time.c
index 1377d59..68713dd 100644
--- a/arch/mips/rb532/time.c
+++ b/arch/mips/rb532/time.c
@@ -1,20 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Carsten Langgaard, carstenl@mips.com
  * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
  *
- *  This program is free software; you can distribute it and/or modify it
- *  under the terms of the GNU General Public License (Version 2) as
- *  published by the Free Software Foundation.
- *
- *  This program is distributed in the hope it will be useful, but WITHOUT
- *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- *  for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
  *  Setting up the clock on the MIPS boards.
  */