Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm

Pull more ARM updates from Russell King:
 "Some further changes for this merge window:
   - fix bug building with gcc 4.6.4 and EABI.
   - fix pgtbl macro with some LPAE configurations
   - fix initrd override - FDT was overriding the command line, and it
     should be the other way around.
   - fix byteswap of instructions in undefined instruction handler
   - add basic support for SolidRun Hummingboard and Cubox-i boards"

* 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: fix building with gcc 4.6.4
  ARM: 7941/2: Fix incorrect FDT initrd parameter override
  ARM: 7947/1: Make pgtbl macro more robust
  ARM: 7946/1: asm: __und_usr_thumb need byteswap instructions in BE case
  ARM: 7930/1: Introduce atomic MMIO modify
  ARM: imx: initial SolidRun Cubox-i support
  ARM: imx: initial SolidRun HummingBoard support

arch/arm/Makefile

@@ -96,7 +96,7 @@ tune-$(CONFIG_CPU_V6K)		=$(call cc-option,-mtune=arm1136j-s,-mtune=strongarm)
 tune-y := $(tune-y)
 
 ifeq ($(CONFIG_AEABI),y)
-CFLAGS_ABI	:=-mabi=aapcs-linux -mno-thumb-interwork
+CFLAGS_ABI	:=-mabi=aapcs-linux -mno-thumb-interwork -mfpu=vfp
 else
 CFLAGS_ABI	:=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,)
 endif

arch/arm/boot/dts/Makefile

@@ -152,10 +152,13 @@ dtb-$(CONFIG_ARCH_MXC) += \
 	imx53-mba53.dtb \
 	imx53-qsb.dtb \
 	imx53-smd.dtb \
+	imx6dl-cubox-i.dtb \
+	imx6dl-hummingboard.dtb \
 	imx6dl-sabreauto.dtb \
 	imx6dl-sabresd.dtb \
 	imx6dl-wandboard.dtb \
 	imx6q-arm2.dtb \
+	imx6q-cubox-i.dtb \
 	imx6q-phytec-pbab01.dtb \
 	imx6q-sabreauto.dtb \
 	imx6q-sabrelite.dtb \

arch/arm/boot/dts/imx6dl-cubox-i.dts

@@ -0,0 +1,12 @@
+/*
+ * Copyright (C) 2014 Russell King
+ */
+/dts-v1/;
+
+#include "imx6dl.dtsi"
+#include "imx6qdl-cubox-i.dtsi"
+
+/ {
+	model = "SolidRun Cubox-i Solo/DualLite";
+	compatible = "solidrun,cubox-i/dl", "fsl,imx6dl";
+};

arch/arm/boot/dts/imx6dl-hummingboard.dts

@@ -0,0 +1,167 @@
+/*
+ * Copyright (C) 2013,2014 Russell King
+ */
+/dts-v1/;
+
+#include "imx6dl.dtsi"
+#include "imx6qdl-microsom.dtsi"
+#include "imx6qdl-microsom-ar8035.dtsi"
+
+/ {
+	model = "SolidRun HummingBoard DL/Solo";
+	compatible = "solidrun,hummingboard", "fsl,imx6dl";
+
+	ir_recv: ir-receiver {
+		compatible = "gpio-ir-receiver";
+		gpios = <&gpio1 2 1>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_hummingboard_gpio1_2>;
+	};
+
+	regulators {
+		compatible = "simple-bus";
+
+		reg_3p3v: 3p3v {
+			compatible = "regulator-fixed";
+			regulator-name = "3P3V";
+			regulator-min-microvolt = <3300000>;
+			regulator-max-microvolt = <3300000>;
+			regulator-always-on;
+		};
+
+		reg_usbh1_vbus: usb-h1-vbus {
+			compatible = "regulator-fixed";
+			enable-active-high;
+			gpio = <&gpio1 0 0>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_hummingboard_usbh1_vbus>;
+			regulator-name = "usb_h1_vbus";
+			regulator-min-microvolt = <5000000>;
+			regulator-max-microvolt = <5000000>;
+		};
+
+		reg_usbotg_vbus: usb-otg-vbus {
+			compatible = "regulator-fixed";
+			enable-active-high;
+			gpio = <&gpio3 22 0>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_hummingboard_usbotg_vbus>;
+			regulator-name = "usb_otg_vbus";
+			regulator-min-microvolt = <5000000>;
+			regulator-max-microvolt = <5000000>;
+		};
+	};
+
+	codec: spdif-transmitter {
+		compatible = "linux,spdif-dit";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_hummingboard_spdif>;
+	};
+
+	sound-spdif {
+		compatible = "fsl,imx-audio-spdif";
+		model = "imx-spdif";
+		/* IMX6 doesn't implement this yet */
+		spdif-controller = <&spdif>;
+		spdif-out;
+	};
+};
+
+&can1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_hummingboard_flexcan1>;
+	status = "okay";
+};
+
+&i2c1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_hummingboard_i2c1>;
+
+	/*
+	 * Not fitted on Carrier-1 board... yet
+	status = "okay";
+
+	rtc: pcf8523@68 {
+		compatible = "nxp,pcf8523";
+		reg = <0x68>;
+	};
+	 */
+};
+
+&iomuxc {
+	hummingboard {
+		pinctrl_hummingboard_flexcan1: hummingboard-flexcan1 {
+			fsl,pins = <
+				MX6QDL_PAD_SD3_CLK__FLEXCAN1_RX 0x80000000
+				MX6QDL_PAD_SD3_CMD__FLEXCAN1_TX 0x80000000
+			>;
+		};
+
+		pinctrl_hummingboard_gpio1_2: hummingboard-gpio1_2 {
+			fsl,pins = <
+				MX6QDL_PAD_GPIO_2__GPIO1_IO02 0x80000000
+			>;
+		};
+
+		pinctrl_hummingboard_i2c1: hummingboard-i2c1 {
+			fsl,pins = <
+				MX6QDL_PAD_EIM_D21__I2C1_SCL 0x4001b8b1
+				MX6QDL_PAD_EIM_D28__I2C1_SDA 0x4001b8b1
+			>;
+		};
+
+		pinctrl_hummingboard_spdif: hummingboard-spdif {
+			fsl,pins = <MX6QDL_PAD_GPIO_17__SPDIF_OUT 0x1b0b0>;
+		};
+
+		pinctrl_hummingboard_usbh1_vbus: hummingboard-usbh1-vbus {
+			fsl,pins = <MX6QDL_PAD_GPIO_0__GPIO1_IO00 0x1b0b0>;
+		};
+
+		pinctrl_hummingboard_usbotg_vbus: hummingboard-usbotg-vbus {
+			fsl,pins = <MX6QDL_PAD_EIM_D22__GPIO3_IO22 0x1b0b0>;
+		};
+
+		pinctrl_hummingboard_usdhc2_aux: hummingboard-usdhc2-aux {
+			fsl,pins = <
+				MX6QDL_PAD_GPIO_4__GPIO1_IO04    0x1f071
+			>;
+		};
+
+		pinctrl_hummingboard_usdhc2: hummingboard-usdhc2 {
+			fsl,pins = <
+				MX6QDL_PAD_SD2_CMD__SD2_CMD    0x17059
+				MX6QDL_PAD_SD2_CLK__SD2_CLK    0x10059
+				MX6QDL_PAD_SD2_DAT0__SD2_DATA0 0x17059
+				MX6QDL_PAD_SD2_DAT1__SD2_DATA1 0x17059
+				MX6QDL_PAD_SD2_DAT2__SD2_DATA2 0x17059
+				MX6QDL_PAD_SD2_DAT3__SD2_DATA3 0x13059
+			>;
+		};
+	};
+};
+
+&spdif {
+	status = "okay";
+};
+
+&usbh1 {
+	vbus-supply = <&reg_usbh1_vbus>;
+	status = "okay";
+};
+
+&usbotg {
+	vbus-supply = <&reg_usbotg_vbus>;
+	status = "okay";
+};
+
+&usdhc2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <
+		&pinctrl_hummingboard_usdhc2_aux
+		&pinctrl_hummingboard_usdhc2
+	>;
+	vmmc-supply = <&reg_3p3v>;
+	cd-gpios = <&gpio1 4 0>;
+	status = "okay";
+};

arch/arm/boot/dts/imx6q-cubox-i.dts

@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2014 Russell King
+ */
+/dts-v1/;
+
+#include "imx6q.dtsi"
+#include "imx6qdl-cubox-i.dtsi"
+
+/ {
+	model = "SolidRun Cubox-i Dual/Quad";
+	compatible = "solidrun,cubox-i/q", "fsl,imx6q";
+};
+
+&sata {
+	status = "okay";
+};

arch/arm/boot/dts/imx6qdl-cubox-i.dtsi

@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2014 Russell King
+ */
+#include "imx6qdl-microsom.dtsi"
+#include "imx6qdl-microsom-ar8035.dtsi"
+
+/ {
+	ir_recv: ir-receiver {
+		compatible = "gpio-ir-receiver";
+		gpios = <&gpio3 9 1>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_cubox_i_ir>;
+	};
+
+	regulators {
+		compatible = "simple-bus";
+
+		reg_3p3v: 3p3v {
+			compatible = "regulator-fixed";
+			regulator-name = "3P3V";
+			regulator-min-microvolt = <3300000>;
+			regulator-max-microvolt = <3300000>;
+			regulator-always-on;
+		};
+
+		reg_usbh1_vbus: usb-h1-vbus {
+			compatible = "regulator-fixed";
+			enable-active-high;
+			gpio = <&gpio1 0 0>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_cubox_i_usbh1_vbus>;
+			regulator-name = "usb_h1_vbus";
+			regulator-min-microvolt = <5000000>;
+			regulator-max-microvolt = <5000000>;
+		};
+
+		reg_usbotg_vbus: usb-otg-vbus {
+			compatible = "regulator-fixed";
+			enable-active-high;
+			gpio = <&gpio3 22 0>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_cubox_i_usbotg_vbus>;
+			regulator-name = "usb_otg_vbus";
+			regulator-min-microvolt = <5000000>;
+			regulator-max-microvolt = <5000000>;
+		};
+	};
+
+	codec: spdif-transmitter {
+		compatible = "linux,spdif-dit";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_cubox_i_spdif>;
+	};
+
+	sound-spdif {
+		compatible = "fsl,imx-audio-spdif";
+		model = "imx-spdif";
+		/* IMX6 doesn't implement this yet */
+		spdif-controller = <&spdif>;
+		spdif-out;
+	};
+};
+
+&i2c3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_cubox_i_i2c3>;
+
+	status = "okay";
+
+	rtc: pcf8523@68 {
+		compatible = "nxp,pcf8523";
+		reg = <0x68>;
+	};
+};
+
+&iomuxc {
+	cubox_i {
+		pinctrl_cubox_i_i2c3: cubox-i-i2c3 {
+			fsl,pins = <
+				MX6QDL_PAD_EIM_D17__I2C3_SCL 0x4001b8b1
+				MX6QDL_PAD_EIM_D18__I2C3_SDA 0x4001b8b1
+			>;
+		};
+
+		pinctrl_cubox_i_ir: cubox-i-ir {
+			fsl,pins = <
+				MX6QDL_PAD_EIM_DA9__GPIO3_IO09 0x80000000
+			>;
+		};
+
+		pinctrl_cubox_i_spdif: cubox-i-spdif {
+			fsl,pins = <MX6QDL_PAD_GPIO_17__SPDIF_OUT 0x1b0b0>;
+		};
+
+		pinctrl_cubox_i_usbh1_vbus: cubox-i-usbh1-vbus {
+			fsl,pins = <MX6QDL_PAD_GPIO_0__GPIO1_IO00 0x4001b0b0>;
+		};
+
+		pinctrl_cubox_i_usbotg_vbus: cubox-i-usbotg-vbus {
+			fsl,pins = <MX6QDL_PAD_EIM_D22__GPIO3_IO22 0x4001b0b0>;
+		};
+
+		pinctrl_cubox_i_usdhc2_aux: cubox-i-usdhc2-aux {
+			fsl,pins = <
+				MX6QDL_PAD_GPIO_4__GPIO1_IO04    0x1f071
+				MX6QDL_PAD_KEY_ROW1__SD2_VSELECT 0x1b071
+			>;
+		};
+
+		pinctrl_cubox_i_usdhc2: cubox-i-usdhc2 {
+			fsl,pins = <
+				MX6QDL_PAD_SD2_CMD__SD2_CMD    0x17059
+				MX6QDL_PAD_SD2_CLK__SD2_CLK    0x10059
+				MX6QDL_PAD_SD2_DAT0__SD2_DATA0 0x17059
+				MX6QDL_PAD_SD2_DAT1__SD2_DATA1 0x17059
+				MX6QDL_PAD_SD2_DAT2__SD2_DATA2 0x17059
+				MX6QDL_PAD_SD2_DAT3__SD2_DATA3 0x13059
+			>;
+		};
+	};
+};
+
+&spdif {
+	status = "okay";
+};
+
+&usbh1 {
+	vbus-supply = <&reg_usbh1_vbus>;
+	status = "okay";
+};
+
+&usbotg {
+	vbus-supply = <&reg_usbotg_vbus>;
+	status = "okay";
+};
+
+&usdhc2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_cubox_i_usdhc2_aux &pinctrl_cubox_i_usdhc2>;
+	vmmc-supply = <&reg_3p3v>;
+	cd-gpios = <&gpio1 4 0>;
+	status = "okay";
+};

arch/arm/boot/dts/imx6qdl-microsom-ar8035.dtsi

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2013,2014 Russell King
+ *
+ * This describes the hookup for an AR8035 to the iMX6 on the SolidRun
+ * MicroSOM.
+ */
+&fec {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_microsom_enet_ar8035>;
+	phy-mode = "rgmii";
+	phy-reset-duration = <2>;
+	phy-reset-gpios = <&gpio4 15 0>;
+	status = "okay";
+};
+
+&iomuxc {
+	enet {
+		pinctrl_microsom_enet_ar8035: microsom-enet-ar8035 {
+			fsl,pins = <
+				MX6QDL_PAD_ENET_MDIO__ENET_MDIO		0x1b0b0
+				MX6QDL_PAD_ENET_MDC__ENET_MDC		0x1b0b0
+				/* AR8035 reset */
+				MX6QDL_PAD_KEY_ROW4__GPIO4_IO15		0x130b0
+				/* AR8035 interrupt */
+				MX6QDL_PAD_DI0_PIN2__GPIO4_IO18		0x80000000
+				/* GPIO16 -> AR8035 25MHz */
+				MX6QDL_PAD_GPIO_16__ENET_REF_CLK	0xc0000000
+				MX6QDL_PAD_RGMII_TXC__RGMII_TXC		0x80000000
+				MX6QDL_PAD_RGMII_TD0__RGMII_TD0		0x1b0b0
+				MX6QDL_PAD_RGMII_TD1__RGMII_TD1		0x1b0b0
+				MX6QDL_PAD_RGMII_TD2__RGMII_TD2		0x1b0b0
+				MX6QDL_PAD_RGMII_TD3__RGMII_TD3		0x1b0b0
+				MX6QDL_PAD_RGMII_TX_CTL__RGMII_TX_CTL	0x1b0b0
+				/* AR8035 CLK_25M --> ENET_REF_CLK (V22) */
+				MX6QDL_PAD_ENET_REF_CLK__ENET_TX_CLK	0x0a0b1
+				/* AR8035 pin strapping: IO voltage: pull up */
+				MX6QDL_PAD_RGMII_RXC__RGMII_RXC		0x1b0b0
+				/* AR8035 pin strapping: PHYADDR#0: pull down */
+				MX6QDL_PAD_RGMII_RD0__RGMII_RD0		0x130b0
+				/* AR8035 pin strapping: PHYADDR#1: pull down */
+				MX6QDL_PAD_RGMII_RD1__RGMII_RD1		0x130b0
+				/* AR8035 pin strapping: MODE#1: pull up */
+				MX6QDL_PAD_RGMII_RD2__RGMII_RD2		0x1b0b0
+				/* AR8035 pin strapping: MODE#3: pull up */
+				MX6QDL_PAD_RGMII_RD3__RGMII_RD3		0x1b0b0
+				/* AR8035 pin strapping: MODE#0: pull down */
+				MX6QDL_PAD_RGMII_RX_CTL__RGMII_RX_CTL	0x130b0
+
+				/*
+				 * As the RMII pins are also connected to RGMII
+				 * so that an AR8030 can be placed, set these
+				 * to high-z with the same pulls as above.
+				 * Use the GPIO settings to avoid changing the
+				 * input select registers.
+				 */
+				MX6QDL_PAD_ENET_CRS_DV__GPIO1_IO25	0x03000
+				MX6QDL_PAD_ENET_RXD0__GPIO1_IO27	0x03000
+				MX6QDL_PAD_ENET_RXD1__GPIO1_IO26	0x03000
+			>;
+		};
+	};
+};

arch/arm/boot/dts/imx6qdl-microsom.dtsi

@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2013,2014 Russell King
+ */
+
+&iomuxc {
+	microsom {
+		pinctrl_microsom_uart1: microsom-uart1 {
+			fsl,pins = <
+				MX6QDL_PAD_CSI0_DAT10__UART1_TX_DATA	0x1b0b1
+				MX6QDL_PAD_CSI0_DAT11__UART1_RX_DATA	0x1b0b1
+			>;
+		};
+
+		pinctrl_microsom_usbotg: microsom-usbotg {
+			/*
+			 * Similar to pinctrl_usbotg_2, but we want it
+			 * pulled down for a fixed host connection.
+			 */
+			fsl,pins = <MX6QDL_PAD_GPIO_1__USB_OTG_ID 0x13059>;
+		};
+	};
+};
+
+&uart1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_microsom_uart1>;
+	status = "okay";
+};
+
+&usbotg {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_microsom_usbotg>;
+};

arch/arm/include/asm/io.h

@@ -37,6 +37,12 @@
 #define isa_page_to_bus page_to_phys
 #define isa_bus_to_virt phys_to_virt
 
+/*
+ * Atomic MMIO-wide IO modify
+ */
+extern void atomic_io_modify(void __iomem *reg, u32 mask, u32 set);
+extern void atomic_io_modify_relaxed(void __iomem *reg, u32 mask, u32 set);
+
 /*
  * Generic IO read/write.  These perform native-endian accesses.  Note
  * that some architectures will want to re-define __raw_{read,write}w.

arch/arm/kernel/entry-armv.S

@@ -451,9 +451,11 @@ __und_usr_thumb:
 	.arch	armv6t2
 #endif
 2:	ldrht	r5, [r4]
+ARM_BE8(rev16	r5, r5)				@ little endian instruction
 	cmp	r5, #0xe800			@ 32bit instruction if xx != 0
 	blo	__und_usr_fault_16		@ 16bit undefined instruction
 3:	ldrht	r0, [r2]
+ARM_BE8(rev16	r0, r0)				@ little endian instruction
 	add	r2, r2, #2			@ r2 is PC + 2, make it PC + 4
 	str	r2, [sp, #S_PC]			@ it's a 2x16bit instr, update
 	orr	r0, r0, r5, lsl #16

arch/arm/kernel/head.S

@@ -52,7 +52,8 @@
 	.equ	swapper_pg_dir, KERNEL_RAM_VADDR - PG_DIR_SIZE
 
 	.macro	pgtbl, rd, phys
-	add	\rd, \phys, #TEXT_OFFSET - PG_DIR_SIZE
+	add	\rd, \phys, #TEXT_OFFSET
+	sub	\rd, \rd, #PG_DIR_SIZE
 	.endm
 
 /*

arch/arm/kernel/io.c

@@ -1,6 +1,41 @@
 #include <linux/export.h>
 #include <linux/types.h>
 #include <linux/io.h>
+#include <linux/spinlock.h>
+
+static DEFINE_RAW_SPINLOCK(__io_lock);
+
+/*
+ * Generic atomic MMIO modify.
+ *
+ * Allows thread-safe access to registers shared by unrelated subsystems.
+ * The access is protected by a single MMIO-wide lock.
+ */
+void atomic_io_modify_relaxed(void __iomem *reg, u32 mask, u32 set)
+{
+	unsigned long flags;
+	u32 value;
+
+	raw_spin_lock_irqsave(&__io_lock, flags);
+	value = readl_relaxed(reg) & ~mask;
+	value |= (set & mask);
+	writel_relaxed(value, reg);
+	raw_spin_unlock_irqrestore(&__io_lock, flags);
+}
+EXPORT_SYMBOL(atomic_io_modify_relaxed);
+
+void atomic_io_modify(void __iomem *reg, u32 mask, u32 set)
+{
+	unsigned long flags;
+	u32 value;
+
+	raw_spin_lock_irqsave(&__io_lock, flags);
+	value = readl_relaxed(reg) & ~mask;
+	value |= (set & mask);
+	writel(value, reg);
+	raw_spin_unlock_irqrestore(&__io_lock, flags);
+}
+EXPORT_SYMBOL(atomic_io_modify);
 
 /*
  * Copy data from IO memory space to "real" memory space.

arch/arm/mach-imx/mach-imx6q.c

@@ -133,6 +133,39 @@ static int ar8031_phy_fixup(struct phy_device *dev)
 
 #define PHY_ID_AR8031	0x004dd074
 
+static int ar8035_phy_fixup(struct phy_device *dev)
+{
+	u16 val;
+
+	/* Ar803x phy SmartEEE feature cause link status generates glitch,
+	 * which cause ethernet link down/up issue, so disable SmartEEE
+	 */
+	phy_write(dev, 0xd, 0x3);
+	phy_write(dev, 0xe, 0x805d);
+	phy_write(dev, 0xd, 0x4003);
+
+	val = phy_read(dev, 0xe);
+	phy_write(dev, 0xe, val & ~(1 << 8));
+
+	/*
+	 * Enable 125MHz clock from CLK_25M on the AR8031.  This
+	 * is fed in to the IMX6 on the ENET_REF_CLK (V22) pad.
+	 * Also, introduce a tx clock delay.
+	 *
+	 * This is the same as is the AR8031 fixup.
+	 */
+	ar8031_phy_fixup(dev);
+
+	/*check phy power*/
+	val = phy_read(dev, 0x0);
+	if (val & BMCR_PDOWN)
+		phy_write(dev, 0x0, val & ~BMCR_PDOWN);
+
+	return 0;
+}
+
+#define PHY_ID_AR8035 0x004dd072
+
 static void __init imx6q_enet_phy_init(void)
 {
 	if (IS_BUILTIN(CONFIG_PHYLIB)) {
@@ -142,6 +175,8 @@ static void __init imx6q_enet_phy_init(void)
 				ksz9031rn_phy_fixup);
 		phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffff,
 				ar8031_phy_fixup);
+		phy_register_fixup_for_uid(PHY_ID_AR8035, 0xffffffef,
+				ar8035_phy_fixup);
 	}
 }
 

arch/arm/mm/init.c

@@ -290,10 +290,11 @@ void __init arm_memblock_init(struct meminfo *mi,
 #endif
 #ifdef CONFIG_BLK_DEV_INITRD
 	/* FDT scan will populate initrd_start */
-	if (initrd_start) {
+	if (initrd_start && !phys_initrd_size) {
 		phys_initrd_start = __virt_to_phys(initrd_start);
 		phys_initrd_size = initrd_end - initrd_start;
 	}
+	initrd_start = initrd_end = 0;
 	if (phys_initrd_size &&
 	    !memblock_is_region_memory(phys_initrd_start, phys_initrd_size)) {
 		pr_err("INITRD: 0x%08llx+0x%08lx is not a memory region - disabling initrd\n",