Merge tag 'arm-soc/for-4.15/soc' of http://github.com/Broadcom/stblinux into next/soc

Pull "Broadcom soc changes for 4.15 (part 1)" from Florian Fainelli:

This pull request contains Broadcom ARM-based SoC/Kconfig changes for 4.15
please pull the following:

- Danilo removes the clock provider driver stubs which are no longer needed
  now that we have a proper CPRMAN clock provider driver

- Stefan moves the SMP startup code for BCM2836 from the interrupt controller
  driver down to where it belongs in the architecture code, this was requested
  by Marc Zyngier before comitting any fixes to that code

- Phil provides a fix for a future Raspberry Pi firmware which will make the
  secondary cores wait for an event and therefore requires the CPU onlining
  other cores to send such event (along with the appropriate barrier)

- Florian fixes the BRCMSTB UART debug stub to work correctly when using an
  ARM BE8 kernel since there were some missing register read swapping needed

* tag 'arm-soc/for-4.15/soc' of http://github.com/Broadcom/stblinux:
  ARM: brcmstb: Add appropriate ARM_BE8() macros for swapping
  ARM: bcm2836: Send event when onlining other cores
  irqchip: bcm2836: Move SMP startup code to arch/arm (v2)
  clk: bcm2835: remove remains from stub clk driver

10 files changed, 132 insertions, 139 deletions

diff --git a/arch/arm/include/debug/brcmstb.S b/arch/arm/include/debug/brcmstb.S
index 52aaed2b936f..c826f15d2f80 100644
--- a/arch/arm/include/debug/brcmstb.S
+++ b/arch/arm/include/debug/brcmstb.S
@@ -58,6 +58,7 @@
 		/* Check SUN_TOP_CTRL base */
 		ldr	\rp, =SUN_TOP_CTRL_BASE	@ load SUN_TOP_CTRL PA
 		ldr	\rv, [\rp, #0]		@ get register contents
+ARM_BE8(	rev	\rv, \rv )
 		and	\rv, \rv, #0xffffff00	@ strip revision bits [7:0]
 
 		/* Chip specific detection starts here */
@@ -98,11 +99,13 @@
 		.endm
 
 		.macro	store, rd, rx:vararg
+ARM_BE8(	rev	\rd, \rd )
 		str	\rd, \rx
 		.endm
 
 		.macro	load, rd, rx:vararg
 		ldr	\rd, \rx
+ARM_BE8(	rev	\rd, \rd )
 		.endm
 
 		.macro	senduart,rd,rx
diff --git a/arch/arm/mach-bcm/Makefile b/arch/arm/mach-bcm/Makefile
index 980f5850097c..62a59008c5a8 100644
--- a/arch/arm/mach-bcm/Makefile
+++ b/arch/arm/mach-bcm/Makefile
@@ -43,6 +43,11 @@ endif
 
 # BCM2835
 obj-$(CONFIG_ARCH_BCM2835)	+= board_bcm2835.o
+ifeq ($(CONFIG_ARCH_BCM2835),y)
+ifeq ($(CONFIG_ARM),y)
+obj-$(CONFIG_SMP)		+= platsmp.o
+endif
+endif
 
 # BCM5301X
 obj-$(CONFIG_ARCH_BCM_5301X)	+= bcm_5301x.o
diff --git a/arch/arm/mach-bcm/board_bcm2835.c b/arch/arm/mach-bcm/board_bcm2835.c
index 0c1edfc98696..8cff865ace04 100644
--- a/arch/arm/mach-bcm/board_bcm2835.c
+++ b/arch/arm/mach-bcm/board_bcm2835.c
@@ -15,15 +15,11 @@
 #include <linux/init.h>
 #include <linux/irqchip.h>
 #include <linux/of_address.h>
-#include <linux/clk/bcm2835.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
 
-static void __init bcm2835_init(void)
-{
-	bcm2835_init_clocks();
-}
+#include "platsmp.h"
 
 static const char * const bcm2835_compat[] = {
 #ifdef CONFIG_ARCH_MULTI_V6
@@ -31,11 +27,12 @@ static const char * const bcm2835_compat[] = {
 #endif
 #ifdef CONFIG_ARCH_MULTI_V7
 	"brcm,bcm2836",
+	"brcm,bcm2837",
 #endif
 	NULL
 };
 
 DT_MACHINE_START(BCM2835, "BCM2835")
-	.init_machine = bcm2835_init,
-	.dt_compat = bcm2835_compat
+	.dt_compat = bcm2835_compat,
+	.smp = smp_ops(bcm2836_smp_ops),
 MACHINE_END
diff --git a/arch/arm/mach-bcm/platsmp.c b/arch/arm/mach-bcm/platsmp.c
index 9e3f275934eb..7d954830eb57 100644
--- a/arch/arm/mach-bcm/platsmp.c
+++ b/arch/arm/mach-bcm/platsmp.c
@@ -17,6 +17,7 @@
 #include <linux/errno.h>
 #include <linux/init.h>
 #include <linux/io.h>
+#include <linux/irqchip/irq-bcm2836.h>
 #include <linux/jiffies.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
@@ -287,6 +288,38 @@ out:
 	return ret;
 }
 
+static int bcm2836_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+	void __iomem *intc_base;
+	struct device_node *dn;
+	char *name;
+
+	name = "brcm,bcm2836-l1-intc";
+	dn = of_find_compatible_node(NULL, NULL, name);
+	if (!dn) {
+		pr_err("unable to find intc node\n");
+		return -ENODEV;
+	}
+
+	intc_base = of_iomap(dn, 0);
+	of_node_put(dn);
+
+	if (!intc_base) {
+		pr_err("unable to remap intc base register\n");
+		return -ENOMEM;
+	}
+
+	writel(virt_to_phys(secondary_startup),
+	       intc_base + LOCAL_MAILBOX3_SET0 + 16 * cpu);
+
+	dsb(sy);
+	sev();
+
+	iounmap(intc_base);
+
+	return 0;
+}
+
 static const struct smp_operations kona_smp_ops __initconst = {
 	.smp_prepare_cpus	= bcm_smp_prepare_cpus,
 	.smp_boot_secondary	= kona_boot_secondary,
@@ -305,3 +338,8 @@ static const struct smp_operations nsp_smp_ops __initconst = {
 	.smp_boot_secondary	= nsp_boot_secondary,
 };
 CPU_METHOD_OF_DECLARE(bcm_smp_nsp, "brcm,bcm-nsp-smp", &nsp_smp_ops);
+
+const struct smp_operations bcm2836_smp_ops __initconst = {
+	.smp_boot_secondary	= bcm2836_boot_secondary,
+};
+CPU_METHOD_OF_DECLARE(bcm_smp_bcm2836, "brcm,bcm2836-smp", &bcm2836_smp_ops);
diff --git a/arch/arm/mach-bcm/platsmp.h b/arch/arm/mach-bcm/platsmp.h
new file mode 100644
index 000000000000..b8b8b3fa350d
--- /dev/null
+++ b/arch/arm/mach-bcm/platsmp.h
@@ -0,0 +1,10 @@
+/*
+ * Copyright (C) 2017 Stefan Wahren <stefan.wahren@i2se.com>
+ *
+ * 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 version 2.
+ *
+ */
+
+extern const struct smp_operations bcm2836_smp_ops;
diff --git a/drivers/clk/bcm/clk-bcm2835-aux.c b/drivers/clk/bcm/clk-bcm2835-aux.c
index bd750cf2238d..77e276d61702 100644
--- a/drivers/clk/bcm/clk-bcm2835-aux.c
+++ b/drivers/clk/bcm/clk-bcm2835-aux.c
@@ -14,7 +14,6 @@
 
 #include <linux/clk.h>
 #include <linux/clk-provider.h>
-#include <linux/clk/bcm2835.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <dt-bindings/clock/bcm2835-aux.h>
diff --git a/drivers/clk/bcm/clk-bcm2835.c b/drivers/clk/bcm/clk-bcm2835.c
index 58ce6af8452d..44301a3d9963 100644
--- a/drivers/clk/bcm/clk-bcm2835.c
+++ b/drivers/clk/bcm/clk-bcm2835.c
@@ -37,7 +37,6 @@
 #include <linux/clk-provider.h>
 #include <linux/clkdev.h>
 #include <linux/clk.h>
-#include <linux/clk/bcm2835.h>
 #include <linux/debugfs.h>
 #include <linux/delay.h>
 #include <linux/module.h>
@@ -416,35 +415,6 @@ static int bcm2835_debugfs_regset(struct bcm2835_cprman *cprman, u32 base,
 	return regdump ? 0 : -ENOMEM;
 }
 
-/*
- * These are fixed clocks. They're probably not all root clocks and it may
- * be possible to turn them on and off but until this is mapped out better
- * it's the only way they can be used.
- */
-void __init bcm2835_init_clocks(void)
-{
-	struct clk_hw *hw;
-	int ret;
-
-	hw = clk_hw_register_fixed_rate(NULL, "apb_pclk", NULL, 0, 126000000);
-	if (IS_ERR(hw))
-		pr_err("apb_pclk not registered\n");
-
-	hw = clk_hw_register_fixed_rate(NULL, "uart0_pclk", NULL, 0, 3000000);
-	if (IS_ERR(hw))
-		pr_err("uart0_pclk not registered\n");
-	ret = clk_hw_register_clkdev(hw, NULL, "20201000.uart");
-	if (ret)
-		pr_err("uart0_pclk alias not registered\n");
-
-	hw = clk_hw_register_fixed_rate(NULL, "uart1_pclk", NULL, 0, 125000000);
-	if (IS_ERR(hw))
-		pr_err("uart1_pclk not registered\n");
-	ret = clk_hw_register_clkdev(hw, NULL, "20215000.uart");
-	if (ret)
-		pr_err("uart1_pclk alias not registered\n");
-}
-
 struct bcm2835_pll_data {
 	const char *name;
 	u32 cm_ctrl_reg;
diff --git a/drivers/irqchip/irq-bcm2836.c b/drivers/irqchip/irq-bcm2836.c
index dc8c1e3eafe7..667b9e14b032 100644
--- a/drivers/irqchip/irq-bcm2836.c
+++ b/drivers/irqchip/irq-bcm2836.c
@@ -19,62 +19,9 @@
 #include <linux/of_irq.h>
 #include <linux/irqchip.h>
 #include <linux/irqdomain.h>
-#include <asm/exception.h>
-
-#define LOCAL_CONTROL			0x000
-#define LOCAL_PRESCALER			0x008
+#include <linux/irqchip/irq-bcm2836.h>
 
-/*
- * The low 2 bits identify the CPU that the GPU IRQ goes to, and the
- * next 2 bits identify the CPU that the GPU FIQ goes to.
- */
-#define LOCAL_GPU_ROUTING		0x00c
-/* When setting bits 0-3, enables PMU interrupts on that CPU. */
-#define LOCAL_PM_ROUTING_SET		0x010
-/* When setting bits 0-3, disables PMU interrupts on that CPU. */
-#define LOCAL_PM_ROUTING_CLR		0x014
-/*
- * The low 4 bits of this are the CPU's timer IRQ enables, and the
- * next 4 bits are the CPU's timer FIQ enables (which override the IRQ
- * bits).
- */
-#define LOCAL_TIMER_INT_CONTROL0	0x040
-/*
- * The low 4 bits of this are the CPU's per-mailbox IRQ enables, and
- * the next 4 bits are the CPU's per-mailbox FIQ enables (which
- * override the IRQ bits).
- */
-#define LOCAL_MAILBOX_INT_CONTROL0	0x050
-/*
- * The CPU's interrupt status register.  Bits are defined by the the
- * LOCAL_IRQ_* bits below.
- */
-#define LOCAL_IRQ_PENDING0		0x060
-/* Same status bits as above, but for FIQ. */
-#define LOCAL_FIQ_PENDING0		0x070
-/*
- * Mailbox write-to-set bits.  There are 16 mailboxes, 4 per CPU, and
- * these bits are organized by mailbox number and then CPU number.  We
- * use mailbox 0 for IPIs.  The mailbox's interrupt is raised while
- * any bit is set.
- */
-#define LOCAL_MAILBOX0_SET0		0x080
-#define LOCAL_MAILBOX3_SET0		0x08c
-/* Mailbox write-to-clear bits. */
-#define LOCAL_MAILBOX0_CLR0		0x0c0
-#define LOCAL_MAILBOX3_CLR0		0x0cc
-
-#define LOCAL_IRQ_CNTPSIRQ	0
-#define LOCAL_IRQ_CNTPNSIRQ	1
-#define LOCAL_IRQ_CNTHPIRQ	2
-#define LOCAL_IRQ_CNTVIRQ	3
-#define LOCAL_IRQ_MAILBOX0	4
-#define LOCAL_IRQ_MAILBOX1	5
-#define LOCAL_IRQ_MAILBOX2	6
-#define LOCAL_IRQ_MAILBOX3	7
-#define LOCAL_IRQ_GPU_FAST	8
-#define LOCAL_IRQ_PMU_FAST	9
-#define LAST_IRQ		LOCAL_IRQ_PMU_FAST
+#include <asm/exception.h>
 
 struct bcm2836_arm_irqchip_intc {
 	struct irq_domain *domain;
@@ -215,24 +162,6 @@ static int bcm2836_cpu_dying(unsigned int cpu)
 					     cpu);
 	return 0;
 }
-
-#ifdef CONFIG_ARM
-static int __init bcm2836_smp_boot_secondary(unsigned int cpu,
-					     struct task_struct *idle)
-{
-	unsigned long secondary_startup_phys =
-		(unsigned long)virt_to_phys((void *)secondary_startup);
-
-	writel(secondary_startup_phys,
-	       intc.base + LOCAL_MAILBOX3_SET0 + 16 * cpu);
-
-	return 0;
-}
-
-static const struct smp_operations bcm2836_smp_ops __initconst = {
-	.smp_boot_secondary	= bcm2836_smp_boot_secondary,
-};
-#endif
 #endif
 
 static const struct irq_domain_ops bcm2836_arm_irqchip_intc_ops = {
@@ -249,10 +178,6 @@ bcm2836_arm_irqchip_smp_init(void)
 			  bcm2836_cpu_dying);
 
 	set_smp_cross_call(bcm2836_arm_irqchip_send_ipi);
-
-#ifdef CONFIG_ARM
-	smp_set_ops(&bcm2836_smp_ops);
-#endif
 #endif
 }
 
diff --git a/include/linux/clk/bcm2835.h b/include/linux/clk/bcm2835.h
deleted file mode 100644
index aa937f6c17da..000000000000
--- a/include/linux/clk/bcm2835.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * Copyright (C) 2010 Broadcom
- *
- * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-
-#ifndef __LINUX_CLK_BCM2835_H_
-#define __LINUX_CLK_BCM2835_H_
-
-void __init bcm2835_init_clocks(void);
-
-#endif
diff --git a/include/linux/irqchip/irq-bcm2836.h b/include/linux/irqchip/irq-bcm2836.h
new file mode 100644
index 000000000000..218a6e1b18d8
--- /dev/null
+++ b/include/linux/irqchip/irq-bcm2836.h
@@ -0,0 +1,70 @@
+/*
+ * Root interrupt controller for the BCM2836 (Raspberry Pi 2).
+ *
+ * Copyright 2015 Broadcom
+ *
+ * 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.
+ */
+
+#define LOCAL_CONTROL			0x000
+#define LOCAL_PRESCALER			0x008
+
+/*
+ * The low 2 bits identify the CPU that the GPU IRQ goes to, and the
+ * next 2 bits identify the CPU that the GPU FIQ goes to.
+ */
+#define LOCAL_GPU_ROUTING		0x00c
+/* When setting bits 0-3, enables PMU interrupts on that CPU. */
+#define LOCAL_PM_ROUTING_SET		0x010
+/* When setting bits 0-3, disables PMU interrupts on that CPU. */
+#define LOCAL_PM_ROUTING_CLR		0x014
+/*
+ * The low 4 bits of this are the CPU's timer IRQ enables, and the
+ * next 4 bits are the CPU's timer FIQ enables (which override the IRQ
+ * bits).
+ */
+#define LOCAL_TIMER_INT_CONTROL0	0x040
+/*
+ * The low 4 bits of this are the CPU's per-mailbox IRQ enables, and
+ * the next 4 bits are the CPU's per-mailbox FIQ enables (which
+ * override the IRQ bits).
+ */
+#define LOCAL_MAILBOX_INT_CONTROL0	0x050
+/*
+ * The CPU's interrupt status register.  Bits are defined by the the
+ * LOCAL_IRQ_* bits below.
+ */
+#define LOCAL_IRQ_PENDING0		0x060
+/* Same status bits as above, but for FIQ. */
+#define LOCAL_FIQ_PENDING0		0x070
+/*
+ * Mailbox write-to-set bits.  There are 16 mailboxes, 4 per CPU, and
+ * these bits are organized by mailbox number and then CPU number.  We
+ * use mailbox 0 for IPIs.  The mailbox's interrupt is raised while
+ * any bit is set.
+ */
+#define LOCAL_MAILBOX0_SET0		0x080
+#define LOCAL_MAILBOX3_SET0		0x08c
+/* Mailbox write-to-clear bits. */
+#define LOCAL_MAILBOX0_CLR0		0x0c0
+#define LOCAL_MAILBOX3_CLR0		0x0cc
+
+#define LOCAL_IRQ_CNTPSIRQ	0
+#define LOCAL_IRQ_CNTPNSIRQ	1
+#define LOCAL_IRQ_CNTHPIRQ	2
+#define LOCAL_IRQ_CNTVIRQ	3
+#define LOCAL_IRQ_MAILBOX0	4
+#define LOCAL_IRQ_MAILBOX1	5
+#define LOCAL_IRQ_MAILBOX2	6
+#define LOCAL_IRQ_MAILBOX3	7
+#define LOCAL_IRQ_GPU_FAST	8
+#define LOCAL_IRQ_PMU_FAST	9
+#define LAST_IRQ		LOCAL_IRQ_PMU_FAST