Merge tag 'renesas-arm-soc-for-v6.7-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel into soc/arm

Renesas ARM SoC updates for v6.7

  - Reserve boot area when SMP is enabled to prevent conflicts with
    FLASH,
  - Miscellaneous fixes and improvements.

* tag 'renesas-arm-soc-for-v6.7-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel:
  ARM: shmobile: sh73a0: Reserve boot area when SMP is enabled
  ARM: shmobile: r8a7779: Reserve boot area when SMP is enabled
  ARM: shmobile: rcar-gen2: Reserve boot area when SMP is enabled
  ARM: shmobile: rcar-gen2: Remove unneeded once handling

Link: https://lore.kernel.org/r/cover.1695985421.git.geert+renesas@glider.be
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Author: arndb

arch/arm/mach-shmobile/pm-rcar-gen2.c

@@ -46,15 +46,16 @@ void __init rcar_gen2_pm_init(void)
 {
 	void __iomem *p;
 	u32 bar;
-	static int once;
 	struct device_node *np;
 	bool has_a7 = false;
 	bool has_a15 = false;
 	struct resource res;
 	int error;
 
-	if (once++)
+	if (!request_mem_region(0, SZ_256K, "Boot Area")) {
+		pr_err("Failed to request boot area\n");
 		return;
+	}
 
 	for_each_of_cpu_node(np) {
 		if (of_device_is_compatible(np, "arm,cortex-a15"))

arch/arm/mach-shmobile/smp-r8a7779.c

@@ -38,7 +38,14 @@ static int r8a7779_boot_secondary(unsigned int cpu, struct task_struct *idle)
 
 static void __init r8a7779_smp_prepare_cpus(unsigned int max_cpus)
 {
-	void __iomem *base = ioremap(HPBREG_BASE, 0x1000);
+	void __iomem *base;
+
+	if (!request_mem_region(0, SZ_4K, "Boot Area")) {
+		pr_err("Failed to request boot area\n");
+		return;
+	}
+
+	base = ioremap(HPBREG_BASE, 0x1000);
 
 	/* Map the reset vector (in headsmp-scu.S, headsmp.S) */
 	writel(__pa(shmobile_boot_vector), base + AVECR);

arch/arm/mach-shmobile/smp-sh73a0.c

@@ -44,10 +44,16 @@ static int sh73a0_boot_secondary(unsigned int cpu, struct task_struct *idle)
 
 static void __init sh73a0_smp_prepare_cpus(unsigned int max_cpus)
 {
-	void __iomem *ap = ioremap(AP_BASE, PAGE_SIZE);
-	void __iomem *sysc = ioremap(SYSC_BASE, PAGE_SIZE);
+	void __iomem *ap, *sysc;
+
+	if (!request_mem_region(0, SZ_4K, "Boot Area")) {
+		pr_err("Failed to request boot area\n");
+		return;
+	}
 
 	/* Map the reset vector (in headsmp.S) */
+	ap = ioremap(AP_BASE, PAGE_SIZE);
+	sysc = ioremap(SYSC_BASE, PAGE_SIZE);
 	writel(0, ap + APARMBAREA);      /* 4k */
 	writel(__pa(shmobile_boot_vector), sysc + SBAR);
 	iounmap(sysc);