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[LTSI-3.14,840/894] ARM: shmobile: Move r8a7790 reset code to pm-r8a7790.c

Message ID 1409209620-24487-841-git-send-email-horms+renesas@verge.net.au (mailing list archive)
State New, archived
Headers show

Commit Message

Simon Horman Aug. 28, 2014, 7:06 a.m. UTC 
From: Magnus Damm <damm+renesas@opensource.se>

Move r8a7790 specific reset vector setup code from the
SMP glue code to PM code. This makes the code one step
closer to allow PM operations such as Suspend-to-RAM
in the case when SMP is disabled in the kernel config.

Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
[horms+renesas@verge.net.au: updated for recent #include changes]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

(cherry picked from commit 07ce9dfaf477e0d16d40faea251898d5a38d8051)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Conflicts:
	arch/arm/mach-shmobile/pm-r8a7790.c
---
 arch/arm/mach-shmobile/pm-r8a7790.c  | 40 ++++++++++++++++++++++++++++++++++--
 arch/arm/mach-shmobile/smp-r8a7790.c | 30 ---------------------------
 2 files changed, 38 insertions(+), 32 deletions(-)
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Patch

diff --git a/arch/arm/mach-shmobile/pm-r8a7790.c b/arch/arm/mach-shmobile/pm-r8a7790.c
index 8845433..c6efade 100644
--- a/arch/arm/mach-shmobile/pm-r8a7790.c
+++ b/arch/arm/mach-shmobile/pm-r8a7790.c
@@ -12,11 +12,23 @@ 
 
 #include <linux/kernel.h>
 
+#include <linux/smp.h>
 #include <asm/io.h>
 
+#include "common.h"
 #include "pm-rcar.h"
 #include "r8a7790.h"
 
+/* RST */
+#define RST		0xe6160000
+#define CA15BAR		0x0020
+#define CA7BAR		0x0030
+#define CA15RESCNT	0x0040
+#define CA7RESCNT	0x0044
+
+/* On-chip RAM */
+#define MERAM          0xe8080000
+
 /* SYSC */
 #define SYSCIER 0x0c
 #define SYSCIMR 0x10
@@ -40,8 +52,32 @@  static inline void r8a7790_sysc_init(void) {}
 
 void __init r8a7790_pm_init(void)
 {
+	void __iomem *p;
+	u32 bar;
 	static int once;
 
-	if (!once++)
-		r8a7790_sysc_init();
+	if (once++)
+		return;
+
+	/* MERAM for jump stub, because BAR requires 256KB aligned address */
+	p = ioremap_nocache(MERAM, shmobile_boot_size);
+	memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
+	iounmap(p);
+
+	/* setup reset vectors */
+	p = ioremap_nocache(RST, 0x63);
+	bar = (MERAM >> 8) & 0xfffffc00;
+	writel_relaxed(bar, p + CA15BAR);
+	writel_relaxed(bar, p + CA7BAR);
+	writel_relaxed(bar | 0x10, p + CA15BAR);
+	writel_relaxed(bar | 0x10, p + CA7BAR);
+
+	/* de-assert reset for all CPUs */
+	writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) | 0xa5a50000,
+		       p + CA15RESCNT);
+	writel_relaxed((readl_relaxed(p + CA7RESCNT) & ~0x0f) | 0x5a5a0000,
+		       p + CA7RESCNT);
+	iounmap(p);
+
+	r8a7790_sysc_init();
 }
diff --git a/arch/arm/mach-shmobile/smp-r8a7790.c b/arch/arm/mach-shmobile/smp-r8a7790.c
index ad66bea..8a2e7d5 100644
--- a/arch/arm/mach-shmobile/smp-r8a7790.c
+++ b/arch/arm/mach-shmobile/smp-r8a7790.c
@@ -24,13 +24,6 @@ 
 #include "pm-rcar.h"
 #include "r8a7790.h"
 
-#define RST		0xe6160000
-#define CA15BAR		0x0020
-#define CA7BAR		0x0030
-#define CA15RESCNT	0x0040
-#define CA7RESCNT	0x0044
-#define MERAM		0xe8080000
-
 static struct rcar_sysc_ch r8a7790_ca15_scu = {
 	.chan_offs = 0x180, /* PWRSR5 .. PWRER5 */
 	.isr_bit = 12, /* CA15-SCU */
@@ -43,32 +36,9 @@  static struct rcar_sysc_ch r8a7790_ca7_scu = {
 
 static void __init r8a7790_smp_prepare_cpus(unsigned int max_cpus)
 {
-	void __iomem *p;
-	u32 bar;
-
 	/* let APMU code install data related to shmobile_boot_vector */
 	shmobile_smp_apmu_prepare_cpus(max_cpus);
 
-	/* MERAM for jump stub, because BAR requires 256KB aligned address */
-	p = ioremap_nocache(MERAM, shmobile_boot_size);
-	memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
-	iounmap(p);
-
-	/* setup reset vectors */
-	p = ioremap_nocache(RST, 0x63);
-	bar = (MERAM >> 8) & 0xfffffc00;
-	writel_relaxed(bar, p + CA15BAR);
-	writel_relaxed(bar, p + CA7BAR);
-	writel_relaxed(bar | 0x10, p + CA15BAR);
-	writel_relaxed(bar | 0x10, p + CA7BAR);
-
-	/* enable clocks to all CPUs */
-	writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) | 0xa5a50000,
-		       p + CA15RESCNT);
-	writel_relaxed((readl_relaxed(p + CA7RESCNT) & ~0x0f) | 0x5a5a0000,
-		       p + CA7RESCNT);
-	iounmap(p);
-
 	/* turn on power to SCU */
 	r8a7790_pm_init();
 	shmobile_smp_apmu_suspend_init();