Merge tag 'renesas-soc-for-v3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/soc

Merge "Renesas ARM Based SoC Updates for v3.17" from Simon Horman:

- Use shmobile_init_late on r8a7791 and r8a7790 whien booting using DT-only
- Support Core-Standby for Suspend to RAM on r8a7791 and r8a7790 SoCs
- Shared CMA reservation for R-Car Gen2 SoCs
- Add r8a7791 SYSC power management support

* tag 'renesas-soc-for-v3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  ARM: shmobile: Remove ARCH_HAS_CPUFREQ config for shmobile
  ARM: shmobile: rcar-gen2: update call to dma_contiguous_reserve_area
  ARM: shmobile: rcar-gen2: correct return value of shmobile_smp_apmu_suspend_init
  ARM: shmobile: rcar-gen2: Remove useless copied section for LongTrail
  ARM: shmobile: rcar-gen2: Use "1ULL" instead of "(u64)1"
  ARM: shmobile: rcar-gen2: Update for of_get_flat_dt_prop() update
  ARM: shmobile: Add shared R-Car Gen2 CMA reservation code
  ARM: shmobile: Use shmobile_init_late() on r8a7791 DT-only
  ARM: shmobile: Use shmobile_init_late() on r8a7790 DT-only
  ARM: shmobile: Mark all SoCs in shmobile as CPUFreq, capable
  ARM: shmobile: r8a7791: Support Core-Standby for Suspend to RAM
  ARM: shmobile: r8a7790: Support Core-Standby for Suspend to RAM
  ARM: shmobile: APMU: Add Core-Standby-state for Suspend to RAM
  ARM: shmobile: r8a7791 SYSC setup code

Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/mach-shmobile/Kconfig

@@ -12,6 +12,7 @@ menuconfig ARCH_SHMOBILE_MULTI
 	select NO_IOPORT_MAP
 	select PINCTRL
 	select ARCH_REQUIRE_GPIOLIB
+	select ARCH_HAS_OPP
 
 if ARCH_SHMOBILE_MULTI
 

arch/arm/mach-shmobile/Makefile

@@ -54,6 +54,7 @@ obj-$(CONFIG_ARCH_SH73A0)	+= pm-sh73a0.o
 obj-$(CONFIG_ARCH_R8A7740)	+= pm-r8a7740.o pm-rmobile.o
 obj-$(CONFIG_ARCH_R8A7779)	+= pm-r8a7779.o pm-rcar.o
 obj-$(CONFIG_ARCH_R8A7790)	+= pm-r8a7790.o pm-rcar.o
+obj-$(CONFIG_ARCH_R8A7791)	+= pm-r8a7791.o pm-rcar.o
 
 # Board objects
 ifdef CONFIG_ARCH_SHMOBILE_MULTI

arch/arm/mach-shmobile/common.h

@@ -35,8 +35,10 @@ extern void shmobile_cpuidle_set_driver(struct cpuidle_driver *drv);
 
 #ifdef CONFIG_SUSPEND
 int shmobile_suspend_init(void);
+void shmobile_smp_apmu_suspend_init(void);
 #else
 static inline int shmobile_suspend_init(void) { return 0; }
+static inline void shmobile_smp_apmu_suspend_init(void) { }
 #endif
 
 #ifdef CONFIG_CPU_IDLE

arch/arm/mach-shmobile/include/mach/r8a7791.h

@@ -5,6 +5,7 @@ void r8a7791_add_standard_devices(void);
 void r8a7791_add_dt_devices(void);
 void r8a7791_clock_init(void);
 void r8a7791_pinmux_init(void);
+void r8a7791_pm_init(void);
 extern struct smp_operations r8a7791_smp_ops;
 
 #endif /* __ASM_R8A7791_H__ */

arch/arm/mach-shmobile/platsmp-apmu.c

@@ -7,15 +7,19 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
+#include <linux/cpu_pm.h>
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/ioport.h>
 #include <linux/of_address.h>
 #include <linux/smp.h>
+#include <linux/suspend.h>
 #include <asm/cacheflush.h>
 #include <asm/cp15.h>
+#include <asm/proc-fns.h>
 #include <asm/smp_plat.h>
+#include <asm/suspend.h>
 #include "common.h"
 
 static struct {
@@ -141,7 +145,7 @@ int shmobile_smp_apmu_boot_secondary(unsigned int cpu, struct task_struct *idle)
 	return apmu_wrap(cpu, apmu_power_on);
 }
 
-#ifdef CONFIG_HOTPLUG_CPU
+#if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_SUSPEND)
 /* nicked from arch/arm/mach-exynos/hotplug.c */
 static inline void cpu_enter_lowpower_a15(void)
 {
@@ -172,16 +176,40 @@ static inline void cpu_enter_lowpower_a15(void)
 	dsb();
 }
 
-void shmobile_smp_apmu_cpu_die(unsigned int cpu)
+void shmobile_smp_apmu_cpu_shutdown(unsigned int cpu)
 {
-	/* For this particular CPU deregister boot vector */
-	shmobile_smp_hook(cpu, 0, 0);
 
 	/* Select next sleep mode using the APMU */
 	apmu_wrap(cpu, apmu_power_off);
 
 	/* Do ARM specific CPU shutdown */
 	cpu_enter_lowpower_a15();
+}
+
+static inline void cpu_leave_lowpower(void)
+{
+	unsigned int v;
+
+	asm volatile("mrc    p15, 0, %0, c1, c0, 0\n"
+		     "       orr     %0, %0, %1\n"
+		     "       mcr     p15, 0, %0, c1, c0, 0\n"
+		     "       mrc     p15, 0, %0, c1, c0, 1\n"
+		     "       orr     %0, %0, %2\n"
+		     "       mcr     p15, 0, %0, c1, c0, 1\n"
+		     : "=&r" (v)
+		     : "Ir" (CR_C), "Ir" (0x40)
+		     : "cc");
+}
+#endif
+
+#if defined(CONFIG_HOTPLUG_CPU)
+void shmobile_smp_apmu_cpu_die(unsigned int cpu)
+{
+	/* For this particular CPU deregister boot vector */
+	shmobile_smp_hook(cpu, 0, 0);
+
+	/* Shutdown CPU core */
+	shmobile_smp_apmu_cpu_shutdown(cpu);
 
 	/* jump to shared mach-shmobile sleep / reset code */
 	shmobile_smp_sleep();
@@ -192,3 +220,27 @@ int shmobile_smp_apmu_cpu_kill(unsigned int cpu)
 	return apmu_wrap(cpu, apmu_power_off_poll);
 }
 #endif
+
+#if defined(CONFIG_SUSPEND)
+static int shmobile_smp_apmu_do_suspend(unsigned long cpu)
+{
+	shmobile_smp_hook(cpu, virt_to_phys(cpu_resume), 0);
+	shmobile_smp_apmu_cpu_shutdown(cpu);
+	cpu_do_idle(); /* WFI selects Core Standby */
+	return 1;
+}
+
+static int shmobile_smp_apmu_enter_suspend(suspend_state_t state)
+{
+	cpu_suspend(smp_processor_id(), shmobile_smp_apmu_do_suspend);
+	cpu_leave_lowpower();
+	return 0;
+}
+
+void shmobile_smp_apmu_suspend_init(void)
+{
+	shmobile_suspend_ops.enter = shmobile_smp_apmu_enter_suspend;
+}
+#else
+void shmobile_smp_apmu_suspend_init(void) {}
+#endif

arch/arm/mach-shmobile/pm-r8a7791.c

@@ -0,0 +1,47 @@
+/*
+ * r8a7791 Power management support
+ *
+ * Copyright (C) 2014  Renesas Electronics Corporation
+ * Copyright (C) 2011  Renesas Solutions Corp.
+ * Copyright (C) 2011  Magnus Damm
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <asm/io.h>
+#include <linux/kernel.h>
+#include <mach/r8a7791.h>
+#include "pm-rcar.h"
+
+/* SYSC */
+#define SYSCIER 0x0c
+#define SYSCIMR 0x10
+
+#if defined(CONFIG_SMP)
+
+static void __init r8a7791_sysc_init(void)
+{
+	void __iomem *base = rcar_sysc_init(0xe6180000);
+
+	/* enable all interrupt sources, but do not use interrupt handler */
+	iowrite32(0x0131000e, base + SYSCIER);
+	iowrite32(0, base + SYSCIMR);
+}
+
+#else /* CONFIG_SMP */
+
+static inline void r8a7791_sysc_init(void) {}
+
+#endif /* CONFIG_SMP */
+
+void __init r8a7791_pm_init(void)
+{
+	static int once;
+
+	if (once++)
+		return;
+
+	r8a7791_sysc_init();
+}

arch/arm/mach-shmobile/rcar-gen2.h

@@ -4,5 +4,6 @@
 void rcar_gen2_timer_init(void);
 #define MD(nr) BIT(nr)
 u32 rcar_gen2_read_mode_pins(void);
+void rcar_gen2_reserve(void);
 
 #endif /* __ASM_RCAR_GEN2_H__ */

arch/arm/mach-shmobile/setup-r8a7790.c

@@ -326,6 +326,8 @@ DT_MACHINE_START(R8A7790_DT, "Generic R8A7790 (Flattened Device Tree)")
 	.smp		= smp_ops(r8a7790_smp_ops),
 	.init_early	= r8a7790_init_early,
 	.init_time	= rcar_gen2_timer_init,
+	.init_late	= shmobile_init_late,
+	.reserve	= rcar_gen2_reserve,
 	.dt_compat	= r8a7790_boards_compat_dt,
 MACHINE_END
 #endif /* CONFIG_USE_OF */

arch/arm/mach-shmobile/setup-r8a7791.c

@@ -217,6 +217,8 @@ DT_MACHINE_START(R8A7791_DT, "Generic R8A7791 (Flattened Device Tree)")
 	.smp		= smp_ops(r8a7791_smp_ops),
 	.init_early	= shmobile_init_delay,
 	.init_time	= rcar_gen2_timer_init,
+	.init_late	= shmobile_init_late,
+	.reserve	= rcar_gen2_reserve,
 	.dt_compat	= r8a7791_boards_compat_dt,
 MACHINE_END
 #endif /* CONFIG_USE_OF */

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

@@ -20,8 +20,11 @@
 
 #include <linux/clk/shmobile.h>
 #include <linux/clocksource.h>
+#include <linux/device.h>
+#include <linux/dma-contiguous.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
+#include <linux/of_fdt.h>
 #include <asm/mach/arch.h>
 #include "common.h"
 #include "rcar-gen2.h"
@@ -110,3 +113,72 @@ void __init rcar_gen2_timer_init(void)
 #endif
 	clocksource_of_init();
 }
+
+struct memory_reserve_config {
+	u64 reserved;
+	u64 base, size;
+};
+
+static int __init rcar_gen2_scan_mem(unsigned long node, const char *uname,
+				     int depth, void *data)
+{
+	const char *type = of_get_flat_dt_prop(node, "device_type", NULL);
+	const __be32 *reg, *endp;
+	int l;
+	struct memory_reserve_config *mrc = data;
+	u64 lpae_start = 1ULL << 32;
+
+	/* We are scanning "memory" nodes only */
+	if (type == NULL || strcmp(type, "memory"))
+		return 0;
+
+	reg = of_get_flat_dt_prop(node, "linux,usable-memory", &l);
+	if (reg == NULL)
+		reg = of_get_flat_dt_prop(node, "reg", &l);
+	if (reg == NULL)
+		return 0;
+
+	endp = reg + (l / sizeof(__be32));
+	while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) {
+		u64 base, size;
+
+		base = dt_mem_next_cell(dt_root_addr_cells, &reg);
+		size = dt_mem_next_cell(dt_root_size_cells, &reg);
+
+		if (base >= lpae_start)
+			continue;
+
+		if ((base + size) >= lpae_start)
+			size = lpae_start - base;
+
+		if (size < mrc->reserved)
+			continue;
+
+		if (base < mrc->base)
+			continue;
+
+		/* keep the area at top near the 32-bit legacy limit */
+		mrc->base = base + size - mrc->reserved;
+		mrc->size = mrc->reserved;
+	}
+
+	return 0;
+}
+
+struct cma *rcar_gen2_dma_contiguous;
+
+void __init rcar_gen2_reserve(void)
+{
+	struct memory_reserve_config mrc;
+
+	/* reserve 256 MiB at the top of the physical legacy 32-bit space */
+	memset(&mrc, 0, sizeof(mrc));
+	mrc.reserved = SZ_256M;
+
+	of_scan_flat_dt(rcar_gen2_scan_mem, &mrc);
+#ifdef CONFIG_DMA_CMA
+	if (mrc.size)
+		dma_contiguous_reserve_area(mrc.size, mrc.base, 0,
+					    &rcar_gen2_dma_contiguous, true);
+#endif
+}

arch/arm/mach-shmobile/smp-r8a7790.c

@@ -69,6 +69,7 @@ static void __init r8a7790_smp_prepare_cpus(unsigned int max_cpus)
 
 	/* turn on power to SCU */
 	r8a7790_pm_init();
+	shmobile_smp_apmu_suspend_init();
 	rcar_sysc_power_up(&r8a7790_ca15_scu);
 	rcar_sysc_power_up(&r8a7790_ca7_scu);
 }

arch/arm/mach-shmobile/smp-r8a7791.c

@@ -50,6 +50,9 @@ static void __init r8a7791_smp_prepare_cpus(unsigned int max_cpus)
 	writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) | 0xa5a50000,
 		       p + CA15RESCNT);
 	iounmap(p);
+
+	r8a7791_pm_init();
+	shmobile_smp_apmu_suspend_init();
 }
 
 static int r8a7791_smp_boot_secondary(unsigned int cpu,