Merge tag 'renesas-soc-for-v3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/soc

Merge "Renesas ARM Based SoC Updates for v3.16" from Simon Horman:

SH Mobile shared SoC code
* Add shared shmobile_init_delay()

r8a7791 (R-Car M2) and r8a7790 (R-Car H2) SoCs (R-Car Gen2 shared code)
* Cache Mode Monitor Register Value

r8a7791 (R-Car M2) SoC
Check r8a7791 MD21 at SMP boot

r8a7790 (R-Car H2) SoC
* Make use of r8a7790_add_standard_devices()
* Update r8a7791 CPU freq to 1500MHz

r8a7778 (R-Car M1) SoC
* Move "select RENESAS_INTC_IRQPIN" under SoC

emev2 (Emma Mobale EV2) SoC
*  Remove legacy EMEV2 SoC support

* tag 'renesas-soc-for-v3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  ARM: shmobile: r8a7778/bockw: Move "select RENESAS_INTC_IRQPIN" under SoC
  ARM: shmobile: Check r8a7791 MD21 at SMP boot
  ARM: shmobile: rcar-gen2: Cache Mode Monitor Register Value
  ARM: shmobile: Make use of r8a7790_add_standard_devices()
  ARM: shmobile: Remove EMEV2 header file
  ARM: shmobile: Remove legacy EMEV2 SoC support
  ARM: shmobile: Add shared shmobile_init_delay()
  ARM: shmobile: Update r8a7791 CPU freq to 1500MHz in C

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

1 files changed, 28 insertions, 0 deletions

diff --git a/arch/arm/mach-shmobile/timer.c b/arch/arm/mach-shmobile/timer.c
index 62d7052d6f21..ccecde9a3362 100644
--- a/arch/arm/mach-shmobile/timer.c
+++ b/arch/arm/mach-shmobile/timer.c
@@ -21,6 +21,7 @@
 #include <linux/platform_device.h>
 #include <linux/clocksource.h>
 #include <linux/delay.h>
+#include <linux/of_address.h>
 
 void __init shmobile_setup_delay(unsigned int max_cpu_core_mhz,
 				 unsigned int mult, unsigned int div)
@@ -39,6 +40,33 @@ void __init shmobile_setup_delay(unsigned int max_cpu_core_mhz,
 		preset_lpj = max_cpu_core_mhz * value;
 }
 
+void __init shmobile_init_delay(void)
+{
+	struct device_node *np, *parent;
+	u32 max_freq, freq;
+
+	max_freq = 0;
+
+	parent = of_find_node_by_path("/cpus");
+	if (parent) {
+		for_each_child_of_node(parent, np) {
+			if (!of_property_read_u32(np, "clock-frequency", &freq))
+				max_freq = max(max_freq, freq);
+		}
+		of_node_put(parent);
+	}
+
+	if (max_freq) {
+		if (of_find_compatible_node(NULL, NULL, "arm,cortex-a8"))
+			shmobile_setup_delay(max_freq, 1, 3);
+		else if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
+			shmobile_setup_delay(max_freq, 1, 3);
+		else if (of_find_compatible_node(NULL, NULL, "arm,cortex-a15"))
+			if (!IS_ENABLED(CONFIG_ARM_ARCH_TIMER))
+				shmobile_setup_delay(max_freq, 2, 4);
+	}
+}
+
 static void __init shmobile_late_time_init(void)
 {
 	/*