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

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

r8a7791 (R-Car H2) SoC and its Koelsch board and,
r8a7740 (R-Mobile A1) SoC and its Armadillo800eva board
* Set CPU clock frequency from OF nodes

* tag 'renesas-soc-cleanup-for-v3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  ARM: shmobile: Set clock frequency in HZ from OF nodes
  ARM: shmobile: Use shmobile_init_late() on r8a7740
  ARM: shmobile: Remove unused r8a7791_init_early()
  ARM: shmobile: Use r8a7791 DT CPU Frequency for Koelsch
  ARM: shmobile: Use r8a7791 DT CPU Frequency in common case
  ARM: shmobile: Remove unused r8a7740_init_delay()
  ARM: shmobile: Use r8a7740 DT CPU Frequency for Armadillo DT Ref
  ARM: shmobile: Use r8a7740 DT CPU Frequency in common case
  ARM: shmobile: Add r8a7740 Maximum CPU Frequency to DTS

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

arch/arm/boot/dts/r8a7740.dtsi

@@ -22,6 +22,7 @@
 			compatible = "arm,cortex-a9";
 			device_type = "cpu";
 			reg = <0x0>;
+			clock-frequency = <800000000>;
 		};
 	};
 

arch/arm/mach-shmobile/board-armadillo800eva-reference.c

@@ -187,7 +187,7 @@ static const char *eva_boards_compat_dt[] __initdata = {
 
 DT_MACHINE_START(ARMADILLO800EVA_DT, "armadillo800eva-reference")
 	.map_io		= r8a7740_map_io,
-	.init_early	= r8a7740_init_delay,
+	.init_early	= shmobile_init_delay,
 	.init_irq	= r8a7740_init_irq_of,
 	.init_machine	= eva_init,
 	.init_late	= shmobile_init_late,

arch/arm/mach-shmobile/board-koelsch-reference.c

@@ -139,7 +139,7 @@ static const char * const koelsch_boards_compat_dt[] __initconst = {
 
 DT_MACHINE_START(KOELSCH_DT, "koelsch")
 	.smp		= smp_ops(r8a7791_smp_ops),
-	.init_early	= r8a7791_init_early,
+	.init_early	= shmobile_init_delay,
 	.init_time	= rcar_gen2_timer_init,
 	.init_machine	= koelsch_add_standard_devices,
 	.init_late	= shmobile_init_late,

arch/arm/mach-shmobile/board-koelsch.c

@@ -522,7 +522,7 @@ static const char * const koelsch_boards_compat_dt[] __initconst = {
 
 DT_MACHINE_START(KOELSCH_DT, "koelsch")
 	.smp		= smp_ops(r8a7791_smp_ops),
-	.init_early	= r8a7791_init_early,
+	.init_early	= shmobile_init_delay,
 	.init_time	= rcar_gen2_timer_init,
 	.init_machine	= koelsch_init,
 	.init_late	= shmobile_init_late,

arch/arm/mach-shmobile/include/mach/r8a7740.h

@@ -47,7 +47,6 @@ enum {
 };
 
 extern void r8a7740_meram_workaround(void);
-extern void r8a7740_init_delay(void);
 extern void r8a7740_init_irq_of(void);
 extern void r8a7740_map_io(void);
 extern void r8a7740_add_early_devices(void);

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

@@ -5,7 +5,6 @@ void r8a7791_add_standard_devices(void);
 void r8a7791_add_dt_devices(void);
 void r8a7791_clock_init(void);
 void r8a7791_pinmux_init(void);
-void r8a7791_init_early(void);
 extern struct smp_operations r8a7791_smp_ops;
 
 #endif /* __ASM_R8A7791_H__ */

arch/arm/mach-shmobile/setup-r8a7740.c

@@ -887,11 +887,6 @@ void __init r8a7740_add_standard_devices_dt(void)
 	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 }
 
-void __init r8a7740_init_delay(void)
-{
-	shmobile_setup_delay(800, 1, 3); /* Cortex-A9 @ 800MHz */
-};
-
 void __init r8a7740_init_irq_of(void)
 {
 	void __iomem *intc_prio_base = ioremap_nocache(0xe6900010, 0x10);
@@ -935,9 +930,10 @@ static const char *r8a7740_boards_compat_dt[] __initdata = {
 
 DT_MACHINE_START(R8A7740_DT, "Generic R8A7740 (Flattened Device Tree)")
 	.map_io		= r8a7740_map_io,
-	.init_early	= r8a7740_init_delay,
+	.init_early	= shmobile_init_delay,
 	.init_irq	= r8a7740_init_irq_of,
 	.init_machine	= r8a7740_generic_init,
+	.init_late	= shmobile_init_late,
 	.dt_compat	= r8a7740_boards_compat_dt,
 MACHINE_END
 

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

@@ -210,13 +210,6 @@ void __init r8a7791_add_standard_devices(void)
 	r8a7791_register_thermal();
 }
 
-void __init r8a7791_init_early(void)
-{
-#ifndef CONFIG_ARM_ARCH_TIMER
-	shmobile_setup_delay(1500, 2, 4); /* Cortex-A15 @ 1500MHz */
-#endif
-}
-
 #ifdef CONFIG_USE_OF
 static const char *r8a7791_boards_compat_dt[] __initdata = {
 	"renesas,r8a7791",
@@ -225,7 +218,7 @@ static const char *r8a7791_boards_compat_dt[] __initdata = {
 
 DT_MACHINE_START(R8A7791_DT, "Generic R8A7791 (Flattened Device Tree)")
 	.smp		= smp_ops(r8a7791_smp_ops),
-	.init_early	= r8a7791_init_early,
+	.init_early	= shmobile_init_delay,
 	.init_time	= rcar_gen2_timer_init,
 	.dt_compat	= r8a7791_boards_compat_dt,
 MACHINE_END

arch/arm/mach-shmobile/timer.c

@@ -23,6 +23,23 @@
 #include <linux/delay.h>
 #include <linux/of_address.h>
 
+void __init shmobile_setup_delay_hz(unsigned int max_cpu_core_hz,
+				    unsigned int mult, unsigned int div)
+{
+	/* calculate a worst-case loops-per-jiffy value
+	 * based on maximum cpu core hz setting and the
+	 * __delay() implementation in arch/arm/lib/delay.S
+	 *
+	 * this will result in a longer delay than expected
+	 * when the cpu core runs on lower frequencies.
+	 */
+
+	unsigned int value = HZ * div / mult;
+
+	if (!preset_lpj)
+		preset_lpj = max_cpu_core_hz / value;
+}
+
 void __init shmobile_setup_delay(unsigned int max_cpu_core_mhz,
 				 unsigned int mult, unsigned int div)
 {
@@ -58,12 +75,12 @@ void __init shmobile_init_delay(void)
 
 	if (max_freq) {
 		if (of_find_compatible_node(NULL, NULL, "arm,cortex-a8"))
-			shmobile_setup_delay(max_freq, 1, 3);
+			shmobile_setup_delay_hz(max_freq, 1, 3);
 		else if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
-			shmobile_setup_delay(max_freq, 1, 3);
+			shmobile_setup_delay_hz(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);
+				shmobile_setup_delay_hz(max_freq, 2, 4);
 	}
 }