[PATCH v5 08/11] ARM: STi: Register CPUFreq device

Lee Jones
2015-12-08T14:32:01Z

DT will not allow pseudo-devices. Only devices which represent real
hardware are permitted. So we have to register the CPUFreq driver
from platform code instead.

Rather than create a new file, we're bundling this in with the SMP
functionality and renaming it from 'smp' to the more generic 'cpu'.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
arch/arm/mach-sti/Makefile | 2 +-
arch/arm/mach-sti/board-dt.c | 3 ++-
arch/arm/mach-sti/{platsmp.c => cpu.c} | 17 +++++++++++++++--
arch/arm/mach-sti/{smp.h => cpu.h} | 1 +
4 files changed, 19 insertions(+), 4 deletions(-)
rename arch/arm/mach-sti/{platsmp.c => cpu.c} (93%)
rename arch/arm/mach-sti/{smp.h => cpu.h} (93%)

diff --git a/arch/arm/mach-sti/Makefile b/arch/arm/mach-sti/Makefile
index acb3309..caaeeaa 100644
--- a/arch/arm/mach-sti/Makefile
+++ b/arch/arm/mach-sti/Makefile
@@ -1,2 +1,2 @@
-obj-$(CONFIG_SMP) += platsmp.o headsmp.o
+obj-$(CONFIG_SMP) += cpu.o headsmp.o
obj-$(CONFIG_ARCH_STI) += board-dt.o
diff --git a/arch/arm/mach-sti/board-dt.c b/arch/arm/mach-sti/board-dt.c
index ae10fb2..60b23a7 100644
--- a/arch/arm/mach-sti/board-dt.c
+++ b/arch/arm/mach-sti/board-dt.c
@@ -12,7 +12,7 @@
#include <asm/hardware/cache-l2x0.h>
#include <asm/mach/arch.h>

-#include "smp.h"
+#include "cpu.h"

static const char *const stih41x_dt_match[] __initconst = {
"st,stih415",
@@ -31,4 +31,5 @@ DT_MACHINE_START(STM, "STiH415/416 SoC with Flattened Device Tree")
L2C_AUX_CTRL_WAY_SIZE(4),
.l2c_aux_mask = 0xc0000fff,
.smp = smp_ops(sti_smp_ops),
+ .init_late = init_cpufreq,
MACHINE_END
diff --git a/arch/arm/mach-sti/platsmp.c b/arch/arm/mach-sti/cpu.c
similarity index 93%
rename from arch/arm/mach-sti/platsmp.c
rename to arch/arm/mach-sti/cpu.c
index c4ad6ea..335ecaf 100644
--- a/arch/arm/mach-sti/platsmp.c
+++ b/arch/arm/mach-sti/cpu.c
@@ -1,5 +1,5 @@
/*
- * arch/arm/mach-sti/platsmp.c
+ * arch/arm/mach-sti/cpu.c
*
* Copyright (C) 2013 STMicroelectronics (R&D) Limited.
* http://www.st.com
@@ -13,6 +13,7 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
+
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/delay.h>
@@ -21,13 +22,17 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/memblock.h>
+#include <linux/platform_device.h>

#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include <asm/smp_scu.h>

-#include "smp.h"
+#include "cpu.h"

+/**
+ * SMP Operations
+ */
static void write_pen_release(int val)
{
pen_release = val;
@@ -161,3 +166,11 @@ struct smp_operations __initdata sti_smp_ops = {
.smp_secondary_init = sti_secondary_init,
.smp_boot_secondary = sti_boot_secondary,
};
+
+/**
+ * CPUFreq Registration
+ */
+void init_cpufreq(void)
+{
+ platform_device_register_simple("sti-cpufreq", -1, NULL, 0);
+}
diff --git a/arch/arm/mach-sti/smp.h b/arch/arm/mach-sti/cpu.h
similarity index 93%
rename from arch/arm/mach-sti/smp.h
rename to arch/arm/mach-sti/cpu.h
index ae22707..957c4d1 100644
--- a/arch/arm/mach-sti/smp.h
+++ b/arch/arm/mach-sti/cpu.h
@@ -15,5 +15,6 @@
extern struct smp_operations sti_smp_ops;

void sti_secondary_startup(void);
+extern void init_cpufreq(void);

#endif
--
1.9.1