[PATCH v2 5/9] ARM: STi: Register CPUFreq device
From: Lee Jones <hidden>
Date: 2015-06-24 14:00:57
Also in:
linux-devicetree, linux-pm, lkml
Subsystem:
arm port, arm/sti architecture, the rest · Maintainers:
Russell King, Patrice Chotard, Linus Torvalds
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 <redacted>
---
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} | 2 ++
4 files changed, 20 insertions(+), 4 deletions(-)
rename arch/arm/mach-sti/{platsmp.c => cpu.c} (91%)
rename arch/arm/mach-sti/{smp.h => cpu.h} (92%)
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 b373aca..482159f 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 *stih41x_dt_match[] __initdata = { "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 91%
rename from arch/arm/mach-sti/platsmp.c
rename to arch/arm/mach-sti/cpu.c
index d4b624f..283cb30 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>
@@ -20,13 +21,17 @@ #include <linux/io.h> #include <linux/of.h> #include <linux/of_address.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;
@@ -114,3 +119,11 @@ 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 92%
rename from arch/arm/mach-sti/smp.h
rename to arch/arm/mach-sti/cpu.h
index 1871b72..39e05ff 100644
--- a/arch/arm/mach-sti/smp.h
+++ b/arch/arm/mach-sti/cpu.h@@ -14,4 +14,6 @@ extern struct smp_operations sti_smp_ops; +extern void init_cpufreq(void); + #endif
--
1.9.1