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cpufreq: cpu0: rename driver and internals to 'cpufreq_dt'

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The naming convention of this driver was always under the scanner, people
complained that it should have a more generic name than cpu0, as it manages all
CPUs that are sharing clock lines.

Also, in future it will be modified to support any number of clusters with
separate clock/voltage lines.

Lets rename it to 'cpufreq_dt' from 'cpufreq_cpu0'.

Tested-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2014-09-09 19:58:03 +05:30 committed by Rafael J. Wysocki
parent 0bf18f19be
commit bbcf071969
19 changed files with 46 additions and 46 deletions
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8
Documentation/devicetree/bindings/cpufreq/cpufreq-cpu0.txt → Documentation/devicetree/bindings/cpufreq/cpufreq-dt.txt
View File

@ -1,8 +1,8 @@
Generic CPU0 cpufreq driver
Generic cpufreq driver
It is a generic cpufreq driver for CPU0 frequency management. It
supports both uniprocessor (UP) and symmetric multiprocessor (SMP)
systems which share clock and voltage across all CPUs.
It is a generic DT based cpufreq driver for frequency management. It supports
both uniprocessor (UP) and symmetric multiprocessor (SMP) systems which share
clock and voltage across all CPUs.
Both required and optional properties listed below must be defined
under node /cpus/cpu@0.

2
arch/arm/configs/mvebu_v7_defconfig
View File

@ -32,7 +32,7 @@ CONFIG_ARM_ATAG_DTB_COMPAT=y
CONFIG_CPU_IDLE=y
CONFIG_ARM_MVEBU_V7_CPUIDLE=y
CONFIG_CPU_FREQ=y
CONFIG_CPUFREQ_GENERIC=y
CONFIG_CPUFREQ_DT=y
CONFIG_VFP=y
CONFIG_NET=y
CONFIG_INET=y

2
arch/arm/mach-imx/imx27-dt.c
View File

@ -20,7 +20,7 @@
static void __init imx27_dt_init(void)
{
struct platform_device_info devinfo = { .name = "cpufreq-cpu0", };
struct platform_device_info devinfo = { .name = "cpufreq-dt", };
mxc_arch_reset_init_dt();

2
arch/arm/mach-imx/mach-imx51.c
View File

@ -51,7 +51,7 @@ static void __init imx51_ipu_mipi_setup(void)
static void __init imx51_dt_init(void)
{
struct platform_device_info devinfo = { .name = "cpufreq-cpu0", };
struct platform_device_info devinfo = { .name = "cpufreq-dt", };
mxc_arch_reset_init_dt();
imx51_ipu_mipi_setup();

2
arch/arm/mach-mvebu/pmsu.c
View File

@ -644,7 +644,7 @@ static int __init armada_xp_pmsu_cpufreq_init(void)
}
}
platform_device_register_simple("cpufreq-generic", -1, NULL, 0);
platform_device_register_simple("cpufreq-dt", -1, NULL, 0);
return 0;
}

2
arch/arm/mach-omap2/pm.c
View File

@ -282,7 +282,7 @@ static inline void omap_init_cpufreq(void)
if (!of_have_populated_dt())
devinfo.name = "omap-cpufreq";
else
devinfo.name = "cpufreq-cpu0";
devinfo.name = "cpufreq-dt";
platform_device_register_full(&devinfo);
}

2
arch/arm/mach-shmobile/board-ape6evm-reference.c
View File

@ -50,7 +50,7 @@ static void __init ape6evm_add_standard_devices(void)
r8a73a4_add_dt_devices();
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
platform_device_register_simple("cpufreq-cpu0", -1, NULL, 0);
platform_device_register_simple("cpufreq-dt", -1, NULL, 0);
}
static const char *ape6evm_boards_compat_dt[] __initdata = {

2
arch/arm/mach-shmobile/cpufreq.c
View File

@ -12,6 +12,6 @@
int __init shmobile_cpufreq_init(void)
{
platform_device_register_simple("cpufreq-cpu0", -1, NULL, 0);
platform_device_register_simple("cpufreq-dt", -1, NULL, 0);
return 0;
}

4
arch/arm/mach-shmobile/setup-sh73a0.c
View File

@ -775,7 +775,7 @@ void __init sh73a0_add_early_devices(void)
void __init sh73a0_add_standard_devices_dt(void)
{
struct platform_device_info devinfo = { .name = "cpufreq-cpu0", .id = -1, };
struct platform_device_info devinfo = { .name = "cpufreq-dt", .id = -1, };
/* clocks are setup late during boot in the case of DT */
sh73a0_clock_init();
@ -784,7 +784,7 @@ void __init sh73a0_add_standard_devices_dt(void)
ARRAY_SIZE(sh73a0_devices_dt));
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
/* Instantiate cpufreq-cpu0 */
/* Instantiate cpufreq-dt */
platform_device_register_full(&devinfo);
}

2
arch/arm/mach-zynq/common.c
View File

@ -104,7 +104,7 @@ static int __init zynq_get_revision(void)
*/
static void __init zynq_init_machine(void)
{
struct platform_device_info devinfo = { .name = "cpufreq-cpu0", };
struct platform_device_info devinfo = { .name = "cpufreq-dt", };
struct soc_device_attribute *soc_dev_attr;
struct soc_device *soc_dev;
struct device *parent = NULL;

8
drivers/cpufreq/Kconfig
View File

@ -183,14 +183,14 @@ config CPU_FREQ_GOV_CONSERVATIVE
If in doubt, say N.
config GENERIC_CPUFREQ_CPU0
tristate "Generic CPU0 cpufreq driver"
config CPUFREQ_DT
tristate "Generic DT based cpufreq driver"
depends on HAVE_CLK && OF
# if CPU_THERMAL is on and THERMAL=m, CPU0 cannot be =y:
# if CPU_THERMAL is on and THERMAL=m, CPUFREQ_DT cannot be =y:
depends on !CPU_THERMAL || THERMAL
select PM_OPP
help
This adds a generic cpufreq driver for CPU0 frequency management.
This adds a generic DT based cpufreq driver for frequency management.
It supports both uniprocessor (UP) and symmetric multiprocessor (SMP)
systems which share clock and voltage across all CPUs.

2
drivers/cpufreq/Kconfig.arm
View File

@ -92,7 +92,7 @@ config ARM_EXYNOS_CPU_FREQ_BOOST_SW
config ARM_HIGHBANK_CPUFREQ
tristate "Calxeda Highbank-based"
depends on ARCH_HIGHBANK && GENERIC_CPUFREQ_CPU0 && REGULATOR
depends on ARCH_HIGHBANK && CPUFREQ_DT && REGULATOR
default m
help
This adds the CPUFreq driver for Calxeda Highbank SoC

2
drivers/cpufreq/Makefile
View File

@ -13,7 +13,7 @@ obj-$(CONFIG_CPU_FREQ_GOV_ONDEMAND) += cpufreq_ondemand.o
obj-$(CONFIG_CPU_FREQ_GOV_CONSERVATIVE) += cpufreq_conservative.o
obj-$(CONFIG_CPU_FREQ_GOV_COMMON) += cpufreq_governor.o
obj-$(CONFIG_GENERIC_CPUFREQ_CPU0) += cpufreq-cpu0.o
obj-$(CONFIG_CPUFREQ_DT) += cpufreq-dt.o
##################################################################################
# x86 drivers.

38
drivers/cpufreq/cpufreq-cpu0.c → drivers/cpufreq/cpufreq-dt.c
View File

@ -4,7 +4,7 @@
* Copyright (C) 2014 Linaro.
* Viresh Kumar <viresh.kumar@linaro.org>
*
* The OPP code in function cpu0_set_target() is reused from
* The OPP code in function set_target() is reused from
* drivers/cpufreq/omap-cpufreq.c
*
* This program is free software; you can redistribute it and/or modify
@ -35,7 +35,7 @@ struct private_data {
unsigned int voltage_tolerance; /* in percentage */
};
static int cpu0_set_target(struct cpufreq_policy *policy, unsigned int index)
static int set_target(struct cpufreq_policy *policy, unsigned int index)
{
struct dev_pm_opp *opp;
struct cpufreq_frequency_table *freq_table = policy->freq_table;
@ -176,7 +176,7 @@ try_again:
return ret;
}
static int cpu0_cpufreq_init(struct cpufreq_policy *policy)
static int cpufreq_init(struct cpufreq_policy *policy)
{
struct cpufreq_frequency_table *freq_table;
struct thermal_cooling_device *cdev;
@ -287,7 +287,7 @@ out_put_reg_clk:
return ret;
}
static int cpu0_cpufreq_exit(struct cpufreq_policy *policy)
static int cpufreq_exit(struct cpufreq_policy *policy)
{
struct private_data *priv = policy->driver_data;
@ -301,18 +301,18 @@ static int cpu0_cpufreq_exit(struct cpufreq_policy *policy)
return 0;
}
static struct cpufreq_driver cpu0_cpufreq_driver = {
static struct cpufreq_driver dt_cpufreq_driver = {
.flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = cpu0_set_target,
.target_index = set_target,
.get = cpufreq_generic_get,
.init = cpu0_cpufreq_init,
.exit = cpu0_cpufreq_exit,
.name = "generic_cpu0",
.init = cpufreq_init,
.exit = cpufreq_exit,
.name = "cpufreq-dt",
.attr = cpufreq_generic_attr,
};
static int cpu0_cpufreq_probe(struct platform_device *pdev)
static int dt_cpufreq_probe(struct platform_device *pdev)
{
struct device *cpu_dev;
struct regulator *cpu_reg;
@ -334,30 +334,30 @@ static int cpu0_cpufreq_probe(struct platform_device *pdev)
if (!IS_ERR(cpu_reg))
regulator_put(cpu_reg);
ret = cpufreq_register_driver(&cpu0_cpufreq_driver);
ret = cpufreq_register_driver(&dt_cpufreq_driver);
if (ret)
dev_err(cpu_dev, "failed register driver: %d\n", ret);
return ret;
}
static int cpu0_cpufreq_remove(struct platform_device *pdev)
static int dt_cpufreq_remove(struct platform_device *pdev)
{
cpufreq_unregister_driver(&cpu0_cpufreq_driver);
cpufreq_unregister_driver(&dt_cpufreq_driver);
return 0;
}
static struct platform_driver cpu0_cpufreq_platdrv = {
static struct platform_driver dt_cpufreq_platdrv = {
.driver = {
.name = "cpufreq-cpu0",
.name = "cpufreq-dt",
.owner = THIS_MODULE,
},
.probe = cpu0_cpufreq_probe,
.remove = cpu0_cpufreq_remove,
.probe = dt_cpufreq_probe,
.remove = dt_cpufreq_remove,
};
module_platform_driver(cpu0_cpufreq_platdrv);
module_platform_driver(dt_cpufreq_platdrv);
MODULE_AUTHOR("Viresh Kumar <viresh.kumar@linaro.org>");
MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
MODULE_DESCRIPTION("Generic CPU0 cpufreq driver");
MODULE_DESCRIPTION("Generic cpufreq driver");
MODULE_LICENSE("GPL");

2
drivers/cpufreq/exynos4210-cpufreq.c
View File

@ -127,7 +127,7 @@ int exynos4210_cpufreq_init(struct exynos_dvfs_info *info)
* dependencies on platform headers. It is necessary to enable
* Exynos multi-platform support and will be removed together with
* this whole driver as soon as Exynos gets migrated to use
* cpufreq-cpu0 driver.
* cpufreq-dt driver.
*/
np = of_find_compatible_node(NULL, NULL, "samsung,exynos4210-clock");
if (!np) {

2
drivers/cpufreq/exynos4x12-cpufreq.c
View File

@ -174,7 +174,7 @@ int exynos4x12_cpufreq_init(struct exynos_dvfs_info *info)
* dependencies on platform headers. It is necessary to enable
* Exynos multi-platform support and will be removed together with
* this whole driver as soon as Exynos gets migrated to use
* cpufreq-cpu0 driver.
* cpufreq-dt driver.
*/
np = of_find_compatible_node(NULL, NULL, "samsung,exynos4412-clock");
if (!np) {

2
drivers/cpufreq/exynos5250-cpufreq.c
View File

@ -153,7 +153,7 @@ int exynos5250_cpufreq_init(struct exynos_dvfs_info *info)
* dependencies on platform headers. It is necessary to enable
* Exynos multi-platform support and will be removed together with
* this whole driver as soon as Exynos gets migrated to use
* cpufreq-cpu0 driver.
* cpufreq-dt driver.
*/
np = of_find_compatible_node(NULL, NULL, "samsung,exynos5250-clock");
if (!np) {

6
drivers/cpufreq/highbank-cpufreq.c
View File

@ -6,7 +6,7 @@
* published by the Free Software Foundation.
*
* This driver provides the clk notifier callbacks that are used when
* the cpufreq-cpu0 driver changes to frequency to alert the highbank
* the cpufreq-dt driver changes to frequency to alert the highbank
* EnergyCore Management Engine (ECME) about the need to change
* voltage. The ECME interfaces with the actual voltage regulators.
*/
@ -60,7 +60,7 @@ static struct notifier_block hb_cpufreq_clk_nb = {
static int hb_cpufreq_driver_init(void)
{
struct platform_device_info devinfo = { .name = "cpufreq-cpu0", };
struct platform_device_info devinfo = { .name = "cpufreq-dt", };
struct device *cpu_dev;
struct clk *cpu_clk;
struct device_node *np;
@ -95,7 +95,7 @@ static int hb_cpufreq_driver_init(void)
goto out_put_node;
}
/* Instantiate cpufreq-cpu0 */
/* Instantiate cpufreq-dt */
platform_device_register_full(&devinfo);
out_put_node:

2
drivers/cpufreq/s5pv210-cpufreq.c
View File

@ -597,7 +597,7 @@ static int s5pv210_cpufreq_probe(struct platform_device *pdev)
* and dependencies on platform headers. It is necessary to enable
* S5PV210 multi-platform support and will be removed together with
* this whole driver as soon as S5PV210 gets migrated to use
* cpufreq-cpu0 driver.
* cpufreq-dt driver.
*/
np = of_find_compatible_node(NULL, NULL, "samsung,s5pv210-clock");
if (!np) {