Re: [PATCH v3 1/2] cpufreq: tegra: Call tegra_cpufreq_init() specifically in machine code

2013-12-17 Thread bilhuang 

On 12/17/2013 02:31 PM, Viresh Kumar wrote:

On 5 December 2013 13:14, Bill Huang  wrote:

Move the call from module_init to Tegra machine codes so it won't be
called in a multi-platform kernel running on non-Tegra SoCs.

Signed-off-by: Bill Huang 
---
  arch/arm/mach-tegra/tegra.c |2 ++
  drivers/cpufreq/tegra-cpufreq.c |   13 ++---
  include/linux/tegra-soc.h   |   11 ++-
  3 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index 7336817..14490ad 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -34,6 +34,7 @@
  #include 
  #include 
  #include 
+#include 

  #include 
  #include 
@@ -160,6 +161,7 @@ static void __init tegra_dt_init_late(void)
  {
 int i;

+   tegra_cpufreq_init();
 tegra_init_suspend();
 tegra_cpuidle_init();
 tegra_powergate_debugfs_init();
diff --git a/drivers/cpufreq/tegra-cpufreq.c b/drivers/cpufreq/tegra-cpufreq.c
index 63f0059..ae1c0f1 100644
--- a/drivers/cpufreq/tegra-cpufreq.c
+++ b/drivers/cpufreq/tegra-cpufreq.c
@@ -155,7 +155,7 @@ static struct cpufreq_driver tegra_cpufreq_driver = {
  #endif
  };


Remove module.h as well ??


-static int __init tegra_cpufreq_init(void)
+int __init tegra_cpufreq_init(void)
  {
 cpu_clk = clk_get_sys(NULL, "cclk");
 if (IS_ERR(cpu_clk))
@@ -177,17 +177,8 @@ static int __init tegra_cpufreq_init(void)

 return cpufreq_register_driver(_cpufreq_driver);
  }
-
-static void __exit tegra_cpufreq_exit(void)
-{
-cpufreq_unregister_driver(_cpufreq_driver);
-   clk_put(emc_clk);
-   clk_put(cpu_clk);
-}
-
+EXPORT_SYMBOL(tegra_cpufreq_init);

  MODULE_AUTHOR("Colin Cross ");
  MODULE_DESCRIPTION("cpufreq driver for Nvidia Tegra2");
  MODULE_LICENSE("GPL");


Remove these as well? As they don't have a meaning for Tegra
cpufreq driver which can't be compiled as module.

OK thanks.



-module_init(tegra_cpufreq_init);
-module_exit(tegra_cpufreq_exit);


Rest as what Stephen suggested.



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Re: [PATCH v3 1/2] cpufreq: tegra: Call tegra_cpufreq_init() specifically in machine code

2013-12-17 Thread bilhuang 

On 12/17/2013 02:31 PM, Viresh Kumar wrote:

On 5 December 2013 13:14, Bill Huang bilhu...@nvidia.com wrote:

Move the call from module_init to Tegra machine codes so it won't be
called in a multi-platform kernel running on non-Tegra SoCs.

Signed-off-by: Bill Huang bilhu...@nvidia.com
---
  arch/arm/mach-tegra/tegra.c |2 ++
  drivers/cpufreq/tegra-cpufreq.c |   13 ++---
  include/linux/tegra-soc.h   |   11 ++-
  3 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index 7336817..14490ad 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -34,6 +34,7 @@
  #include linux/usb/tegra_usb_phy.h
  #include linux/clk/tegra.h
  #include linux/irqchip.h
+#include linux/tegra-soc.h

  #include asm/hardware/cache-l2x0.h
  #include asm/mach-types.h
@@ -160,6 +161,7 @@ static void __init tegra_dt_init_late(void)
  {
 int i;

+   tegra_cpufreq_init();
 tegra_init_suspend();
 tegra_cpuidle_init();
 tegra_powergate_debugfs_init();
diff --git a/drivers/cpufreq/tegra-cpufreq.c b/drivers/cpufreq/tegra-cpufreq.c
index 63f0059..ae1c0f1 100644
--- a/drivers/cpufreq/tegra-cpufreq.c
+++ b/drivers/cpufreq/tegra-cpufreq.c
@@ -155,7 +155,7 @@ static struct cpufreq_driver tegra_cpufreq_driver = {
  #endif
  };


Remove module.h as well ??


-static int __init tegra_cpufreq_init(void)
+int __init tegra_cpufreq_init(void)
  {
 cpu_clk = clk_get_sys(NULL, cclk);
 if (IS_ERR(cpu_clk))
@@ -177,17 +177,8 @@ static int __init tegra_cpufreq_init(void)

 return cpufreq_register_driver(tegra_cpufreq_driver);
  }
-
-static void __exit tegra_cpufreq_exit(void)
-{
-cpufreq_unregister_driver(tegra_cpufreq_driver);
-   clk_put(emc_clk);
-   clk_put(cpu_clk);
-}
-
+EXPORT_SYMBOL(tegra_cpufreq_init);

  MODULE_AUTHOR(Colin Cross ccr...@android.com);
  MODULE_DESCRIPTION(cpufreq driver for Nvidia Tegra2);
  MODULE_LICENSE(GPL);


Remove these as well? As they don't have a meaning for Tegra
cpufreq driver which can't be compiled as module.

OK thanks.



-module_init(tegra_cpufreq_init);
-module_exit(tegra_cpufreq_exit);


Rest as what Stephen suggested.



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Re: [PATCH v3 1/2] cpufreq: tegra: Call tegra_cpufreq_init() specifically in machine code

2013-12-16 Thread Viresh Kumar 
On 5 December 2013 13:14, Bill Huang  wrote:
> Move the call from module_init to Tegra machine codes so it won't be
> called in a multi-platform kernel running on non-Tegra SoCs.
>
> Signed-off-by: Bill Huang 
> ---
>  arch/arm/mach-tegra/tegra.c |2 ++
>  drivers/cpufreq/tegra-cpufreq.c |   13 ++---
>  include/linux/tegra-soc.h   |   11 ++-
>  3 files changed, 14 insertions(+), 12 deletions(-)
>
> diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
> index 7336817..14490ad 100644
> --- a/arch/arm/mach-tegra/tegra.c
> +++ b/arch/arm/mach-tegra/tegra.c
> @@ -34,6 +34,7 @@
>  #include 
>  #include 
>  #include 
> +#include 
>
>  #include 
>  #include 
> @@ -160,6 +161,7 @@ static void __init tegra_dt_init_late(void)
>  {
> int i;
>
> +   tegra_cpufreq_init();
> tegra_init_suspend();
> tegra_cpuidle_init();
> tegra_powergate_debugfs_init();
> diff --git a/drivers/cpufreq/tegra-cpufreq.c b/drivers/cpufreq/tegra-cpufreq.c
> index 63f0059..ae1c0f1 100644
> --- a/drivers/cpufreq/tegra-cpufreq.c
> +++ b/drivers/cpufreq/tegra-cpufreq.c
> @@ -155,7 +155,7 @@ static struct cpufreq_driver tegra_cpufreq_driver = {
>  #endif
>  };

Remove module.h as well ??

> -static int __init tegra_cpufreq_init(void)
> +int __init tegra_cpufreq_init(void)
>  {
> cpu_clk = clk_get_sys(NULL, "cclk");
> if (IS_ERR(cpu_clk))
> @@ -177,17 +177,8 @@ static int __init tegra_cpufreq_init(void)
>
> return cpufreq_register_driver(_cpufreq_driver);
>  }
> -
> -static void __exit tegra_cpufreq_exit(void)
> -{
> -cpufreq_unregister_driver(_cpufreq_driver);
> -   clk_put(emc_clk);
> -   clk_put(cpu_clk);
> -}
> -
> +EXPORT_SYMBOL(tegra_cpufreq_init);
>
>  MODULE_AUTHOR("Colin Cross ");
>  MODULE_DESCRIPTION("cpufreq driver for Nvidia Tegra2");
>  MODULE_LICENSE("GPL");

Remove these as well? As they don't have a meaning for Tegra
cpufreq driver which can't be compiled as module.

> -module_init(tegra_cpufreq_init);
> -module_exit(tegra_cpufreq_exit);

Rest as what Stephen suggested.
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Re: [PATCH v3 1/2] cpufreq: tegra: Call tegra_cpufreq_init() specifically in machine code

2013-12-16 Thread Viresh Kumar 
On 5 December 2013 13:14, Bill Huang bilhu...@nvidia.com wrote:
 Move the call from module_init to Tegra machine codes so it won't be
 called in a multi-platform kernel running on non-Tegra SoCs.

 Signed-off-by: Bill Huang bilhu...@nvidia.com
 ---
  arch/arm/mach-tegra/tegra.c |2 ++
  drivers/cpufreq/tegra-cpufreq.c |   13 ++---
  include/linux/tegra-soc.h   |   11 ++-
  3 files changed, 14 insertions(+), 12 deletions(-)

 diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
 index 7336817..14490ad 100644
 --- a/arch/arm/mach-tegra/tegra.c
 +++ b/arch/arm/mach-tegra/tegra.c
 @@ -34,6 +34,7 @@
  #include linux/usb/tegra_usb_phy.h
  #include linux/clk/tegra.h
  #include linux/irqchip.h
 +#include linux/tegra-soc.h

  #include asm/hardware/cache-l2x0.h
  #include asm/mach-types.h
 @@ -160,6 +161,7 @@ static void __init tegra_dt_init_late(void)
  {
 int i;

 +   tegra_cpufreq_init();
 tegra_init_suspend();
 tegra_cpuidle_init();
 tegra_powergate_debugfs_init();
 diff --git a/drivers/cpufreq/tegra-cpufreq.c b/drivers/cpufreq/tegra-cpufreq.c
 index 63f0059..ae1c0f1 100644
 --- a/drivers/cpufreq/tegra-cpufreq.c
 +++ b/drivers/cpufreq/tegra-cpufreq.c
 @@ -155,7 +155,7 @@ static struct cpufreq_driver tegra_cpufreq_driver = {
  #endif
  };

Remove module.h as well ??

 -static int __init tegra_cpufreq_init(void)
 +int __init tegra_cpufreq_init(void)
  {
 cpu_clk = clk_get_sys(NULL, cclk);
 if (IS_ERR(cpu_clk))
 @@ -177,17 +177,8 @@ static int __init tegra_cpufreq_init(void)

 return cpufreq_register_driver(tegra_cpufreq_driver);
  }
 -
 -static void __exit tegra_cpufreq_exit(void)
 -{
 -cpufreq_unregister_driver(tegra_cpufreq_driver);
 -   clk_put(emc_clk);
 -   clk_put(cpu_clk);
 -}
 -
 +EXPORT_SYMBOL(tegra_cpufreq_init);

  MODULE_AUTHOR(Colin Cross ccr...@android.com);
  MODULE_DESCRIPTION(cpufreq driver for Nvidia Tegra2);
  MODULE_LICENSE(GPL);

Remove these as well? As they don't have a meaning for Tegra
cpufreq driver which can't be compiled as module.

 -module_init(tegra_cpufreq_init);
 -module_exit(tegra_cpufreq_exit);

Rest as what Stephen suggested.
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Re: [PATCH v3 1/2] cpufreq: tegra: Call tegra_cpufreq_init() specifically in machine code

2013-12-09 Thread bilhuang 

On 12/06/2013 06:54 AM, Stephen Warren wrote:

On 12/05/2013 12:44 AM, Bill Huang wrote:

Move the call from module_init to Tegra machine codes so it won't be
called in a multi-platform kernel running on non-Tegra SoCs.



diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h


It might be better to create  for the interface
to the cpufreq driver; tegra-soc.h is for the interface to core Tegra
code *from* other drivers.

Thanks, will do.



+#ifdef CONFIG_ARM_TEGRA_CPUFREQ
+int tegra_cpufreq_init(void);
+#else
+static inline int tegra_cpufreq_init(void)
+{
+   return -EINVAL;
+}
+#endif


Probably best to "return 0" from the !CONFIG_ARM_TEGRA_CPUFREQ case; the
whole point is to isolate callers from having to care whether
CONFIG_ARM_TEGRA_CPUFREQ is enabled, and making the function act like it
worked OK is part of that isolation.


OK thanks.
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Re: [PATCH v3 1/2] cpufreq: tegra: Call tegra_cpufreq_init() specifically in machine code

2013-12-09 Thread bilhuang 

On 12/06/2013 06:54 AM, Stephen Warren wrote:

On 12/05/2013 12:44 AM, Bill Huang wrote:

Move the call from module_init to Tegra machine codes so it won't be
called in a multi-platform kernel running on non-Tegra SoCs.



diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h


It might be better to create linux/tegra-cpufreq.h for the interface
to the cpufreq driver; tegra-soc.h is for the interface to core Tegra
code *from* other drivers.

Thanks, will do.



+#ifdef CONFIG_ARM_TEGRA_CPUFREQ
+int tegra_cpufreq_init(void);
+#else
+static inline int tegra_cpufreq_init(void)
+{
+   return -EINVAL;
+}
+#endif


Probably best to return 0 from the !CONFIG_ARM_TEGRA_CPUFREQ case; the
whole point is to isolate callers from having to care whether
CONFIG_ARM_TEGRA_CPUFREQ is enabled, and making the function act like it
worked OK is part of that isolation.


OK thanks.
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Re: [PATCH v3 1/2] cpufreq: tegra: Call tegra_cpufreq_init() specifically in machine code

2013-12-05 Thread Stephen Warren 
On 12/05/2013 12:44 AM, Bill Huang wrote:
> Move the call from module_init to Tegra machine codes so it won't be
> called in a multi-platform kernel running on non-Tegra SoCs.

> diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h

It might be better to create  for the interface
to the cpufreq driver; tegra-soc.h is for the interface to core Tegra
code *from* other drivers.

> +#ifdef CONFIG_ARM_TEGRA_CPUFREQ
> +int tegra_cpufreq_init(void);
> +#else
> +static inline int tegra_cpufreq_init(void)
> +{
> + return -EINVAL;
> +}
> +#endif

Probably best to "return 0" from the !CONFIG_ARM_TEGRA_CPUFREQ case; the
whole point is to isolate callers from having to care whether
CONFIG_ARM_TEGRA_CPUFREQ is enabled, and making the function act like it
worked OK is part of that isolation.
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Re: [PATCH v3 1/2] cpufreq: tegra: Call tegra_cpufreq_init() specifically in machine code

2013-12-05 Thread Stephen Warren 
On 12/05/2013 12:44 AM, Bill Huang wrote:
 Move the call from module_init to Tegra machine codes so it won't be
 called in a multi-platform kernel running on non-Tegra SoCs.

 diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h

It might be better to create linux/tegra-cpufreq.h for the interface
to the cpufreq driver; tegra-soc.h is for the interface to core Tegra
code *from* other drivers.

 +#ifdef CONFIG_ARM_TEGRA_CPUFREQ
 +int tegra_cpufreq_init(void);
 +#else
 +static inline int tegra_cpufreq_init(void)
 +{
 + return -EINVAL;
 +}
 +#endif

Probably best to return 0 from the !CONFIG_ARM_TEGRA_CPUFREQ case; the
whole point is to isolate callers from having to care whether
CONFIG_ARM_TEGRA_CPUFREQ is enabled, and making the function act like it
worked OK is part of that isolation.
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[PATCH v3 1/2] cpufreq: tegra: Call tegra_cpufreq_init() specifically in machine code

2013-12-04 Thread Bill Huang 
Move the call from module_init to Tegra machine codes so it won't be
called in a multi-platform kernel running on non-Tegra SoCs.

Signed-off-by: Bill Huang 
---
 arch/arm/mach-tegra/tegra.c |2 ++
 drivers/cpufreq/tegra-cpufreq.c |   13 ++---
 include/linux/tegra-soc.h   |   11 ++-
 3 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index 7336817..14490ad 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -34,6 +34,7 @@
 #include 
 #include 
 #include 
+#include 
 
 #include 
 #include 
@@ -160,6 +161,7 @@ static void __init tegra_dt_init_late(void)
 {
int i;
 
+   tegra_cpufreq_init();
tegra_init_suspend();
tegra_cpuidle_init();
tegra_powergate_debugfs_init();
diff --git a/drivers/cpufreq/tegra-cpufreq.c b/drivers/cpufreq/tegra-cpufreq.c
index 63f0059..ae1c0f1 100644
--- a/drivers/cpufreq/tegra-cpufreq.c
+++ b/drivers/cpufreq/tegra-cpufreq.c
@@ -155,7 +155,7 @@ static struct cpufreq_driver tegra_cpufreq_driver = {
 #endif
 };
 
-static int __init tegra_cpufreq_init(void)
+int __init tegra_cpufreq_init(void)
 {
cpu_clk = clk_get_sys(NULL, "cclk");
if (IS_ERR(cpu_clk))
@@ -177,17 +177,8 @@ static int __init tegra_cpufreq_init(void)
 
return cpufreq_register_driver(_cpufreq_driver);
 }
-
-static void __exit tegra_cpufreq_exit(void)
-{
-cpufreq_unregister_driver(_cpufreq_driver);
-   clk_put(emc_clk);
-   clk_put(cpu_clk);
-}
-
+EXPORT_SYMBOL(tegra_cpufreq_init);
 
 MODULE_AUTHOR("Colin Cross ");
 MODULE_DESCRIPTION("cpufreq driver for Nvidia Tegra2");
 MODULE_LICENSE("GPL");
-module_init(tegra_cpufreq_init);
-module_exit(tegra_cpufreq_exit);
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index 95f611d..a179aa5 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2012,2013, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -17,6 +17,15 @@
 #ifndef __LINUX_TEGRA_SOC_H_
 #define __LINUX_TEGRA_SOC_H_
 
+#ifdef CONFIG_ARM_TEGRA_CPUFREQ
+int tegra_cpufreq_init(void);
+#else
+static inline int tegra_cpufreq_init(void)
+{
+   return -EINVAL;
+}
+#endif
+
 u32 tegra_read_chipid(void);
 
 #endif /* __LINUX_TEGRA_SOC_H_ */
-- 
1.7.9.5

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[PATCH v3 1/2] cpufreq: tegra: Call tegra_cpufreq_init() specifically in machine code

2013-12-04 Thread Bill Huang 
Move the call from module_init to Tegra machine codes so it won't be
called in a multi-platform kernel running on non-Tegra SoCs.

Signed-off-by: Bill Huang bilhu...@nvidia.com
---
 arch/arm/mach-tegra/tegra.c |2 ++
 drivers/cpufreq/tegra-cpufreq.c |   13 ++---
 include/linux/tegra-soc.h   |   11 ++-
 3 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index 7336817..14490ad 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -34,6 +34,7 @@
 #include linux/usb/tegra_usb_phy.h
 #include linux/clk/tegra.h
 #include linux/irqchip.h
+#include linux/tegra-soc.h
 
 #include asm/hardware/cache-l2x0.h
 #include asm/mach-types.h
@@ -160,6 +161,7 @@ static void __init tegra_dt_init_late(void)
 {
int i;
 
+   tegra_cpufreq_init();
tegra_init_suspend();
tegra_cpuidle_init();
tegra_powergate_debugfs_init();
diff --git a/drivers/cpufreq/tegra-cpufreq.c b/drivers/cpufreq/tegra-cpufreq.c
index 63f0059..ae1c0f1 100644
--- a/drivers/cpufreq/tegra-cpufreq.c
+++ b/drivers/cpufreq/tegra-cpufreq.c
@@ -155,7 +155,7 @@ static struct cpufreq_driver tegra_cpufreq_driver = {
 #endif
 };
 
-static int __init tegra_cpufreq_init(void)
+int __init tegra_cpufreq_init(void)
 {
cpu_clk = clk_get_sys(NULL, cclk);
if (IS_ERR(cpu_clk))
@@ -177,17 +177,8 @@ static int __init tegra_cpufreq_init(void)
 
return cpufreq_register_driver(tegra_cpufreq_driver);
 }
-
-static void __exit tegra_cpufreq_exit(void)
-{
-cpufreq_unregister_driver(tegra_cpufreq_driver);
-   clk_put(emc_clk);
-   clk_put(cpu_clk);
-}
-
+EXPORT_SYMBOL(tegra_cpufreq_init);
 
 MODULE_AUTHOR(Colin Cross ccr...@android.com);
 MODULE_DESCRIPTION(cpufreq driver for Nvidia Tegra2);
 MODULE_LICENSE(GPL);
-module_init(tegra_cpufreq_init);
-module_exit(tegra_cpufreq_exit);
diff --git a/include/linux/tegra-soc.h b/include/linux/tegra-soc.h
index 95f611d..a179aa5 100644
--- a/include/linux/tegra-soc.h
+++ b/include/linux/tegra-soc.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2012,2013, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -17,6 +17,15 @@
 #ifndef __LINUX_TEGRA_SOC_H_
 #define __LINUX_TEGRA_SOC_H_
 
+#ifdef CONFIG_ARM_TEGRA_CPUFREQ
+int tegra_cpufreq_init(void);
+#else
+static inline int tegra_cpufreq_init(void)
+{
+   return -EINVAL;
+}
+#endif
+
 u32 tegra_read_chipid(void);
 
 #endif /* __LINUX_TEGRA_SOC_H_ */
-- 
1.7.9.5

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