Subject: Re: [PATCH 1/3] powerpc clk.h interface for platforms

From: Domen Puncer <[email-masked]>
Date: Mon, 6 Aug 2007 08:58:58 +0200

Hi!

Paul, what do you say about this?
Sylvain suggested it could also be integrated with define_machine
interface.

If it's OK, it would be cool if it got merged in next release cycle.

	Domen

On 11/07/07 11:32 +0200, Domen Puncer wrote:
> clk interface for arch/powerpc, platforms should fill
> clk_functions.
> 
> Signed-off-by: Domen Puncer <[email-masked]>
> 
> ---
>  arch/powerpc/kernel/Makefile        |    3 -
>  arch/powerpc/kernel/clock.c         |   82 ++++++++++++++++++++++++++++++++++++
>  include/asm-powerpc/clk_interface.h |   20 ++++++++
>  3 files changed, 104 insertions(+), 1 deletion(-)
> 
> Index: work-powerpc.git/arch/powerpc/kernel/clock.c
> ===================================================================
> --- /dev/null
> +++ work-powerpc.git/arch/powerpc/kernel/clock.c
> @@ -0,0 +1,82 @@
> +/*
> + * Dummy clk implementations for powerpc.
> + * These need to be overridden in platform code.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/err.h>
> +#include <linux/errno.h>
> +#include <linux/module.h>
> +#include <asm/clk_interface.h>
> +
> +struct clk_interface clk_functions;
> +
> +struct clk *clk_get(struct device *dev, const char *id)
> +{
> +	if (clk_functions.clk_get)
> +		return clk_functions.clk_get(dev, id);
> +	return ERR_PTR(-ENOSYS);
> +}
> +EXPORT_SYMBOL(clk_get);
> +
> +void clk_put(struct clk *clk)
> +{
> +	if (clk_functions.clk_put)
> +		clk_functions.clk_put(clk);
> +}
> +EXPORT_SYMBOL(clk_put);
> +
> +int clk_enable(struct clk *clk)
> +{
> +	if (clk_functions.clk_enable)
> +		return clk_functions.clk_enable(clk);
> +	return -ENOSYS;
> +}
> +EXPORT_SYMBOL(clk_enable);
> +
> +void clk_disable(struct clk *clk)
> +{
> +	if (clk_functions.clk_disable)
> +		clk_functions.clk_disable(clk);
> +}
> +EXPORT_SYMBOL(clk_disable);
> +
> +unsigned long clk_get_rate(struct clk *clk)
> +{
> +	if (clk_functions.clk_get_rate)
> +		return clk_functions.clk_get_rate(clk);
> +	return 0;
> +}
> +EXPORT_SYMBOL(clk_get_rate);
> +
> +long clk_round_rate(struct clk *clk, unsigned long rate)
> +{
> +	if (clk_functions.clk_round_rate)
> +		return clk_functions.clk_round_rate(clk, rate);
> +	return -ENOSYS;
> +}
> +EXPORT_SYMBOL(clk_round_rate);
> +
> +int clk_set_rate(struct clk *clk, unsigned long rate)
> +{
> +	if (clk_functions.clk_set_rate)
> +		return clk_functions.clk_set_rate(clk, rate);
> +	return -ENOSYS;
> +}
> +EXPORT_SYMBOL(clk_set_rate);
> +
> +struct clk *clk_get_parent(struct clk *clk)
> +{
> +	if (clk_functions.clk_get_parent)
> +		return clk_functions.clk_get_parent(clk);
> +	return ERR_PTR(-ENOSYS);
> +}
> +EXPORT_SYMBOL(clk_get_parent);
> +
> +int clk_set_parent(struct clk *clk, struct clk *parent)
> +{
> +	if (clk_functions.clk_set_parent)
> +		return clk_functions.clk_set_parent(clk, parent);
> +	return -ENOSYS;
> +}
> +EXPORT_SYMBOL(clk_set_parent);
> Index: work-powerpc.git/include/asm-powerpc/clk_interface.h
> ===================================================================
> --- /dev/null
> +++ work-powerpc.git/include/asm-powerpc/clk_interface.h
> @@ -0,0 +1,20 @@
> +#ifndef __ASM_POWERPC_CLK_INTERFACE_H
> +#define __ASM_POWERPC_CLK_INTERFACE_H
> +
> +#include <linux/clk.h>
> +
> +struct clk_interface {
> +	struct clk*	(*clk_get)	(struct device *dev, const char *id);
> +	int		(*clk_enable)	(struct clk *clk);
> +	void		(*clk_disable)	(struct clk *clk);
> +	unsigned long	(*clk_get_rate)	(struct clk *clk);
> +	void		(*clk_put)	(struct clk *clk);
> +	long		(*clk_round_rate) (struct clk *clk, unsigned long rate);
> +	int 		(*clk_set_rate)	(struct clk *clk, unsigned long rate);
> +	int		(*clk_set_parent) (struct clk *clk, struct clk *parent);
> +	struct clk*	(*clk_get_parent) (struct clk *clk);
> +};
> +
> +extern struct clk_interface clk_functions;
> +
> +#endif /* __ASM_POWERPC_CLK_INTERFACE_H */
> Index: work-powerpc.git/arch/powerpc/kernel/Makefile
> ===================================================================
> --- work-powerpc.git.orig/arch/powerpc/kernel/Makefile
> +++ work-powerpc.git/arch/powerpc/kernel/Makefile
> @@ -12,7 +12,8 @@ endif
>  
>  obj-y				:= semaphore.o cputable.o ptrace.o syscalls.o \
>  				   irq.o align.o signal_32.o pmc.o vdso.o \
> -				   init_task.o process.o systbl.o idle.o
> +				   init_task.o process.o systbl.o idle.o \
> +				   clock.o
>  obj-y				+= vdso32/
>  obj-$(CONFIG_PPC64)		+= setup_64.o binfmt_elf32.o sys_ppc32.o \
>  				   signal_64.o ptrace32.o \
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