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Commit 6f668280 authored by Domen Puncer's avatar Domen Puncer Committed by Paul Mackerras
Browse files

[POWERPC] clk.h interface for platforms 



This provides an implementation of the <linux/clk.h> interface for
arch/powerpc using a set of function pointers in clk_functions.
Platforms that want to support this interface should fill
clk_functions and select CONFIG_PPC_CLOCK in Kconfig.

Signed-off-by: default avatarDomen Puncer <domen.puncer@telargo.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 21ccdd31

arch/powerpc/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -663,3 +663,7 @@ config KEYS_COMPAT 
	default y



source "crypto/Kconfig"



config PPC_CLOCK

	bool

	default n

arch/powerpc/kernel/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ obj-$(CONFIG_PPC64) += vdso64/ 
obj-$(CONFIG_ALTIVEC)		+= vecemu.o vector.o

obj-$(CONFIG_PPC_970_NAP)	+= idle_power4.o

obj-$(CONFIG_PPC_OF)		+= of_device.o of_platform.o prom_parse.o

obj-$(CONFIG_PPC_CLOCK)		+= clock.o

procfs-$(CONFIG_PPC64)		:= proc_ppc64.o

obj-$(CONFIG_PROC_FS)		+= $(procfs-y)

rtaspci-$(CONFIG_PPC64)-$(CONFIG_PCI)	:= rtas_pci.o

arch/powerpc/kernel/clock.c

0 → 100644
+82 −0
Original line number Diff line number Diff line 
/*

 * 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);

arch/powerpc/platforms/52xx/Kconfig

+1 −0
Original line number Diff line number Diff line 
config PPC_MPC52xx

	bool

	select FSL_SOC

	select PPC_CLOCK

	default n



config PPC_MPC5200

include/asm-powerpc/clk_interface.h

0 → 100644
+20 −0
Original line number Diff line number Diff line 
#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 */