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

[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
......@@ -663,3 +663,7 @@ config KEYS_COMPAT
default y
source "crypto/Kconfig"
config PPC_CLOCK
bool
default n
......@@ -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
......
/*
* 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);
config PPC_MPC52xx
bool
select FSL_SOC
select PPC_CLOCK
default n
config PPC_MPC5200
......
#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 */
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