[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: Domen Puncer <domen.puncer@telargo.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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@ -663,3 +663,7 @@ config KEYS_COMPAT
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default y
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source "crypto/Kconfig"
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config PPC_CLOCK
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bool
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default n
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@ -24,6 +24,7 @@ obj-$(CONFIG_PPC64) += vdso64/
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obj-$(CONFIG_ALTIVEC) += vecemu.o vector.o
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obj-$(CONFIG_PPC_970_NAP) += idle_power4.o
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obj-$(CONFIG_PPC_OF) += of_device.o of_platform.o prom_parse.o
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obj-$(CONFIG_PPC_CLOCK) += clock.o
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procfs-$(CONFIG_PPC64) := proc_ppc64.o
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obj-$(CONFIG_PROC_FS) += $(procfs-y)
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rtaspci-$(CONFIG_PPC64)-$(CONFIG_PCI) := rtas_pci.o
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@ -0,0 +1,82 @@
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/*
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* Dummy clk implementations for powerpc.
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* These need to be overridden in platform code.
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*/
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <asm/clk_interface.h>
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struct clk_interface clk_functions;
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struct clk *clk_get(struct device *dev, const char *id)
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{
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if (clk_functions.clk_get)
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return clk_functions.clk_get(dev, id);
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return ERR_PTR(-ENOSYS);
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}
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EXPORT_SYMBOL(clk_get);
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void clk_put(struct clk *clk)
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{
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if (clk_functions.clk_put)
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clk_functions.clk_put(clk);
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}
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EXPORT_SYMBOL(clk_put);
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int clk_enable(struct clk *clk)
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{
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if (clk_functions.clk_enable)
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return clk_functions.clk_enable(clk);
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return -ENOSYS;
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}
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EXPORT_SYMBOL(clk_enable);
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void clk_disable(struct clk *clk)
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{
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if (clk_functions.clk_disable)
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clk_functions.clk_disable(clk);
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}
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EXPORT_SYMBOL(clk_disable);
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unsigned long clk_get_rate(struct clk *clk)
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{
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if (clk_functions.clk_get_rate)
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return clk_functions.clk_get_rate(clk);
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return 0;
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}
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EXPORT_SYMBOL(clk_get_rate);
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long clk_round_rate(struct clk *clk, unsigned long rate)
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{
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if (clk_functions.clk_round_rate)
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return clk_functions.clk_round_rate(clk, rate);
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return -ENOSYS;
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}
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EXPORT_SYMBOL(clk_round_rate);
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int clk_set_rate(struct clk *clk, unsigned long rate)
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{
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if (clk_functions.clk_set_rate)
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return clk_functions.clk_set_rate(clk, rate);
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return -ENOSYS;
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}
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EXPORT_SYMBOL(clk_set_rate);
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struct clk *clk_get_parent(struct clk *clk)
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{
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if (clk_functions.clk_get_parent)
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return clk_functions.clk_get_parent(clk);
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return ERR_PTR(-ENOSYS);
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}
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EXPORT_SYMBOL(clk_get_parent);
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int clk_set_parent(struct clk *clk, struct clk *parent)
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{
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if (clk_functions.clk_set_parent)
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return clk_functions.clk_set_parent(clk, parent);
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return -ENOSYS;
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}
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EXPORT_SYMBOL(clk_set_parent);
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@ -1,6 +1,7 @@
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config PPC_MPC52xx
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bool
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select FSL_SOC
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select PPC_CLOCK
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default n
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config PPC_MPC5200
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@ -0,0 +1,20 @@
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#ifndef __ASM_POWERPC_CLK_INTERFACE_H
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#define __ASM_POWERPC_CLK_INTERFACE_H
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#include <linux/clk.h>
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struct clk_interface {
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struct clk* (*clk_get) (struct device *dev, const char *id);
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int (*clk_enable) (struct clk *clk);
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void (*clk_disable) (struct clk *clk);
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unsigned long (*clk_get_rate) (struct clk *clk);
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void (*clk_put) (struct clk *clk);
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long (*clk_round_rate) (struct clk *clk, unsigned long rate);
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int (*clk_set_rate) (struct clk *clk, unsigned long rate);
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int (*clk_set_parent) (struct clk *clk, struct clk *parent);
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struct clk* (*clk_get_parent) (struct clk *clk);
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};
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extern struct clk_interface clk_functions;
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#endif /* __ASM_POWERPC_CLK_INTERFACE_H */
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