From 6f6682809b994fd9a61081fa0410df31481d5f7f Mon Sep 17 00:00:00 2001 From: Domen Puncer Date: Fri, 21 Sep 2007 00:00:11 +1000 Subject: [PATCH] [POWERPC] clk.h interface for platforms This provides an implementation of the 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 Signed-off-by: Paul Mackerras --- arch/powerpc/Kconfig | 4 ++ arch/powerpc/kernel/Makefile | 1 + arch/powerpc/kernel/clock.c | 82 +++++++++++++++++++++++++++++ arch/powerpc/platforms/52xx/Kconfig | 1 + include/asm-powerpc/clk_interface.h | 20 +++++++ 5 files changed, 108 insertions(+) create mode 100644 arch/powerpc/kernel/clock.c create mode 100644 include/asm-powerpc/clk_interface.h diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 66a329534b5e..26126d27d756 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -663,3 +663,7 @@ config KEYS_COMPAT default y source "crypto/Kconfig" + +config PPC_CLOCK + bool + default n diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index 967afc517d8f..b37165effb65 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -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 diff --git a/arch/powerpc/kernel/clock.c b/arch/powerpc/kernel/clock.c new file mode 100644 index 000000000000..ce668f545758 --- /dev/null +++ b/arch/powerpc/kernel/clock.c @@ -0,0 +1,82 @@ +/* + * Dummy clk implementations for powerpc. + * These need to be overridden in platform code. + */ + +#include +#include +#include +#include +#include + +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); diff --git a/arch/powerpc/platforms/52xx/Kconfig b/arch/powerpc/platforms/52xx/Kconfig index 9ddf251b192b..2938d4927b83 100644 --- a/arch/powerpc/platforms/52xx/Kconfig +++ b/arch/powerpc/platforms/52xx/Kconfig @@ -1,6 +1,7 @@ config PPC_MPC52xx bool select FSL_SOC + select PPC_CLOCK default n config PPC_MPC5200 diff --git a/include/asm-powerpc/clk_interface.h b/include/asm-powerpc/clk_interface.h new file mode 100644 index 000000000000..ab1882c1e176 --- /dev/null +++ b/include/asm-powerpc/clk_interface.h @@ -0,0 +1,20 @@ +#ifndef __ASM_POWERPC_CLK_INTERFACE_H +#define __ASM_POWERPC_CLK_INTERFACE_H + +#include + +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 */ -- 2.30.2