clk interface for arch/powerpc, platforms should fill
clk_functions.
Signed-off-by: Domen Puncer <[EMAIL PROTECTED]>
---
On 20/09/07 15:07 +1000, Paul Mackerras wrote:
> Domen Puncer writes:
>
> > 52xx
> > Reason for adding it to all was that EXPORT_SYMBOL's would clash if
> > one were to add clk support for another platform.
>
> What I meant was, why aren't you using a config symbol so that we
> don't build it on platforms that don't need any "clk" support at all?
Right, doh!
>
> Paul.
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(+)
Index: linux.git/arch/powerpc/kernel/clock.c
===================================================================
--- /dev/null
+++ linux.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: linux.git/include/asm-powerpc/clk_interface.h
===================================================================
--- /dev/null
+++ linux.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: linux.git/arch/powerpc/kernel/Makefile
===================================================================
--- linux.git.orig/arch/powerpc/kernel/Makefile
+++ linux.git/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
Index: linux.git/arch/powerpc/Kconfig
===================================================================
--- linux.git.orig/arch/powerpc/Kconfig
+++ linux.git/arch/powerpc/Kconfig
@@ -664,3 +664,7 @@ config KEYS_COMPAT
default y
source "crypto/Kconfig"
+
+config PPC_CLOCK
+ bool
+ default n
Index: linux.git/arch/powerpc/platforms/52xx/Kconfig
===================================================================
--- linux.git.orig/arch/powerpc/platforms/52xx/Kconfig
+++ linux.git/arch/powerpc/platforms/52xx/Kconfig
@@ -1,6 +1,7 @@
config PPC_MPC52xx
bool
select FSL_SOC
+ select PPC_CLOCK
default n
config PPC_MPC5200
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