From 87c441e54dfcf9f45593ecaf68e7e18ea53d5e13 Mon Sep 17 00:00:00 2001 From: Wolfgang Denk Date: Wed, 17 Jun 2009 00:30:22 -0600 Subject: powerpc/5xxx: Add common mpc5xxx_get_bus_frequency() function So far, MPC512x used mpc512x_find_ips_freq() to get the bus frequency, while MPC52xx used mpc52xx_find_ipb_freq(). Despite the different clock names (IPS vs. IPB) the code was identical. Use common code for both processor families. Signed-off-by: Wolfgang Denk Signed-off-by: Grant Likely --- arch/powerpc/sysdev/Makefile | 3 +++ arch/powerpc/sysdev/mpc5xxx_clocks.c | 33 +++++++++++++++++++++++++++++++++ 2 files changed, 36 insertions(+) create mode 100644 arch/powerpc/sysdev/mpc5xxx_clocks.c (limited to 'arch/powerpc/sysdev') diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile index d073bfd..9d4b174 100644 --- a/arch/powerpc/sysdev/Makefile +++ b/arch/powerpc/sysdev/Makefile @@ -50,6 +50,9 @@ obj-$(CONFIG_PPC_DCR) += dcr.o obj-$(CONFIG_8xx) += mpc8xx_pic.o cpm1.o obj-$(CONFIG_UCODE_PATCH) += micropatch.o +obj-$(CONFIG_PPC_MPC512x) += mpc5xxx_clocks.o +obj-$(CONFIG_PPC_MPC52xx) += mpc5xxx_clocks.o + ifeq ($(CONFIG_SUSPEND),y) obj-$(CONFIG_6xx) += 6xx-suspend.o endif diff --git a/arch/powerpc/sysdev/mpc5xxx_clocks.c b/arch/powerpc/sysdev/mpc5xxx_clocks.c new file mode 100644 index 0000000..34e12f9 --- /dev/null +++ b/arch/powerpc/sysdev/mpc5xxx_clocks.c @@ -0,0 +1,33 @@ +/** + * mpc5xxx_get_bus_frequency - Find the bus frequency for a device + * @node: device node + * + * Returns bus frequency (IPS on MPC512x, IPB on MPC52xx), + * or 0 if the bus frequency cannot be found. + */ + +#include +#include + +unsigned int +mpc5xxx_get_bus_frequency(struct device_node *node) +{ + struct device_node *np; + const unsigned int *p_bus_freq = NULL; + + of_node_get(node); + while (node) { + p_bus_freq = of_get_property(node, "bus-frequency", NULL); + if (p_bus_freq) + break; + + np = of_get_parent(node); + of_node_put(node); + node = np; + } + if (node) + of_node_put(node); + + return p_bus_freq ? *p_bus_freq : 0; +} +EXPORT_SYMBOL(mpc5xxx_get_bus_frequency); -- cgit v1.1