From fb5153d05a7dd42b9bb9855985dd9a99a09fbd80 Mon Sep 17 00:00:00 2001 From: "Gautham R. Shenoy" Date: Tue, 11 Mar 2014 17:01:19 +0530 Subject: [PATCH] powerpc: powernv: Implement ppc_md.get_proc_freq() Implement a method named pnv_get_proc_freq(unsigned int cpu) which returns the current clock rate on the 'cpu' in Hz to be reported in /proc/cpuinfo. This method uses the value reported by cpufreq when such a value is sane. Otherwise it falls back to old way of reporting the clockrate, i.e. ppc_proc_freq. Set the ppc_md.get_proc_freq() hook to pnv_get_proc_freq() on the PowerNV platform. Signed-off-by: Gautham R. Shenoy Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/platforms/powernv/setup.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c index 05d63aaeb147..865aab40ded7 100644 --- a/arch/powerpc/platforms/powernv/setup.c +++ b/arch/powerpc/platforms/powernv/setup.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include @@ -290,6 +291,25 @@ static int __init pnv_probe(void) return 1; } +/* + * Returns the cpu frequency for 'cpu' in Hz. This is used by + * /proc/cpuinfo + */ +unsigned long pnv_get_proc_freq(unsigned int cpu) +{ + unsigned long ret_freq; + + ret_freq = cpufreq_quick_get(cpu) * 1000ul; + + /* + * If the backend cpufreq driver does not exist, + * then fallback to old way of reporting the clockrate. + */ + if (!ret_freq) + ret_freq = ppc_proc_freq; + return ret_freq; +} + define_machine(powernv) { .name = "PowerNV", .probe = pnv_probe, @@ -297,6 +317,7 @@ define_machine(powernv) { .setup_arch = pnv_setup_arch, .init_IRQ = pnv_init_IRQ, .show_cpuinfo = pnv_show_cpuinfo, + .get_proc_freq = pnv_get_proc_freq, .progress = pnv_progress, .machine_shutdown = pnv_shutdown, .power_save = power7_idle, -- 2.30.2