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powernow-k6: reorder frequencies 

commit 22c73795b101597051924556dce019385a1e2fa0 upstream.

This patch reorders reported frequencies from the highest to the lowest,
just like in other frequency drivers.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mikulas Patocka 2013-12-11 19:39:19 -05:00 committed by Greg Kroah-Hartman
parent 59b61f4dd5
commit 45deaa3ba8
1 changed files with 11 additions and 8 deletions
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19
drivers/cpufreq/powernow-k6.c
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@ -37,17 +37,20 @@ MODULE_PARM_DESC(bus_frequency, "Bus frequency in kHz");
/* Clock ratio multiplied by 10 - see table 27 in AMD#23446 */
static struct cpufreq_frequency_table clock_ratio[] = {
{45, /* 000 -> 4.5x */ 0},
{50, /* 001 -> 5.0x */ 0},
{40, /* 010 -> 4.0x */ 0},
{55, /* 011 -> 5.5x */ 0},
{20, /* 100 -> 2.0x */ 0},
{30, /* 101 -> 3.0x */ 0},
{60, /* 110 -> 6.0x */ 0},
{55, /* 011 -> 5.5x */ 0},
{50, /* 001 -> 5.0x */ 0},
{45, /* 000 -> 4.5x */ 0},
{40, /* 010 -> 4.0x */ 0},
{35, /* 111 -> 3.5x */ 0},
{30, /* 101 -> 3.0x */ 0},
{20, /* 100 -> 2.0x */ 0},
{0, CPUFREQ_TABLE_END}
};
static const u8 index_to_register[8] = { 6, 3, 1, 0, 2, 7, 5, 4 };
static const u8 register_to_index[8] = { 3, 2, 4, 1, 7, 6, 0, 5 };
static const struct {
unsigned freq;
unsigned mult;
@ -91,7 +94,7 @@ static int powernow_k6_get_cpu_multiplier(void)
local_irq_enable();
return clock_ratio[(invalue >> 5)&7].index;
return clock_ratio[register_to_index[(invalue >> 5)&7]].index;
}
static void powernow_k6_set_cpu_multiplier(unsigned int best_i)
@ -111,7 +114,7 @@ static void powernow_k6_set_cpu_multiplier(unsigned int best_i)
write_cr0(cr0 | X86_CR0_CD);
wbinvd();
outvalue = (1<<12) | (1<<10) | (1<<9) | (best_i<<5);
outvalue = (1<<12) | (1<<10) | (1<<9) | (index_to_register[best_i]<<5);
msrval = POWERNOW_IOPORT + 0x1;
wrmsr(MSR_K6_EPMR, msrval, 0); /* enable the PowerNow port */