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hwmon: (fam15h_power) Add bit masking for tdp_limit

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Add bit masking to read ApmTdpLimit precisely

Signed-off-by: Gioh Kim <[email protected]>
Acked-by: Borislav Petkov <[email protected]>
Acked-by: Huang Rui <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
This commit is contained in:
Gioh Kim 2016-01-27 12:02:09 +01:00 • committed by Guenter Roeck
commit 60dee3ca27
1 changed files with 9 additions and 1 deletions
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10
drivers/hwmon/fam15h_power.c
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@ -90,7 +90,15 @@ static ssize_t show_power(struct device *dev,
pci_bus_read_config_dword(f4->bus, PCI_DEVFN(PCI_SLOT(f4->devfn), 5),
REG_TDP_LIMIT3, &val);
tdp_limit = val >> 16;
/*
* On Carrizo and later platforms, ApmTdpLimit bit field
* is extended to 16:31 from 16:28.
*/
if (boot_cpu_data.x86 == 0x15 && boot_cpu_data.x86_model >= 0x60)
tdp_limit = val >> 16;
else
tdp_limit = (val >> 16) & 0x1fff;
curr_pwr_watts = ((u64)(tdp_limit +
data->base_tdp)) << running_avg_range;
curr_pwr_watts -= running_avg_capture;