diff options
Diffstat (limited to 'drivers/hwmon/k8temp.c')
| -rw-r--r-- | drivers/hwmon/k8temp.c | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/drivers/hwmon/k8temp.c b/drivers/hwmon/k8temp.c index bd2bde0ef95e..ca56f2e26fd1 100644 --- a/drivers/hwmon/k8temp.c +++ b/drivers/hwmon/k8temp.c @@ -31,6 +31,7 @@ #include <linux/hwmon-sysfs.h> #include <linux/err.h> #include <linux/mutex.h> +#include <asm/processor.h> #define TEMP_FROM_REG(val) (((((val) >> 16) & 0xff) - 49) * 1000) #define REG_TEMP 0xe4 @@ -141,20 +142,34 @@ static int __devinit k8temp_probe(struct pci_dev *pdev, int err; u8 scfg; u32 temp; + u8 model, stepping; struct k8temp_data *data; - u32 cpuid = cpuid_eax(1); - - /* this feature should be available since SH-C0 core */ - if ((cpuid == 0xf40) || (cpuid == 0xf50) || (cpuid == 0xf51)) { - err = -ENODEV; - goto exit; - } if (!(data = kzalloc(sizeof(struct k8temp_data), GFP_KERNEL))) { err = -ENOMEM; goto exit; } + model = boot_cpu_data.x86_model; + stepping = boot_cpu_data.x86_mask; + + switch (boot_cpu_data.x86) { + case 0xf: + /* feature available since SH-C0, exclude older revisions */ + if (((model == 4) && (stepping == 0)) || + ((model == 5) && (stepping <= 1))) { + err = -ENODEV; + goto exit_free; + } + + if (model >= 0x40) { + dev_warn(&pdev->dev, "Temperature readouts might be " + "wrong - check erratum #141\n"); + } + + break; + } + pci_read_config_byte(pdev, REG_TEMP, &scfg); scfg &= ~(SEL_PLACE | SEL_CORE); /* Select sensor 0, core0 */ pci_write_config_byte(pdev, REG_TEMP, scfg); |