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[POWERPC] cbe_thermal: clean up computation of temperature 

This patch introduces a little function for transforming
register values into temperature.

Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
This commit is contained in:
Christian Krafft 2007-04-23 21:35:40 +02:00 committed by Arnd Bergmann
parent 91a69c9646
commit 24d560d7b9
1 changed files with 9 additions and 17 deletions
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26
arch/powerpc/platforms/cell/cbe_thermal.c
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@ -31,6 +31,11 @@
#include "cbe_regs.h"
#include "spu_priv1_mmio.h"
static inline u8 reg_to_temp(u8 reg_value)
{
return ((reg_value & 0x3f) << 1) + 65;
}
static struct cbe_pmd_regs __iomem *get_pmd_regs(struct sys_device *sysdev)
{
struct spu *spu;
@ -58,20 +63,14 @@ static u8 spu_read_register_value(struct sys_device *sysdev, union spe_reg __iom
static ssize_t spu_show_temp(struct sys_device *sysdev, char *buf)
{
int value;
u8 value;
struct cbe_pmd_regs __iomem *pmd_regs;
pmd_regs = get_pmd_regs(sysdev);
value = spu_read_register_value(sysdev, &pmd_regs->ts_ctsr1);
/* clear all other bits */
value &= 0x3F;
/* temp is stored in steps of 2 degrees */
value *= 2;
/* base temp is 65 degrees */
value += 65;
return sprintf(buf, "%d\n", (int) value);
return sprintf(buf, "%d\n", reg_to_temp(value));
}
static ssize_t ppe_show_temp(struct sys_device *sysdev, char *buf, int pos)
@ -82,16 +81,9 @@ static ssize_t ppe_show_temp(struct sys_device *sysdev, char *buf, int pos)
pmd_regs = cbe_get_cpu_pmd_regs(sysdev->id);
value = in_be64(&pmd_regs->ts_ctsr2);
/* access the corresponding byte */
value >>= pos;
/* clear all other bits */
value &= 0x3F;
/* temp is stored in steps of 2 degrees */
value *= 2;
/* base temp is 65 degrees */
value += 65;
value = (value >> pos) & 0x3f;
return sprintf(buf, "%d\n", (int) value);
return sprintf(buf, "%d\n", reg_to_temp(value));
}