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authorChristian Krafft <krafft@de.ibm.com>2007-04-23 21:35:40 +0200
committerArnd Bergmann <arnd@klappe.arndb.de>2007-04-23 21:44:39 +0200
commit24d560d7b9cf90451c6ef6248c09fb4cee1c76e6 (patch)
tree72ce3dac5fb300f6ef539170f260bc30c3de5503 /arch/powerpc/platforms
parent91a69c9646a5b709381d99a171890e77377b1b9c (diff)
[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>
Diffstat (limited to 'arch/powerpc/platforms')
-rw-r--r--arch/powerpc/platforms/cell/cbe_thermal.c28
1 files changed, 10 insertions, 18 deletions
diff --git a/arch/powerpc/platforms/cell/cbe_thermal.c b/arch/powerpc/platforms/cell/cbe_thermal.c
index e8bcd2a767c..0d486fd424a 100644
--- a/arch/powerpc/platforms/cell/cbe_thermal.c
+++ b/arch/powerpc/platforms/cell/cbe_thermal.c
@@ -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));
}