hwmon:change sht15_reverse()

This change sht15_reverse() to be generic bitrev8().

Signed-off-by: yalin wang <yalin.wang2010@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/sht15.c b/drivers/hwmon/sht15.c
index 497a7f822a12c661aeaac71790ec3bd33f2cef54..a2fdbb7d20edcc92f9a1307f4f7105475b41e7ca 100644 (file)
--- a/drivers/hwmon/sht15.c
+++ b/drivers/hwmon/sht15.c
@@ -33,6 +33,7 @@
 #include <linux/regulator/consumer.h>
 #include <linux/slab.h>
 #include <linux/atomic.h>
+#include <linux/bitrev.h>
 
 /* Commands */
 #define SHT15_MEASURE_TEMP             0x03
@@ -172,19 +173,6 @@ struct sht15_data {
        atomic_t                        interrupt_handled;
 };
 
-/**
- * sht15_reverse() - reverse a byte
- * @byte:    byte to reverse.
- */
-static u8 sht15_reverse(u8 byte)
-{
-       u8 i, c;
-
-       for (c = 0, i = 0; i < 8; i++)
-               c |= (!!(byte & (1 << i))) << (7 - i);
-       return c;
-}
-
 /**
  * sht15_crc8() - compute crc8
  * @data:      sht15 specific data.
@@ -196,7 +184,7 @@ static u8 sht15_crc8(struct sht15_data *data,
                const u8 *value,
                int len)
 {
-       u8 crc = sht15_reverse(data->val_status & 0x0F);
+       u8 crc = bitrev8(data->val_status & 0x0F);
 
        while (len--) {
                crc = sht15_crc8_table[*value ^ crc];
@@ -477,7 +465,7 @@ static int sht15_update_status(struct sht15_data *data)
 
                if (data->checksumming) {
                        sht15_ack(data);
-                       dev_checksum = sht15_reverse(sht15_read_byte(data));
+                       dev_checksum = bitrev8(sht15_read_byte(data));
                        checksum_vals[0] = SHT15_READ_STATUS;
                        checksum_vals[1] = status;
                        data->checksum_ok = (sht15_crc8(data, checksum_vals, 2)
@@ -864,7 +852,7 @@ static void sht15_bh_read_data(struct work_struct *work_s)
                 */
                if (sht15_ack(data))
                        goto wakeup;
-               dev_checksum = sht15_reverse(sht15_read_byte(data));
+               dev_checksum = bitrev8(sht15_read_byte(data));
                checksum_vals[0] = (data->state == SHT15_READING_TEMP) ?
                        SHT15_MEASURE_TEMP : SHT15_MEASURE_RH;
                checksum_vals[1] = (u8) (val >> 8);