From 33836ee98533fd27baa89dabca48f8d4e69dd438 Mon Sep 17 00:00:00 2001 From: yalin wang Date: Mon, 10 Aug 2015 22:41:43 +0800 Subject: hwmon:change sht15_reverse() This change sht15_reverse() to be generic bitrev8(). Signed-off-by: yalin wang Signed-off-by: Guenter Roeck --- drivers/hwmon/sht15.c | 20 ++++---------------- 1 file changed, 4 insertions(+), 16 deletions(-) (limited to 'drivers/hwmon/sht15.c') diff --git a/drivers/hwmon/sht15.c b/drivers/hwmon/sht15.c index 497a7f822a12..a2fdbb7d20ed 100644 --- a/drivers/hwmon/sht15.c +++ b/drivers/hwmon/sht15.c @@ -33,6 +33,7 @@ #include #include #include +#include /* 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); -- cgit v1.2.3-59-g8ed1b