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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>
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cfca3789e0
commit
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1 changed files with 4 additions and 16 deletions
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@ -33,6 +33,7 @@
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#include <linux/regulator/consumer.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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#include <linux/slab.h>
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#include <linux/atomic.h>
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#include <linux/atomic.h>
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#include <linux/bitrev.h>
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/* Commands */
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/* Commands */
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#define SHT15_MEASURE_TEMP 0x03
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#define SHT15_MEASURE_TEMP 0x03
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@ -172,19 +173,6 @@ struct sht15_data {
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atomic_t interrupt_handled;
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atomic_t interrupt_handled;
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};
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};
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/**
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* sht15_reverse() - reverse a byte
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* @byte: byte to reverse.
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*/
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static u8 sht15_reverse(u8 byte)
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{
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u8 i, c;
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for (c = 0, i = 0; i < 8; i++)
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c |= (!!(byte & (1 << i))) << (7 - i);
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return c;
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}
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/**
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/**
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* sht15_crc8() - compute crc8
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* sht15_crc8() - compute crc8
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* @data: sht15 specific data.
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* @data: sht15 specific data.
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@ -196,7 +184,7 @@ static u8 sht15_crc8(struct sht15_data *data,
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const u8 *value,
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const u8 *value,
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int len)
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int len)
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{
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{
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u8 crc = sht15_reverse(data->val_status & 0x0F);
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u8 crc = bitrev8(data->val_status & 0x0F);
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while (len--) {
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while (len--) {
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crc = sht15_crc8_table[*value ^ crc];
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crc = sht15_crc8_table[*value ^ crc];
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@ -477,7 +465,7 @@ static int sht15_update_status(struct sht15_data *data)
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if (data->checksumming) {
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if (data->checksumming) {
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sht15_ack(data);
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sht15_ack(data);
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dev_checksum = sht15_reverse(sht15_read_byte(data));
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dev_checksum = bitrev8(sht15_read_byte(data));
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checksum_vals[0] = SHT15_READ_STATUS;
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checksum_vals[0] = SHT15_READ_STATUS;
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checksum_vals[1] = status;
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checksum_vals[1] = status;
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data->checksum_ok = (sht15_crc8(data, checksum_vals, 2)
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data->checksum_ok = (sht15_crc8(data, checksum_vals, 2)
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@ -864,7 +852,7 @@ static void sht15_bh_read_data(struct work_struct *work_s)
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*/
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*/
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if (sht15_ack(data))
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if (sht15_ack(data))
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goto wakeup;
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goto wakeup;
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dev_checksum = sht15_reverse(sht15_read_byte(data));
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dev_checksum = bitrev8(sht15_read_byte(data));
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checksum_vals[0] = (data->state == SHT15_READING_TEMP) ?
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checksum_vals[0] = (data->state == SHT15_READING_TEMP) ?
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SHT15_MEASURE_TEMP : SHT15_MEASURE_RH;
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SHT15_MEASURE_TEMP : SHT15_MEASURE_RH;
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checksum_vals[1] = (u8) (val >> 8);
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checksum_vals[1] = (u8) (val >> 8);
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