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drivers/mtd/at24xx.c: Appease nxstyle

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YAMAMOTO Takashi 2020-11-30 12:49:08 +09:00 committed by Xiang Xiao
parent aa294546f4
commit 99f545f5c3
1 changed files with 25 additions and 19 deletions
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44
drivers/mtd/at24xx.c
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@ -197,13 +197,13 @@ static struct at24c_dev_s g_at24c;
* Private Functions
************************************************************************************/
/****************************************************************************
/************************************************************************************
* Name: at24c_i2c_write
*
* Description:
* Write to the I2C device.
*
****************************************************************************/
************************************************************************************/
static int at24c_i2c_write(FAR struct at24c_dev_s *priv, uint16_t at24addr,
FAR const uint8_t *buffer, int buflen)
@ -223,13 +223,13 @@ static int at24c_i2c_write(FAR struct at24c_dev_s *priv, uint16_t at24addr,
return I2C_TRANSFER(priv->dev, &msg, 1);
}
/****************************************************************************
/************************************************************************************
* Name: at24c_i2c_read
*
* Description:
* Read from the I2C device.
*
****************************************************************************/
************************************************************************************/
static int at24c_i2c_read(FAR struct at24c_dev_s *priv, uint16_t at24addr,
FAR uint8_t *buffer, int buflen)
@ -319,17 +319,20 @@ static ssize_t at24c_read_internal(FAR struct at24c_dev_s *priv, off_t offset,
finfo("offset: %lu nbytes: %lu address: %02x\n",
(unsigned long)offset, (unsigned long)nbytes, address);
/* "Random Read: A Random Read requires a dummy byte write sequence to load in the
* data word address. Once the device address word and data word address are clocked
* in and acknowledged by the EEPROM, the microcontroller must generate another
* Start condition. The microcontroller now initiates a current address read
* by sending a device address with the read/write select bit high. The EEPROM
* acknowledges the device address and serially clocks out the data word. To end the
* random read sequence, the microcontroller does not respond with a zero but does
* generate a Stop condition in the subsequent clock cycle."
/* "Random Read: A Random Read requires a dummy byte write sequence to
* load in the data word address. Once the device address word and data
* word address are clocked in and acknowledged by the EEPROM, the
* microcontroller must generate another Start condition. The
* microcontroller now initiates a current address read by sending a
* device address with the read/write select bit high. The EEPROM
* acknowledges the device address and serially clocks out the data word.
* To end the random read sequence, the microcontroller does not respond
* with a zero but does generate a Stop condition in the subsequent clock
* cycle."
*
* A repeated START after the address is suggested, however, this simple driver
* just performs the write as a sepate transfer with an additional, unnecessary STOP.
* A repeated START after the address is suggested, however, this simple
* driver just performs the write as a sepate transfer with an additional,
* unnecessary STOP.
*/
#if AT24XX_ADDRSIZE == 2
@ -411,9 +414,9 @@ static ssize_t at24c_bread(FAR struct mtd_dev_s *dev, off_t startblock,
}
#if CONFIG_AT24XX_MTD_BLOCKSIZE > AT24XX_PAGESIZE
return nblocks / (CONFIG_AT24XX_MTD_BLOCKSIZE / AT24XX_PAGESIZE);
return nblocks / (CONFIG_AT24XX_MTD_BLOCKSIZE / AT24XX_PAGESIZE);
#else
return nblocks;
return nblocks;
#endif
}
@ -424,7 +427,8 @@ static ssize_t at24c_bread(FAR struct mtd_dev_s *dev, off_t startblock,
*
************************************************************************************/
static ssize_t at24c_bwrite(FAR struct mtd_dev_s *dev, off_t startblock, size_t nblocks,
static ssize_t at24c_bwrite(FAR struct mtd_dev_s *dev, off_t startblock,
size_t nblocks,
FAR const uint8_t *buffer)
{
FAR struct at24c_dev_s *priv = (FAR struct at24c_dev_s *)dev;
@ -553,7 +557,8 @@ static int at24c_ioctl(FAR struct mtd_dev_s *dev, int cmd, unsigned long arg)
{
case MTDIOC_GEOMETRY:
{
FAR struct mtd_geometry_s *geo = (FAR struct mtd_geometry_s *)((uintptr_t)arg);
FAR struct mtd_geometry_s *geo = (FAR struct mtd_geometry_s *)
((uintptr_t)arg);
if (geo)
{
/* Populate the geometry structure with information need to know
@ -580,7 +585,8 @@ static int at24c_ioctl(FAR struct mtd_dev_s *dev, int cmd, unsigned long arg)
#if CONFIG_AT24XX_MTD_BLOCKSIZE > AT24XX_PAGESIZE
geo->blocksize = CONFIG_AT24XX_MTD_BLOCKSIZE;
geo->erasesize = CONFIG_AT24XX_MTD_BLOCKSIZE;
geo->neraseblocks = (CONFIG_AT24XX_SIZE * 1024 / 8) / CONFIG_AT24XX_MTD_BLOCKSIZE;
geo->neraseblocks = (CONFIG_AT24XX_SIZE * 1024 / 8) /
CONFIG_AT24XX_MTD_BLOCKSIZE;
#else
geo->blocksize = priv->pagesize;
geo->erasesize = priv->pagesize;