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arch/z80/src/ez80/ez80_spi.c: Cosmetic changes from code review.

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This commit is contained in:
Gregory Nutt
2019-06-03 23:59:53 -06:00
parent 59f3180179
commit 6fbfd00396
1 changed files with 46 additions and 37 deletions
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arch/z80/src/ez80/ez80_spi.c
+20 -11
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@@ -111,8 +111,14 @@ static const struct spi_ops_s g_spiops =
* array with one 'struct spi_dev_s' instance per bus.
*/
static struct spi_dev_s g_spidev = {&g_spiops};
static sem_t g_exclsem = SEM_INITIALIZER(1); /* For mutually exclusive access */
static struct spi_dev_s g_spidev =
{
&g_spiops
};
/* Semaphore supports mutually exclusive access */
static sem_t g_exclsem = SEM_INITIALIZER(1);
/****************************************************************************
* Private Functions
@@ -183,10 +189,11 @@ static int spi_lock(FAR struct spi_dev_s *dev, bool lock)
*
****************************************************************************/
static uint32_t spi_setfrequency(FAR struct spi_dev_s *dev, uint32_t frequency)
static uint32_t spi_setfrequency(FAR struct spi_dev_s *dev,
uint32_t frequency)
{
/* We want select divisor to provide the highest frequency (SPIR) that does NOT
* exceed the requested frequency.:
/* We want select divisor to provide the highest frequency (SPIR) that does
* NOT exceed the requested frequency.:
*
* SPIR <= System Clock Frequency / (2 * BRG)
*
@@ -297,6 +304,7 @@ static uint8_t spi_waitspif(void)
status = inp(EZ80_SPI_SR) & (SPI_SR_SPIF | SPI_SR_WCOL | SPI_SR_MODF);
}
while (status == 0);
return status;
}
@@ -397,18 +405,19 @@ static void spi_sndblock(FAR struct spi_dev_s *dev, FAR const void *buffer,
* Input Parameters:
* dev - Device-specific state data
* buffer - A pointer to the buffer in which to recieve data
* buflen - the length of data that can be received in the buffer in number
* of words. The wordsize is determined by the number of bits-per-word
* selected for the SPI interface. If nbits <= 8, the data is
* packed into uint8_t's; if nbits >8, the data is packed into
* uint16_t's
* buflen - The length of data that can be received in the buffer in
* number of words. The wordsize is determined by the number of
* bits-per-word selected for the SPI interface. If nbits <= 8,
* the data is packed into uint8_t's; if nbits >8, the data is
* packed into uint16_t's
*
* Returned Value:
* None
*
****************************************************************************/
static void spi_recvblock(FAR struct spi_dev_s *dev, FAR void *buffer, size_t buflen)
static void spi_recvblock(FAR struct spi_dev_s *dev, FAR void *buffer,
size_t buflen)
{
FAR uint8_t *ptr = (FAR uint8_t *)buffer;