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drivers/spi/spi_bitbang: Add private data on spi_bitbang

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Add private data for spi_bitbang low-level driver to add an instance
specific private data.
And add spi_destroy_bitbang() to clean up a driver instance.
This commit is contained in:
SPRESENSE 2021-09-14 22:18:52 +09:00 committed by Xiang Xiao
parent e542ef9175
commit 307839ab6d
4 changed files with 28 additions and 4 deletions
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2
boards/arm/sam34/arduino-due/src/sam_mmcsd.c
View File

@ -217,7 +217,7 @@ static struct spi_dev_s *sam_mmcsd_spiinitialize(void)
/* Create the SPI driver instance */
return spi_create_bitbang(&g_spiops);
return spi_create_bitbang(&g_spiops, NULL);
}
/****************************************************************************

2
boards/arm/sam34/arduino-due/src/sam_touchscreen.c
View File

@ -313,7 +313,7 @@ static struct spi_dev_s *sam_tsc_spiinitialize(void)
/* Create the SPI driver instance */
return spi_create_bitbang(&g_spiops);
return spi_create_bitbang(&g_spiops, NULL);
}
/****************************************************************************

10
drivers/spi/spi_bitbang.c
View File

@ -515,7 +515,8 @@ static int spi_cmddata(FAR struct spi_dev_s *dev, uint32_t devid,
****************************************************************************/
FAR struct spi_dev_s *spi_create_bitbang(FAR const struct
spi_bitbang_ops_s *low)
spi_bitbang_ops_s *low,
FAR void *low_priv)
{
FAR struct spi_bitbang_s *priv;
@ -535,6 +536,7 @@ FAR struct spi_dev_s *spi_create_bitbang(FAR const struct
priv->dev.ops = &g_spiops;
priv->low = low;
priv->priv = low_priv;
#ifdef CONFIG_SPI_BITBANG_VARWIDTH
priv->nbits = 8;
#endif
@ -551,4 +553,10 @@ FAR struct spi_dev_s *spi_create_bitbang(FAR const struct
return &priv->dev;
}
void spi_destroy_bitbang(FAR struct spi_dev_s *dev)
{
DEBUGASSERT(dev);
kmm_free(dev);
}
#endif /* CONFIG_SPI_BITBANG */

18
include/nuttx/spi/spi_bitbang.h
View File

@ -88,6 +88,7 @@ struct spi_bitbang_s
uint32_t holdtime; /* SCK hold time to achieve requested frequency */
bitexchange_t exchange; /* The select bit exchange function */
mutex_t lock; /* Supports mutually exclusive access to SPI */
FAR void *priv; /* Private data for instance specific */
#ifdef CONFIG_SPI_BITBANG_VARWIDTH
uint8_t nbits; /* Number of bits in the transfer */
#endif
@ -118,6 +119,7 @@ extern "C"
*
* Input Parameters:
* low - Low-level, platform specific device operations.
* low_priv - Low-level private data, platform specific data.
*
* Returned Value:
* On success a non-NULL, initialized SPI driver instance is returned.
@ -125,7 +127,21 @@ extern "C"
****************************************************************************/
FAR struct spi_dev_s *spi_create_bitbang(
FAR const struct spi_bitbang_ops_s *low);
FAR const struct spi_bitbang_ops_s *low,
FAR void *low_priv);
/****************************************************************************
* Name: spi_destroy_bitbang
*
* Description:
* Destroy an instance of the SPI bit-bang driver.
*
* Input Parameters:
* dev - device instance, target driver to destroy.
*
****************************************************************************/
void spi_destroy_bitbang(FAR struct spi_dev_s *dev);
#undef EXTERN
#if defined(__cplusplus)