evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

spi: core: Extract of_spi_parse_dt()

Browse source 
Extract the parsing of SPI slave-specific properties into its own
function, so it can be reused later for SPI slave controllers.

Change-Id: I6e401d369c7ee7aead1f404c8e0b6dfffcb5b65d
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>
Git-commit: c2e51ac3d0542440d5b2b8b52ff2ad00751af4da
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Signed-off-by: Alok Chauhan <alokc@codeaurora.org>
This commit is contained in:
Geert Uytterhoeven 2016-09-12 22:50:41 +02:00 • committed by Alok Chauhan
parent 6d08baec31
commit 095216be1d
1 changed files with 36 additions and 24 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

60
drivers/spi/spi.c
View file

@ -1421,37 +1421,18 @@ err_init_queue:
/*-------------------------------------------------------------------------*/
#if defined(CONFIG_OF)
static struct spi_device *
of_register_spi_device(struct spi_master *master, struct device_node *nc)
static int of_spi_parse_dt(struct spi_master *master, struct spi_device *spi,
struct device_node *nc)
{
struct spi_device *spi;
int rc;
u32 value;
/* Alloc an spi_device */
spi = spi_alloc_device(master);
if (!spi) {
dev_err(&master->dev, "spi_device alloc error for %s\n",
nc->full_name);
rc = -ENOMEM;
goto err_out;
}
/* Select device driver */
rc = of_modalias_node(nc, spi->modalias,
sizeof(spi->modalias));
if (rc < 0) {
dev_err(&master->dev, "cannot find modalias for %s\n",
nc->full_name);
goto err_out;
}
int rc;
/* Device address */
rc = of_property_read_u32(nc, "reg", &value);
if (rc) {
dev_err(&master->dev, "%s has no valid 'reg' property (%d)\n",
nc->full_name, rc);
goto err_out;
return rc;
}
spi->chip_select = value;
@ -1509,10 +1490,41 @@ of_register_spi_device(struct spi_master *master, struct device_node *nc)
if (rc) {
dev_err(&master->dev, "%s has no valid 'spi-max-frequency' property (%d)\n",
nc->full_name, rc);
goto err_out;
return rc;
}
spi->max_speed_hz = value;
return 0;
}
static struct spi_device *
of_register_spi_device(struct spi_master *master, struct device_node *nc)
{
struct spi_device *spi;
int rc;
/* Alloc an spi_device */
spi = spi_alloc_device(master);
if (!spi) {
dev_err(&master->dev, "spi_device alloc error for %s\n",
nc->full_name);
rc = -ENOMEM;
goto err_out;
}
/* Select device driver */
rc = of_modalias_node(nc, spi->modalias,
sizeof(spi->modalias));
if (rc < 0) {
dev_err(&master->dev, "cannot find modalias for %s\n",
nc->full_name);
goto err_out;
}
rc = of_spi_parse_dt(master, spi, nc);
if (rc)
goto err_out;
/* Store a pointer to the node in the device structure */
of_node_get(nc);
spi->dev.of_node = nc;