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authorMark Brown <broonie@linaro.org>2013-10-25 12:51:25 +0400
committerMark Brown <broonie@linaro.org>2013-10-25 12:51:25 +0400
commit8f737d6185e010769f144418edb3d10fca05b2ba (patch)
tree901b611302d4c363862d56ceee1d0b173889a1c1 /drivers/spi
parentd42b70f5c733478313433b24e66a1ff605f852bd (diff)
parent5fe5f05e2202414a8b9015e9aedf19e08f6fe832 (diff)
downloadlinux-8f737d6185e010769f144418edb3d10fca05b2ba.tar.xz
Merge remote-tracking branch 'spi/topic/core' into spi-next
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi.c77
1 files changed, 36 insertions, 41 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index f7d792366b6a..99c05f639e1b 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -58,11 +58,13 @@ modalias_show(struct device *dev, struct device_attribute *a, char *buf)
return sprintf(buf, "%s%s\n", SPI_MODULE_PREFIX, spi->modalias);
}
+static DEVICE_ATTR_RO(modalias);
-static struct device_attribute spi_dev_attrs[] = {
- __ATTR_RO(modalias),
- __ATTR_NULL,
+static struct attribute *spi_dev_attrs[] = {
+ &dev_attr_modalias.attr,
+ NULL,
};
+ATTRIBUTE_GROUPS(spi_dev);
/* modalias support makes "modprobe $MODALIAS" new-style hotplug work,
* and the sysfs version makes coldplug work too.
@@ -229,7 +231,7 @@ static const struct dev_pm_ops spi_pm = {
struct bus_type spi_bus_type = {
.name = "spi",
- .dev_attrs = spi_dev_attrs,
+ .dev_groups = spi_dev_groups,
.match = spi_match_device,
.uevent = spi_uevent,
.pm = &spi_pm,
@@ -323,7 +325,7 @@ struct spi_device *spi_alloc_device(struct spi_master *master)
if (!spi_master_get(master))
return NULL;
- spi = kzalloc(sizeof *spi, GFP_KERNEL);
+ spi = kzalloc(sizeof(*spi), GFP_KERNEL);
if (!spi) {
dev_err(dev, "cannot alloc spi_device\n");
spi_master_put(master);
@@ -838,10 +840,8 @@ static void of_register_spi_devices(struct spi_master *master)
{
struct spi_device *spi;
struct device_node *nc;
- const __be32 *prop;
- char modalias[SPI_NAME_SIZE + 4];
int rc;
- int len;
+ u32 value;
if (!master->dev.of_node)
return;
@@ -866,14 +866,14 @@ static void of_register_spi_devices(struct spi_master *master)
}
/* Device address */
- prop = of_get_property(nc, "reg", &len);
- if (!prop || len < sizeof(*prop)) {
- dev_err(&master->dev, "%s has no 'reg' property\n",
- nc->full_name);
+ 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);
spi_dev_put(spi);
continue;
}
- spi->chip_select = be32_to_cpup(prop);
+ spi->chip_select = value;
/* Mode (clock phase/polarity/etc.) */
if (of_find_property(nc, "spi-cpha", NULL))
@@ -886,55 +886,53 @@ static void of_register_spi_devices(struct spi_master *master)
spi->mode |= SPI_3WIRE;
/* Device DUAL/QUAD mode */
- prop = of_get_property(nc, "spi-tx-bus-width", &len);
- if (prop && len == sizeof(*prop)) {
- switch (be32_to_cpup(prop)) {
- case SPI_NBITS_SINGLE:
+ if (!of_property_read_u32(nc, "spi-tx-bus-width", &value)) {
+ switch (value) {
+ case 1:
break;
- case SPI_NBITS_DUAL:
+ case 2:
spi->mode |= SPI_TX_DUAL;
break;
- case SPI_NBITS_QUAD:
+ case 4:
spi->mode |= SPI_TX_QUAD;
break;
default:
dev_err(&master->dev,
"spi-tx-bus-width %d not supported\n",
- be32_to_cpup(prop));
+ value);
spi_dev_put(spi);
continue;
}
}
- prop = of_get_property(nc, "spi-rx-bus-width", &len);
- if (prop && len == sizeof(*prop)) {
- switch (be32_to_cpup(prop)) {
- case SPI_NBITS_SINGLE:
+ if (!of_property_read_u32(nc, "spi-rx-bus-width", &value)) {
+ switch (value) {
+ case 1:
break;
- case SPI_NBITS_DUAL:
+ case 2:
spi->mode |= SPI_RX_DUAL;
break;
- case SPI_NBITS_QUAD:
+ case 4:
spi->mode |= SPI_RX_QUAD;
break;
default:
dev_err(&master->dev,
"spi-rx-bus-width %d not supported\n",
- be32_to_cpup(prop));
+ value);
spi_dev_put(spi);
continue;
}
}
/* Device speed */
- prop = of_get_property(nc, "spi-max-frequency", &len);
- if (!prop || len < sizeof(*prop)) {
- dev_err(&master->dev, "%s has no 'spi-max-frequency' property\n",
- nc->full_name);
+ rc = of_property_read_u32(nc, "spi-max-frequency", &value);
+ if (rc) {
+ dev_err(&master->dev, "%s has no valid 'spi-max-frequency' property (%d)\n",
+ nc->full_name, rc);
spi_dev_put(spi);
continue;
}
- spi->max_speed_hz = be32_to_cpup(prop);
+ spi->max_speed_hz = value;
/* IRQ */
spi->irq = irq_of_parse_and_map(nc, 0);
@@ -944,9 +942,7 @@ static void of_register_spi_devices(struct spi_master *master)
spi->dev.of_node = nc;
/* Register the new device */
- snprintf(modalias, sizeof(modalias), "%s%s", SPI_MODULE_PREFIX,
- spi->modalias);
- request_module(modalias);
+ request_module("%s%s", SPI_MODULE_PREFIX, spi->modalias);
rc = spi_add_device(spi);
if (rc) {
dev_err(&master->dev, "spi_device register error %s\n",
@@ -1097,7 +1093,7 @@ struct spi_master *spi_alloc_master(struct device *dev, unsigned size)
if (!dev)
return NULL;
- master = kzalloc(size + sizeof *master, GFP_KERNEL);
+ master = kzalloc(size + sizeof(*master), GFP_KERNEL);
if (!master)
return NULL;
@@ -1122,7 +1118,7 @@ static int of_spi_register_master(struct spi_master *master)
return 0;
nb = of_gpio_named_count(np, "cs-gpios");
- master->num_chipselect = max(nb, (int)master->num_chipselect);
+ master->num_chipselect = max_t(int, nb, master->num_chipselect);
/* Return error only for an incorrectly formed cs-gpios property */
if (nb == 0 || nb == -ENOENT)
@@ -1437,8 +1433,7 @@ int spi_setup(struct spi_device *spi)
if (spi->master->setup)
status = spi->master->setup(spi);
- dev_dbg(&spi->dev, "setup mode %d, %s%s%s%s"
- "%u bits/w, %u Hz max --> %d\n",
+ dev_dbg(&spi->dev, "setup mode %d, %s%s%s%s%u bits/w, %u Hz max --> %d\n",
(int) (spi->mode & (SPI_CPOL | SPI_CPHA)),
(spi->mode & SPI_CS_HIGH) ? "cs_high, " : "",
(spi->mode & SPI_LSB_FIRST) ? "lsb, " : "",
@@ -1797,7 +1792,7 @@ int spi_bus_unlock(struct spi_master *master)
EXPORT_SYMBOL_GPL(spi_bus_unlock);
/* portable code must never pass more than 32 bytes */
-#define SPI_BUFSIZ max(32,SMP_CACHE_BYTES)
+#define SPI_BUFSIZ max(32, SMP_CACHE_BYTES)
static u8 *buf;
@@ -1846,7 +1841,7 @@ int spi_write_then_read(struct spi_device *spi,
}
spi_message_init(&message);
- memset(x, 0, sizeof x);
+ memset(x, 0, sizeof(x));
if (n_tx) {
x[0].len = n_tx;
spi_message_add_tail(&x[0], &message);