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-rw-r--r--drivers/iio/accel/Kconfig10
-rw-r--r--drivers/iio/accel/Makefile1
-rw-r--r--drivers/iio/accel/kxsd9-spi.c110
-rw-r--r--drivers/iio/accel/kxsd9.c147
-rw-r--r--drivers/iio/accel/kxsd9.h32
5 files changed, 173 insertions, 127 deletions
diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
index 13b8a18785de..89bc5c5d6fd0 100644
--- a/drivers/iio/accel/Kconfig
+++ b/drivers/iio/accel/Kconfig
@@ -119,7 +119,6 @@ config IIO_ST_ACCEL_SPI_3AXIS
config KXSD9
tristate "Kionix KXSD9 Accelerometer Driver"
- depends on SPI
help
Say yes here to build support for the Kionix KXSD9 accelerometer.
Currently this only supports the device via an SPI interface.
@@ -127,6 +126,15 @@ config KXSD9
To compile this driver as a module, choose M here: the module
will be called kxsd9.
+config KXSD9_SPI
+ tristate "Kionix KXSD9 SPI transport"
+ depends on KXSD9
+ depends on SPI
+ default KXSD9
+ help
+ Say yes here to enable the Kionix KXSD9 accelerometer
+ SPI transport channel.
+
config KXCJK1013
tristate "Kionix 3-Axis Accelerometer Driver"
depends on I2C
diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile
index e974841ec9cf..2fe41d7ffb6e 100644
--- a/drivers/iio/accel/Makefile
+++ b/drivers/iio/accel/Makefile
@@ -13,6 +13,7 @@ obj-$(CONFIG_DMARD09) += dmard09.o
obj-$(CONFIG_HID_SENSOR_ACCEL_3D) += hid-sensor-accel-3d.o
obj-$(CONFIG_KXCJK1013) += kxcjk-1013.o
obj-$(CONFIG_KXSD9) += kxsd9.o
+obj-$(CONFIG_KXSD9_SPI) += kxsd9-spi.o
obj-$(CONFIG_MMA7455) += mma7455_core.o
obj-$(CONFIG_MMA7455_I2C) += mma7455_i2c.o
diff --git a/drivers/iio/accel/kxsd9-spi.c b/drivers/iio/accel/kxsd9-spi.c
new file mode 100644
index 000000000000..ec9d00d5340f
--- /dev/null
+++ b/drivers/iio/accel/kxsd9-spi.c
@@ -0,0 +1,110 @@
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include "kxsd9.h"
+
+#define KXSD9_READ(a) (0x80 | (a))
+#define KXSD9_WRITE(a) (a)
+
+static int kxsd9_spi_readreg(struct kxsd9_transport *tr, u8 address)
+{
+ struct spi_device *spi = tr->trdev;
+
+ return spi_w8r8(spi, KXSD9_READ(address));
+}
+
+static int kxsd9_spi_writereg(struct kxsd9_transport *tr, u8 address, u8 val)
+{
+ struct spi_device *spi = tr->trdev;
+
+ tr->tx[0] = KXSD9_WRITE(address),
+ tr->tx[1] = val;
+ return spi_write(spi, tr->tx, 2);
+}
+
+static int kxsd9_spi_write2(struct kxsd9_transport *tr, u8 b1, u8 b2)
+{
+ struct spi_device *spi = tr->trdev;
+
+ tr->tx[0] = b1;
+ tr->tx[1] = b2;
+ return spi_write(spi, tr->tx, 2);
+}
+
+static int kxsd9_spi_readval(struct kxsd9_transport *tr, u8 address)
+{
+ struct spi_device *spi = tr->trdev;
+ struct spi_transfer xfers[] = {
+ {
+ .bits_per_word = 8,
+ .len = 1,
+ .delay_usecs = 200,
+ .tx_buf = tr->tx,
+ }, {
+ .bits_per_word = 8,
+ .len = 2,
+ .rx_buf = tr->rx,
+ },
+ };
+ int ret;
+
+ tr->tx[0] = KXSD9_READ(address);
+ ret = spi_sync_transfer(spi, xfers, ARRAY_SIZE(xfers));
+ if (!ret)
+ ret = (((u16)(tr->rx[0])) << 8) | (tr->rx[1]);
+ return ret;
+}
+
+static int kxsd9_spi_probe(struct spi_device *spi)
+{
+ struct kxsd9_transport *transport;
+ int ret;
+
+ transport = devm_kzalloc(&spi->dev, sizeof(*transport), GFP_KERNEL);
+ if (!transport)
+ return -ENOMEM;
+
+ transport->trdev = spi;
+ transport->readreg = kxsd9_spi_readreg;
+ transport->writereg = kxsd9_spi_writereg;
+ transport->write2 = kxsd9_spi_write2;
+ transport->readval = kxsd9_spi_readval;
+ spi->mode = SPI_MODE_0;
+ spi_setup(spi);
+
+ ret = kxsd9_common_probe(&spi->dev,
+ transport,
+ spi_get_device_id(spi)->name);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int kxsd9_spi_remove(struct spi_device *spi)
+{
+ return kxsd9_common_remove(&spi->dev);
+}
+
+static const struct spi_device_id kxsd9_spi_id[] = {
+ {"kxsd9", 0},
+ { },
+};
+MODULE_DEVICE_TABLE(spi, kxsd9_spi_id);
+
+static struct spi_driver kxsd9_spi_driver = {
+ .driver = {
+ .name = "kxsd9",
+ },
+ .probe = kxsd9_spi_probe,
+ .remove = kxsd9_spi_remove,
+ .id_table = kxsd9_spi_id,
+};
+module_spi_driver(kxsd9_spi_driver);
+
+MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
+MODULE_DESCRIPTION("Kionix KXSD9 SPI driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/kxsd9.c b/drivers/iio/accel/kxsd9.c
index 1f9e9a867f34..e2033374bfef 100644
--- a/drivers/iio/accel/kxsd9.c
+++ b/drivers/iio/accel/kxsd9.c
@@ -18,7 +18,6 @@
#include <linux/device.h>
#include <linux/kernel.h>
-#include <linux/spi/spi.h>
#include <linux/sysfs.h>
#include <linux/slab.h>
#include <linux/module.h>
@@ -26,6 +25,8 @@
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
+#include "kxsd9.h"
+
#define KXSD9_REG_X 0x00
#define KXSD9_REG_Y 0x02
#define KXSD9_REG_Z 0x04
@@ -38,32 +39,6 @@
#define KXSD9_REG_CTRL_B 0x0d
#define KXSD9_REG_CTRL_A 0x0e
-#define KXSD9_READ(a) (0x80 | (a))
-#define KXSD9_WRITE(a) (a)
-
-#define KXSD9_STATE_RX_SIZE 2
-#define KXSD9_STATE_TX_SIZE 2
-
-struct kxsd9_transport;
-
-/**
- * struct kxsd9_transport - transport adapter for SPI or I2C
- * @trdev: transport device such as SPI or I2C
- * @write1(): function to write a byte to the device
- * @write2(): function to write two consecutive bytes to the device
- * @readval(): function to read a 16bit value from the device
- * @rx: cache aligned read buffer
- * @tx: cache aligned write buffer
- */
-struct kxsd9_transport {
- void *trdev;
- int (*write1) (struct kxsd9_transport *tr, u8 byte);
- int (*write2) (struct kxsd9_transport *tr, u8 b1, u8 b2);
- int (*readval) (struct kxsd9_transport *tr, u8 address);
- u8 rx[KXSD9_STATE_RX_SIZE] ____cacheline_aligned;
- u8 tx[KXSD9_STATE_TX_SIZE];
-};
-
/**
* struct kxsd9_state - device related storage
* @transport: transport for the KXSD9
@@ -98,12 +73,13 @@ static int kxsd9_write_scale(struct iio_dev *indio_dev, int micro)
return -EINVAL;
mutex_lock(&st->buf_lock);
- ret = st->transport->write1(st->transport, KXSD9_READ(KXSD9_REG_CTRL_C));
- if (ret)
+ ret = st->transport->readreg(st->transport,
+ KXSD9_REG_CTRL_C);
+ if (ret < 0)
goto error_ret;
- ret = st->transport->write2(st->transport,
- KXSD9_WRITE(KXSD9_REG_CTRL_C),
- (ret & ~KXSD9_FS_MASK) | i);
+ ret = st->transport->writereg(st->transport,
+ KXSD9_REG_CTRL_C,
+ (ret & ~KXSD9_FS_MASK) | i);
error_ret:
mutex_unlock(&st->buf_lock);
return ret;
@@ -115,7 +91,9 @@ static int kxsd9_read(struct iio_dev *indio_dev, u8 address)
struct kxsd9_state *st = iio_priv(indio_dev);
mutex_lock(&st->buf_lock);
- ret = st->transport->readval(st->transport, KXSD9_READ(address));
+ ret = st->transport->readval(st->transport, address);
+ /* Only 12 bits are valid */
+ ret &= 0xfff0;
mutex_unlock(&st->buf_lock);
return ret;
}
@@ -165,8 +143,9 @@ static int kxsd9_read_raw(struct iio_dev *indio_dev,
ret = IIO_VAL_INT;
break;
case IIO_CHAN_INFO_SCALE:
- ret = st->transport->write1(st->transport, KXSD9_READ(KXSD9_REG_CTRL_C));
- if (ret)
+ ret = st->transport->readreg(st->transport,
+ KXSD9_REG_CTRL_C);
+ if (ret < 0)
goto error_ret;
*val = 0;
*val2 = kxsd9_micro_scales[ret & KXSD9_FS_MASK];
@@ -218,9 +197,9 @@ static const struct iio_info kxsd9_info = {
.driver_module = THIS_MODULE,
};
-static int kxsd9_common_probe(struct device *parent,
- struct kxsd9_transport *transport,
- const char *name)
+int kxsd9_common_probe(struct device *parent,
+ struct kxsd9_transport *transport,
+ const char *name)
{
struct iio_dev *indio_dev;
struct kxsd9_state *st;
@@ -251,8 +230,9 @@ static int kxsd9_common_probe(struct device *parent,
return 0;
}
+EXPORT_SYMBOL(kxsd9_common_probe);
-static int kxsd9_common_remove(struct device *parent)
+int kxsd9_common_remove(struct device *parent)
{
struct iio_dev *indio_dev = dev_get_drvdata(parent);
@@ -260,93 +240,8 @@ static int kxsd9_common_remove(struct device *parent)
return 0;
}
-
-static int kxsd9_spi_write1(struct kxsd9_transport *tr, u8 byte)
-{
- struct spi_device *spi = tr->trdev;
-
- return spi_w8r8(spi, byte);
-}
-
-static int kxsd9_spi_write2(struct kxsd9_transport *tr, u8 b1, u8 b2)
-{
- struct spi_device *spi = tr->trdev;
-
- tr->tx[0] = b1;
- tr->tx[1] = b2;
- return spi_write(spi, tr->tx, 2);
-}
-
-static int kxsd9_spi_readval(struct kxsd9_transport *tr, u8 address)
-{
- struct spi_device *spi = tr->trdev;
- struct spi_transfer xfers[] = {
- {
- .bits_per_word = 8,
- .len = 1,
- .delay_usecs = 200,
- .tx_buf = tr->tx,
- }, {
- .bits_per_word = 8,
- .len = 2,
- .rx_buf = tr->rx,
- },
- };
- int ret;
-
- tr->tx[0] = address;
- ret = spi_sync_transfer(spi, xfers, ARRAY_SIZE(xfers));
- if (!ret)
- ret = (((u16)(tr->rx[0])) << 8) | (tr->rx[1] & 0xF0);
- return ret;
-}
-
-static int kxsd9_spi_probe(struct spi_device *spi)
-{
- struct kxsd9_transport *transport;
- int ret;
-
- transport = devm_kzalloc(&spi->dev, sizeof(*transport), GFP_KERNEL);
- if (!transport)
- return -ENOMEM;
-
- transport->trdev = spi;
- transport->write1 = kxsd9_spi_write1;
- transport->write2 = kxsd9_spi_write2;
- transport->readval = kxsd9_spi_readval;
- spi->mode = SPI_MODE_0;
- spi_setup(spi);
-
- ret = kxsd9_common_probe(&spi->dev,
- transport,
- spi_get_device_id(spi)->name);
- if (ret)
- return ret;
-
- return 0;
-}
-
-static int kxsd9_spi_remove(struct spi_device *spi)
-{
- return kxsd9_common_remove(&spi->dev);
-}
-
-static const struct spi_device_id kxsd9_spi_id[] = {
- {"kxsd9", 0},
- { },
-};
-MODULE_DEVICE_TABLE(spi, kxsd9_spi_id);
-
-static struct spi_driver kxsd9_spi_driver = {
- .driver = {
- .name = "kxsd9",
- },
- .probe = kxsd9_spi_probe,
- .remove = kxsd9_spi_remove,
- .id_table = kxsd9_spi_id,
-};
-module_spi_driver(kxsd9_spi_driver);
+EXPORT_SYMBOL(kxsd9_common_remove);
MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
-MODULE_DESCRIPTION("Kionix KXSD9 SPI driver");
+MODULE_DESCRIPTION("Kionix KXSD9 driver");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/kxsd9.h b/drivers/iio/accel/kxsd9.h
new file mode 100644
index 000000000000..28845c3440e9
--- /dev/null
+++ b/drivers/iio/accel/kxsd9.h
@@ -0,0 +1,32 @@
+#include <linux/device.h>
+#include <linux/kernel.h>
+
+#define KXSD9_STATE_RX_SIZE 2
+#define KXSD9_STATE_TX_SIZE 2
+
+struct kxsd9_transport;
+
+/**
+ * struct kxsd9_transport - transport adapter for SPI or I2C
+ * @trdev: transport device such as SPI or I2C
+ * @readreg(): function to read a byte from an address in the device
+ * @writereg(): function to write a byte to an address in the device
+ * @write2(): function to write two consecutive bytes to the device
+ * @readval(): function to read a 16bit value from the device
+ * @rx: cache aligned read buffer
+ * @tx: cache aligned write buffer
+ */
+struct kxsd9_transport {
+ void *trdev;
+ int (*readreg) (struct kxsd9_transport *tr, u8 address);
+ int (*writereg) (struct kxsd9_transport *tr, u8 address, u8 val);
+ int (*write2) (struct kxsd9_transport *tr, u8 b1, u8 b2);
+ int (*readval) (struct kxsd9_transport *tr, u8 address);
+ u8 rx[KXSD9_STATE_RX_SIZE] ____cacheline_aligned;
+ u8 tx[KXSD9_STATE_TX_SIZE];
+};
+
+int kxsd9_common_probe(struct device *parent,
+ struct kxsd9_transport *transport,
+ const char *name);
+int kxsd9_common_remove(struct device *parent);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-14 05:41:25 +0000