#include <linux/bitops.h>
/* SPI mode flags */
-#define SPI_CPHA BIT(0) /* clock phase */
-#define SPI_CPOL BIT(1) /* clock polarity */
+#define SPI_CPHA BIT(0) /* clock phase (1 = SPI_CLOCK_PHASE_SECOND) */
+#define SPI_CPOL BIT(1) /* clock polarity (1 = SPI_POLARITY_HIGH) */
#define SPI_MODE_0 (0|0) /* (original MicroWire) */
#define SPI_MODE_1 (0|SPI_CPHA)
#define SPI_MODE_2 (SPI_CPOL|0)
#define SPI_DEFAULT_WORDLEN 8
-#ifdef CONFIG_DM_SPI
-/* TODO(sjg@chromium.org): Remove this and use max_hz from struct spi_slave */
+/**
+ * struct dm_spi_bus - SPI bus info
+ *
+ * This contains information about a SPI bus. To obtain this structure, use
+ * dev_get_uclass_priv(bus) where bus is the SPI bus udevice.
+ *
+ * @max_hz: Maximum speed that the bus can tolerate.
+ * @speed: Current bus speed. This is 0 until the bus is first claimed.
+ * @mode: Current bus mode. This is 0 until the bus is first claimed.
+ *
+ * TODO(sjg@chromium.org): Remove this and use max_hz from struct spi_slave.
+ */
struct dm_spi_bus {
uint max_hz;
+ uint speed;
+ uint mode;
};
/**
- * struct dm_spi_platdata - platform data for all SPI slaves
+ * struct dm_spi_plat - platform data for all SPI slaves
*
* This describes a SPI slave, a child device of the SPI bus. To obtain this
- * struct from a spi_slave, use dev_get_parent_platdata(dev) or
- * dev_get_parent_platdata(slave->dev).
+ * struct from a spi_slave, use dev_get_parent_plat(dev) or
+ * dev_get_parent_plat(slave->dev).
*
- * This data is immuatable. Each time the device is probed, @max_hz and @mode
+ * This data is immutable. Each time the device is probed, @max_hz and @mode
* will be copied to struct spi_slave.
*
* @cs: Chip select number (0..n-1)
* @max_hz: Maximum bus speed that this slave can tolerate
* @mode: SPI mode to use for this device (see SPI mode flags)
*/
-struct dm_spi_slave_platdata {
+struct dm_spi_slave_plat {
unsigned int cs;
uint max_hz;
uint mode;
};
-#endif /* CONFIG_DM_SPI */
-
/**
* enum spi_clock_phase - indicates the clock phase to use for SPI (CPHA)
*
*
* For driver model this is the per-child data used by the SPI bus. It can
* be accessed using dev_get_parent_priv() on the slave device. The SPI uclass
- * sets uip per_child_auto_alloc_size to sizeof(struct spi_slave), and the
+ * sets up per_child_auto to sizeof(struct spi_slave), and the
* driver should not override it. Two platform data fields (max_hz and mode)
* are copied into this structure to provide an initial value. This allows
* them to be changed, since we should never change platform data in drivers.
*
* @dev: SPI slave device
* @max_hz: Maximum speed for this slave
- * @speed: Current bus speed. This is 0 until the bus is first
- * claimed.
* @bus: ID of the bus that the slave is attached to. For
* driver model this is the sequence number of the SPI
- * bus (bus->seq) so does not need to be stored
+ * bus (dev_seq(bus)) so does not need to be stored
* @cs: ID of the chip select connected to the slave.
* @mode: SPI mode to use for this slave (see SPI mode flags)
* @wordlen: Size of SPI word in number of bits
* @flags: Indication of SPI flags.
*/
struct spi_slave {
-#ifdef CONFIG_DM_SPI
+#if CONFIG_IS_ENABLED(DM_SPI)
struct udevice *dev; /* struct spi_slave is dev->parentdata */
uint max_hz;
- uint speed;
#else
unsigned int bus;
unsigned int cs;
#define SPI_XFER_BEGIN BIT(0) /* Assert CS before transfer */
#define SPI_XFER_END BIT(1) /* Deassert CS after transfer */
#define SPI_XFER_ONCE (SPI_XFER_BEGIN | SPI_XFER_END)
-#define SPI_XFER_MMAP BIT(2) /* Memory Mapped start */
-#define SPI_XFER_MMAP_END BIT(3) /* Memory Mapped End */
};
/**
*/
int spi_cs_is_valid(unsigned int bus, unsigned int cs);
-#ifndef CONFIG_DM_SPI
+/*
+ * These names are used in several drivers and these declarations will be
+ * removed soon as part of the SPI DM migration. Drop them if driver model is
+ * enabled for SPI.
+ */
+#if !CONFIG_IS_ENABLED(DM_SPI)
/**
* Activate a SPI chipselect.
* This function is provided by the board code when using a driver
* select to the device identified by "slave".
*/
void spi_cs_deactivate(struct spi_slave *slave);
+#endif
/**
* Set transfer speed.
* @hz: The transfer speed
*/
void spi_set_speed(struct spi_slave *slave, uint hz);
-#endif
/**
* Write 8 bits, then read 8 bits.
return ret < 0 ? ret : din[1];
}
-#ifdef CONFIG_DM_SPI
-
/**
* struct spi_cs_info - Information about a bus chip select
*
* is automatically bound on this chip select with requested speed and mode.
*
* Ths new slave device is probed ready for use with the speed and mode
- * from platdata when available or the requested values.
+ * from plat when available or the requested values.
*
* @busnum: SPI bus number
* @cs: Chip select to look for
- * @speed: SPI speed to use for this slave when not available in platdata
- * @mode: SPI mode to use for this slave when not available in platdata
+ * @speed: SPI speed to use for this slave when not available in plat
+ * @mode: SPI mode to use for this slave when not available in plat
* @drv_name: Name of driver to attach to this chip select
* @dev_name: Name of the new device thus created
* @busp: Returns bus device
int spi_find_chip_select(struct udevice *bus, int cs, struct udevice **devp);
/**
- * spi_slave_ofdata_to_platdata() - decode standard SPI platform data
+ * spi_slave_of_to_plat() - decode standard SPI platform data
*
* This decodes the speed and mode for a slave from a device tree node
*
* @node: Node offset to read from
* @plat: Place to put the decoded information
*/
-int spi_slave_ofdata_to_platdata(struct udevice *dev,
- struct dm_spi_slave_platdata *plat);
+int spi_slave_of_to_plat(struct udevice *dev, struct dm_spi_slave_plat *plat);
/**
* spi_cs_info() - Check information on a chip select
/* Access the operations for a SPI device */
#define spi_get_ops(dev) ((struct dm_spi_ops *)(dev)->driver->ops)
#define spi_emul_get_ops(dev) ((struct dm_spi_emul_ops *)(dev)->driver->ops)
-#endif /* CONFIG_DM_SPI */
#endif /* _SPI_H_ */
projects / platform / kernel / u-boot.git / blobdiff