Merge tag 'spi-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "Business as usual for SPI - some new drivers, lots of fixes and
  updates to existing drivers plus some new framework features.  Notable
  changes are:

   - Support for dual and quad data lines, commonly used by flash chips
     to improve performance, from Wang Yuhang.
   - Factored out a common pattern for runtime PM implementation into
     the core saving a bunch of code.
   - A particularly nice set of updates to the ep93xx driver from
     H Hartley Sweeten, modernising it and reducing the code size a lot.
   - New drivers for Blackfin v3, EFM32, Freescale DSPI and TI QSPI"

* tag 'spi-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (133 commits)
  spi/qspi: fix missing unlock on error in ti_qspi_start_transfer_one()
  spi: quad: fix the name of DT property
  spi: core: Fix spi_register_master error handling
  spi: efm32: Fix build error
  spi: altera: Use DIV_ROUND_UP to calculate hw->bytes_per_word
  spi: rspi: Add spi_master_get() call to prevent use after free
  spi: quad: Make DT properties optional
  spi: quad: Fix missing return
  spi: Use dev_get_drvdata at appropriate places
  spi: use dev_get_platdata()
  spi: nuc900: Fix mode_bits setting
  spi: simplify devm_request_mem_region/devm_ioremap
  spi: altera: Simplify altera_spi_txrx implementation for noirq case
  spi: spi-rspi: fix inconsistent spin_lock_irqsave
  spi/qspi: Add compatible string for am4372.
  spi/qspi: Fix device table entry
  spi/sirf: fix the misunderstanding about len of spi_transfer
  spi/qspi: Add dual/quad spi read support
  spi: sirf: fix error return code in spi_sirfsoc_probe()
  spi: bcm2835: Add spi_master_get() call to prevent use after free
  ...

3 files changed, 47 insertions, 8 deletions

diff --git a/include/linux/platform_data/efm32-spi.h b/include/linux/platform_data/efm32-spi.h
new file mode 100644
index 00000000000..31b19ca1d73
--- /dev/null
+++ b/include/linux/platform_data/efm32-spi.h
@@ -0,0 +1,14 @@
+#ifndef __LINUX_PLATFORM_DATA_EFM32_SPI_H__
+#define __LINUX_PLATFORM_DATA_EFM32_SPI_H__
+
+#include <linux/types.h>
+
+/**
+ * struct efm32_spi_pdata
+ * @location: pinmux location for the I/O pins (to be written to the ROUTE
+ * 	register)
+ */
+struct efm32_spi_pdata {
+	u8 location;
+};
+#endif /* ifndef __LINUX_PLATFORM_DATA_EFM32_SPI_H__ */
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 28e440be1c0..887116dbce2 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -74,7 +74,7 @@ struct spi_device {
 	struct spi_master	*master;
 	u32			max_speed_hz;
 	u8			chip_select;
-	u8			mode;
+	u16			mode;
 #define	SPI_CPHA	0x01			/* clock phase */
 #define	SPI_CPOL	0x02			/* clock polarity */
 #define	SPI_MODE_0	(0|0)			/* (original MicroWire) */
@@ -87,6 +87,10 @@ struct spi_device {
 #define	SPI_LOOP	0x20			/* loopback mode */
 #define	SPI_NO_CS	0x40			/* 1 dev/bus, no chipselect */
 #define	SPI_READY	0x80			/* slave pulls low to pause */
+#define	SPI_TX_DUAL	0x100			/* transmit with 2 wires */
+#define	SPI_TX_QUAD	0x200			/* transmit with 4 wires */
+#define	SPI_RX_DUAL	0x400			/* receive with 2 wires */
+#define	SPI_RX_QUAD	0x800			/* receive with 4 wires */
 	u8			bits_per_word;
 	int			irq;
 	void			*controller_state;
@@ -233,6 +237,8 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
  *	suported. If set, the SPI core will reject any transfer with an
  *	unsupported bits_per_word. If not set, this value is simply ignored,
  *	and it's up to the individual driver to perform any validation.
+ * @min_speed_hz: Lowest supported transfer speed
+ * @max_speed_hz: Highest supported transfer speed
  * @flags: other constraints relevant to this driver
  * @bus_lock_spinlock: spinlock for SPI bus locking
  * @bus_lock_mutex: mutex for SPI bus locking
@@ -254,6 +260,9 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
  * @busy: message pump is busy
  * @running: message pump is running
  * @rt: whether this queue is set to run as a realtime task
+ * @auto_runtime_pm: the core should ensure a runtime PM reference is held
+ *                   while the hardware is prepared, using the parent
+ *                   device for the spidev
  * @prepare_transfer_hardware: a message will soon arrive from the queue
  *	so the subsystem requests the driver to prepare the transfer hardware
  *	by issuing this call
@@ -309,9 +318,13 @@ struct spi_master {
 	/* bitmask of supported bits_per_word for transfers */
 	u32			bits_per_word_mask;
 #define SPI_BPW_MASK(bits) BIT((bits) - 1)
-#define SPI_BIT_MASK(bits) (((bits) == 32) ? ~0UL : (BIT(bits) - 1))
+#define SPI_BIT_MASK(bits) (((bits) == 32) ? ~0U : (BIT(bits) - 1))
 #define SPI_BPW_RANGE_MASK(min, max) (SPI_BIT_MASK(max) - SPI_BIT_MASK(min - 1))
 
+	/* limits on transfer speed */
+	u32			min_speed_hz;
+	u32			max_speed_hz;
+
 	/* other constraints relevant to this driver */
 	u16			flags;
 #define SPI_MASTER_HALF_DUPLEX	BIT(0)		/* can't do full duplex */
@@ -374,11 +387,13 @@ struct spi_master {
 	bool				busy;
 	bool				running;
 	bool				rt;
+	bool				auto_runtime_pm;
 
 	int (*prepare_transfer_hardware)(struct spi_master *master);
 	int (*transfer_one_message)(struct spi_master *master,
 				    struct spi_message *mesg);
 	int (*unprepare_transfer_hardware)(struct spi_master *master);
+
 	/* gpio chip select */
 	int			*cs_gpios;
 };
@@ -448,6 +463,10 @@ extern struct spi_master *spi_busnum_to_master(u16 busnum);
  * @rx_buf: data to be read (dma-safe memory), or NULL
  * @tx_dma: DMA address of tx_buf, if @spi_message.is_dma_mapped
  * @rx_dma: DMA address of rx_buf, if @spi_message.is_dma_mapped
+ * @tx_nbits: number of bits used for writting. If 0 the default
+ *      (SPI_NBITS_SINGLE) is used.
+ * @rx_nbits: number of bits used for reading. If 0 the default
+ *      (SPI_NBITS_SINGLE) is used.
  * @len: size of rx and tx buffers (in bytes)
  * @speed_hz: Select a speed other than the device default for this
  *      transfer. If 0 the default (from @spi_device) is used.
@@ -502,6 +521,11 @@ extern struct spi_master *spi_busnum_to_master(u16 busnum);
  * by the results of previous messages and where the whole transaction
  * ends when the chipselect goes intactive.
  *
+ * When SPI can transfer in 1x,2x or 4x. It can get this tranfer information
+ * from device through @tx_nbits and @rx_nbits. In Bi-direction, these
+ * two should both be set. User can set transfer mode with SPI_NBITS_SINGLE(1x)
+ * SPI_NBITS_DUAL(2x) and SPI_NBITS_QUAD(4x) to support these three transfer.
+ *
  * The code that submits an spi_message (and its spi_transfers)
  * to the lower layers is responsible for managing its memory.
  * Zero-initialize every field you don't set up explicitly, to
@@ -522,6 +546,11 @@ struct spi_transfer {
 	dma_addr_t	rx_dma;
 
 	unsigned	cs_change:1;
+	u8		tx_nbits;
+	u8		rx_nbits;
+#define	SPI_NBITS_SINGLE	0x01 /* 1bit transfer */
+#define	SPI_NBITS_DUAL		0x02 /* 2bits transfer */
+#define	SPI_NBITS_QUAD		0x04 /* 4bits transfer */
 	u8		bits_per_word;
 	u16		delay_usecs;
 	u32		speed_hz;
@@ -578,6 +607,7 @@ struct spi_message {
 	/* completion is reported through a callback */
 	void			(*complete)(void *context);
 	void			*context;
+	unsigned		frame_length;
 	unsigned		actual_length;
 	int			status;
 
@@ -869,7 +899,7 @@ struct spi_board_info {
 	/* mode becomes spi_device.mode, and is essential for chips
 	 * where the default of SPI_CS_HIGH = 0 is wrong.
 	 */
-	u8		mode;
+	u16		mode;
 
 	/* ... may need additional spi_device chip config data here.
 	 * avoid stuff protocol drivers can set; but include stuff
diff --git a/include/linux/spi/spi_bitbang.h b/include/linux/spi/spi_bitbang.h
index f987a2bee16..daebaba886a 100644
--- a/include/linux/spi/spi_bitbang.h
+++ b/include/linux/spi/spi_bitbang.h
@@ -4,11 +4,7 @@
 #include <linux/workqueue.h>
 
 struct spi_bitbang {
-	struct workqueue_struct	*workqueue;
-	struct work_struct	work;
-
 	spinlock_t		lock;
-	struct list_head	queue;
 	u8			busy;
 	u8			use_dma;
 	u8			flags;		/* extra spi->mode support */
@@ -41,7 +37,6 @@ struct spi_bitbang {
  */
 extern int spi_bitbang_setup(struct spi_device *spi);
 extern void spi_bitbang_cleanup(struct spi_device *spi);
-extern int spi_bitbang_transfer(struct spi_device *spi, struct spi_message *m);
 extern int spi_bitbang_setup_transfer(struct spi_device *spi,
 				      struct spi_transfer *t);