Merge tag 'spi-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "A fairly standard release for SPI with the exception of a change to
  the API for specifying chip selects done in preparation for supporting
  devices with more than one chip select, this required some mechanical
  changes throughout the tree which have been cooking in -next happily
  for a while.

  There's also a new API to allow us to support TPM chips on half duplex
  controllers.

  Summary:

   - Refactoring in preparation for supporting multiple chip selects for
     a single device, needed by some flash devices, which required a
     change in the SPI device API visible throughout the tree

   - Support for hardware assisted interaction with SPI TPMs on half
     duplex controllers, implemented on nVidia Tedra210 QuadSPI

   - Optimisation for large transfers on fsl-cpm devices

   - Cleanups around device property use which fix some sisues with
     fwnode

   - Use of both void remove() and devm_platform_.*ioremap_resource()

   - Support for AMD Pensando Elba, Amlogic A1, Cadence device mode,
     Intel MetorLake-S and StarFive J7110 QuadSPI"

* tag 'spi-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (185 commits)
  spi: bcm63xx: use macro DEFINE_SIMPLE_DEV_PM_OPS
  spi: tegra210-quad: Enable TPM wait polling
  spi: Add TPM HW flow flag
  spi: bcm63xx: remove PM_SLEEP based conditional compilation
  spi: cadence-quadspi: use macro DEFINE_SIMPLE_DEV_PM_OPS
  spi: spi-cadence: Add support for Slave mode
  spi: spi-cadence: Switch to spi_controller structure
  spi: cadence-quadspi: fix suspend-resume implementations
  spi: dw: Add support for AMD Pensando Elba SoC
  spi: dw: Add AMD Pensando Elba SoC SPI Controller
  spi: cadence-quadspi: Disable the SPI before reconfiguring
  spi: cadence-quadspi: Update the read timeout based on the length
  spi: spi-loopback-test: Add module param for iteration length
  spi: add support for Amlogic A1 SPI Flash Controller
  dt-bindings: spi: add Amlogic A1 SPI controller
  spi: fsl-spi: No need to check transfer length versus word size
  spi: fsl-spi: Change mspi_apply_cpu_mode_quirks() to void
  spi: fsl-cpm: Use 16 bit mode for large transfers with even size
  spi: fsl-spi: Re-organise transfer bits_per_word adaptation
  spi: fsl-spi: Fix CPM/QE mode Litte Endian
  ...

3 files changed, 31 insertions, 16 deletions

diff --git a/include/linux/platform_data/spi-s3c64xx.h b/include/linux/platform_data/spi-s3c64xx.h
index 5df1ace6d2c9..3101152ce449 100644
--- a/include/linux/platform_data/spi-s3c64xx.h
+++ b/include/linux/platform_data/spi-s3c64xx.h
@@ -29,6 +29,7 @@ struct s3c64xx_spi_csinfo {
  * struct s3c64xx_spi_info - SPI Controller defining structure
  * @src_clk_nr: Clock source index for the CLK_CFG[SPI_CLKSEL] field.
  * @num_cs: Number of CS this controller emulates.
+ * @no_cs: Used when CS line is not connected.
  * @cfg_gpio: Configure pins for this SPI controller.
  */
 struct s3c64xx_spi_info {
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 4fa26b9a3572..cfe42f8cd7a4 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -184,8 +184,18 @@ struct spi_device {
 	u8			chip_select;
 	u8			bits_per_word;
 	bool			rt;
-#define SPI_NO_TX	BIT(31)		/* No transmit wire */
-#define SPI_NO_RX	BIT(30)		/* No receive wire */
+#define SPI_NO_TX		BIT(31)		/* No transmit wire */
+#define SPI_NO_RX		BIT(30)		/* No receive wire */
+	/*
+	 * TPM specification defines flow control over SPI. Client device
+	 * can insert a wait state on MISO when address is transmitted by
+	 * controller on MOSI. Detecting the wait state in software is only
+	 * possible for full duplex controllers. For controllers that support
+	 * only half-duplex, the wait state detection needs to be implemented
+	 * in hardware. TPM devices would set this flag when hardware flow
+	 * control is expected from SPI controller.
+	 */
+#define SPI_TPM_HW_FLOW		BIT(29)		/* TPM HW flow control */
 	/*
 	 * All bits defined above should be covered by SPI_MODE_KERNEL_MASK.
 	 * The SPI_MODE_KERNEL_MASK has the SPI_MODE_USER_MASK counterpart,
@@ -195,7 +205,7 @@ struct spi_device {
 	 * These bits must not overlap. A static assert check should make sure of that.
 	 * If adding extra bits, make sure to decrease the bit index below as well.
 	 */
-#define SPI_MODE_KERNEL_MASK	(~(BIT(30) - 1))
+#define SPI_MODE_KERNEL_MASK	(~(BIT(29) - 1))
 	u32			mode;
 	int			irq;
 	void			*controller_state;
@@ -244,7 +254,7 @@ static inline void spi_dev_put(struct spi_device *spi)
 }
 
 /* ctldata is for the bus_controller driver's runtime state */
-static inline void *spi_get_ctldata(struct spi_device *spi)
+static inline void *spi_get_ctldata(const struct spi_device *spi)
 {
 	return spi->controller_state;
 }
@@ -261,12 +271,12 @@ static inline void spi_set_drvdata(struct spi_device *spi, void *data)
 	dev_set_drvdata(&spi->dev, data);
 }
 
-static inline void *spi_get_drvdata(struct spi_device *spi)
+static inline void *spi_get_drvdata(const struct spi_device *spi)
 {
 	return dev_get_drvdata(&spi->dev);
 }
 
-static inline u8 spi_get_chipselect(struct spi_device *spi, u8 idx)
+static inline u8 spi_get_chipselect(const struct spi_device *spi, u8 idx)
 {
 	return spi->chip_select;
 }
@@ -276,7 +286,7 @@ static inline void spi_set_chipselect(struct spi_device *spi, u8 idx, u8 chipsel
 	spi->chip_select = chipselect;
 }
 
-static inline struct gpio_desc *spi_get_csgpiod(struct spi_device *spi, u8 idx)
+static inline struct gpio_desc *spi_get_csgpiod(const struct spi_device *spi, u8 idx)
 {
 	return spi->cs_gpiod;
 }
@@ -1093,6 +1103,9 @@ struct spi_message {
 
 	unsigned		is_dma_mapped:1;
 
+	/* spi_prepare_message() was called for this message */
+	bool			prepared;
+
 	/* REVISIT:  we might want a flag affecting the behavior of the
 	 * last transfer ... allowing things like "read 16 bit length L"
 	 * immediately followed by "read L bytes".  Basically imposing
@@ -1105,11 +1118,11 @@ struct spi_message {
 	 */
 
 	/* Completion is reported through a callback */
+	int			status;
 	void			(*complete)(void *context);
 	void			*context;
 	unsigned		frame_length;
 	unsigned		actual_length;
-	int			status;
 
 	/* For optional use by whatever driver currently owns the
 	 * spi_message ...  between calls to spi_async and then later
@@ -1120,9 +1133,6 @@ struct spi_message {
 
 	/* List of spi_res reources when the spi message is processed */
 	struct list_head        resources;
-
-	/* spi_prepare_message() was called for this message */
-	bool			prepared;
 };
 
 static inline void spi_message_init_no_memset(struct spi_message *m)
@@ -1295,6 +1305,10 @@ extern int spi_split_transfers_maxsize(struct spi_controller *ctlr,
 				       struct spi_message *msg,
 				       size_t maxsize,
 				       gfp_t gfp);
+extern int spi_split_transfers_maxwords(struct spi_controller *ctlr,
+					struct spi_message *msg,
+					size_t maxwords,
+					gfp_t gfp);
 
 /*---------------------------------------------------------------------------*/
 
diff --git a/include/trace/events/spi.h b/include/trace/events/spi.h
index c0d9844befd7..c0248a8fa79c 100644
--- a/include/trace/events/spi.h
+++ b/include/trace/events/spi.h
@@ -57,7 +57,7 @@ TRACE_EVENT(spi_setup,
 
 	TP_fast_assign(
 		__entry->bus_num = spi->controller->bus_num;
-		__entry->chip_select = spi->chip_select;
+		__entry->chip_select =  spi_get_chipselect(spi, 0);
 		__entry->mode = spi->mode;
 		__entry->bits_per_word = spi->bits_per_word;
 		__entry->max_speed_hz = spi->max_speed_hz;
@@ -88,7 +88,7 @@ TRACE_EVENT(spi_set_cs,
 
 	TP_fast_assign(
 		__entry->bus_num = spi->controller->bus_num;
-		__entry->chip_select = spi->chip_select;
+		__entry->chip_select = spi_get_chipselect(spi, 0);
 		__entry->mode = spi->mode;
 		__entry->enable = enable;
 	),
@@ -113,7 +113,7 @@ DECLARE_EVENT_CLASS(spi_message,
 
 	TP_fast_assign(
 		__entry->bus_num = msg->spi->controller->bus_num;
-		__entry->chip_select = msg->spi->chip_select;
+		__entry->chip_select = spi_get_chipselect(msg->spi, 0);
 		__entry->msg = msg;
 	),
 
@@ -154,7 +154,7 @@ TRACE_EVENT(spi_message_done,
 
 	TP_fast_assign(
 		__entry->bus_num = msg->spi->controller->bus_num;
-		__entry->chip_select = msg->spi->chip_select;
+		__entry->chip_select = spi_get_chipselect(msg->spi, 0);
 		__entry->msg = msg;
 		__entry->frame = msg->frame_length;
 		__entry->actual = msg->actual_length;
@@ -197,7 +197,7 @@ DECLARE_EVENT_CLASS(spi_transfer,
 
 	TP_fast_assign(
 		__entry->bus_num = msg->spi->controller->bus_num;
-		__entry->chip_select = msg->spi->chip_select;
+		__entry->chip_select = spi_get_chipselect(msg->spi, 0);
 		__entry->xfer = xfer;
 		__entry->len = xfer->len;