Merge series "spi: finalize 'delay_usecs' removal/transition" from Alexandru Ardelean <aardelean@deviqon.com>:

A while back I started the introduction of the 'spi_delay' data type:
  https://lore.kernel.org/linux-spi/20190926105147.7839-1-alexandru.ardelean@analog.com/

Users of the 'delay_usecs' were removed from drivers.

Now it's time to remove the 'delay_usecs' from the SPI subsystem and use
only the 'delay' field.

This changeset adapts all SPI drivers to do without 'delay_usecs'.
Additionally, for greybus we need to adapt it to use the 'delay' in
nano-seconds and convert it to micro-seconds.

Alexandru Ardelean (10):
  spi: spi-axi-spi-engine: remove usage of delay_usecs
  spi: bcm63xx-spi: don't check 'delay_usecs' field
  spi: spi-bcm-qspi: replace 'delay_usecs' with 'delay.value' check
  spi: spi-sh: replace 'delay_usecs' with 'delay.value' in pr_debug
  spi: spi-tegra20-flash: don't check 'delay_usecs' field for spi
    transfer
  staging: greybus: spilib: use 'spi_delay_to_ns' for getting xfer delay
  spi: spi-falcon: remove check for 'delay_usecs'
  spi: fsl-espi: remove usage of 'delay_usecs' field
  spi: core: remove 'delay_usecs' field from spi_transfer
  spi: docs: update info about 'delay_usecs'

 Documentation/spi/spi-summary.rst |  7 +++++--
 drivers/spi/spi-axi-spi-engine.c  | 12 ++++--------
 drivers/spi/spi-bcm-qspi.c        |  2 +-
 drivers/spi/spi-bcm63xx.c         |  2 +-
 drivers/spi/spi-falcon.c          |  2 +-
 drivers/spi/spi-fsl-espi.c        | 17 +++++------------
 drivers/spi/spi-sh.c              |  4 ++--
 drivers/spi/spi-tegra20-sflash.c  |  3 +--
 drivers/spi/spi.c                 |  1 -
 drivers/staging/greybus/spilib.c  |  5 ++++-
 include/linux/spi/spi.h           | 12 ------------
 11 files changed, 24 insertions(+), 43 deletions(-)

--
2.29.2

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1 files changed, 0 insertions, 12 deletions

diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 592897fa4f03..ea1784a43267 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -832,9 +832,6 @@ extern void spi_res_release(struct spi_controller *ctlr,
  * @delay: delay to be introduced after this transfer before
  *	(optionally) changing the chipselect status, then starting
  *	the next transfer or completing this @spi_message.
- * @delay_usecs: microseconds to delay after this transfer before
- *	(optionally) changing the chipselect status, then starting
- *	the next transfer or completing this @spi_message.
  * @word_delay: inter word delay to be introduced after each word size
  *	(set by bits_per_word) transmission.
  * @effective_speed_hz: the effective SCK-speed that was used to
@@ -946,7 +943,6 @@ struct spi_transfer {
 #define	SPI_NBITS_DUAL		0x02 /* 2bits transfer */
 #define	SPI_NBITS_QUAD		0x04 /* 4bits transfer */
 	u8		bits_per_word;
-	u16		delay_usecs;
 	struct spi_delay	delay;
 	struct spi_delay	cs_change_delay;
 	struct spi_delay	word_delay;
@@ -1060,14 +1056,6 @@ spi_transfer_del(struct spi_transfer *t)
 static inline int
 spi_transfer_delay_exec(struct spi_transfer *t)
 {
-	struct spi_delay d;
-
-	if (t->delay_usecs) {
-		d.value = t->delay_usecs;
-		d.unit = SPI_DELAY_UNIT_USECS;
-		return spi_delay_exec(&d, NULL);
-	}
-
 	return spi_delay_exec(&t->delay, t);
 }