spi: move cs spi_delay to spi_device

As we know, spi core layer has removed spi_set_cs_timing() API.
So this patch moved spi_delay for cs_timing from spi_controller
to spi_device, because cs timing should be set by spi_device but
not controller.
Signed-off-by: Mason Zhang <Mason.Zhang@mediatek.com>
Link: https://lore.kernel.org/r/20210804133716.32040-1-Mason.Zhang@mediatek.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi.c

@@ -842,9 +842,9 @@ static void spi_set_cs(struct spi_device *spi, bool enable, bool force)
 	if (spi->cs_gpiod || gpio_is_valid(spi->cs_gpio) ||
 	    !spi->controller->set_cs_timing) {
 		if (activate)
-			spi_delay_exec(&spi->controller->cs_setup, NULL);
+			spi_delay_exec(&spi->cs_setup, NULL);
 		else
-			spi_delay_exec(&spi->controller->cs_hold, NULL);
+			spi_delay_exec(&spi->cs_hold, NULL);
 	}
 
 	if (spi->mode & SPI_CS_HIGH)
@@ -887,7 +887,7 @@ static void spi_set_cs(struct spi_device *spi, bool enable, bool force)
 	if (spi->cs_gpiod || gpio_is_valid(spi->cs_gpio) ||
 	    !spi->controller->set_cs_timing) {
 		if (!activate)
-			spi_delay_exec(&spi->controller->cs_inactive, NULL);
+			spi_delay_exec(&spi->cs_inactive, NULL);
 	}
 }
 

include/linux/spi/spi.h

@@ -147,7 +147,11 @@ extern int spi_delay_exec(struct spi_delay *_delay, struct spi_transfer *xfer);
  *	not using a GPIO line)
  * @word_delay: delay to be inserted between consecutive
  *	words of a transfer
- *
+ * @cs_setup: delay to be introduced by the controller after CS is asserted
+ * @cs_hold: delay to be introduced by the controller before CS is deasserted
+ * @cs_inactive: delay to be introduced by the controller after CS is
+ *	deasserted. If @cs_change_delay is used from @spi_transfer, then the
+ *	two delays will be added up.
  * @statistics: statistics for the spi_device
  *
  * A @spi_device is used to interchange data between an SPI slave
@@ -188,6 +192,10 @@ struct spi_device {
 	int			cs_gpio;	/* LEGACY: chip select gpio */
 	struct gpio_desc	*cs_gpiod;	/* chip select gpio desc */
 	struct spi_delay	word_delay; /* inter-word delay */
+	/* CS delays */
+	struct spi_delay	cs_setup;
+	struct spi_delay	cs_hold;
+	struct spi_delay	cs_inactive;
 
 	/* the statistics */
 	struct spi_statistics	statistics;
@@ -413,11 +421,6 @@ extern struct spi_device *spi_new_ancillary_device(struct spi_device *spi, u8 ch
  *	     controller has native support for memory like operations.
  * @unprepare_message: undo any work done by prepare_message().
  * @slave_abort: abort the ongoing transfer request on an SPI slave controller
- * @cs_setup: delay to be introduced by the controller after CS is asserted
- * @cs_hold: delay to be introduced by the controller before CS is deasserted
- * @cs_inactive: delay to be introduced by the controller after CS is
- *	deasserted. If @cs_change_delay is used from @spi_transfer, then the
- *	two delays will be added up.
  * @cs_gpios: LEGACY: array of GPIO descs to use as chip select lines; one per
  *	CS number. Any individual value may be -ENOENT for CS lines that
  *	are not GPIOs (driven by the SPI controller itself). Use the cs_gpiods
@@ -639,11 +642,6 @@ struct spi_controller {
 	/* Optimized handlers for SPI memory-like operations. */
 	const struct spi_controller_mem_ops *mem_ops;
 
-	/* CS delays */
-	struct spi_delay	cs_setup;
-	struct spi_delay	cs_hold;
-	struct spi_delay	cs_inactive;
-
 	/* gpio chip select */
 	int			*cs_gpios;
 	struct gpio_desc	**cs_gpiods;